three other reactors revealed no other defects. Heysham 1 unit 1 will operate on seven out of the eight boiler pods until a detailed repair strategy has been developed. Heysham 1 is scheduled to be shut down for defueling and then decommissioning in March 2024. Heysham 2 The construction, which was undertaken by a consortium known as National Nuclear Corporation (NNC), began in 1979 and the station opened in 1988. Its generating capacity is 1,250MWe, and it is estimated to keep running until at least 2030. Heysham 2 shares its reactor design with Torness nuclear power station near Dunbar in East Lothian, and is a development of the reactor design used at Hinkley Point B in Somerset. The reactors were supplied by NNC, the turbines and boilers by NEI. On 15 August 2019, Reactor 8 inside Heysham 2 let off a large amount of steam, with banging noises at approximately 11pm that could be heard away in Lancaster. This caused alarm among local residents, and numerous calls to the police reporting “gunshots”. EDF later reported that a reactor had earlier experienced a "non-planned shutdown after an electrical fault", and the noise was from the re-start process when unsilenced relief valves lifted on the Startup Vessels during boiler feeding. Heysham 2 is expected to be shutdown in 2028, prior to a three-year defueling period and then decommissioning. See also Nuclear power in the United Kingdom Energy policy of the United Kingdom Energy use and conservation in the United Kingdom References External links Heysham 1 official website Heysham 2 official website Heysham 1, Nuclear Engineering International wall chart, 1971 Heysham 2/Torness, Nuclear Engineering International wall chart, 1981 Nuclear power stations in England Buildings and structures in the City of Lancaster Power stations in North West England Nuclear power stations using Advanced Gas-cooled Reactors