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Heysham 1 Nuclear Power Station
Heysham, near Morecambe, Lancashire, UK
associated engineer
Not known
date  December 1970 - 8th July 1983
era  Modern  |  category  Power Generation  |  reference  SD400597
Heysham 1 is an Advanced Gas-Cooled reactor power station, with a similar reactor design to that at Hartlepool Nuclear Power Station. This type of reactor is unique to the UK. Heysham 1 shares a site with the later (and larger) Heysham 2 plant.
The two equal reactors at Heysham 1 have a combined net capacity of 1,160MW and supply electricity to more than 1.5 million homes. Total output for the year ended 31st March 2007 was 7.5 million MW-hours.
Reactor 1 achieved criticality on 6th April 1983 and was connected to the UK's National Grid on 8th July. Reactor 2 went critical on 3rd June 1984 with grid connection on 11th October. Both reactors began supplying electricity commercially on 1st April 1989 — as did the reactors at Heysham 2.
It was built by the Central Electricity Generating Board. Management passed to Nuclear Electric Ltd, then to the present operator British Energy plc (part of EDF Energy since January 2009). Its likely decommissioning date is 2014.
The reactors were shut down in October 2007, after corrosion of wires in the eight boiler closure units on each reactor was discovered. These units are only found at Heysham 1 and Hartlepool, which have a replaceable pod boiler design. During the reactors’ down time, other maintenance work was completed including replacing the cast iron cooling water pipes. Cooling water is abstracted from Morecambe Bay. The reactors were both back in service by 17th March 2009.
On 9th November 2009, the government announced their intention to build ten new nuclear power stations. Heysham was one of the sites selected.
Reactor installation: National Nuclear Corporation
Turbine and generator supply: General Electric (UK)
Research: ECPK

Heysham 1 Nuclear Power Station