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PWR1
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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resolution-class Submarine
The ''Resolution'' class was a class of four nuclear ballistic missile submarines ( SSBN) built for the Royal Navy as part of the UK Polaris programme. Each submarine was armed with up to 16 UGM-27 Polaris A-3 nuclear missiles. The class comprised , , and . They were built by Vickers Armstrong in Barrow-in-Furness and Cammell Laird in Birkenhead between 1964 and 1968. All four boats were based at HM Naval Base Clyde (HMS ''Neptune''), west of Glasgow, Scotland. The ''Resolution'' class was the launch platform for the United Kingdom's strategic nuclear deterrent from the late 1960s until 1996, when it was replaced by the carrying the Trident II. Background During the 1950s and early 1960s, the United Kingdom's nuclear deterrent was based on the RAF's V-bombers. But in the early 1960s developments in radar and surface-to-air missiles made it clear that bombers were becoming vulnerable, and would be unlikely to penetrate Soviet airspace. Free-fall nuclear weapons would ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dounreay
Dounreay (; gd, Dùnrath) is a small settlement and the site of two large nuclear establishments on the north coast of Caithness in the Highland area of Scotland. It is on the A836 road west of Thurso. The nuclear establishments were created in the 1950s. They were the Nuclear Power Development Establishment (NPDE) for the development of civil fast breeder reactors, and the Vulcan Naval Reactor Test Establishment (NRTE), a military submarine reactor testing facility. Both these no longer perform their original research functions and will be completely decommissioned, some of which has been in progress for a while. The two establishments have been a major element in the economy of Thurso and Caithness, but this will decrease with the progress of decommissioning. The NPDE will enter an interim care and surveillance state by 2036, and become a brownfield site by 2336. An announcement in July 2020 that the Nuclear Decommissioning Authority (NDA) will be taking over direct mana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulcan Naval Reactor Test Establishment
Dounreay (; gd, Dùnrath) is a small settlement and the site of two large nuclear establishments on the north coast of Caithness in the Highland area of Scotland. It is on the A836 road west of Thurso. The nuclear establishments were created in the 1950s. They were the Nuclear Power Development Establishment (NPDE) for the development of civil fast breeder reactors, and the Vulcan Naval Reactor Test Establishment (NRTE), a military submarine reactor testing facility. Both these no longer perform their original research functions and will be completely decommissioned, some of which has been in progress for a while. The two establishments have been a major element in the economy of Thurso and Caithness, but this will decrease with the progress of decommissioning. The NPDE will enter an interim care and surveillance state by 2036, and become a brownfield site by 2336. An announcement in July 2020 that the Nuclear Decommissioning Authority (NDA) will be taking over direct manag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trafalgar-class Submarine
The ''Trafalgar'' class is a class of nuclear-powered fleet submarines (SSNs) in service with the Royal Navy, and the successor to the . Like the majority of Royal Navy nuclear submarines, all seven boats were constructed at Barrow-in-Furness shipyard, Cumbria. With only one boat remaining active and in commission (as of 2022) and six retired from the seven originally in service, the class makes up part of the Royal Navy's nuclear-powered ‘hunter-killer’ submarine force. The ''Trafalgar'' class is being gradually replaced by the larger and more capable , of which five are currently commissioned. The name ''Trafalgar'' refers to the Battle of Trafalgar fought between the Royal Navy and the combined fleets of France and Spain in 1805. Development The ''Trafalgar'' class were designed in the early 1970s during the Cold War as a refinement of the preceding ''Swiftsure'' class. Including , the ''Trafalgar'' class are the fifth class of nuclear-powered fleet submarines to enter ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Submarine
A nuclear submarine is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed. Nuclear submarines have considerable performance advantages over "conventional" (typically diesel-electric) submarines. Nuclear propulsion, being completely independent of air, frees the submarine from the need to surface frequently, as is necessary for conventional submarines. The large amount of power generated by a nuclear reactor allows nuclear submarines to operate at high speed for long periods, and the long interval between refuelings grants a range virtually unlimited, making the only limits on voyage times being imposed by such factors as the need to restock food or other consumables. The limited energy stored in electric batteries means that even the most advanced conventional submarine can only remain submerged for a few days at slow speed, and only a few hours at top speed, though recent advances in air-independent propulsion have somewhat ameliorated this disadv ... [...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] |
Swiftsure-class Submarine
The ''Swiftsure'' class was a class of nuclear-powered fleet submarines in service with the Royal Navy from the early 1970s until 2010. Six boats were built and commissioned. ''Swiftsure'' was decommissioned in 1992 due to damage suffered to her pressure hull during trials. followed in 2004 after defence cuts caused a reduction in the size of the Royal Navy submarine fleet. was decommissioned in January 2006, with following on 12 September 2006. was decommissioned on 26 September 2008. The remaining boat in the class, , was decommissioned in December 2010. The six boats of the class were not replaced, although the seven boats of the successor ''Trafalgar''-class submarines are in the process of being replaced by seven boats of the ''Astute''-class submarines. A few were upgraded with the capability to launch Tomahawk cruise missiles in addition to their original armaments of torpedoes, mines and anti-ship missiles. They were also the first class of Royal Navy submarines ... [...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] |
Hull Classification Symbol
The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration (NOAA) use a hull classification symbol (sometimes called hull code or hull number) to identify their ships by type and by individual ship within a type. The system is analogous to the pennant number system that the Royal Navy and other European and Commonwealth navies use. History United States Navy The U.S. Navy began to assign unique Naval Registry Identification Numbers to its ships in the 1890s. The system was a simple one in which each ship received a number which was appended to its ship type, fully spelled out, and added parenthetically after the ship's name when deemed necessary to avoid confusion between ships. Under this system, for example, the battleship ''Indiana'' was USS ''Indiana'' (Battleship No. 1), the cruiser ''Olympia'' was USS ''Olympia'' (Cruiser No. 6), and so on. Beginning in 1907, some ships also were referred to alternatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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