Other countries have refused to cooperate with Israel on nuclear matters because it has not signed the NPT, and there has been increasing international pressure for Israel to be more transparent about its nuclear arsenal.

Army Radio's diplomatic correspondent said the reported offer could put Israel on a par with India, another NPT holdout which is openly nuclear-armed but in 2008 secured a U.S.-led deal granting it civilian nuclear imports.

During Tuesday’s meeting between Prime Minister Benjamin Netanyahu and U.S. President Barack Obama,  also discussed calls for a conference on a nuclear-free Middle East, which was proposed during the 2010 Non-Proliferation Treaty (NTP) review conference in New York and which Netanyahu said he would not take part in because it intends to single out Israel.

Israel neither confirms nor denies having nuclear weapons under an ambiguity strategy billed as warding off foes while avoiding public provocations that can spark regional arms races.