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Hinkley Point A nuclear power station is a decommissioned Magnox Nuclear power station located on a site in Somerset on the Bristol Channel coast, west of the River Parrett estuary. ==History== The construction of the power station, which was undertaken by a consortium backed by English Electric, Babcock & Wilcox Ltd and Taylor Woodrow Construction,〔(Nuclear Development in the United Kingdom )〕 began in 1957. The reactors and the turbines were supplied by English Electric.〔(Nuclear Power Plants in the UK )〕 The power station, which is currently being decommissioned, had twin Magnox reactors, each supplying steam to three English Electric 93.5MW turbine generator sets which were all together across both reactors designed to produce 500 MWe but, after de-rating of the reactor power output due to corrosion concerns, both reactors combined produced 470 MWe.〔(【引用サイトリンク】title=PRIS - Reactor Details Hinkley A1 )〕 The design followed the principles established by the Calder Hall nuclear power station, in that it used a reactor core of natural uranium fuel in Magnox alloy cans within a graphite moderator, all contained in a welded steel pressure vessel. The core was cooled by CO2 pumped by six nominal 7,000 hp (5.2MW) gas circulators, which transported the hot gas from the core to the six Steam Raising Units (boilers) via steel ducts. The gas circulators could be driven by induction motors supplied with mains electricity or, when steam was available, dedicated variable speed turbo alternator sets. The design pressure of the gas circuit was 185 psig, and the temperature of the gas leaving the reactor was 378 °C, although this was later reduced when the hot CO2 was found to be corroding the mild steel components of the gas circuit more quickly than had been anticipated. Like all Magnox reactors, Hinkley Point A was designed for on-load refuelling so that exhausted fuel elements could be replaced with fresh without shutting down the reactor. While primarily planned for peaceful electricity generation, Hinkley Point A was modified so that weapons-grade plutonium could be extracted for military purposes should the need arise. Like all other British Magnox power stations, Hinkley Point A had numerous backup systems to maintain an excellent safety record throughout its career. Emergency backup systems consisting of 5 x 1,050hp English Electric 8CSV Diesel Generating Sets were installed at the station, which provided power to both reactors gas circulation systems if power was lost in the event of a SCRAM. 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「Hinkley Point A nuclear power station」の詳細全文を読む スポンサード リンク
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