Seawolf

United States nuclear submarine

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In submarine: Adoption by navies
…nuclear submarines, the Nautilus and Seawolf, to test the two types, but problems (including leakage) in the Seawolf reactor led to the abandonment of the liquid-metal scheme. Later the navy also developed natural-circulation reactors. U.S. attack submarines (except for USS Narwhal, the natural-circulation prototype) are built with pressurized-water reactors, but…
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