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PWR2 Reactor
The Rolls-Royce pressurised water reactor (PWR) series has powered the UK's Royal Navy nuclear submarines since the , commissioned in 1966. The first British nuclear submarine, , was powered by a Westinghouse S5W reactor. Nuclear reactor designs, operating methods and performance standards are highly classified. Details of this type regarding the reactors are not available. PWR1 The first British naval reactor, the PWR1, utilising a core and reactor assembly of purely British design, went critical in 1965, four years later than planned. Technology transfers under the 1958 US-UK Mutual Defence Agreement eventually made Rolls-Royce entirely self-sufficient in reactor design in exchange for a "considerable amount" of information regarding submarine design and quietening techniques being passed on to the United States. The reactor fuel is highly enriched uranium (HEU) enriched to between 93% and 97%. Each nuclear core has a life of about 10 years, so has to be refueled about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolls-Royce Marine Power Operations
Rolls-Royce Submarines, a subsidiary of Rolls-Royce plc, operates three sites licensed to handle nuclear material, two of which are at Raynesway in Derby, and the other at Vulcan Nuclear Reactor Testing Establishment (NRTE), Dounreay, UK. The Manufacturing Site was licensed in August 1960 and deals with processing of uranium fuel and the fabrication of Rolls-Royce PWR nuclear reactor cores for Royal Navy submarines such as the new . The Neptune/Radioactive Components Facility Site was licensed in November 1961 and houses the Neptune test reactor which is used to conduct experiments on reactor cores. It was created as a joint company in 1954 with the name Rolls-Royce and Associates; the associates being Vickers, Foster Wheeler and later Babcock & Wilcox Babcock & Wilcox is an American renewable, environmental and thermal energy technologies and service provider that is active and has operations in many international markets across the globe with its headquarters in Akro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Churchill-class Submarine
The three Repeat ''Valiant''-class submarines, sometimes known as the ''Churchill'' class,Hool, Jack, and Nutter, Keith, ''Damned Un-English Machines, a history of Barrow-built submarines'', pub Tempus, 2003, page 177. were nuclear-powered fleet submarines which served with the Royal Navy from the 1970s until the early 1990s. The ''Churchill'' class was based on the older , but featured many internal improvements. The lead vessel was named after the former Prime Minister and First Lord of the Admiralty Winston Churchill. was the most famous of the class, sinking the Argentinian cruiser during the 1982 Falklands War. , this is the only instance of a nuclear-powered submarine of any nation sinking an enemy ship by torpedo. Design The ''Churchill''s carried a crew of 103 and had a full load displacement of 4,900 tons whilst dived. They were long, had a beam of and a draught of . Their single pressurized water-cooled reactor supplied steam to two English Electric geared t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
S9G Reactor
The S9G reactor is a United States Naval reactor, naval reactor used by the United States Navy to provide electricity generation and Nuclear marine propulsion, propulsion on Virginia class submarine, ''Virginia'' class submarines. The S9G designation stands for: * S, Submarine platform * 9, Ninth generation Nuclear reactor core, core designed by the contractor * G, General Electric was the contracted designer Design This pressurized water reactor (PWR) style nuclear reactor, designed by Knolls Atomic Power Laboratory (then managed by General Electric), is designed to have increased energy density, and new plant components, including a new steam generator design featuring improved corrosion resistance and reduced life-cycle costs. The steam generator will alleviate the corrosion concerns encountered in existing designs of steam generators, while reducing component size and weight and providing greater flexibility in overall arrangement. The reactor is designed to operate for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Institution Of Naval Architects
The Royal Institution of Naval Architects (also known as RINA) is an international organisation representing naval architects. It is an elite international professional institution based in London. Its members are involved worldwide at all levels in the design, construction, repair and operation of ships, boats and marine structures. Members are elected by the council and are presented with the titles AssocRINA (Associate), AMRINA (Associate Member), MRINA (Member) and FRINA (Fellow) depending on their membership type. These title are usually suffixed after the name of the member. The Patron of the Institution is Queen Elizabeth II. History The Royal Institution of Naval Architects was founded in Britain in 1860 as The Institution of Naval Architects and incorporated by Royal Charter in 1910 and 1960 to "advance the art and science of ship design". Founding members included John Scott Russell, Edward Reed, Rev Joseph Woolley, Nathaniel Barnaby, Frederick Kynaston Barnes and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dreadnought-class Submarine
The ''Dreadnought'' class is the future replacement for the ''Vanguard'' class of ballistic missile submarines. Like their predecessors they will carry Trident II D-5 missiles. The ''Vanguard'' submarines entered service in the United Kingdom in the 1990s with an intended service life of 25 years. Their replacement is necessary if the Royal Navy is to maintain a continuous at-sea deterrent (CASD), the principle of operation behind the Trident system. Provisionally named "Successor" (being the successor to the Vanguard class SSBNs), it was officially announced in 2016 that the first of class would be named ''Dreadnought'', and that the class would be the ''Dreadnought'' class. The next three boats will be called ''Valiant'', ''Warspite'' and ''King George VI''. Background Since the retirement of the last Royal Air Force WE.177 nuclear bomb in 1998, the British nuclear arsenal has been wholly submarine-based. It is intended to deter a potential enemy because they cannot e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astute-class Submarine
The ''Astute'' class is the latest class of nuclear-powered fleet submarines ( SSNs) in service with the Royal Navy. The boats are being constructed by BAE Systems Submarines at Barrow-in-Furness. Seven boats will be constructed: the first of class, , was launched by Camilla, Duchess of Cornwall, in 2007, commissioned in 2010, and declared fully operational in May 2014. The ''Astute'' class is the replacement for the fleet submarines in Royal Navy service. Development Batch 2 ''Trafalgar'' class The ''Astute''-class programme began in February 1986 when the Ministry of Defence (MOD) launched a number of studies intended to determine the capabilities and requirements for the replacement of its ''Swiftsure'' and ''Trafalgar''-class fleet submarines. These studies, called project SSN20, were conducted during the Cold War, when the Royal Navy maintained a strong emphasis on anti-submarine warfare to counter increasingly more capable Soviet submarines. To match this growing threat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vanguard-class Submarine
The ''Vanguard'' class is a class of nuclear-powered ballistic missile submarines (SSBNs) in service with the Royal Navy. The class was introduced in 1994 as part of the Trident nuclear programme, and comprises four vessels: , , and , built between 1986 and 1999 at Barrow-in-Furness by Vickers Shipbuilding and Engineering, now owned by BAE Systems.''Jane's Fighting Ships, 2004–2005''. Jane's Information Group Limited. p. 794. . All four boats are based at HM Naval Base Clyde (HMS ''Neptune''), west of Glasgow, Scotland. Since the decommissioning of the Royal Air Force WE.177 free-fall thermonuclear weapons during March 1998, the four ''Vanguard'' submarines are the sole platforms for the United Kingdom's nuclear weapons. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loss-of-coolant Accident
A loss-of-coolant accident (LOCA) is a mode of failure for a nuclear reactor; if not managed effectively, the results of a LOCA could result in reactor core damage. Each nuclear plant's emergency core cooling system (ECCS) exists specifically to deal with a LOCA. Nuclear reactors generate heat internally; to remove this heat and convert it into useful electrical power, a coolant system is used. If this coolant flow is reduced, or lost altogether, the nuclear reactor's emergency shutdown system is designed to stop the fission chain reaction. However, due to radioactive decay, the nuclear fuel will continue to generate a significant amount of heat. The decay heat produced by a reactor shutdown from full power is initially equivalent to about 5 to 6% of the thermal rating of the reactor. If all of the independent cooling trains of the ECCS fail to operate as designed, this heat can increase the fuel temperature to the point of damaging the reactor. *If water is present, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freedom Of Information Act 2000
The Freedom of Information Act 2000 (c. 36) is an Act of the Parliament of the United Kingdom that creates a public "right of access" to information held by public authorities. It is the implementation of freedom of information legislation Freedom of information laws allow access by the general public to data held by national governments and, where applicable, by state and local governments. The emergence of freedom of information legislation was a response to increasing dissatisfa ... in the United Kingdom on a national level. Its application is limited in Scotland (which has its own freedom of information legislation) to UK Government offices located in Scotland. The Act implements a manifesto commitment of the Labour Party in the 1997 United Kingdom general election, 1997 general election, developed by David Clark, Baron Clark of Windermere, David Clark as a 1997 White Paper. The final version of the Act was criticised by freedom of information campaigners as a diluted f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
