How many U.S. nuclear submarines have sunk?
Two-the USS Thresher (10 April 1963) and the USS Scorpion (27 May 1968). • 50.What caused the USS Thresher and USS Scorpion to sink? The exact reasons are unknown. However since the losses occurred, the Navy has implemented many changes to submarine safety systems, improved training of its sailors, and created many “redundant” submarine systems to provide primary and backup safety measures. The primary change has been the “SUBSAFE” system. “SUBSAFE” requires use of certified materials, trained personnel and inspectors to conduct work on key submarine systems (e.g., hatches and seawater piping). No other U.S. submarines have been lost at sea in over thirty years, following these extensive improvements. • 51.What happens to old submarines? The Navy is very environmentally conscious. A lot of care is taken in disposing of decommissioned submarines responsibly. The nuclear fuel is removed from the reactor and sent to Idaho for processing. The nuclear reactor compartments are cut out, caref
