Iranian MPs told world powers on Tuesday not to repeat "past mistakes" in this week's Geneva talks and instead to use the historic meeting as a chance to end deadlock.
The MPs joint-statement came as the republic said it would soon inform the United Nations nuclear watchdog of a timetable for inspection of a newly disclosed uranium enrichment plant.
Raising the stakes ahead of Thursday's rare meeting, 239 lawmakers signed a statement expressing support for negotiations based on proposals put forward by Iran, which do not mention Tehran's own nuclear program.
"We remind the negotiating countries that this is an historic opportunity which can be a way out of the current deadlock and solve the problems," the MPs said in a statement quoted by state broadcaster IRIB.
"We recommend the 5+1 (six powers) to use this historic opportunity," it said. "If the group of 5+1 repeats past mistakes instead of using this opportunity, the Iranian parliament would take other decisions as it did in the past."
Meanwhile, Press TV quoted Ali Akbar Salehi, head of Iran's Atomic Energy Organization, as saying: "Yes, the inspectors will come and inspect."
Salehi added Tehran was in constant contact with the U.N. International Atomic Energy Agency (IAEA).
"We are working out a timetable for the inspection and we will soon be writing a letter to them about the location of the facility and others," he said, without elaborating.
Last week's news of a second nuclear fuel facility, under construction south of Tehran, added urgency to the rare meeting in Geneva on Thursday. Iran's missile tests on Sunday and Monday added to tension with Western powers.
We are working out a timetable for the inspection and we will soon be writing a letter to them about the location of the facility and others
Ali Akbar Salehi, Iranian Atomic Energy Organization
Open to IAEA inspection
Iran has rejected Western condemnation of the new facility, saying it is legal and open to IAEA inspection.
Ali Asghar Soltanieh, Iran's envoy to the IAEA, told the BBC on Monday he had had a couple of meetings with IAEA inspectors and it was agreed they would be given access to the site "in the near future". He gave no date.
The United States and its Western allies have made clear they will focus on Iran's nuclear program at the Geneva meeting. Iran has offered wide-ranging security talks but says it will not discuss its nuclear "rights."
Washington suspects Iran is trying to develop nuclear bomb capability. Iran, a major oil producer, says its nuclear work is solely for generating electricity.
"It is against our tenets, it is against our religion to produce, use, hold or have nuclear weapons or arsenal, how can we more clearly state our position, since 1974 we have been saying this," Press TV quoted Salehi as saying.
It is against our tenets, it is against our religion to produce, use, hold or have nuclear weapons or arsenal, how can we more clearly state our position, since 1974 we have been saying