NUMBER OF SIGNIFICANT EVENTS IN THE MEDICAL FIELD(*) NUMBER OF SIGNIFICANT EVENTS RATED ON THE INES SCALE(*) 1,172 events in the Basic Nuclear Installations 1,068 103 84 events in the transport of radioactive substances 80 4 210 events in small-scale nuclear facilities (medical and industrial) 176 1 34 Level 0 Level 1 Level 2 642 significant events per area of exposure 120 significant events in external beam radiotherapy and brachytherapy according to the rating on the ASN-SFRO scale Brachytherapy External beam radiotherapy Nuclear medicine Computed tomography Conventional and dental radiology Fluoroscopy guided interventional practices Hors échelle Niveau 0 Niveau 1 Niveau 2 87 226 186 11 23 109 (*) The INES scale (International Nuclear and Radiological Event Scale) was developed by IAEA to explain to the public the importance of an event in terms of safety or radiation protection. This scale applies to events occurring in BNIs and events with potential or actual consequences for the radiation protection of the public and workers. It does not apply to events with an impact on the radiation protection of patients, and the criteria normally used to rate events (notably the dose received) are not applicable in this case. As it was pertinent to be able to inform the public of radiotherapy events, ASN –in close collaboration with the French Society for Radiotherapy and Oncology– developed a scale specif ic to radiotherapy events (ASN-SFRO scale). These two scales cover a relatively wide range of radiation protection events, with the exception of imaging events. Out of scale Level 0 Level 1 Level 2 Level 3 Hors échelle Niveau 0 Niveau 1 Niveau 2 Niveau 3 63 35 17 4 1 THE FRENCH NUCLEAR SAFETY AUTHORITY KEY FIGURES 2021 ABSTRACTS – ASN REPORT ON THE STATE OF NUCLEAR SAFETY AND RADIATION PROTECTION IN FRANCE IN 2021
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