Tuesday, 6 December 2011

Kepler 22-b: A Earth-like planet

Astronomers have confirmed the existence of an Earth-like planet in the "habitable zone" around a star not unlike our own.
The planet, Kepler 22-b, lies about 600 light-years away and is about 2.4 times the size of Earth, and has a temperature of about 22C.
It is the closest confirmed planet yet to one like ours - an "Earth 2.0".
However, the team does not yet know if Kepler 22-b is made mostly of rock, gas or liquid.
During the conference at which the result was announced, the Kepler team also said that it had spotted some 1,094 new candidate planets - nearly doubling the telescope's haul of potential far-flung worlds.
Kepler 22-b was one of 54 exoplanet candidates in habitable zones reported by the Kepler team in February, and is just the first to be formally confirmed using other telescopes.
More of these "Earth 2.0" candidates are likely to be confirmed in the near future, though a redefinition of the habitable zone's boundaries has brought that number down to 48. Ten of those are Earth-sized.
'Superb opportunity' The Kepler space telescope was designed to look at a fixed swathe of the night sky, staring intently at about 150,000 stars. The telescope is sensitive enough to see when a planet passes in front of its host star, dimming the star's light by a minuscule amount.
Kepler identifies these slight changes in starlight as candidate planets, which are then confirmed by further observations by Kepler and other telescopes in orbit and on Earth.

Kepler Space Telescope

Infographic (BBC)
  • Stares fixedly at a patch corresponding to 1/400th of the sky
  • Looks at more than 155,000 stars
  • Has so far found 2,326 candidate planets
  • Among them are 207 Earth-sized planets, 10 of which are in the "habitable zone" where liquid water can exist
Kepler 22-b lies 15% closer to its sun than the Earth is to our Sun, and its year takes about 290 days. However, the planet's host star puts out about 25% less light, keeping the planet at its balmy temperature that would support the existence of liquid water.
The Kepler team had to wait for three passes of the planet before upping its status from "candidate" to "confirmed".
"Fortune smiled upon us with the detection of this planet," said William Borucki, Kepler principal investigator at Nasa's Ames Research Center.
"The first transit was captured just three days after we declared the spacecraft operationally ready. We witnessed the defining third transit over the 2010 holiday season."
The results were announced at the Kepler telescope's first science conference, alongside the staggering number of new candidate planets. The total number of candidates spotted by the telescope is now 2,326 - of which 207 are approximately Earth-sized.
In total, the results suggest that planets ranging from Earth-sized to about four times Earth's size - so-called "super-Earths" - may be more common than previously thought.
As candidates for planets similar to Earth are confirmed, the Search for Extraterrestrial Intelligence (Seti) has a narrower focus for its ongoing hunt.
"This is a superb opportunity for Seti observations," said Jill Tarter, the director of the Center for Seti Research at the Seti Institute.
"For the first time, we can point our telescopes at stars, and know that those stars actually host planetary systems - including at least one that begins to approximate an Earth analogue in the habitable zone around its host star.


NASA's Kepler mission has confirmed its first planet in the "habitable zone," the region where liquid water could exist on a planet’s surface. Kepler also has discovered more than 1,000 new planet candidates, nearly doubling its previously known count. Ten of these candidates are near-Earth-size and orbit in the habitable zone of their host star. Candidates require follow-up observations to verify they are actual planets.

The newly confirmed planet, Kepler-22b, is the smallest yet found to orbit in the middle of the habitable zone of a star similar to our sun. The planet is about 2.4 times the radius of Earth. Scientists don't yet know if Kepler-22b has a predominantly rocky, gaseous or liquid composition, but its discovery is a step closer to finding Earth-like planets.

Previous research hinted at the existence of near-Earth-size planets in habitable zones, but clear confirmation proved elusive. Two other small planets orbiting stars smaller and cooler than our sun recently were confirmed on the very edges of the habitable zone, with orbits more closely resembling those of Venus and Mars.

"This is a major milestone on the road to finding Earth's twin," said Douglas Hudgins, Kepler program scientist at NASA Headquarters in Washington. "Kepler's results continue to demonstrate the importance of NASA's science missions, which aim to answer some of the biggest questions about our place in the universe."

Kepler discovers planets and planet candidates by measuring dips in the brightness of more than 150,000 stars to search for planets that cross in front, or "transit," the stars. Kepler requires at least three transits to verify a signal as a planet.

"Fortune smiled upon us with the detection of this planet," said William Borucki, Kepler principal investigator at NASA Ames Research Center at Moffett Field, Calif., who led the team that discovered Kepler-22b. "The first transit was captured just three days after we declared the spacecraft operationally ready. We witnessed the defining third transit over the 2010 holiday season."

The Kepler science team uses ground-based telescopes and the Spitzer Space Telescope to review observations on planet candidates the spacecraft finds. The star field that Kepler observes in the constellations Cygnus and Lyra can only be seen from ground-based observatories in spring through early fall. The data from these other observations help determine which candidates can be validated as planets.

Kepler-22b is located 600 light-years away. While the planet is larger than Earth, its orbit of 290 days around a sun-like star resembles that of our world. The planet's host star belongs to the same class as our sun, called G-type, although it is slightly smaller and cooler.

Of the 54 habitable zone planet candidates reported in February 2011, Kepler-22b is the first to be confirmed. This milestone will be published in The Astrophysical Journal.

The Kepler team is hosting its inaugural science conference at Ames Dec. 5-9, announcing 1,094 new planet candidate discoveries. Since the last catalog was released in February, the number of planet candidates identified by Kepler has increased by 89 percent and now totals 2,326. Of these, 207 are approximately Earth-size, 680 are super Earth-size, 1,181 are Neptune-size, 203 are Jupiter-size and 55 are larger than Jupiter.

The findings, based on observations conducted May 2009 to September 2010, show a dramatic increase in the numbers of smaller-size planet candidates.

Kepler observed many large planets in small orbits early in its mission, which were reflected in the February data release. Having had more time to observe three transits of planets with longer orbital periods, the new data suggest that planets one to four times the size of Earth may be abundant in the galaxy.

The number of Earth-size and super Earth-size candidates has increased by more than 200 and 140 percent since February, respectively.

There are 48 planet candidates in their star's habitable zone. While this is a decrease from the 54 reported in February, the Kepler team has applied a stricter definition of what constitutes a habitable zone in the new catalog, to account for the warming effect of atmospheres, which would move the zone away from the star, out to longer orbital periods.

"The tremendous growth in the number of Earth-size candidates tells us that we're honing in on the planets Kepler was designed to detect: those that are not only Earth-size, but also are potentially habitable," said Natalie Batalha, Kepler deputy science team lead at San Jose State University in San Jose, Calif. "The more data we collect, the keener our eye for finding the smallest planets out at longer orbital periods."

NASA's Ames Research Center manages Kepler's ground system development, mission operations and science data analysis. NASA's Jet Propulsion Laboratory in Pasadena, Calif., managed Kepler mission development.

Ball Aerospace and Technologies Corp. in Boulder, Colo., developed the Kepler flight system and supports mission operations with the Laboratory for Atmospheric and Space Physics at the University of Colorado in Boulder.

The Space Telescope Science Institute in Baltimore archives, hosts and distributes the Kepler science data. Kepler is NASA's 10th Discovery Mission and is funded by NASA's Science Mission Directorate at the agency's headquarters.

Wednesday, 23 November 2011

Pathani Samanta Chandrasekhar - The Naked Eye Astronomer /Astrologer


In the serene corridors of the Indian Institute of Astrophysics, Bangalore, I recently had the privilege of attending a daytime workshop on astronomy. Amidst stimulating discussions and celestial charts, I was drawn into the fascinating world of Shri Pathani Samanta Chandrasekhar — a name that shines quietly yet powerfully in the annals of Indian scientific thought.

This reflection is divided into two parts: a brief historical sketch and a deeper exploration of his astronomical insights. In India, Astrology and Astronomy have long been interwoven — like two sides of the same cosmic coin. Indian astrology, in its authentic form, rests largely on astronomical observation, nearly eighty per cent science and twenty per cent statistical reasoning.

Mahamahopadhyaya Chandra Sekhar Simha Samanta Harichandan Mohapatra, known reverently in Odisha as Pathani Samanta, stands shoulder to shoulder with stalwarts such as Aryabhata, Varahamihira, Brahmagupta, and Bhaskaracharya. He was perhaps the only true scientific astrologer of modern India, a bridge between the ancient Siddhantic tradition and the emerging rational spirit of the 19th century.

Uninfluenced by colonial education, Samanta taught himself Sanskrit and immersed in traditional Indian astronomy and astrology. From humble materials — bamboo strips, wooden sticks, and simple cords — he crafted precision instruments with remarkable ingenuity. His observations, often made under open skies and recorded by lamplight, were gathered into a masterwork of scientific poetry — his celebrated treatise, the Siddhanta Darpana.

Serving as Chief Court Astrologer to the King of Puri and the Jagannath Temple, Samanta Chandrasekhar embodied both devotion and discipline. Legend has it that he predicted the date of his own death, and passed away exactly as foretold. His manual computation of the Venus Transit of 1874, using homemade devices and even reflections of oil on water, reveals both his creativity and the purity of his scientific pursuit. That same year, he granted his only interview to an American magazine — a record still preserved in the archives of the Government of Odisha.

Born on 13 December 1835 (Pausha Krishna Ashtami, Saka Year 1757) in Khandapara, now in Nayagarh district, he grew up in a small princely state surrounded by hills and forests. Then part of the Gadajat territories under indirect British rule, Khandapara covered just 244 square miles. It was ruled at the time by King Natabar Singh Mardaraj, Samanta’s nephew and the eleventh monarch of the dynasty.

His parents, Shyamabandhu and Bishnumali, were deeply spiritual. Having lost one son and two daughters in infancy, they named the new child Pathani Samanta — a name that would later echo through the corridors of Indian science.

Samanta’s complete name, Mahamahopadhyaya Chandrasekhar Singh Harichandan Mohapatra Samant, appears on his magnum opus Siddhanta Darpana, published by Calcutta University in 1899. The original manuscript, written on palm leaves in 2,500 Sanskrit verses, was painstakingly transcribed into the Oriya script by Samanta himself — a labour of love between scholarship and devotion.

He received his early education in Sanskrit under a local Brahmin teacher, mastering grammar, smritis, puranas, darshanas, and several kavyas. His fascination with the heavens began at the age of ten, when his uncle first pointed out the stars and shared the rudiments of astrology. Though he never attended a university, his relentless curiosity and self-discipline transformed him into one of India’s most remarkable self-taught astronomers.

The Siddhanta Darpana, composed entirely in Sanskrit verse, was hailed in 1899 by scholars across India and even abroad. Professor Jogesh Chandra Ray played a pivotal role in its publication, producing a Devanagari edition with support from the Kings of Athmalik and Mayurbhanj. Prof. Ray’s fifty-six-page English introduction became the window through which the world first glimpsed the profound mathematical elegance contained in Samanta’s work.

In 1893, the British Government honoured him with the title of Mahamahopadhyaya in recognition of his contribution to astronomy. Samanta Chandrasekhar passed away in 1904, but even today, most Oriya almanacs continue to rely on his astronomical formulations.

He was a keen observer, guided more by intuition and handmade instruments than by formal tools of modern science. His observations often challenged the classical Siddhantic models — a conflict that had earlier perplexed Sawai Jai Singh in the 18th century, inspiring him to build his great masonry observatories. The core issue was the same: the gradual detachment of Indian astronomy from empirical observation. Samanta’s work sought to restore that sacred link between sky and calculation — between the seen and the known.





The Celestial Grammar: Ayanamasa and the Transit of Venus

The precession of the equinoxes—known in Indian astronomy as Ayanamasa—was recognised by Indian astronomers as far back as the Vedic period. They understood that the shifting of the equinoctial points affected the positions of stars and planets over time. To account for this, they introduced what were called bīja corrections—mathematical adjustments made to keep celestial calculations accurate as centuries passed.

However, nearly a millennium before the time of Sawai Jai Singh and Pathani Samanta, the observational tradition had faded. The calculations of planetary positions, or ephemeral elements, were handed down without verification against the sky. Observation had given way to repetition.

Samanta Chandrasekhar sought to revive this lost link between observation and calculation. Drawing upon classical siddhantic methods, he created new sets of ephemeral elements for future predictions. Remarkably, though he operated within the traditional geocentric framework, his results showed impressive precision. His own planetary model, while geocentric in spirit, acknowledged that the other planets revolved around the Sun — a conceptual bridge between Indian and Western systems.

It is important to note that mathematically, the geocentric and heliocentric models can both yield accurate results for many observable events, provided the correct reference framework is used. Samanta may not have accepted the Copernican revolution, but that did not hinder his ability to predict and verify celestial phenomena with extraordinary accuracy. Among these, the most remarkable event during his lifetime was the Transit of Venus on 9 December 1874.

This rare astronomical spectacle — when Venus passes directly between the Earth and the Sun — was visible from India and much of the world. The subsequent transit, in 1882, was not visible from India. The next one observable from the subcontinent would not occur until 8 June 2004, over a century later, an event that rekindled global enthusiasm among astronomers and educators alike. The 2004 transit inspired many to recreate the historic measurements of the Earth–Sun distance, first attempted during earlier transits, through synchronised global observations.

Returning to 1874 — it must have been a period of great excitement for astronomers worldwide. Expeditions from Europe travelled to India to record the event, while observatories under the British administration prepared for precise measurement. Private observatories and princely states also participated enthusiastically. Chintaman Raghunathachary of the Madras Observatory, for instance, produced a popular pamphlet explaining the phenomenon, which was translated into several Indian languages, including Urdu.

Yet, in the quiet hills of Khandapara, far removed from the centres of colonial science, Pathani Samanta was making his own preparations. Whether he learned of the event through word of mouth or predicted it independently remains uncertain. Given his isolation and the absence of European scientific activity in Odisha at that time, it seems more likely that he predicted the transit himself, purely from his own calculations.

Arun Kumar Upadhyaya, in his translation of the Siddhanta Darpana, interprets one of Samanta’s Sanskrit verses as referring to this very event:

“Solar eclipse due to Shukra (Venus) —
To find the eclipse of the Sun by Shukra, their bimba (angular diameters) and the sizes of nearby tara-grahas (stars and planets) are described.
In the Kali year 4975 (1874 AD), a solar eclipse due to Shukra occurred in Vrischika Rasi (Scorpio).
The bimba of Shukra was observed as 1/32 of the Sun’s bimba, equal to 650 yojanas.
Thus it is proven that the apparent sizes of Shukra and other planets are far smaller than that of the Sun.”

This verse reveals not only his observation of the Transit of Venus, but also his precise attempt to quantify the ratio of their apparent diameters. On 9 December 1874, the Sun’s angular diameter measured 32 minutes 29 seconds of arc, while that of Venus was 1 minute 3 seconds of arc—a ratio of approximately 1:30.93, astonishingly close to Samanta’s estimate of 1:32.

Whether guided by distant rumours or by his own celestial mathematics, Pathani Samanta Chandrasekhar had indeed captured one of the most significant astronomical events of the 19th century — from a modest corner of Odisha, with nothing more than bamboo, oil, and his unerring intuition of the stars.







The Measure of Precision

The ratio of the apparent diameters of the Sun and Venus naturally varies from one transit to another, owing to the slight ellipticity of their orbits. For instance, during the Transit of Venus in 2004, the Sun’s apparent diameter was approximately 31 minutes and 31 seconds of arc, while that of Venus measured 58 seconds — giving a ratio of about 1:32.6. The closeness of this value to Pathani Samanta’s 1874 observation of 1:32 demonstrates how remarkably precise his measurement had been — especially given the means available to him.

What makes this achievement truly extraordinary is that Samanta’s observations were entirely non-telescopic. He relied solely on instruments crafted by hand — fashioned from bamboo, wood, string, and calibrated scales — and yet, his results paralleled the accuracy of contemporary European astronomers equipped with sophisticated telescopes.

In both the theoretical calculations and direct observation of the Transit of Venus, Pathani Samanta’s accomplishments may rightly be compared to those of Jeremiah Horrocks, the English astronomer who first predicted and observed the same celestial event in 1639. Yet, there is something quietly poignant about this parallel — for while Horrocks had the support of an emerging scientific Europe, Samanta worked in solitude, guided only by tradition, intellect, and sky. His brilliance shone, therefore, not merely in mathematical insight, but in the spirit of self-reliance that defined Indian scientific thought in the 19th century.

Even today, the name Pathani Samanta Chandrasekhar stands as a testament to the power of indigenous genius — a reminder that science, observation, and devotion need not be divided by geography or era. His Siddhanta Darpana remains a bridge between ancient cosmology and modern astronomy, its verses echoing both the rigour of mathematics and the reverence of a seeker gazing at the stars.

📌 4. Instruments of the Sky: Crafting Tools from Simplicity

What sets Pathani Samanta Chandrasekhar apart from many traditional astronomers is not just his theoretical brilliance, but his ingenious observational methodology. Samanta did not have access to imported telescopes or precision instruments. Instead, he made his own:

  • Gnomons and sundials with calibrated wooden scales

  • Angular measurement devices made from bamboo and string

  • Quadrants and cross-staffs improvised from natural materials

Despite this simplicity, his instruments produced remarkable accuracy — often rivaling those used in trained observatories of his time. Samanta’s creativity demonstrates that true observation lies not in the sophistication of the instrument, but the mind that uses it.

His designs reflect a deep understanding of geometry and mechanics, adapted for local materials and conditions. For example:

  • His wooden quadrants were calibrated against solar noon shadows

  • Bamboo scales were marked using repeated angular measurements with reference stars

  • He layered multiple readings to reduce observational error

These methods reveal a mind harmonising practical craft with abstract calculation, a fusion rarely seen among self-taught scientists.


📌 5. Bridging Two Worlds: Traditional Learning and Empirical Science

Samanta’s journey represents a bridge between two systems:

🔸 The Siddhantic Tradition

This ancient Indian mathematical astronomy, rooted in texts like the Surya Siddhanta, provided a rich framework of formulae, planetary theories, and timekeeping.

🔸 Empirical Observation

By restoring observation as the core measure of truth, Samanta revived what had been lost over centuries — a connection between sky and calculation.

Rather than rejecting tradition, he strengthened it with observational verification:

  • Where texts disagreed with the sky, he recorded evidence meticulously

  • Where classical tables lagged behind real positions, he recalculated them

In doing so, he showed that the Indian astronomical tradition was not a museum of ideas, but a living, evolving science.


📌 6. Contemporaries in Context: How Samanta Fit into Global Astronomy

When we situate Samanta among global astronomy of the 19th century:

 

AstronomerEraContribution
Jeremiah Horrocks1601–1641         First accurate prediction of Venus transit
Sawai Jai Singh II1688–1743            Built observatories; modernised Indian astronomy
Umesh Chandra Dutta19th c.         Popularising astronomy in Bengal
Pathani Samanta1835–1904         Self-taught observer and astrologer

📌 7. Science and Spirituality: A Personal Symbiosis

One of the most fascinating features of Pathani Samanta’s work is how science and devotion coexisted in his worldview:

  • He saw celestial patterns not merely as mathematical entities, but as cosmic rhythms guiding life on Earth.

  • His Sanskrit verse was as much poetry as it was precision science.

  • Observation of the sky was for him a form of reverence, not just measurement.

This blend of empiricism and reverence distinguishes Samanta from many contemporaries — even in India — and resonates with modern movements that seek a holistic understanding of science and culture.


📌 8. The Legacy Today: Education, Inspiration, and Revival

Even more than a century after his passing, Pathani Samanta’s influence continues:

🔹 Almanacs and Panchangas

Many Oriya almanacs still base their calculations on principles Samanta championed — a testament to the robustness of his work.

🔹 Education and Outreach

His life serves as inspiration for students who lack access to traditional laboratories — proving that insight and perseverance can compensate for limited resources.

🔹 Reviving Indigenous Science

In an era where global science seeks inclusivity and pluralism, Samanta’s work is a model of how local knowledge systems contribute meaningfully to universal inquiry.


📌 9. Reflections: Why Samanta Matters in 2026

Today, as we observe transits with satellites and space probes, Samanta reminds us of a timeless truth:

The sky belongs to the curious, not just the equipped.

His life’s work speaks to educators, astronomers, and seekers alike:

✨ Curiosity fuels discovery
✨ Tools enhance insight — but intuition guides it
✨ Tradition enriches science when it embraces observation

Samanta was more than an astronomer of his age — he was a visionary who stood between worlds, thinking deeply with what he had, and teaching generations to look upward with both wonder and logic.


📌 10. Suggested Reading & Resources

Here are some directions for further exploration (beyond the PDF linked earlier):

📘 Indian Astronomical Traditions (anthologies that contextualize Samanta’s place in history)
📙 History of Venus Transit Observations (global comparisons from 17th to 21st century)
📗 Traditional Panchanga Calculations and Modern Astronomy (bridging ancient and contemporary methods)

For those interested in delving deeper into his astronomical work and legacy, an insightful publication is available through the Indian Institute of Astrophysics:
Pathani Samanta Chandrasekhar — An Astronomer Extraordinaire (PDF link)

Original authors and sources acknowledged with gratitude.



📖 Glossary

Ayanamasa – The precession of equinoxes; the slow shift of the equinoctial points along the ecliptic over centuries.
Ephemeral Elements – Mathematical values describing the positions and motions of celestial bodies at a given time.
Bīja Corrections – Periodic adjustments made to astronomical tables to account for gradual shifts caused by precession and other factors.
Siddhantic – Relating to ancient Indian astronomical treatises such as the Surya Siddhanta.
Transit of Venus – A rare celestial event in which Venus passes directly between the Earth and the Sun, appearing as a small black dot crossing the solar disc.
Bimba – Apparent angular diameter or the visible size of a celestial object as seen from Earth.
Yojana – An ancient Indian unit of distance, roughly equivalent to 12–15 kilometres.
Geocentric / Heliocentric Systems – Models describing the structure of the solar system; geocentric places the Earth at the centre, heliocentric the Sun.


🎼 Coda: The Bamboo Astronomer

There is a quiet music in the life of Pathani Samanta Chandrasekhar — a rhythm that unites observation, devotion, and mathematical beauty. With a bamboo staff as his telescope and palm leaves as his observatory log, he built a universe out of simplicity.

His Siddhanta Darpana is more than a scientific document — it is a song of perseverance, echoing the harmony between intellect and faith. Every calculation he inscribed was a note in this composition; every observation, a beat that connected human curiosity to cosmic truth.

In a time when modern science was becoming mechanised, Samanta’s legacy reminds us that the human spirit of inquiry remains the most essential instrument of all.


🌌 Epilogue: The Endless Orbit

More than a century has passed since that December morning in 1874, when Pathani Samanta measured the shadow of Venus upon the Sun. The instruments he used have perished, but the precision of his mind endures.

In today’s world of digital telescopes and space observatories, his story invites us to look back — not out of nostalgia, but reverence. For it is not only data that defines astronomy, but wonder.

Pathani Samanta Chandrasekhar lives on — in every student who measures the stars with handmade instruments, in every teacher who bridges traditional wisdom with modern science, and in every stargazer who looks upward and whispers: The universe is within reach, if only we dare to observe.


⚖️ Copyright & Attribution

© Dhinakar Rajaram (Original post: 23 November 2011, 00:03).
Revised and expanded edition © 2026.
All rights reserved.

Quotations from Siddhanta Darpana and translations by Arun Kumar Upadhyaya are acknowledged with due respect. Historical data, measurements, and astronomical context sourced from the Indian Institute of Astrophysics (IIA), Bangalore, and the referenced publication:
Pathani Samanta Chandrasekhar — An Astronomer Extraordinaire.

No part of this article may be reproduced without citation or author permission.


🔖  Hashtags

 

#PathaniSamanta #IndianAstronomy #SiddhantaDarpana #OdishaHeritage #VenusTransit #IlaiyaraajaOfTheSkies #IndigenousScience #CelestialIndia #AstronomyInIndia #SkyAndScripture #DhinakarRajaramBlog #CosmicLegacy #BambooAstronomer
 






















 
 



Monday, 7 November 2011

நாட்டின் வளர்ச்சிக்கு தேவை கூடங்குளம் அணுமின் நிலையம்

நன்றி: தினமலர்



கட்டுரை  ஆசிரியர்: பாரத ரத்னா முனைவர் . அப்துல் கலாம் ( முன்னால் இந்திய ஜனாதிபதி மற்றும் இந்திய ஏவுகணைத் தொழில்நுட்பப் தந்தை)






உலக நாடுகளுடன் ஒப்பிடுகையில், நம் நாடு எல்லாத் துறைகளிலும் ஒரு படிக்கு மேல் இருக்க வேண்டும் என்பது தான் நம் ஒவ்வொருவரின் தீராத ஆவல், விருப்பம், எதிர்பார்ப்பு எல்லாம். எல்லோரது ஒத்துழைப்பும் இருந்தால் தான் இது போன்ற சாதனைகளைப் படைக்க முடியும்.
தகவல் தொழில் நுட்பத்தில் அமெரிக்காவையே அசைத்துப் பார்க்கும் நாம், அத்தொழில் நுட்பம் மேலும், தங்கு தடையின்றி தொடர, மின்சாரத் தேவையும் அவசியம் என்பதை உணர வேண்டும். மின் உற்பத்திக்கு தேவைப்படும் பொருட்கள் பற்றாக் குறையாக உள்ள இக்காலகட்டத்தில், அணுசக்தி மூலம் இதனை சரிக்கட்ட முடியும் என்பது விஞ்ஞானிகளின் கூற்று. நல்ல வேளையாக, தமிழகத்தில், கூடங்குளத்தில் அமையவுள்ள அணுமின் நிலையம் மூலம், நமது மின் தேவையை எளிதாக பூர்த்தி செய்து கொள்ளும் ஒரு சந்தர்ப்பம் தற்போது ஏற்பட்டிருக்கிறது. இதனை, நாம் நல்ல முறையில் பயன்படுத்திக் கொள்ள வேண்டும். அணுசக்தி என்றாலே ஏதோ ஒருவித பயம் பலரிடம் குடிகொண்டுள்ளது. ஆனால், எதிர் நீச்சல் போட்டால்தான் வாழ்க்கையில் முன்னேறமுடியும் என்பதை நம்பும் நாம், அதே துணிச்சலுடன் புதிய முயற்சிகளையும் வரவேற்க வேண்டும். பாதுகாப்பான அணு மின் நிலையங்களால் எந்தவிதமான பாதிப்பும் ஏற்படாது என்று பலரும் கூறியுள்ள நிலையில், உண்மை, நேர்மை, தூய்மை ஆகியவற்றின் வடிவமான நம் இந்திய முன்னாள் ஜனாதிபதி அப்துல் கலாமும் இதனையே வலியுறுத்தியுள்ளார். அணுமின் நிலையம் மற்றும் அதுதொடர்பாக அவரது கருத்துக்கள் இதோ....

தமிழகத்திலே உள்ள கூடங்குளத்தில் அமைந்துள்ள 2,000 மெகாவாட் மின்சாரம் உற்பத்தி செய்ய வேண்டி, அணுஉலை செயல்பட தயாராகிக்கொண்டு இருக்கும் நிலையில் அணுசக்தியைப்பற்றியும், அதன் விளைவுகளைப்பற்றியும் நாட்டில் சில விவாதம் நடந்து வரும் இவ்வேளையில், சில உண்மைகளையும், அணுசக்தியின்
நன்மைகளைப் பற்றியும், இயற்கைச்சீற்றங்களினால் அதற்கு ஏற்படும் விளைவுகளைப்பற்றியும், அணுஉலைகளின் நம்பகத்தன்மை மற்றும் பாதுகாப்பு போன்ற விஷயங்களை அறிவார்ந்த முறையில் அணுகி, அதைப் பற்றி ஒரு தெளிவான கருத்தை என் அனுபவத்தோடு, உலக அனுபவத்துடன் ஆராய்ந்து அதை நம் மக்களுடன் பகிர்ந்து கொள்ள விரும்புகிறேன். திருநெல்வேலி மாவட்டத்து மக்கள் அறிவார்ந்த மக்கள், அங்கேயே பிறந்து, அங்கேயே வளர்ந்து, அங்கேயே படித்து, அங்கிருந்து மட்டுமல்லாமல் உலகின் அனைத்து பகுதிகளுக்கும் சென்று தங்களது அறிவாற்றலால் அனைத்து மக்களையும், நாட்டையும் வளப்படுத்தும் மக்கள் தான் திருநெல்வேலியை சேர்ந்த மக்கள். அதைப்போலவே தமிழகம் இன்றைக்கு ஒரு அறிவார்ந்த நிலையில் வளர்ந்து, மாநிலத்தை வளப்படுத்தி, நாட்டை வளப்படுத்தி, மற்ற மாநிலங்களுக்கு எடுத்துக்காட்டாக பல்வேறு திறமைகளில் சிறப்பான மாநிலமாக தமிழகம் திகழ வேண்டிய வளர்ச்சிப்பாதையில் உள்ளது. அப்படிப்பட்ட தமிழகத்தில் திருநெல்வேலி மாவட்டம், இன்னும் ஒரு சில ஆண்டுகளில் இந்தியாவிலேயே வளர்ச்சி அடைந்த மாவட்டமாக மாற ஏதுவான சூழ்நிலை நிலவுகிறது.

அதற்கு முக்கிய அவசியமான கட்டமைப்பு என்ன? அதுதான் மின்சாரம், மின்சாரம், மின்சாரம். எப்படிப்பட்ட மின்சாரம், மக்களை பாதிக்காத, ஆபத்தில்லாத அணுமின்சார உற்பத்திதான் அதன் முக்கிய லட்சியம். இந்தியாவிலேயே ஒரே இடத்திலே 2000 மெகாவாட் மின்உற்பத்தி, இன்னும் சில ஆண்டுகளில் 4000 மெகாவாட் மின் உற்பத்தி அணுமின்சாரம் மூலம் நடைபெற இருக்கிறது என்பது தமிழகத்திற்கு மிகப்பெரிய செய்தி, திருநெல்வேலி மாவட்டத்திற்கு ஒரு அரும் பெரும் செய்தி, இந்தியாவில் இது முதன் முறையாக நடைபெற இருக்கிறது.கிட்டத்தட்ட 20,000 கோடி ரூபாய் முதலீடு திருநெல்வேலி மாவட்டத்திற்கு வர வாய்ப்பு உள்ளது. அது உற்பத்தி செய்யும் மின்சார உற்பத்தியில் கிட்டத்தட்ட 50 சதவீத மின்சாரம் தமிழகத்திற்கு கிடைக்க இருக்கிறது. எனவே வளமான திருநெல்வேலி மாவட்டம், வளமான கூடங்குளம் பகுதி, வலிமையான தமிழகத்தை நாம் அடையவேண்டும். அப்படிப்பட்ட லட்சியத்தை நோக்கி நாம் செல்லும் போது, ஜனநாயக நாட்டில் அணுசக்தி மின்சார உற்பத்தி பற்றி இயற்கையாக பலகருத்துக்கள் ஏற்பட வாய்ப்பு உள்ளது.

அதாவது அணுசக்தி மூலம் மின்சாரம் உற்பத்தி செய்வதற்கு உருவாகியுள்ள எதிர்ப்பை மூன்று விதமாக பார்க்கலாம். ஒன்று கூடங்குளம் பகுதியில் வாழும் மக்களுக்கே ஏற்பட்டுள்ள உண்மையான கேள்விகள், இரண்டாவது பூகோள - அரசியல் சக்திகளின் வர்த்தகப் போட்டிகளின் காரணமாக விளைந்த விளைவு (Dynamics of Geo&political and Market forces),, நாமல்ல நாடுதான் நம்மை விட முக்கியம் என்ற ஒரு அரிய கருத்தை அறிய முடியாதவர்களின் தாக்கம். முதலாவதாக மக்களின் உண்மையான உணர்வுகளுக்கு மதிப்பளித்து அவர்களது நியாயமான சந்தேகங்களை வகைப்படுத்தி, அந்த சந்தேகங்களை நிவர்த்தி செய்வது மிகவும் முக்கியம்.

மக்களின் மற்றும் மக்களின் கருத்தால் எதிரொலிக்கும் கேள்விகளை தெளிவாக்கி அவர்களுக்கு நம்பிக்கையை ஏற்படுத்துவது இரண்டாவது முக்கியம். இந்தியாவின் முன்னேற்றத்தை விரும்பாத, வளர்ச்சியை பிடிக்காதவர்களின் முயற்சியை பற்றியும், அவர்களின் அவதூறு பிரசாரங்களைப்பற்றியும் மத்திய, மாநில அரசுகள் பார்த்துக்கொள்ள வேண்டும்.

எனவே முதலில் மக்களின் கேள்விகள் என்ன? அவர்களின் நியாயமான பயம் என்ன? என்பதை பார்ப் போம்.
1.ஜப்பான் புகுஸிமா அணுஉலை எரிபொருள் சேமிப்பு கிடங்கில் சுனாமியால் கடல் நீர் சென்றதால், ஏற்பட்ட மின்சார தடையால் நிகழ்ந்த விபத்தை தொலைக்காட்சியில் பார்த்த மக்களுக்கு நியாய மாக ஏற்பட்ட பயம் தான் முதல் காரணம்.
2.இயற்கை சீற்றங்களினால் அணு உலை விபத்து ஏற்பட்டால், அதனால் கதிரியக்க வீச்சு ஏற்பட்டால் அப்பகுதி மக்களுக்கு பாதிப்பை ஏற்படுத்தும், அதனால் தைராய்டு கோளாறுகள், நுரையீரல் புற்று நோய், மலட்டுத்தன்மை போன்றவை வரும் என்று மக்கள் மத்தியில் பீதி ஏற்பட்டுள்ளது என்று கூறப்படுகிறது.
3.அணுசக்தி கழிவுகளை சேமித்து வைப்பது ஆபத்து, அணுசக்தி கழிவுகளை கடலில் கலக்கப்போகிறார்கள், அணுசக்தியால் உருவாகும் வெப்பத்தினால் உருவாகும் நீராவியினாலும், அணுசக்தி கழிவை குளிர்விக்க பயன் படும் நீரை மீண்டும் கடலில் கலந்தால் அதனால் மீன் வளத்திற்கு பாதிப்பு ஏற்படும். 500 மீட்டருக்கு மீன் பிடித்தலுக்கு தடை விதிக்கப்படும், அதனால் மீனவர்களின் வாழ்வாதாரம் பாதிக்கப்படும், என்ற பயம் நிலவுகிறது.
4.அணு உலையில் எரிபொருள் மாதிரியை இரவில் நிரப்பும் பொழுது வழக்கமாக ஏற்படும் சத்தத்தால் மக்கள் மத்தியில் பீதி ஏற்பட்டு விட்டது.
5.அணு உலையில் இயற்கைச் சீற்றத்தாலோ, கசிவாலோ விபத்து ஏற்பட்டால், உடனடியாக அப்பகுதி மக்கள், 90 கிலோ மீட்டர் தூரம் 2 மணி நேரத்திற்குள் வெளியேற்றப்
படவேண்டும் என்று சொல்கிறார்கள், சோதனை ஓட்டம் செய்து பார்க்கும் போது மக்களை உடனடியாக வெளியேற சொன்னதனால் மக்களுக்கு பயம் ஏற்பட்டு விட்டது. ஒருவேளை விபத்து நேர்ந்தால், சரியான சாலை வசதி, போக்குவரத்து வசதி இல்லாத நிலையில் , மக்கள் கதிர்வீச்சு ஆபத்து ஏற்பட்டால் தப்புவதற்கு போதுமான பாதுகாப்பு வசதிகள் செய்து தரப்படவில்லை, மக்கள் எப்படி தப்ப முடியும்.
6.10,000 பேருக்கு வேலை வாய்ப்பு செய்து தரப்படும் என்று கூறினார்கள், ஆனால் அந்த பகுதியை சேர்ந்த 35 பேருக்குத்தான் வேலைவாய்ப்பு தரப்பட்டுள்ளது, ஏன் வேலை வாய்ப்பை அளிக்கவில்லை
7.பேச்சிப்பாறை அணையில் இருந்து தண்ணீர் வரும் என்று சொன்னார்கள், கடல் நீரை சுத்திகரித்து நல்ல தண்ணீர் கிடைக்கும் என்று சொன்னார்கள், இரண்டும் கிடைக்கவில்லை.

இது போன்று பல்வேறு கேள்விகள் மக்கள் மனதில் ஏற்பட்டுள்ளன, சரியான கேள்விகளும் உண்டு, மிகைப்படுத்தப்பட்ட கேள்விகளும் உண்டு ஆனால் இந்த கேள்விகளுக்கு சரியான பதிலை தரவேண்டிய பொறுப்பு மத்திய அரசுக்கு உண்டு. மக்களின் மனதில் பய உணர்வை ஏற்படுத்திவிட்டு எவ்வித விஞ்ஞான முன்னேற்றத்தையும் மக்களுக்கான முன்னேற்றத்திற்கான வழியாக ஏறெடுத்துச்செல்ல முடியாது என்பதை முதலில் நாம் புரிந்து கொள்ளவேண்டும்.அணுசக்தி துறையோடு எனக்கு இருந்த 20 வருட அனுபவத்தின் காரணமாகவும், அணுசக்தி விஞ்ஞானிகளோடு எனக்கு இருந்த நெருக்கமான தொடர்பாலும், சமீப காலங்களில் இந்தியாவிலும், அமெ ரிக்கா, ரஷ்யா போன்ற நாடுகளிலும் அணுசக்தி, துறையை சேர்ந்த ஆராய்ச்சி நிலையங்களுக்கு சென்று அங்கு பணிபுரியும் விஞ்ஞானிகளுடனும், தொழில் நுட்ப வல்லுனர்களுடனும் கலந்துரையாடிய அனுபவத்தாலும், கடந்த 4 வருடங்களாக இந்திய கடற்கரை ஓரம் அமைந்துள்ள எல்லா அணுதி உற்பத்தி நிலையங்களுக்கும் சென்று, அந்த அணுசக்தி நிலையங்களின் உற்பத்தி செயல் திறனை பற்றியும் அதன் பாதுகாப்பு அம்சங்களை பற்றியும் மிகவும் விரிவாக ஆராய்ந்துள்ளேன்.

அதுமட்டுமல்ல கூடங்குளம் அணுமின் நிலையத்தையும் பார்வையிட்டு அதன் பாதுகாப்பு அம்சங்கள் பற்றியும் பல்வேறு காரணிகளைப்பற்றியும் அதாவது கடலோரத்தில் உள்ள இந்திய அணுமின் சக்தி நிலையங்களுக்கும் மற்ற நாடுகளில் உள்ள அணுமின் நிலையங்களுக்கும் என்ன வித்தியாசம், அதன் ஸ்திர தன்மை, பாதுகாப்பு தன்மை பற்றியும், இயற்கை பேரிடர் மற்றும் மனித தவறின் மூலம் ஏதேனும் விபத்து ஏற்பட்டால், அதை எப்படி சரி செய்ய முடியும் அதன் தாக்கத்தை சமன் செய்ய செய்யப்பட்டுள்ள மாற்று ஏற்பாடுகள் பற்றியும், செய்ய வேண்டிய பாதுகாப்பு நடவடிக்கைகள் பற்றியும் விரிவாக ஆலோசனை நடத்தியுள்ளேன். அத்துடன் என்னுடைய இருபதுக்கும் மேற்பட்ட வெளிநாட்டு பயணத்தின் போதும், ஆராய்ச்சி நிலையங்களிலும், கல்வி போதிக்கும் என்னுடைய பணி மூலமாகவும் செய்த ஆராய்ச்சிகளின் விளைவாக வும், அணுசக்தியைப்பற்றியும், எரிசக்தி சுதந்திரத்தைப்பற்றிய அறிவியல் சார்ந்த விளக்கங்களையும் ஆராய்ச்சி விளக்கங்களை விரிவாக விவாதித்தோம். அதன் விளைவாக நான் எனது நண்பர் தி. பொன்ராஜ் அவர்களுடன் சேர்ந்து இந்தியா

2030க்குள் எரிசக்தி சுதந்திரம் பெற எந்த அளவிற்கு அணுசக்தி முக்கியம் என்பதை பல மாதங்கள், தொடர்ச்சியாக ஆராய்ச்சி செய்ததன் பயனாக இந்த ஆராய்ச்சி கட்டுரையை ஆய்வின் முடிவுகளின் விளக்கத்தை மக்களுக்கு தெரிவிக்க நாங்கள் கடமைப்பட்டிருக்கிறோம். இந்த ஆய்வின் முடிவுகளையும், என்னுடைய கருத்தையும் பார்ப்பதற்கு முன்பாக உங்களுடன் ஒரு விஷயத்தை பகிர்ந்து கொள்ள விரும்புகிறேன்.

அதாவது, கரிகாலன் முடியாது என்று நினைத்திருந்தால் தமிழ்நாட்டில் கல்லணை கிடையாது. காட்டாற்று வெள்ளமென வரும் அகண்ட காவிரியை தடுத்து நிறுத்த அந்தக்காலத்து தொழில் நுட்பத்தை பயன் படுத்தி முதல் நூற்றாண்டில் (1Century AD) கல்லணை கட்டினானே கரிகாலன். எப்படி முடிந்தது அவனால், வெள்ளமென வரும் காவிரியால் கல்லணையை உடைந்து மக்களின் பேரழிவுக்கு காரணமாகிவிடும் என்று நினைத்திருந்தாலோ, பூகம்பத்தால் அணை உடைந்து விடும் என்று கரிகாலன் நினைத்திருந்தாலோ கல்லணை கட்டியிருக்க முடியாது. ஆயிரம் ஆண்டுகளாகியும் நம் கண்முன்னே சாட்சியாக இருக்கிறதே ராஜ ராஜ சோழன் கட்டிய தஞ்சை பெரிய கோவில். சுனாமியினால் கடல் கொண்டு அழிந்த பூம்புகார் போன்று, பூகம்பத்தின் காரணமாக, பெரிய கோவில் அழிந்து விடும் என்று நினைத்திருந்தால், தமிழர்களின் மாபெரும் கட்டிட கலையை உலகிற்கே பறைசாற்றும் விதமாக, எடுத்துக்காட்டாக இருக்கும் பெரிய கோவில் நமக்கு கிடைத்திருக்குமா.ஹோமி பாபா முடியாது என்று நினைத்திருந்தால், கதிரியக்கம் மக்களைப் பாதித்திருக்கும் என்று நினைத்திருந்தால், இன்றைக்கு 40 ஆண்டுகளாக பாதுகாப்பான அணுமின்சாரத்தை 4700 மெகாவாட் மின்சாரத்தை உற்பத்தி செய்திருக்க முடியாது, மருத்துவத்துறையிலே கேன்சர் நோயால் அவதிப்படும் மக்களுக்கு ஹீமோதெரெபி அளித்திருக்க முடியாது, விவசாயத்தின் விளைபொருளின் உற்பத்தியை பெருக்கி இருக்க முடியாது. உலக நாடுகளே இந்தியாவை மதிக்கும் வண்ணம் அணுசக்தி கொண்ட ஒரு வலிமையான நாடாக மாற்றியிருக்க முடியாது. எனவே முடியாது என்று நினைத்திருந்தால், ஆபத்து என்று பயந்திருந்தால் எதுவும் சாத்தியப்பட்டிருக்காது.

ஏன் கதிரியக்கத்தை முதன் முதலாக பிட்ச் பிளன்ட் (two uranium minerals, pitchblende and torbernite (also known as chalcolite).) என்ற உலோகத்தை தன் தலையில் சுமந்து அதை பற்றி ஆராய்ச்சி செய்து கண்டுபிடித்தாரே மேடம் மேரி க்யூரி. தனக்கே ஆபத்து அதனால் வரும் என்று தெரிந்தும் ஆராய்ச்சியின் நல்ல பயன் உலகத்திற்கு செல்ல வேண்டும் என்று, தொடர்ந்து ஆராய்ச்சி செய்து முதன் முதலாக கதிர்வீச்சிற்கு வேதியலிலும், கதிர்இயக்கத்திற்கு இயற்பியலிலும் 2 நோபல் பரிசைப்பெற்று, அந்த கதிரியக்கத்தாலேயே தன் இன்னுயிரை இழந்தாரே. அதுவல்லவா தியாகம்.

தன்னுயிரை இழந்து மண்ணுயிரை காத்த அன்னையல்லவா மேடம் க்யூரி. இன்றைக்கு அந்த கதிரியக்கத்தால் எத்தனை கேன்சர் நோயாளிகள் ஹீமோதெரபி மூலம் குணப்படுத்தப்படுகிறார்கள், விவசாயத்திற்கு தேவையான விதைகளை கதிரியக்கத்தினை பயன்படுத்தி அதன் விளைச்சலை அதிகரிக்க முடிகிறதே. இன்றைக்கு அணுசக்தியினால் உலகம் முழுதும் 4 லட்சம் மெகாவாட் மின்சாரம் உற்பத்தி செய்யப்படுகிறதே. அதே போல் அணுசக்தியில் யாருக்கும் நாம் சளைத்தவர்கள் இல்லை என்று சாதித்து காட்டினோமே, அந்த வழியில் நண்பர்களே முடியாது என்று எதுவும் இல்லை.

முடியாது, ஆபத்து, பயம் என்ற நோய் நம்மிடம் பல பேரிடம் அதிகமாக உள்ளது. அப்படிப்பட்ட இயலாதவர்களின் கூட்டத்தால், உபதேசத்தால் வரலாறு படைக்கப்பட வில்லை. வெறும் கூட்டத்தால் மாற்றத்தை கொண்டுவர முடியாது. முடியும் என்று நம்பும் மனிதனால் தான் வரலாறு படைக்கப்பட்டு இருக்கிறது, மாற்றம் இந்த உலகிலே வந்திருக்கிறது. இந்தியா வல்லரசாகும் என்று தவறான கருத்து பரப்பப்படுகிறது, வல்லரசு என்ற சித்தாந்தம் என்றோ போய்விட்டது. 2020க்குள் இந்தியா வளர்ந்த நாடாக மாற வேண்டும் என்பது தான் நம் மக்களின் லட்சியம்.



Sunday, 6 November 2011

Nuclear power is our gateway to a prosperous future - A.P.J Abdul Kalam & Srijan Pal Singh

Courtesy: The Hindu.
Online link: http://www.thehindu.com/opinion/op-ed/article2601471.ece
Published in print edition of The Hindu Open page as a special Essay on 06/11/2011


'Economic growth will need massive energy. Will we allow an accident in Japan, in a 40-year-old reactor at Fukushima, arising out of extreme natural stresses, to derail our dreams to be an economically developed nation?'

Every single atom in the universe carries an unimaginably powerful battery within its heart, called the nucleus. This form of energy, often called Type-1 fuel, is hundreds of thousands, if not millions, of times more powerful than the conventional Type-0 fuels, which are basically dead plants and animals existing in the form of coal, petroleum, natural gas and other forms of fossil fuel. To put things in perspective, imagine a kilometre-long train, with about 50 freight bogies, all fully laden with the most typical fossil fuel — about 10,000 tonnes of coal. The same amount of energy can be generated by 500 kgi of Type-1 fuel, naturally occurring Uranium, enough to barely fill the boot of a small car. When the technology is fully realised, one can do even better with naturally occurring Thorium, in which case the material required would be much less, about 62.5 kg, or even less according to some estimatesii, and thus enough to fit in a small bagiii. (Note: 500 kg of naturally occurring Uranium would contain about 3.5 kg of Uranium-235 fuel.)
Energy and economy
Energy is the most fundamental requirement of every society or nation as it progresses through the ladder of development. Of course, once it reaches a relative degree of development, the energy demand becomes more stable. There is a distinct and categorical correlation between the energy consumption and income of a nation — each reinforcing the other. Look around you: every step into progress comes with an addition of demand for energy — cars, ships and aircraft to move, hospitals to give quality healthcare, education, as it follows the model of e-connectivity, production of more and better goods, irrigation for better farming. In fact, every element of our lives is increasingly going to become energy-intensive — that is a necessary prerequisite for development. This is clearly reflected in the average energy consumption per person across nations — for instance, an average American consumes more than 15 times the energy consumed by an average Indian (see Figure 1)iv
Today, India finds itself going through a phase of rapid ascent in economic empowerment. Industries are evolving at a significantly higher rate since liberalisation. Our focus for this decade will be on the development of key infrastructure and the uplifting of the 600,000 villages where 750 million people live, as vibrant engines of the economy. In 2008, we crossed the trillion-dollar mark, and it took more than six decades for us to reach that milestone. However, it is predicted that the Indian economy will double again, to reach the $2-trillion mark by 2016, and then again redouble, to reach the $4 trillion milestone by 2025v. All this economic growth will need massive energy. It is predicted that the total electricity demand will grow from the current 150,000 MW to at least over 950,000 MW by the year 2030vi — which will still be less than one-fourth of the current U.S. per capita energy need. In fact, by 2050, in all likelihood the demand could go even higher, and the per capita energy demand would be equal to the current French or Russian figure of about 6000 W per capita.
Analysing the international scenario on nuclear energy
So, will we allow an accident in Japan, in a 40-year-old reactor at Fukushima, arising out of extreme natural stresses, to derail our dreams to be an economically developed nation? When a few European countries, particularly Germany, decide to phase out nuclear power, that should not become a blanket argument to take a view against our nuclear programme.
A few things need to be put in context here. The decision of Germany suits its current scenario which goes beyond mere concerns of risk posed by nuclear power. Germany is a developed nation, a power-surplus nation — so it can afford to lose a few plants. More important, Germany has completely exhausted its nuclear resources. Against a total demand of 3,332 tonnes (2006-08)vii it was able to produce only 68 tonnes (Note: This was the production in 2006) of Uranium, and for the deficit it was relying on importsviii. Thus, nuclear energy never fits into its goal of energy independence. India, on the other hand, is the leader of the new resource of nuclear fuel called Thorium, which is considered to be the nuclear fuel of the future.
The Indian population is misled when it is said that some Western nations have ended their nuclear programme, or that Japan is reconsidering nuclear power plant expansion. Study the accompanying Table


which shows what share of energy these advanced nations are generating by means of nuclear power. 
 
The study indicates that most of the prosperous nations are extracting about 30-40 per cent of power from nuclear power and it constitutes a significant part of their clean energy portfolio, reducing the burden of combating climate change and the health hazards associated with pollution. Meanwhile in India, we are not generating even 5000 MW of nuclear power from the total of about 150 GW of electricity generation, most of it coming from coal.
We should be careful not to be carried away by the barrage of anti-nuclear news often being generated by many of the same nations that are enjoying the maximum benefits from it. The economically developed world has a well-trained habit of presenting their success in a distorted context to misguide emerging nations like India, which are a potential challenge to their neo-age proxy-imperial economic subjugation. What is needed for our India, we Indians have to decide.
Hence, we and we alone will decide what is the best needed action for our economic prosperity, based on our context and resource profile. India is blessed with the rare, and very important, nuclear fuel of the future – Thorium. We cannot afford to lose the opportunity to emerge as the energy capital of the world, which coupled with the largest youth power, will be our answer to emerge as the leading economy of the world. India has the potential to be the first nation to realise the dream of a fossil fuel-free nation, which will also relieve the nation of about $100 billion annually which we spend in importing petroleum and coal. Besides the billions spent on importing coal or oil, we are also importing millions of tonnes of CO2 and other greenhouse gases, which are a hazard to the environment and human health. It is noteworthy that in 2010-11, India imported about 82 billion tonnes of coalxii, a large fraction of which was for the thermal power plants. Experts believe that this number will continue to rise exponentially in the times ahead, as shown in Figure 3xiii.
The greenest sources of power are definitely solar and wind. With abundant sunshine and places of high wind velocity, the nation definitely has potential for these forms of energy. But solar and wind power, despite all their advantages, are not stable and are dependent excessively on weather and sunshine conditions. Nuclear power, on the other hand, provides a relatively clean, high-density source of reliable energy with an international presence. Today, there are 29 countries operating 441 nuclear power plants, with a total capacity of about 375 GW(e). The industry now has more than 14,000 reactor-years of experience. Sixty more units, with a total target capacity of 58.6 GW, were under construction. (Note: This is according to data from 2010.)
Much of the destructive power of nuclear accidents is compared against the benchmarks of the atomic bombing of Japan by the U.S. forces during the Second World War. Pictures of mushroom clouds looming over cities, charred buildings, and massive death scenes are awakened to form our opinion of nuclear dangers and disasters. But that is far from the reality. It is poor judgment and a deliberate act of spreading fear to compare a nuclear bomb with a nuclear plant. The bomb is designed to deliver a large amount of energy over a very short period of time, leading to explosions, firestorms and massive heat energy generated to obliterate every object in its path. That is what a bomb is supposed to do!
Civilian nuclear applications in the form of a power plant, on the other hand, are designed to deliver small amounts of energy in a sustainable manner over a far larger time frame. It is designed with systems to control and cool the nuclear reaction. There are safety procedures and back-ups, and even in the event of failures, as in the 2011 disaster, the destructive might will never be even a fraction of what happens in the case of a nuclear bomb.

Nuclear risks

We need to put the Fukushima-Daiichi events in the historic frame of nuclear accidents and analyse them. While there was huge loss to property and disruption of normal life, there was no direct loss of life due to the accident or during the operation in its aftermath to contain it. As a silver lining, the way the accident was handled — compared to the Chernobyl disaster of 1986 — showed how much progress we have achieved in nuclear emergency management over a period of two and half decades. The Fukushima-Daiichi plant was almost five times as big in terms of power generation and, more significantly, contained about nine times the nuclear fuel at the time of the accident. Yet, with better emergency management learnt over the years, the maximum radiation was less than 0.4 per cent of that released during the Chernobyl disaster. So, while the Fukushima-Daiichi accident was unfortunate and needs review, one must also acknowledge the advancement of national and international capabilities to manage nuclear emergencies now.
Another argument which surrounds the nuclear debate is that nuclear accidents and the radiation fallout as the aftermath would not only harm the exposed generation but also continue to impact generations to come. If available facts and scientific inquiry was given more weightage than mere conjectures and comic-bookish imagination, this argument will in all probability be proved a myth. The strongest case of human exposure and destruction due to radiation is, without argument, the Hiroshima and Nagasaki nuclear bombings of 1945. These are the only two occasions when nuclear force was intentionally developed and deployed to kill human life. Post the bombing, the U.S. government established the Atomic Bombing Casualty Commission (ABCC) in 1946 to assess the late-effects of radiation among the atomic bomb survivors of Hiroshima and Nagasaki. It operated for 30 years until, in 1974, it was reconstituted as a joint venture between the U.S. and Japan under the name of Radiation Effects Research Foundation (RERF). It is operational even today. The ABCC and the RERF have extensively studied the long-term impact of radiation and nuclear disaster across generations for over six decades now, and the findings throw light on the possible effects of radiation. Its report says that chronic (sustained) exposure of about 100 millisieverts (mSv, which is the international unit to measure radiation), increases cancer risk by 0.5 per cent to 0.7 per cent. Notably, the areas in close proximity of Fukushima had a peak exposure of 800 mSvxiv

The Kudankulam atomic power project during construction


Of course, there is some correlation between radiation exposure and cancer risk, which must be acknowledged. But the notable aspect is that, contrary to popular belief, the findings clearly state that the effect of such exposure is limited only to the exposed generation. To quote the report, “Our studies have not found thus far any inherited genetic effects from parental radiation exposure among the children of A-bomb survivors.”xv (Note: A-bomb stands for the atom bomb. Two atomic bombs were dropped by the U.S. on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9, 1945, as part of the Second World War.) Thus, while radiation due to a nuclear disaster is dangerous, it would amount to wrong propaganda to state that nuclear disasters will affect generations to come. Of course, the technology has been advancing over the decades and the human capability to contain nuclear disasters has definitely advanced.
There is no doubt that nuclear power is superior along three dimensions, namely, energy density, effect on improved quality of living, and the economic benefits. Now let us look at the key challenges which pertain to the sector, especially in the wake of the recent natural disaster impacting the Daiichi plant in Fukushima. Two concerns are prominent here. The first is that of safety against the plant's disaster, and the second relates to the environmental impact and the nuclear waste which the plant generates.
Let us consider the second issue first.
Opportunity cost of nuclear energy
a) Abstinence from nuclear power is an incomplete response without the logical alternative. If we look at the complete picture of alternative measures, we will have to endorse the fact that our current and future energy demands have to be met. In economics, there is a concept called “opportunity cost,” which refers to the cost incurred when one chooses the next alternative. So what happens if we pronounce a total ban on nuclear energy generation? Some part of the future need, although only a small fraction, would come from solar and wind sources, with great unpredictability as pointed out earlier. A part would be offset by hydro-power too. But in all probability we will continue to increase our reliance on fossil-based fuel power generation methods, at least in the near and mid-term future. And that is where the problem lies.
Every year, human activities are adding about 30 billion tonnes of CO2 xvi into the atmosphere. The IPCC estimates that 26 per cent of this emission (about 7.6 billion tonnes) is a direct consequence of electricity generation requirements. This is not really air pollution but it adds to the risk of climate change, which is exhibited in changing rainfall patterns, sea levels and temperatures, leading to food shortages, malnutrition, and disease alterations. The WHO estimates that about 1.3 million peoplexvii lose their lives as a result of urban outdoor air pollution alone, and about 140,000 are causalities to adaptation challenges of climate changexviii. (Note: Additionally, about two million lives are lost due to indoor pollution, the primary victims being women, and children under the age of five.) Thus, the pollution caused by power generation activities, and the climate change associated with them, are directly or indirectly responsible for about 481,000 deaths every year. Comparatively, in the case of the worst civilian nuclear disaster ever at Chernobyl, the United Nations Scientific Committee on the Effects of Atomic radiation (UNSCEAR) predicted up to 4,000 cancerxix cases (often curable) due to the accident, besides 57 direct causalities. Unclean fossil energy is definitely not sustainable in the future. Moreover, fossil-based fuels are fast depleting, and their scarcity is inspiring geopolitical instabilities around the world.
Furthermore, it is believed that the changing climate patterns will carry a costly adaptation price tag in the future — an enormous $300 billion every year, which will be a huge drain on the global GDPxx. All these issues can be addressed only when we graduate from Type-0 fuels to the next-generation fuels — the most prominent amongst them being nuclear fuels, which will also power our deep space missions of the future. A standard approximate comparison between a 1000-MW coal plant and a similar nuclear plant is given in Table 6.
Safety issues of nuclear power
b) Now, let us delve more into the other issue — that of plant safety. Throughout the history of nuclear power generation there have been four major incidents of plant failure — the Kyshtym accident in fuel reprocessing in 1957, the relatively smaller Three Mile Island meltdown (United States), the much bigger Chernobyl accident (USSR, 1986) and the recent Japanese incident at Fukushima. The first accident was purely due to underdeveloped technology, and much of the blame for the next two disasters is attributed to human error. Even in the case of the Fukushima disaster of 2011, there were extraordinary natural forces in action — the rare occurrence of the tremendous stress load of an earthquake coupled with the unprecedented shear load of a tsunami. Of course, there is a need for better technology and more stable plant design across the world, but the occurrence of four failures in six decades cannot be made out as a case for completely disbanding the technology — which is one of our foremost keys to graduating beyond the fossil fuel-based low-end energy. The best of technological progress, while being the biggest ally of mankind, does come at an incremental risk. The key is to learn and evolve to mitigate the risk, rather than use the first incident as an excuse to disband science.
Let us take a few examples. In 1903, the Wright brothers translated into reality the remarkable dream of controlled human flight. Not more than half a decade later, in 1908, the first flight disaster occurred, which severely injured Orville Wright and killed his co-passenger. Many accidents followed, and even today air accidents kill more than 1,500 people every year. Imagine whether we would be flying between distant cities, across oceans and continents, if the incident of 1908, or the ones later, were used as a reason to disband human flight? When the mighty ship Titanic set sail in 1912, it was heralded as the pioneering mission in the field of large and comfortable ocean liners. But on its first voyage it struck an iceberg and sank, killing more than 1,500 people, more than two-thirds of those on board. But that never stopped our quest for bigger and faster means of ocean travel. The very first attempt to send man to the moon, Apollo-1, met with an accident and killed three prominent astronauts. It took another 10 missions, with mixed results, before Apollo-11 finally made it to the moon in 1969, with Neil Armstrong setting foot on the lunar surface and declaring to the world those never-to-be-forgotten words: “One small step for man, one giant leap for mankind.” Indeed, that small step was preceded by many a stumble.
The Indian space programme, which is now ranked among the best in the world, started with a failure in 1979 when our first rocket, instead of putting the satellite into a near-earth orbit, went into the Bay of Bengal. I was the Mission Director of the launch, and we were accused of putting a few crores of rupees into the sea. We did not wind up our dreams with that one accident and the criticism. The mission continued and the next year we were successful. Today, that programme, which started with a failure, is the first and only one to discover the presence of water on the moon with its Chandrayan mission, and is now a pride of the nation. The argument is, of course, that all failures and accidents propel us to think and develop better and safer technologies towards better service. And in the case of nuclear power, we do acknowledge that the effects of radiation can reach a wider impact zone. But then, improvement, and not escapism, should be our step forward.
Nuclear fuel of the future: Thorium
Let us introduce a lesser-known member among radioactive materials — Thorium. It is perhaps the best solution possible in the future and would be technologically and commercially the best option in another two decades. Thorium, the 90th element in the Periodic Table, is slightly lighter than Uranium. Thorium is far more abundant, by about four timesxxvi, than the traditional nuclear fuel, Uranium, and occurs in a far purer form, too. It is believed that the amount of energy contained in the Thorium reserves on earth is more than the combined total energy that is left in petroleum, coal, other fossil fuels and Uranium, all put together. And information revealed in an IAEA Report (2005) on Thorium fuels indicates that India might have the largest reserves of Thorium in the world, with over 650,000 tonnes. (Note: The IAEA, the International Atomic Energy Agency, is the world's centre of cooperation in the nuclear field. It was set up in 1957 as the world's ‘Atoms for Peace' organisation within the U.N. family.) This is more than one-fourth of the total deposits of Thorium; in comparison, we have barely 1 per cent of the world's Uranium deposits, which is currently being put to effective use, our having opted for the closed fuel cycle technology. Thorium has many other advantages. It is estimated that Thorium may be able to generate (through Uranium-233 that could be produced from it) eight times the amount of energy per unit mass compared to (natural) Uraniumxxvii. In the much debated issue of waste generation also, Thorium has a relative advantage. It produces waste that is relatively less toxic due to the absence of minor actinides (that are associated with Uranium).
At the same time, it is acknowledged that the long-lived high-level waste from Uranium, especially in light of the Indian strategy of adopting the closed fuel cycle involving reprocessing for the recovery of Plutonium and Uranium, can be effectively managed using technologies available today. Indian nuclear experts tell us that the relatively small volumes of such waste (long-term storage space of less than a quarter of the size of a football field is adequate for the estimated waste from a 1000 MWe plant) can be safely stored after vitrification for hundreds of years without causing any risk to the environment or the people.
One question that crops up is, why then has Uranium rather than Thorium become the popular choice for nuclear energy programmes across the world? There are two reasons: one is technological and the other is historical.
The technological reason stems from the simple fact that at first one needs to produce Uranium-233 from Thorium, and for this, reactors based on the naturally available nuclear fuel material, Uranium-235, are required. In addition, the recovery of Uranium-233 by large-scale reprocessing of irradiated thorium, as well as the likely presence of hard gamma emitting Uranium-232, pose certain practical hurdles. But according to experts, all these can be overcome technologically.
The second and the historical reason why Thorium has lagged behind in the ladder of development, comes from its advantage of being able to provide Thorium-based fuel, as seen from the context of the relatively unstable geopolitical conditions — which is that Thorium cannot be weaponised. Unlike Uranium, which is always on a tight-rope walk between being a power source and finding destructive applications, Thorium bombs just cannot be made. Here history steps in. It must be remembered that much of the current civil nuclear applications are direct offshoots of the military nuclear technologies of the Cold War period. So, the first significant outcome of nuclear technology was the Manhattan Project during the Second World War, which ultimately culminated in the Hiroshima and Nagasaki bombing of 1945 by the U.S.
A nuclear weapon is different from a nuclear plant, as in the former there is no need to control or slow down the reactions that lead to a catastrophic energy release in a short time interval — which is the essence of a bomb. However, a nuclear plant needs moderation of the reaction to sustain a steady but controlled release of energy. It was only by the end of 1951 that some noteworthy work was done in controlled nuclear power generation at the EBR-1 experiment in Idaho to produce 100 KW of nuclear power. This “weapon first” approach to nuclear technology led to the fact that there was little focus on developing methods to energise from Thorium, which is non-weaponisable, and a larger focus on Uranium, which can be weaponised.
But now, being the largest owner of Thorium, and also being amongst the nations which will see the highest surge in power demand with its growth, the opportunity is for India to pursue its existing nuclear programme with a special focus on research and development on the Thorium route as the long term sustainable option, which we are already undertaking. For this purpose, it is imperative to continue to implement the current Indian plan of making use of the uranium and plutonium-based fuel cycle technologies as well as irradiate larger amounts of Thorium in fast reactors to breed Uranium-233 fuel as it graduates to the Thorium-based plants. It is noteworthy that the Indian plan for an advanced heavy water reactor (AHWR) is an important step to launch early commencement of Thorium utilisation in India, while considerable further efforts to use Thorium in both thermal and fast reactors would be essential to harness sustainable energy from Thorium-generated Uranium-233.
Various technologies for Thorium-based plants are already being developed and deployed on a test basis across the world including in India, which have a promising future. These include first breeding it to fissile Uranium-233 isotope in the conventional reactors or through the revived interest in technologies like the Molten Salt Reactors (MSR) which use salts to trap the fissile material and do not react with air or burn in air or water. In this technology, the operational pressure is near the ordinary atmospheric pressure, and hence the cost of construction is low and there is no risk of a pressure explosionxxviii.
A significantly large quantity of highly active nuclear material exists, and will continue to exist in the form of nuclear armaments — which was the mother programme of the nuclear energy programme. In 2010, there were about 22,000 nuclear warheads spanning at least nine countries of the world, and 8,000xxix of them are in active state, carrying a risk far greater than controlled nuclear power reactors. If the argument of risk is to be used to eliminate the peaceful energy generation programme, then the nuclear opposition factions must first direct their efforts at Washington and Moscow, the owners of 90 per cent of the world's nuclear warheads, to disband their nuclear arsenal — which is, by design, intended to be hostile. Would that happen? Unlikely, at least in the foreseeable future. Our aim should be to minimise the risks associated with nuclear power.
The power of the nucleus is mighty and the future of humanity lies in harnessing it in a safe and efficient manner. In the years to come, it will fuel not only our earth-based needs but also our space missions and perhaps even our civilisation's reach to other planets for habitation. Our current nuclear projects will expand into better and safer materials, like Thorium, and later on, into better reactions like fusion, which once completely developed, will be able to generate hundreds of times more of power than current fission methods. Affordable, clean and abundant energy provided by nuclear sources is our gateway to a future that is healthy, learned and connected — a future that will span deep into space and crosses the boundaries of current human imagination. 

Plant insulated from danger of ‘hydrogen explosion' that occurred at Fukushima

Coalfields and burning earth
The Jharia coalfields in Jharkhand constitute the richest coal-bearing area in the country: they contain large quantities of high-grade coking coal. But the presence of this natural resource has been a curse for the local tribal villagers. The Jharia area also has a large number of ongoing mine fires, which have a history of more than a century and have been causing great loss to life and property.
I am reminded of an incident that happened when I was President of India. I was travelling from Sindri to Dhanbad. Hundreds of villagers rushed to my car. We immediately stopped and listened to them. They narrated the heating and spot-fire which regularly take place near their houses. A major challenge to the mining community is that of tackling fires, which have engulfed large and densely populated coal-bearing areas. I and my team visited their houses, where we discovered intense, unbearable heat, emanating not from the skies but the ground below. Occasionally, jets of flames would spurt out from the ground, scorching the earth.
The entire area has been destroyed by the mining activity and rendered uninhabitable for humans or any other life form. Sadly, it can never be restored, at least not for the next million years. Much of the coal mined today is used for electricity generation across the world, and there are many more Jharias being created across the rural and forest lands of earth. These will continue to swell in numbers and size — unless we find sustainable alternative fuel sources to replace fossil fuels.
Pollution, outdoor and indoor
Urban Outdoor Pollution (UOP): It refers to the air pollution experienced by people living in and around urban areas, generally in open space, for example, roads.

Indoor Air Pollution (IAP) refers to pollutants found indoors, generally due to inefficient fuel consumption, chemical pollution to building material, and so on. UOP contributes to IAP. Nearly two million lives are lost due to Indoor Air Pollution, the most common victims being women, and children under the age 5.
Endnotes
ii Thorium as a Secure Nuclear Fuel Alternative, A Canon Bryan, 23-April-2009, Journal of Energy Security (available at http://www.ensec.org/index.php?option=com_content&view=article&id= 187:thorium-as-a-secure-nuclear-fuel-alternative&catid= 94:0409content&Itemid=342)
iii Steve Kirsch, The Most Important Investment that We Aren’t Making to Mitigate the Climate Crisis, 26.12.2009 Huff Post Green, (http://www.huffingtonpost.com/steve-kirsch/the-most-important-invest_b_402685.html)
iv Data from World Resources Institute (for 2003)
v India and China, Raghav Behal
vi India envisages about 950,000 MW power requirement by 2030, http://bit.ly/vTv5Qx
vii “World Nuclear Power Reactors 2006-08 and Uranium Requirements.” World Nuclear Association. 2008-01-14.
viii “World Uranium Production U3O8/ million lbs.” Ux Consulting Company, LLC
ix World Nuclear Power Reactors & Uranium Requirements, World Nuclear Association (21 October 2011) (available at http://www.world-nuclear.org/info/reactors.html) Data is for 2010
x Nuclear Power Plant Information, IAEA PRIS (2010), available at http://www.iaea.org/cgi-bin/db.page.pl/pris.nucshare.htm
xi International Monetary Fund, 2010
xii India 2011/12 coal import needs may jump to 114 mln T, Reuters, September 27, 2011
xiii Rise of the Coal Bill, RN Bhaskar, Forbes India Magazine (April 2010)
xiv Matters elucidated thus far by RERF studies, http://www.rerf.or.jp/rerfrad_e.pdf
xv Matters elucidated thus far by RERF studies, http://www.rerf.or.jp/rerfrad_e.pdf
xvi IPCC Reports on climate change
xvii Air quality and health, Fact Sheet, WHO (http://www.who.int/mediacentre/factsheets/fs313/en /index.html)
xviii Climate Change and Health, WHO 2010, http://www.who.int/mediacentre/factsheets/fs266/en/
xix “UNSCEAR assessment of the Chernobyl accident.” Unscear.org.
xx Climate change fight to cost $300 billion a year, Alister Doyle (12-August-2009), OneWorld (available at http://southasia.oneworld.net/globalheadlines/climate-change-fight-to-cost-300-billion-a-year)
xxi How Coal Works, Union of Concerned Scientists (available at http://www.ucsusa.org/clean_energy/coalvswind/brief_coal.html)
xxii Each kg of coal generates about 2.93 kg of CO2
xxiii Considering the following calculations. About 30,000 million tons of CO2 is responsible for the casualties of about 1.3 million lives per year. (1 billion ton = 1000 million ton). Thus, 1 MT corresponds to about 43.33 causalities per year. And 8.37 million tons would be responsible (by interpolation) for about 362 lives being lost.
xxiv Similar to the above derivation
xxv Based on the eight fold mass to energy advantage we have earlier cited from the article: Thorium as a Secure Nuclear Fuel Alternative, A Canon Bryan, 23-April-2009, Journal of Energy Security
xxvi IAEA, 2005
xxix “Federation of American Scientists: Status of World Nuclear Forces.” Fas.org.


For pdf of Part 1 of the essay, click here
For pdf of Part 2 of the essay, click here
 
A.P.J. Abdul Kalam was the 11th President of India, from 2002 to 2007, and pioneered the Vision for an Economically Developed India by 2020. He is at apj@abdulkalam.com| http://twitter.com/#!/official_kalam
Srijan Pal Singh is an expert in the area of sustainable development and is an Electrical Engineer with an MBA from the IIMA. He is at 7srijanpal@iimahd.ernet.in | http://twitter.com/#!/srijanpalsingh
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