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The head of the National Nuclear Security Administration’s (NNSA) naval reactors program suggested Wednesday that the use of highly enriched uranium (HEU) for naval propulsion offers a significant advantage over the conversion of naval reactors to low-enriched uranium – indicating that the U.S. Navy’s longstanding preference for HEU is unlikely to change.Admiral James Caldwell Jr., NNSA’s deputy administrator for naval reactors, said at a Senate Appropriations Energy and Water Subcommittee hearing that “success would not be guaranteed” in an LEU-based…
