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ONR prosecution revealed significant shortfalls from both companies following the incident at the Dungeness B nuclear power station in Kent.

ONR has changed the regulatory attention levels from enhanced to routine attention for Berkeley (Nuclear Restoration Services) and National Nuclear Laboratory (Sellafield Central Laboratory)

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.

First report details significant progress in streamlining regulatory processes for new reactor designs.

Heysham 2, Sizewell B and Sellafield were among sites visited as part of the Chief Nuclear Inspector's themed inspection to monitor if the nuclear industry is putting arrangements in place to provide resilience against climate change effects.