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Since 1950, there have been 32 nuclear weapon accidents, known as "Broken Arrows." A Broken Arrow is defined as an unexpected event involving nuclear weapons that result in the accidental launching, firing, detonating, theft or loss of the weapon. To date, six nuclear weapons have been lost and never recovered. 1950s Date: November 10, 1950 Location: Quebec, Canada A B-50 jettisoned a Mark 4 bomb over the St. Lawrence River near Riviere-du-Loup, about 300 miles northeast of Montreal.
K-219 was a Project 667A Navaga -class ballistic missile submarine ( NATO reporting name "Yankee I") of the Soviet Navy . She carried 16 (later 15) SS-N-6 liquid-fuel missiles powered by UDMH with IRFNA , equipped with an estimated 34 nuclear warheads. [ 1 ] K-219 was involved in what has become one of the most controversial submarine incidents in the Cold War . [ edit ] The incident On Friday 3 October 1986, while on an otherwise routine, Cold War nuclear deterrence patrol in the North Atlantic 680 miles (1,090 km) northeast of Bermuda , the 15-year old K-219 suffered an explosion and fire in a missile tube. The seal in a missile hatch cover failed, allowing saltwater to leak into the missile tube and react with residue from the missile's liquid fuel.
K-8 was a November class submarine of the Soviet Northern Fleet that sank in the Bay of Biscay with its nuclear weapons on board on April 12, 1970. A fire on April 8 had disabled the submarine and it was being towed in rough seas, killing 52 crewmen who were attempting the salvage towing operation when it sank. [ edit ] Accidents [ edit ] 1960 Loss of coolant On 13 October 1960, while operating in the Barents Sea , K-8 suffered a ruptured steam generator tube, causing a loss-of-coolant accident .
USS Scorpion (SSN-589) was a Skipjack -class nuclear submarine of the United States Navy , and the sixth vessel of the U.S. Navy to carry that name. Scorpion was declared lost on 5 June 1968 with 99 crewmen dying in the incident. The USS Scorpion is one of two nuclear submarines the U.S.
The K-27 was the only submarine of Project 645 in the Soviet Navy . Project 645 did not have or need its own NATO reporting name . That project produced just one test model nuclear submarine , one which incorporated a pair of experimental VT-1 nuclear reactors that used a liquid-metal coolant ( Lead-bismuth eutectic ), placed into the modified hull of a November class submarine (Project 627A). [ edit ] Launch and operations
The second USS Thresher (SSN-593) was the lead boat of her class of nuclear-powered attack submarines in the United States Navy . Her loss at sea during deep-diving tests in 1963 is often considered a watershed event in the implementation of the rigorous submarine safety program SUBSAFE . The contract to build Thresher was awarded to Portsmouth Naval Shipyard on 15 January 1958, and her keel was laid on 28 May 1958.
Coordinates : "Azorian" (erroneously called "Jennifer" after its Top Secret Security Compartment by the press) [ 2 ] was the code name for a U.S. Central Intelligence Agency (CIA) project to recover the sunken Soviet submarine K-129 from the Pacific Ocean floor in the summer of 1974, using the purpose-built ship Hughes Glomar Explorer . [ 3 ] The 1968 sinking of the K-129 occurred approximately 1,560 nautical miles (2,890 km) northwest of Hawaii. [ 4 ] Project Azorian was one of the most complex, expensive, and secretive intelligence operations of the Cold War at a cost of about $800 million ($3.8 billion in 2013 dollars). In addition to designing the high tech recovery ship and its unique lifting cradle, the U.S. used concepts developed with Global Marine (see Project Mohole ) that utilized their precision stability equipment to keep the ship nearly stationary above the target (and do this while lowering nearly three miles of pipe).