| Sellafield nuclear site | |
|---|---|
 2005 view of the site | |
 | |
| Official name | Sellafield Site. Known 1956-1971 as Windscale & Calder Works, known 1947-1956 as Windscale Works. |
| Country | United Kingdom |
| Location | Seascale, Cumbria |
| Coordinates | 54°25′14″N 3°29′51″W / 54.4205°N 3.4975°W |
| Status | Operational |
| Commission date | Windscale Piles (non-power generating): 1950 Calder Hall: 1956 Windscale AGR: 1962 |
| Owner | Nuclear Decommissioning Authority |
| Operator | Sellafield Ltd |
| Employees | 10,000+ |
| Nuclear power station | |
| Reactor type | Magnox (Calder Hall) AGR prototype (Windscale) |
| Power generation | |
| Units operational | No nuclear power generation since 2003. Processes still active: spent fuel storage, waste processing and storage, and plant decommissioning. |
| Units decommissioned | Units taken out of service: Calder Hall: 4 x 60 MWe (gross) Windscale AGR: 1 x 36 MWe. Final decommissioning for complete site 2120 |
| External links | |
| Commons | Related media on Commons |
grid reference NY034036 | |
Sellafield, formerly known as Windscale, is a large multi-function nuclear site close to Seascale on the coast of Cumbria, England. As of August 2022, primary activities are nuclear waste processing and storage and nuclear decommissioning. Former activities included nuclear power generation from 1956 to 2003, and nuclear fuel reprocessing from 1952 to 2022.
The licensed site covers an area of 265 hectares (650 acres),[1] and comprises more than 200 nuclear facilities and more than 1,000 buildings.[2] It is Europe's largest nuclear site and has the most diverse range of nuclear facilities in the world on a single site.[3] The site's workforce size varies, and before the COVID-19 pandemic was approximately 10,000 people. The UK's National Nuclear Laboratory has its Central Laboratory and headquarters on the site.
Originally built as a Royal Ordnance Factory in 1942, the site briefly passed into the ownership of Courtaulds for rayon manufacture following WW2, but was re-acquired by the Ministry of Supply in 1947 for the production of plutonium for nuclear weapons which required the construction of the Windscale Piles and the First Generation Reprocessing Plant, and it was renamed "Windscale Works". Subsequent key developments have included the building of Calder Hall nuclear power station - the world's first nuclear power station to export electricity on a commercial scale to a public grid, the Magnox fuel reprocessing plant, the prototype Advanced Gas-cooled Reactor (AGR) and the Thermal Oxide Reprocessing Plant (THORP). Decommissioning projects include the Windscale Piles,[4] Calder Hall nuclear power station, and a number of historic reprocessing facilities and waste stores.
The site is owned by the Nuclear Decommissioning Authority (NDA) which is a non-departmental public body of the UK government. Following a period 2008–2016 of management by a private consortium, the site was returned to direct government control by making the Site Management Company, Sellafield Ltd, a subsidiary of the NDA. Decommissioning of legacy facilities, some of which date back to the UK's first efforts to produce an atomic bomb, is planned for completion by 2120 at a cost of £121 billion.[5]
Sellafield was the site in 1957 of one of the world's worst nuclear incidents. This was the Windscale fire which occurred when uranium metal fuel ignited inside Windscale Pile no.1. Radioactive contamination was released into the environment, which it is now estimated caused around 240 cancers in the long term, with 100 to 240 of these being fatal.[6][7][8] The incident was rated 5 out of a possible 7 on the International Nuclear Event Scale.[6]
- ^ NDA draft strategy, August 2020
- ^ Sellafield Ltd, annual report 2017-2018, retrieved Sept 2019
- ^ Sellafield context plan, published May 2017 by assets.publishing.service.gov.uk, retrieved Sept 2019
- ^ Kragh, Helge (1999). Quantum Generations: A History of Physics in the Twentieth Century. Princeton NJ: Princeton University Press. pp. 286. ISBN 978-0-691-09552-3.
- ^ Cite error: The named reference
sellafield_indep-2018was invoked but never defined (see the help page). - ^ a b Black, Richard (18 March 2011). "Fukushima – disaster or distraction?". BBC News. Archived from the original on 11 April 2020. Retrieved 30 June 2020.
- ^ Ahlstrom, Dick (8 October 2007). "The unacceptable toll of Britain's nuclear disaster". The Irish Times. Archived from the original on 25 October 2021. Retrieved 15 June 2020.
- ^ Highfield, Roger (9 October 2007). "Windscale fire: 'We were too busy to panic'". The Telegraph. Archived from the original on 15 June 2020. Retrieved 15 June 2020.