LES ACTIVITÉS NUCLÉAIRES : RAYONNEMENTS IONISANTS ET RISQUES POUR LA SANTÉ ET L’ENVIRONNEMENT 3.1.1 – National nuclear and radiological emergency exercises In the same way as in previous years, and together with the SGDSN, the DGSCGC and ASND, ASNR prepared a programme of national nuclear and radiological emergency exercises for 2025, concerning BNIs and the transport of radioactive substances. This programme was announced to the Prefects in the interministerial instruction of 3 February 2025. Generally speaking, these exercises enable the highest-level decision-making circles to be tested, along with the ability of the leading players to communicate, sometimes with simulated media pressure on them. Table 2 describes the key characteristics of the national exercises conducted in 2025. In addition to the national exercises, the Prefects are asked to conduct local exercises for the sites in their département, in order to improve preparedness for radiological emergency situations and more specifically to test the time needed to mobilise all the parties concerned. The performance of a national nuclear and radiological emergency exercise, at maximum intervals of five years on the nuclear sites covered by a PPI, and at least one annual exercise concerning the transport of radioactive substances, would seem to be a fair compromise between the training of individuals and the time needed to effect changes to organisations. In 2025, in addition to the general objectives of the exercises listed in table 2, additional objectives were introduced into the schedule, taking account of lessons learned and the results of the exercises and experimental training carried out in 2024. ASNR is also heavily involved in the preparation and performance of other emergency exercises that have a nuclear safety component and are organised by other players such as: ∙its counterparts for nuclear security (HFDS – Defence and Security High Official reporting to the Minister in charge of energy) or for Defence-related facilities (ASND); ∙the international bodies (IAEA, European Commission, Nuclear Energy Agency – NEA); ∙the Ministries for Health, the Interior, etc. Nuclear site Dates of exercise Main characteristics COBALT MAGNET exercise (United States) 17 March • Testing of bilateral coordination mechanisms CEA – Valduc Centre (21) 26 March • Testing of the new organisation with ASND Brest naval base – Île Longue (29) 6 and 7 May • Testing of the new organisation with ASND EDF’s Chinon NPP (37) 12 and 13 June • Decision-making process and simulated media pressure • Deployment of environmental and human measurement resources in the field (ASNR + SDIS) • Testing of the emergency response protocol with Luxembourg IAEA exercise – ConvEx 3 (Romania) 24 and 25 June • Testing of international reporting mechanisms in the event of an accident in a European country • Testing of the mechanisms for offering assistance to a country affected by an accident Orano La Hague 25 June • Decision-making process • Safety – security interface Transport of radioactive substances (84) 8 July • Test on a rail transport accident • Feedback from the field to the national Emergency Response Centre Transport of radioactive substances (80) 25 September • Road transport accident test • Feedback from the field to the national Emergency Response Centre Flamanville NPP (50) 16 October • Decision-making process and simulated media pressure Saint-Dizier air base (52) 6 and 7 November • Testing of the new organisation with ASND Gravelines NPP (59) 27 and 28 November • Decision-making process • Testing crisis communication procedures with Belgium and the IAEA TABLEAU 2 National nuclear and radiological emergency exercises conducted in 2025 HIGHLIGHT No. 2 A full-scale deployment exercise of ASNR’s measurement resources On 12 and 13 June 2025, the Chinon NPP (Indre-et-Loire) was the scene of a large-scale deployment of ASNR’s environmental and health measurement resources as part of the national emergency exercise. Around fifty ASNR experts and responders were mobilised, together with all the radioactivity measurement resources that could be deployed in the field: response vehicles, laboratory vehicles, mobile monitoring stations, mobile spectrometric measurement systems mounted on an aerial platform (helicopter) and ground platforms (light vehicles), a transmission vehicle, and vehicles and portable equipment for measuring internal contamination in individuals (boxer, shelter, Syalma system). One of the aims of this exercise was to test the measurement strategy in order to strengthen the coordination of ASNR’S teams with local and national players: Prefecture, fire brigade (SDIS and Mobile Radiological Intervention Unit – CMIR), licensee teams. 186 ASNR Report on the state of nuclear safety and radiation protection in France in 2025
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