National Feb 26, 2014

Japan to return weapons-grade plutonium U.S. provided during Cold War

Japan plans to return, at the request of Washington, plutonium provided by the United States for research purposes during the Cold War, government sources said Tuesday. The government wants to be seen contributing to nuclear nonproliferation, the sources said. The Obama administration asked for the plutonium ...

National Jan 27, 2014

Return arms-grade plutonium: U.S.

Washington is pressuring a reluctant Tokyo to return over 300 kg of mostly weapons-grade plutonium it let Japan experiment with during the Cold War.

Spent fuel good enough for bomb, U.S. told Japan in 1977

National / History Oct 30, 2013

Spent fuel good enough for bomb, U.S. told Japan in 1977

The United States believed in 1977 that nuclear weapons could be produced from plutonium extracted from spent nuclear fuel at Japan's light water reactors and conveyed its view to Tokyo, according to Japanese diplomatic records declassified Wednesday. A U.S. arms control official told a Japanese ...