ASN Report 2020

18 Reactor trip 2 Occurrence of an internal or external natural hazard (flood, fire, etc.) 30 Inadvertent start-up of a protection or safeguard system 31 Design, manufacturing or assembly anomaly 2 Event which caused or could cause multiple failures 1 Event concerning on-site transports 37 Transition to shutdown state according to the technical operating specifications or accident procedures 238 Other significant events which could affect safety TOTAL 741 4 Event or anomaly specific to the primary or secondary system 378 Non-compliance or event which could lead to non-compliance with technical operating specifications GRAPH 1 Events involving safety in NPPs notified in 2020 18 Fault, deterioration or failure which affected a safety function 13 Event actually or potentially affecting the containment of hazardous materials 7 Event which led to or which could have led to the dispersal of hazardous materials 9 Inadvertent start-up of a protection or safeguard system 2 Event concerning on-site transports TOTAL 146 23 Other significant events which could affect safety 72 Event which led to safety limits being exceeded 2 On-site or off-site hazard affecting the availability of important equipment GRAPH 2 Events involving safety in BNIs other than NPPs notified in 2020 28 Other significant events which could affect the environment 7 Non-compliance with the site or facility waste evaluation 18 Non-compliance with an operational requirement which could lead to a significant impact 9 Bypassing of normal discharge channels, with a significant impact in terms of radioactive substances TOTAL 132 12 Confirmed overshoot of a discharge or concentration limit 28 Bypassing of normal discharge channels, with a significant impact in terms of chemical substances 30 Non-compliance with the Order of 31 December 1999 GRAPH 3 Significant environment-related events in BNIs notified in 2020 158 ASN Report on the state of nuclear safety and radiation protection in France in 2020 03 – REGULATION OF NUCLEAR ACTIVITIES AND EXPOSURE TO IONISING RADIATION