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The seventh HMS ''Dreadnought'' was the United Kingdom's first nuclear-powered submarine, built by Vickers Armstrongs at Barrow-in-Furness. Launched by Queen Elizabeth II on Trafalgar Day 1960 and commissioned into service with the Royal Navy in April 1963, she continued in service until 1980. The submarine was powered by a S5W reactor, a design made available as a direct result of the 1958 US–UK Mutual Defence Agreement. ==Design and construction== The Royal Navy had been researching designs for nuclear propulsion plants since 1946, but this work was suspended indefinitely in October 1952〔''Vanguard to Trident; British Naval Policy since World War II'', Eric J. Grove, The Bodley Head, 1987, ISBN 0-370-31021-7〕 In 1955 the United States Navy completed , the world's first nuclear-powered submarine. During subsequent exercises with the Royal Navy, ''Nautilus'' demonstrated the advantages of the nuclear submarine against British anti-submarine forces, which had developed extensive anti-submarine warfare techniques during the Second Battle of the Atlantic. The Admiralty appreciated the utility of such vessels and under the drive of the First Sea Lord, Admiral The Earl Mountbatten of Burma and the Flag Officer Submarines, Sir Wilfred Woods, plans were formed to build nuclear-powered submarines.〔''Warships of the Royal Navy'', Captain John E. Moore RN, Jane's Publishing, 1979, ISBN 0-531-03730-4〕 Although the plan was to build all-British nuclear submarines, much time would be saved by accepting US nuclear technology. The excellent relations between Admiral Mountbatten and US Navy Chief of Naval Operations Arleigh Burke, expedited obtaining that help. This was despite Rear Admiral Hyman Rickover, in charge of the American naval nuclear power program, being set against any transfer of technology; indeed, Rickover prevented Mountbatten inspecting USS ''Nautilus''. It was not until a visit to Britain in 1956 that Rickover changed his mind and withdrew his objections.〔 Although Rickover wished to supply the third generation S3W reactor of the , Mountbatten exerted his influence and the entire machinery system for an American , with its fifth generation S5W reactor, was obtained.〔 This was known as the "American Sector" (see 1958 US-UK Mutual Defence Agreement). The hull and combat systems of ''Dreadnought'' were of British design and construction, although British access to the Electric Boat Company influenced the hull form and construction practices.〔 ''Dreadnought'' was laid down on 12 June 1959, and launched by Queen Elizabeth II on Trafalgar Day, 21 October 1960. The reactor was embarked in 1962 and ''Dreadnought'' made her first dive, in Ramsden Dock, on 10 January 1963. She commissioned on 17 April 1963. During ''Dreadnought''s construction, Rolls-Royce, in collaboration with the United Kingdom Atomic Energy Authority at the Admiralty Research Station, HMS ''Vulcan'', at Dounreay, developed a completely new British nuclear propulsion system. On 31 August 1960, the UK's second nuclear-powered submarine was ordered from Vickers Armstrong and, fitted with Rolls-Royce's PWR1 nuclear plant, was the first all-British nuclear submarine. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HMS Dreadnought (S101)」の詳細全文を読む スポンサード リンク
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