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Communication Dans Un Congrès Année : 2023

Updates of the french criticality safety analysis guide and event database (logic)

Résumé

At ICNC 2011 [1], IRSN presented a guide devoted to criticality risks analysis. In addition to general information (physical phenomena, studies, rules, etc.), this guide included an appendix with diagrams describing the items of the French criticality safety regulations, and the questions to be delt with when performing an analysis or an expert assessment. A new version of the guide, published in 2022, takes into account upgrades of the French regulations since 2010 and includes new topics: reactor loading and unloading operations (also concerned by criticality safety, contrary to operating reactors), measurements of fissile material masses, neutron reflections and interactions, and criticality accidents (detection and alarm, protection, means to stop an accident). New questions have also been added in order to take into account scenarios encountered in reported criticality safety events since 2010 that cannot be described by the 2010 guide scenarios. The Neutronics and Criticality Safety Department (SNC) uses its own database of criticality safety events, so called "LOGIC" (including events that occurred in France and some foreign events), where each event is associated with a scenario to be chosen from a list of scenarios corresponding to the "questions" of the guide. LOGIC also includes elements presented in the operator event reports (chronology, causes, consequences, preventive measures), IRSN experts remarks and complements resulting from the analysis of the event report. This article presents the 2022 version of the criticality safety analysis guide, the LOGIC event database and the links between the guide and the event database.
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Dates et versions

irsn-04523024 , version 1 (27-03-2024)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

  • HAL Id : irsn-04523024 , version 1

Citer

Fabien Duret, Matthieu Duluc, Aurelie Bardelay. Updates of the french criticality safety analysis guide and event database (logic). ICNC 2023 - The 12th International Conference on Nuclear Criticality Safety, JAEA - Japan Atomic Energy Agency; NEA - Nuclear Energy Agency, Oct 2023, Sendai (Japan), Japan. ⟨irsn-04523024⟩
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