Defense officials and nuclear policy experts said the Pentagon supported the White House's desire to cut as much as a third to the size of the nuclear stockpile.

WSJ: Korean Blast Fans Nuclear Concerns

But China was likely to adjust the dimensions and details of its plans including the number of nuclear warheads and strategic missiles it deploys and the activities of its nuclear submarines, those experts said.

WSJ: U.S.-China Nuclear Silence Leaves a Void

As of Monday morning, the U.S. Nuclear Regulatory Commission had two technical experts in Tokyo, said Gregory Jaczko, the NRC chairman.

WSJ: Obama Administration Stands Behind Nuclear Power

The Rokkasho reprocessing facility, based in Japan's northern Aomori prefecture, is capable of producing nine tons of weapons-usable plutonium annually, said Japanese officials and nuclear-industry experts, enough to build as many as 2, 000 bombs, although Japanese officials say their program is civilian.

WSJ: U.S. Opposes Japan's Nuclear Plan

North Korea has said its nuclear test in February involved a miniature device, a description U.S. and international experts said at the time could mean the government had developed a warhead small enough to mount onto a missile.

WSJ: Korean Nuclear Worries Raised

The parties have agreed to hold a technical-level meeting in Istanbul on July 3, where experts in nuclear technology will hash out details, she said.

CNN: Little headway in Iranian nuclear talks

Japan's government is consulting with experts from the U.S. Nuclear Regulatory Commission and the French nuclear fuel company Areva, said Hidehiko Nishiyama, deputy director-general of Japan's Nuclear and Industrial Safety Agency and the agency's chief spokesman.

CNN: STORY HIGHLIGHTS