Summary Radioactive, fissile plutonium from Cold War a headache for US US wants to halt disposal of it, use 20 metric tons for fuel Trump administration sees it as potential fuel for new reactors Critic points out similar program failed due to costs WASHINGTON, Aug 22 (Reuters) - The Trump administration plans to make available about 20 metric tons of Cold War-era plutonium from dismantled nuclear warheads to U.S. power companies as a potential fuel for reactors, according to a source familiar with the matter and a draft memo outlining the plan. Plutonium has previously only been converted to fuel...