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Britain's Nuclear Weapons - British Nuclear Testing (1575 words) |
 | Capenhurst made its initial start up in February 1952, but did not successfully enter operation until 1953 (producing low enriched uranium), and did not produce highly enriched uranium (HEU) until 1954. |
| The plant was given successive upgrades during the fifties, reaching a military significant capacity of 125 kg of highly enriched uranium a year in 1957, and much higher levels in 1959 (as much as 1600 kg/yr, or an enrichment capacity of 325,000 SWU/yr). |
| Capenhurst operated as a source of HEU at full capacity only until the end of 1961. |
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