Reporting of safety events

EDF Energy operates its nuclear power stations to the highest possible safety standards meeting the stringent requirements of the World Association of Nuclear Operators (WANO). These standards are based on years of experience in nuclear operations worldwide and provide a solid basis for safely and reliably operating nuclear power stations.

The industry is also subject to exacting regulation and oversight from independent regulators; in the UK this is the Office for Nuclear Regulation (ONR). The oversight arrangements require us to report any deviations to our safety standards, however small, so they can be prioritised and addressed. Open reporting in this way is an important element of our nuclear safety culture and is positively encouraged throughout the organisation.

To provide consistency in the way events are reported across the world, the International Nuclear Events Scale (INES) was introduced by the International Atomic Energy Agency in 1990. It is a worldwide tool for communicating to the public in a consistent way the safety significance of nuclear and radiological events. Events are classified on the scale at seven levels: Levels 1–3 are called "incidents" and Levels 4–7 "accidents". Events without safety significance are called “deviations” and are classified Below Scale / Level 0.

As part of our reporting arrangements we inform the ONR of incidents and events that happen on our sites, of these the vast majority were rated at INES Level 1 or below. There has been one event greater than INES 1 within EDF Energy in the last 10 years. None of these events have had an impact on public safety or the environment.

The document linked below give details of the events rated at INES 1 and higher, showing the event date, location, description of the type of event and the level on the INES scale. It also includes a trend chart of the number of events by year since 2009.

Events reported to the Regulator between 2009 and 2021

International Nuclear Events Scale