The Associated Press reports: The United Nations will release a report this week certifying that Iran’s ability to make a nuclear bomb has been greatly reduced because it has diluted half of its material that can be turned most quickly into weapons-grade uranium, diplomats said Tuesday.

The move is part of Iran’s commitments under a deal with six world powers in effect since January that mandates some nuclear concessions on the part of Tehran in exchange for a partial lifting of sanctions crippling its economy.

A key concern for the six was Iran’s stockpile of 20-percent enriched uranium, which is only a technical step away from the 90-percent grade used to arm nuclear weapons. By late last year, Iran had already amassed almost enough of the 20-percent grade for one nuclear bomb, with further enrichment.

Under the agreement, Iran agreed to halt its 20-percent enrichment program and to turn half of its nearly 200-kilogram (440-pound) stockpile into oxide for reactor fuel. As well, it pledged to dilute the other half into low-enriched uranium. [Continue reading…]