Iran will not agree to ship out its stockpile of enriched uranium, one of its main negotiators said Sunday ahead of talks with world powers on its nuclear program.

Iran will not agree to ship out its stockpile of enriched uranium, one of its main negotiators said Sunday ahead of talks with world powers on its nuclear program.

"We will negotiate about the volume, levels and the methods of enrichment but shipping out the (enriched) material is a red line for Iran," deputy foreign minister Abbas Araqchi told the state broadcaster.

The remarks came on the eve of two-day talks in Geneva, the first meeting between Iranian negotiators and world powers since President Sheikh Hasan Rouhani took office in August.

The red line adds to Tehran's insistence on what it beleives its "right" to operate a uranium enrichment program on its soil -- which could provide fuel for both civilian and military objectives.

"The Iranian negotiating team will present a specific plan ... which we hope will produce results in a logical time period," Araqchi said.

Foreign Minister Mohammad Javad Zarif is Iran's top negotiator with the so-called P5+1 group of the United States, Britain, China, France and Russia plus Germany.

But Araqchi said he will lead the Iranian team in the talks with European Union foreign policy chief Catherine Ashton and representatives from the P5+1 countries as Zarif will only attend the opening meeting.

He said Iran would "remove all of (the) rational concerns of the other side," referring to suspicions in the West and Israel that Tehran is pursuing nuclear arms under the guise of a civilian energy program, a claim the Islamic state vehemently denies.