THTR
| THTR-300 | |
|---|---|
Cooling tower of the THTR-300 (demolished in 1991)
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| Country | Germany |
| Coordinates | 51°40′45″N 7°58′18″E / 51.67917°N 7.97167°ECoordinates: 51°40′45″N 7°58′18″E / 51.67917°N 7.97167°E |
| Construction began | 1971 |
| Commission date | November 16, 1985 |
| Decommission date | April 20, 1988 |
| Owner(s) | HKG |
| Operator(s) | HKG |
| Nuclear power station | |
| Reactor type | PBR |
| Power generation | |
| Units decommissioned | 1 × 308 MW |
| Nameplate capacity | 308 MW |
| Capacity factor | 40.1% |
| Annual output | 1,083 GWh |
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Website Official Site |
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The THTR-300 was a thorium high-temperature nuclear reactor rated at 300 MW electric (THTR-300) in Hamm-Uentrop, Germany. It started operating in 1983, synchronized with the grid in 1985, operated at full power in February 1987 and was shut down September 1, 1989. The THTR-300 served as a prototype high-temperature reactor (HTR) to use the TRISO pebble fuel produced by the AVR, an experimental pebble bed operated by VEW. The THTR-300 cost €2.05 billion and was predicted to cost an additional €425 million through December 2009 in decommissioning and other associated costs. The German state of North Rhine Westphalia, Federal Republic of Germany, and Hochtemperatur-Kernkraftwerk GmbH (HKG) financed the THTR-300’s construction.
The electrical generation part of the THTR-300 was finished late due to ever-newer requirements and licensing procedures. It was constructed in Hamm-Uentrop from 1970 to 1983 by Hochtemperatur-Kernkraftwerk GmbH (HKG). Heinz Riesenhuber, Federal Secretary of Research at that time, inaugurated it, and it first went critical on September 13, 1983. It started generating electricity on April 9, 1985, but did not receive permission from the atomic legal authorizing agency to feed electricity to the grid until November 16, 1985. It operated at full power in February 1987 and was shut down September 1, 1989.
The THTR-300 was a helium-cooled high-temperature reactor with a pebble bed core consisting of approximately 670,000 spherical fuel compacts each 6 centimetres (2.4 in) in diameter with particles of uranium-235 and thorium-232 fuel embedded in a graphite matrix. The pressure vessel that contained the pebbles was prestressed concrete. The THTR-300's power conversion system was similar to the Fort St. Vrain reactor in the USA, in that the reactor coolant transferred the reactor core's heat to water.
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