Bradwell nuclear power station

Bradwell nuclear power station is a Magnox-design nuclear power station that is undergoing decommissioning. It is located on the Dengie peninsula at the mouth of the River Blackwater, Essex. In 2019, it was the first nuclear power station in the UK to be placed into long-term decommissioned management. As of 2016, China General Nuclear Power Group is considering Bradwell for the site of a new nuclear power station, named Bradwell B.

Bradwell nuclear power station
CountryEngland
LocationBradwell-on-Sea, Essex
Coordinates51°44′29″N 0°53′49″E
StatusDecommissioning in progress
Construction began1957
Commission date1962
Decommission date2002
Owner(s)Nuclear Decommissioning Authority
Operator(s)Magnox Ltd
Nuclear power station
Reactor typeMagnox
Reactor supplierThe Nuclear Power Group (TNPG)
Power generation
Units operationalParsons
Units decommissioned2 reactors
242 MW
Nameplate capacity
  • 242 MW
External links
Websitewww.magnoxsouthsites.com/about-us/our-sites/bradwell
CommonsRelated media on Commons

History
The two Magnox reactor buildings in 2010 from the entrance road

Construction of the power station by a consortium involving Clarke Chapman, Head Wrightson, C. A. Parsons & Co., A. Reyrolle & Co., Strachan & Henshaw and Whessoe and known as the Nuclear Power Plant Company (NPPC)[1] began in December 1957, and electricity generation started in 1962.

Bradwell had two Magnox-design reactors with a design output of 300 MW of net electrical output, although this was reduced to 242 MW net electrical in total[2] as a result of the discovery of breakaway oxidation of mild-steel components inside the reactor vessel. The reactors were supplied by The Nuclear Power Group (TNPG), and the nine turbines and 12 gas circulators by C. A. Parsons & Co.[3] (six of 52 MW main turbines supplying power to the grid, three of 22.5 MW auxiliaries turbines, one for each reactor for driving the gas circulators, with one standby auxiliary turbine). Steam pressure and temperature at the turbine stop valves was 730 psi (50 bar) and 371 °C (700 °F).[4]

Bradwell's peak output, achieved in the early 1960s, was nearly 10% above the design value. On a typical day it could supply enough electricity to meet the needs of towns the size of Chelmsford, Colchester and Southend.

Location

Bradwell was built on the edge of RAF Bradwell Bay, a former World War II airfield, 1.5 miles (2.4 km) from the Essex coastline. Its location was deliberately chosen, as the land had minimal agricultural value, offered easy access, was geologically sound and had an unlimited source of cooling water from the North Sea.

Nuclear fuel for Bradwell was delivered and removed via the nearest railhead, a loading facility adjacent to Southminster railway station on the Crouch Valley line. This included a dedicated siding and a gantry crane.[5]

In 1969, a new Honeywell 316 was installed as the primary reactor temperature-monitoring computer; this was in continuous use until summer 2000, when the internal 160 kB disk failed. Two PDP-11/70s, which had previously been secondary monitors, were moved to primary.

Electricity output

Electricity output from Bradwell power station over the period 1964–1984 was as follows.[4][6]

Bradwell annual electricity output GWh.

Decommissioning

In 1999, it was announced that the station would cease operation in 2002 – the first UK station to be closed on a planned basis. On 28 March 2002, Lord Braybrooke, Lord Lieutenant of Essex, unveiled a plaque to mark the cessation of electricity generation and the beginning of the decommissioning stage.[7] Decommissioning is being carried out by Nuclear Decommissioning Authority (NDA) subsidiary Magnox Ltd. All spent nuclear fuel was removed from the site by 2005, the turbine hall was demolished in 2011, and by 2016 underground waste storage vaults had been emptied and decontaminated.[8]

Demolition of all buildings except the ponds and two reactor buildings was completed in 2019. Demolition of the reactor buildings and final site clearance is planned for 2083 to 2093.[9]

Future plans
Main article: Bradwell B nuclear power station
Aerial view of the power station in 2007

In 2007, Bradwell became one of the sites being considered by British Energy for redevelopment in a new round of nuclear reactors.[10] On 18 October 2010, the British government announced that Bradwell was one of the eight sites it considered suitable for future nuclear power stations.[11]

In 2014, The Sunday Times reported that the China General Nuclear Power Group and China National Nuclear Corporation were preparing preliminary designs for a 3 GW nuclear power station at Bradwell to submit to the Office for Nuclear Regulation.[12]

On 21 September 2015, Energy Secretary Amber Rudd announced that "China was expected to lead the construction of a Beijing-designed nuclear station at the (Bradwell) Essex site".[13][14] EDF's chief executive Jean-Bernard Lévy stated that the reactor design under consideration is the Hualong One.[15] On 21 October 2015, it was reported that Britain and China have reached Strategic Investment Agreements for three nuclear power plants, including one at Bradwell.[16]

On 19 January 2017, the UK Office for Nuclear Regulation started their Generic Design Assessment process for the Hualong One design, expected to be completed in 2021, in advance of possible deployment at Bradwell.[17] The target commercial operation date is about 2030.[18]

The press have raised concerns about Chinese government involvement in the project.[19] State-owned China General Nuclear Power Group,[20][21] specified as a designer and operator of the plant, is blacklisted by the United States Department of Commerce for attempting to acquire advanced U.S. nuclear technology and material for diversion to military use.[22][23]

Safety record

In 1966, 20 natural uranium fuel rods were stolen from Bradwell.[24] The rods were stolen for their perceived scrap value by Harold Arthur Sneath, a worker at the plant. The theft was discovered by the local police when a van driven by Dennis Patrick Hadley, who was transporting the rods to their final destination, was stopped due to its defective steering. The rods were recovered and, in the subsequent court case, Sneath and Hadley were bound over for five years, each fined £100, and were required to contribute to the costs of the court case. Neither was said to have understood the consequences of the theft.[25]

On 22 January 2011, a fire broke out during the decommissioning work as condenser tubes made from titanium were being cut up. No radiation was released from this fire.[26]

In literature

The construction of the original power station is the subject of the Michael Morpurgo story Homecoming.[27]

See also

References
  1. The UK Magnox and AGR Power Station Projects
  2. "Bradwell – Facts and figures". Magnox Ltd. Archived from the original on 30 March 2009. Retrieved 7 February 2011.
  3. Nuclear Power Plants in the UK – England Archived 2009-07-19 at the Portuguese Web Archive.
  4. CEGB Statistical Yearbook (various years). CEGB, London.
  5. Brailsford, Martyn (2016). Railway Track Diagrams Book 2: Eastern. Frome: Trackmaps. pp. 10A. ISBN 9780954986681.
  6. CEGB Annual report and Accounts, 1963
  7. "Nuclear Power Plant Closes". BBC Online. 28 March 2002.
  8. "Magnox completes decontamination at Bradwell". World Nuclear News. 30 June 2016. Retrieved 5 July 2016.
  9. "The 2010 UK Radioactive Waste Inventory: Main Report" (PDF). Nuclear Decommissioning Agency/Department of Energy & Climate Change. February 2011. Archived from the original (PDF) on 25 March 2012. Retrieved 22 May 2012.
  10. "British Energy eyes nuclear sites". BBC Online. 27 November 2007.
  11. "Nuclear power: Eight sites identified for future plants". BBC News. BBC. 18 October 2010. Retrieved 18 October 2010.
  12. "Chinese nuclear plans for Bradwell power station could be 'catastrophic'". Essex Chronicle. 29 August 2014. Archived from the original on 2 April 2015. Retrieved 30 March 2015.
  13. "UK guarantees 2bn nuclear plant deal as China investment announced". BBC. 21 September 2015. Retrieved 22 September 2015.
  14. George Parker (21 September 2015). "UK paves path for west's first China-designed nuclear reactor". Financial Times. Archived from the original on 11 December 2022. Retrieved 22 September 2015.
  15. Geert De Clercq (23 September 2015). "Only China wants to invest in Britain's new £2bn Hinkley Point nuclear plant because no one else thinks it will work, EDF admits". The Independent. Retrieved 24 September 2015.
  16. "Hinkley Point nuclear agreement reached". BBC News. 21 October 2015.
  17. "UK GDA reports good progress for AP1000 and UK ABWR". Nuclear Engineering International. 23 March 2017. Retrieved 28 March 2017.
  18. "China General Nuclear ready to ramp up UK ambitions". World Nuclear News. 6 December 2018. Retrieved 10 December 2018.
  19. Butler, Nick (7 January 2019). "China's industrial ambitions pose dilemmas for Britain". Financial Times. Archived from the original on 11 December 2022.
  20. Pfeifer, Sylvia (18 September 2018). "Chinese willing to hand over control of UK nuclear plant". Financial Times. Archived from the original on 11 December 2022.
  21. Cook, James (15 August 2019). "Questions raised over China's involvement in Hinkley Point after US trade blacklist". The Telegraph.
  22. "China General Nuclear Power accused of espionage with its adviser in the US". 11 August 2016.
  23. "Four China Nuclear Industry Companies Added to "Entity List"".
  24. Amory B. Lovins & L. Hunter Lovins (1983). Brittle Power. Brick House Publishing Company. p. 146. ISBN 0-931790-49-2. Retrieved 10 August 2007.
  25. "Uranium theft not sinister". Burnham on Crouch and Dengie Hundred Advertiser. Essex record office. February 1967.
  26. "Bradwell nuclear power station hit by fire". BBC News. 21 January 2011.
  27. London: Walker Books. ISBN 978-1-4063-3202-5
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