Heysham 1 is made up of two advanced gas-cooled reactors and is similar in design to Hartlepool. Construction for Heysham 1 started in 1970 and electricity generation started in 1983.
EDF have recently communicated their decision to extend the generating lifetime of the station to March 2026, subject to an adequate demonstration of safety.
The incident at Heysham 1 Power Station in Lancashire occurred on 23 December 2023, while Reactor 1 was being returned to service when a valve controlling the flow of superheated steam from the reactor failed, resulting in a steam leak.
Valve failure at Heysham 1 during return to service
EDF announces intention to seek operating extension
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