He said that the Atomic Energy Commission (AEC) had last week come out with the 'most authoritative' statement on the efficacy of the 1998 nuclear tests and no more clarification was required from the government on the matter.
"They (AEC) were satisfied in 1998 and they were satisfied in 2009. Now what are you going to discuss?" he said to a news channel.
Narayanan said, "The AEC was asked to study the data of the 1998 nuclear tests once again in the wake of the controversy over the efficacy of the hydrogen bomb following the statements of former DRDO scientist K Santhanam."
"I think, we have done what we have done. Beyond that I do not know what we can do," he said.
Scientists like C N R Rao, P Rama Rao and M R Srinivasan were members of the AEC and the doyen of the nuclear programme Raja Ramanna was part the apex nuclear body which went into the test results in 1998.