“As we said before, we want to have enrichment inside Iran ... and any proposal which is based on this principle will be studied,” government spokesman Gholam Hossein Elham told reporters yesterday.
“We are studying the Russian proposal based on this framework. The government will never give up its principles.”
Moscow has suggested allowing Iran to conduct uranium enrichment in Russia, giving the country access to the nuclear fuel cycle while guaranteeing its nuclear program is for peaceful purposes.
The Russian proposal seeks to overcome the key sticking point in talks between Iran and the European Union over the programme, which the US alleges is a cover for nuclear weapons development.
Mr Elham’s comments came after nuclear negotiator Ali Larijani criticised the Russian proposal for having “serious problems.”
“It is an idea, not a structured proposal, we don’t see it as mature and it has serious problems,” Mr Larijani, the secretary of the country’s Supreme National Security Council, said.
Iran has denied it is seeking to build a nuclear bomb and says it is seeking only to produce electricity.
However, Mr Larijani did not completely reject the Russian proposal.
“The [Russian] plan could be complementary and supporting, there are technological benefits, we have to examine them. It is not rigid and there is room for manoeuvre,” he said.
Last week, another top national security official offered Tehran’s warmest reaction to the offer by vowing that his country would study it carefully.
“The new Russian proposal can be studied so that its economic, technical and scientific aspects will be clear,” Supreme National Security Council member Javad Vaidi said.
He said the Russian proposal was based on the establishment of a “joint Iran-Russia company on Russian soil” for the enrichment of uranium.
Russia enjoys close ties with Iran and is helping build the Bushehr nuclear power plant in southern Iran.