Recalling the voluntary moratorium declared by India on nuclear tests, he said, "We have also indicated willingness to move towards a de-jure formalisation of this declaration."

"We do not intend to use these weapons for aggression or for mounting threats against any country. These are weapons of self-defence, to ensure that India is not subjected to nuclear threats or coercion. We do not intend to engage in an arms race," the prime minister said.

He also tabled a paper on"Evolution of India's Nuclear Policy." "India is now a nuclear weapon state. This is a reality that cannot be denied. It is not a conferment that we seek; nor is it a status for others to grant. It is an endowment to the nation by our scientists and engineers. It is India's due, the right of one-sixth of human kind," he said. The house will have a full debate and the prime minister is expected to reply to it on Thursday.