Aberthaw power stations

Aberthaw Power Station refers to two decommissioned coal-fired and co-fired biomass power stations on the coast of South Wales, near Barry in the Vale of Glamorgan. They were located at Limpert Bay, near the villages of Gileston and West Aberthaw. The most recent power station on the site, Aberthaw B Power Station, co-fired biomass and as of 2008 had a generating capacity of 1,560 megawatts (MW). The power station closed on 31 March 2020.[2][3][4][5]


Aberthaw Power Station
Aberthaw B from the foreshore
CountryWales, United Kingdom
LocationBarry, Vale of Glamorgan
Coordinates51.387312°N 3.404866°W / 51.387312; -3.404866
StatusIn Decommissioning Process
Construction began1957 (Aberthaw A)
1967 (Aberthaw B)[1]
Commission date1963 (Aberthaw A)
1971 (Aberthaw B)
Decommission date1995 (Aberthaw A)
2020 (Aberthaw B)
Construction cost£50m (Aberthaw B)
Owner(s)RWE
Operator(s)RWE
Employees≈5
Thermal power station
Primary fuelCoal
Power generation
Units operational3 x 520 MW
Make and modelAssociated Electrical Industries
Nameplate capacity1,560 MW
External links
Websitehttps://uk-ireland.rwe.com/locations/aberthaw-power-plant
CommonsRelated media on Commons

The station was the location of a carbon capture trial system to determine whether the technology could be scaled up from lab conditions. The system consumed 1 MW.[4]

History

The site of the stations was a golf course before the construction of the first station.[6] Aberthaw was constructed by the Central Electricity Generating Board (CEGB) under the chairmanship of Christopher Hinton. It is known as one the original 'Hinton Heavies', a suite of new 500 MW units procured at the time.[7] Aberthaw "A" Power Station although recorded as first generating power on 7 February 1960, officially opened on 29 October 1963, and at the time it was the most advanced in the world.[8] Aberthaw "B" station opened in 1971. Aberthaw "A" operated until 1995.[9] It was subsequently demolished. Its two 425 feet (130 m) chimneys were the last section to be demolished, and this was done on Saturday, 25 July 1998.[10] The site now has three generating units, each driven by its own Foster-Wheeler boiler. From 2006–2007 new steam turbines were fitted, allowing each unit to generate an extra 28-30 MW of power. Each unit rated at 520 MW.

Operations

Aberthaw burned approximately 5,000–6,000 tonnes of fuel a day. The site usually burned two-thirds Welsh coal with the remainder being either foreign low-sulphur coal or biomass.

The station took its entire coal feed stock in by rail from the Vale of Glamorgan Line, under contract to DBS. Rail facilities included east- and west-facing connections to the main line, three reception sidings, No. 8 and No. 9 merry-go-round loop lines, two gross-weight and tare-weight weighbridges, two hopper wagon discharge hoppers, a former fly ash siding, an oil discharge siding, two sidings adjacent to the former A station, and two exchange sidings.[11][12]

Aberthaw A

The A station had six 100 MW turbo-alternators giving a gross output of 600 MW. The boilers operated on pulverised coal and delivered 570 kg/s of steam at 103.4 bar and 524 °C. Station cooling was by sea water. In 1980/1 the station sent out 1,718.786 GWh, the thermal efficiency was 30.23 per cent.[13] Aberthaw A was one of the CEGB’s twenty steam power stations with the highest thermal efficiency; in 1963–4 the thermal efficiency was 34.08 per cent, 34.67 per cent in 1964–5, and 34.27 per cent in 1965–6.[13]

The output from the A station was as follows:[13][14]

Annual electricity output of Aberthaw A
Year 1960–1 1961–2 1962–3 1963–4 1964–5 1965–6 1966–7 1971–2 1978–9 1980–1 1981–2
Electricity supplied, GWh 575.1 1848.1 2828.3 4,117 4,221 4,153 4,020 2,229 1,618 1,719 1,580

Aberthaw B

The B station had 2 × 462 MW and 1 × 475 MW turbo-alternators giving a gross output of 1,399 MW. The boilers operated on pulverised coal and delivered 1,170 kg/s of steam at 158.6 bar and 566 °C. Station cooling was by sea water. In 1978/9 the station sent out 4,083.124 GWh and in 1980/1 sent out 5,620.143 GWh.[13]

There was a gas-turbine generating facility at Aberthaw, this was commissioned in February 1967.[15] There were three 17.5 MW gas turbines with a total rating of 52.5 MW, they delivered 0.392 GWh in the year 1980/1.[13]

Until its closure, the Tower Colliery in Hirwaun supplied much of the coal for Aberthaw. Until 2017 coal came from the Ffos-y-fran Land Reclamation Scheme in Merthyr Tydfil. Other sources included: the Aberpergwm drift and opencast mines in the Neath Valley; and the Cwmgwrach Colliery via the Onllwyn Washery and the Tower Opencast mine based at the site of the original Tower Colliery. Further stocks were sourced from abroad, primarily Russia, and shipped in via the ports of Portbury, Avonmouth and Newport Docks.

In response to the UK government's renewable energy obligation that came into effect in April 2002, the station began firing a range of biomass materials to replace some of the coal burned. This is due to Welsh coal being less volatile than other coal and as such producing more sulphur dioxide and carbon monoxide.

Flue gas desulphurization

Aberthaw B was due for closure, but in June 2005 station owners Npower agreed to install new technology to reduce sulphur dioxide emissions by installing Flue Gas Desulphurization (FGD) equipment. This was to reduce sulphur dioxide levels by 90% by 2008, when new European environmental regulations came into place.[16] Construction of the equipment started on 21 June 2006, with a tree planting ceremony attended by the Welsh Minister for Enterprise, Innovation and Networks, Andrew Davies. The desulphurisation FGD project was being carried out by a consortium of Alstom and Amec Foster Wheeler, which was to have employed 500 workers on site at the peak of construction.[17]

Nuclear proposal

In 2006, it was reported that the site had been identified as a suitable location for a nuclear power station, based on the existing infrastructure and logistics.[18]

Again it has recently been proposed that the plant could be replaced by a power station using nuclear energy [19]

The Department of Trade and Industry said "We are conducting an energy review. The review is to see whether there should be a nuclear element to Britain's energy plan" The industry source told the Western Mail, "There is a document in existence which identifies Aberthaw as a suitable location for a nuclear power station.” [20]

Court case

On 26 March 2015, the BBC reported that the UK government was being taken to court by the European Commission over excess emissions of nitrogen oxides from Aberthaw power station.[21] This issue was raised in the National Assembly for Wales on 10 November 2015 by Bethan Jenkins AM.[22]

Closure

The stations closure was first announced on 1 August 2019.[3] The station officially closed on 31 March 2020, the same date of closure as Fiddlers Ferry Power Station in Widnes, Cheshire. The station is currently in its decommissioning process.[5]

See also

References
  1. "Long Railway Contract to Carry Power Plant Coal". The Times. 8 January 1964. Retrieved 26 August 2020.
  2. "Aberthaw power plant - Efficient hard-coal-fired power plant".
  3. Ambrose, Jillian (1 August 2019). "German utilities firm RWE to close its last UK coal plant in 2020". The Guardian. Retrieved 12 January 2021.
  4. Unwin, Jack (1 August 2019). "Aberthaw B power station given proposed closing date". Power Technology. Retrieved 12 January 2021.
  5. "Aberthaw Power Station set to close, risking 170 jobs". BBC News. 1 August 2019. Retrieved 12 January 2021.
  6. View Image : Barry, Wales Archived 15 October 2006 at the Wayback Machine
  7. Clarke, Jonathan (2013). "'High Merit': existing English post-war coal and oil-fired power stations in context". Historic England. p. 8. Retrieved 12 August 2019.
  8. "Archived copy". Archived from the original on 20 October 2007. Retrieved 27 August 2006.CS1 maint: archived copy as title (link)
  9. "Generation disconnections since 1991". nationalgrid.com/. 2003. Archived from the original on 8 May 2003. Retrieved 5 October 2009.
  10. "LLANCARFAN SOCIETY NEWSLETTER 83" (PDF). llancarfansociety.org.uk/. 1998. Archived from the original (PDF) on 4 October 2011. Retrieved 14 December 2008.
  11. Jacobs, Gerald (2000). Railway Track Diagrams – Great Western. Exeter: Quail. pp. 30A. ISBN 1898319391.
  12. Munsey, Myles (2018). Railway Track Diagrams Book 3: Western & Wales. Frome: Trackmaps. pp. 28A. ISBN 9781999627102.
  13. CEGB (1981). CEGB Statistical Yearbook (1964-81). Lndon: CEGB. pp. 7, 20.
  14. CEGB, Annual report and accounts, 1961, 1962 & 1963
  15. Handbook of Electricity Supply Statistics 1989. London: The Electricity Council. 1990. p. 8. ISBN 085188122X.
  16. "Aberthaw Power Station". Archived from the original on 23 September 2006.
  17. "RWE npower begins construction of £100m environmental technology at Aberthaw Power Station". Npower Media Centre. 21 June 2006. Archived from the original on 9 August 2011.
  18. Shipton, Martin (14 February 2006). "Aberthaw 'earmarked as nuclear station site'". Wales Online. Retrieved 14 July 2018.
  19. Ambrose, Jillian (31 March 2020). "Fiddler's Ferry and Aberthaw plants shut as firms ditch coal". the Guardian.
  20. Shipton, Martin (14 February 2006). "Aberthaw 'earmarked as nuclear station site'". WalesOnline. Retrieved 24 January 2021.
  21. "UK government taken to court over Aberthaw Power Station emissions". BBC news website. 26 March 2015. Retrieved 11 November 2015.
  22. "Oral Assembly Questions tabled on 5 November 2015 for answer on 10 November 2015" (PDF). National Assembly for Wales. 10 November 2015. Retrieved 11 November 2015.
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