World’s safest nuke reactor in India

India unveiled before the international community on Thursday, its revolutionary design of 'A Thorium Breeder Reactor' that can produce 600 MW of electricity for two years 'with no refuelling and practically no control manoeuvres.' Designed by scientists of the Mumbai-based Bhabha Atomic Research Centre, the ATBR is claimed to be far more economical and safer than any power reactor in the world.

Most significantly for India, ATBR does not require natural or enriched uranium which the country is finding difficult to import. It uses thorium -- which India has in plenty -- and only requires plutonium as 'seed' to ignite the reactor core initially. Eventually, the ATBR can run entirely with thorium and fissile uranium-233 bred inside the reactor (or obtained externally by converting fertile thorium into fissile Uranium-233 by neutron bombardment).

BARC scientists V Jagannathan and Usha Pal revealed the ATBR design in their paper presented at the week-long 'international conference on emerging nuclear energy systems' in Brussels. The design has been in the making for over seven years. According to the scientists, the ATBR while annually consuming 880 kg of plutonium for energy production from 'seed' rods, converts 1,100 kg of thorium into fissionable uranium-233. This diffrential gain in fissile formation makes ATBR a kind of thorium breeder. The uniqueness of the ATBR design is that there is almost a perfect 'balance' between fissile depletion and production that allows in-bred U-233 to take part in energy generation thereby extending the core life to two years. This does not happen in the present day power reactors because fissile depletion takes place much faster than production of new fissile ones. BARC scientists say that "the ATBR with plutonium feed can be regarded as plutonium incinerator and it produces the intrinsically proliferation resistant U-233 for sustenance of the future reactor programme." They say that long fuel cycle length of two years.

(Courtesy: The Times of India; August 25, 2005)