"We are moving toward production of nuclear fuel which needs 3,000 centrifuges and more than that ... This plan is going ahead and is moving toward completion," Elham said.
Elham reiterated Iran’s official stance, saying that its nuclear activities were being supervised by the International Atomic Energy Agency (IAEA).
However, Elham repeated a threat, made by other Iranian officials in the past, to review its position over nuclear cooperation if pushed.
"We have not pulled out of the nuclear Non-Proliferation Treaty (NPT). But if they (the West) try to create obstacles then we will change our path as well," he said.
According to him, Iran was expected to announce further progress in its nuclear plans towards next month when Iranian President Mahmoud Ahmadinejad was expected to declare the successful completion of another step in the uranium enriching process.
In a direct response to the United Nations Security Council’s decision on 23 December to impose sanctions on the country, Iran said it would start installing 3,000 centrifuges, which experts say could make enough uranium for power plant fuel, or one bomb within a year.
But western diplomats and analysts had previously told Reuters Iran appeared not to have begun installing the machines for planned "industrial scale" output of enriched uranium.
News agencies contributed to this article