Iran has put forward a new proposal to resolve the nuclear crisis that includes a freeze on production of 20% enriched uranium, a pledge to convert its stockpile to fuel rods and an agreement to relinquish spent fuel for a still-to-be completed heavy water reactor, according to an Iranian source who has proven reliable in the past.

The offers, combined with increased scrutiny by the International Atomic Energy Agency (IAEA), are meant to provide confidence that Iran could not quickly break out of its nuclear obligations and make nuclear weapons.

The Iranian, who asked not to be identified because the negotiations that resumed Tuesday, Oct. 16, in Geneva are supposed to be confidential, said the proposal presented by Iranian Foreign Minister Mohammad Javad Zarif included two stages, each to last a maximum six months.

In the first stage, the source said, Iran would stop producing 20% enriched uranium and “try to convert the stock” it has amassed to fuel rods for the Tehran Research Reactor, an old American-origin facility that produces medical isotopes.