HC Deb 17 December 1981 vol 15 c183W
Mr. Cook

asked the Secretary of State for Energy what is the total amount of plutonium which has been processed in the United Kingdom from 1956 to the latest convenient year.

Mr. Mellor

As detailed in the replies given to the hon. Member on 6 April and 14 May 1981, approximately 21 tonnes of plutonium have been separated in the United Kingdom for civil purposes as a result of reprocessing irradiated fuel. It would not be in the national interest to disclose total plutonium throughput since 1956.