Pokhran II not fully successful: Indian scientist

NEW DELHI: The 1998 Pokhran II nuclear tests might have been far from the success they have been claimed to be. The yield of the thermonuclear explosions was actually much below expectations and the tests were perhaps more a fizzle rather than a big bang.

The controversy over the yield of the tests, previously questioned by foreign agencies, has been given a fresh lease of life with K Santhanam, senior scientist and DRDO representative at Pokhran II, admitting for the first time that the only thermonuclear device tested was a "fizzle". In nuclear parlance, a test is described as a fizzle when it fails to meet the desired yield.

Santhanam, who was director for 1998 test site preparations, said that the yield for the thermonuclear test, or hydrogen bomb in popular usage, was much lower than what was claimed. Santhanam, who was DRDO's chief advisor, could well have opened up the debate on whether or not India should sign CTBT as claims that India has all the data required and can manage with simulations is bound to be called into question.

``Based upon the seismic measurements and expert opinion from world over, it is clear that the yield in the thermonuclear device test was much lower than what was claimed. I think it is well documented and that is why I assert that India should not rush into signing the CTBT,'' said Santhanam.

He emphasized the need for India to conduct more tests to improve its nuclear weapon programme.

The test was said to have yielded 45 kilotons (KT) but was challenged by western experts who said it was not more than 20 KT.

The exact yield of the thermonuclear explosion is important as during the heated debate on the India.