International inspectors suspect that the site may have been used for testing bomb triggers.
Inspectors have visited Parchin, but the site is very large, and the nuclear monitors have not had access to the area around the building thought to have been used for testing the triggers.
In particular, Parchin, a military base which the IAEA believes may have been used for testing the detonation of high-explosive fuses designed for an implosion nuclear device, remains out of bounds.
Press reports from Vienna, where the IAEA is based, said Wednesday's report will also give details of the agency's suspicions that a steel bus-sized chamber spotted in satellite photos at a military complex at Parchin, 18 miles south-east of Tehran, has been used for testing explosive components for a nuclear weapon.
PARIS — A senior official of the United Nations nuclear supervisory body said Thursday that talks a day earlier in Iran had ended inconclusively and that international inspectors had not been given access to a site that they suspect may have been used for testing bomb triggers.
But in Iran's case such unprecedented powers are seen as essential.Disappointingly, however, there is no specific reference to military sites, such as Parchin, a facility that the IAEA believes may have been used for testing the high-explosive fuses that are needed to implode, and thus set off, the uranium or plutonium at the core of a bomb.
