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GasCooled Fast Reactor Schemata.svg Generation IV gascooled fast reactor Gfr UTC Gfr derivative work Beao File LeadCooled Fast Reactor Schemata svg LeadCooled Fast Reactor File SodiumCooled Fast Reactor Schemata svg SodiumCooled Fast Reactor PDUSGov original upload log This image is derivative work of the following images