Thermal Oxide Reprocessing Plant - History

History

Construction of THORP started in the 1970s, and was completed in 1994. The plant went into operation in August 1997.

Between 1977 and 1978 an inquiry was held into an application by British Nuclear Fuels plc for outline planning permission to build a new plant to reprocess irradiated oxide nuclear fuel from both UK and foreign reactors. The inquiry was to answer three questions: "1. Should oxide fuel from United Kingdom reactors be reprocessed in this country at all; whether at Windscale or elsewhere? 2. If yes, should such reprocessing be carried on at Windscale? 3. If yes, should the reprocessing plant be about double the estimated site required to handle United Kingdom oxide fuels and be used as to the spare capacity, for reprocessing foreign fuels?". The result of the inquiry was that the new plant, the Thermal Oxide Reprocessing Plant, was given the go-ahead in 1978, although it was not completed until the 1990s at a cost of £1.8 billion.

In 1998/99, the plant faced severe economic difficulties when it failed to reach its reprocessing targets. Shut-downs for six months in the first half of 1998 and for several further months from December 1998, due to leakages, resulted in a failure to achieve the target of reprocessing 900 tonnes of fuel over that period. Most of the reprocessing contracts were with Germany and Japan.