Communication Dans Un Congrès Année : 2019

Graded approach from the Regulatory Body/Technical Support Organization perspective

Résumé

The typology of the risks met in nuclear fuel cycle facilities is quite different from those encountered in nuclear power plants. These varied risks depend on radionuclide type, processes and chemical products used. Therefore, safety approach for fuel cycle facilities has to be adapted to the diversity of risks and of their origins, as well as the importance of the consequences that may result from accidental situations. From the Regulatory body/Technical support organization perspective, the use of graded approach could be illustrated in three areas: the categorization of nuclear facilities, the licensing process and the extent and depth of the safety expertise performed in support to the regulatory decision-making. In the French regulatory framework, basic nuclear installations (BNI) are installations which, due to their nature or to the quantity or activity of the radioactive substances they contain, are subject to particular provisions in order to protect the general public and the environment. The nuclear safety authority defined in 2015 3 categories of BNI taking into account several criteria such as the quantity and type of radioactive material, the existence of an off-site emergency plan, and the implementation of a “hardened safety core” following post-Fukushima stress tests. Based on these categories, ASN adapts the inspection program. The licensing process as established in the French regulatory framework differs in terms of actors and steps depending on the nature of the authorization or license to be issued. Thus, the process could be complex and last up to 3-year when the authorization results in a decree. License modifications of minor significance regarding safety could be authorized directly by the operator following the process established in his integrated management system (in that case the modification should be declared to the nuclear safety authority). In support to the regulatory decision-making, IRSN performs while requested by ASN a safety expertise of the documents submitted by the operator. The first step of this expertise is the preliminary review which aims at confirming the sufficiency and the relevance of the documents, and at defining the assessment perimeter. This perimeter comprises the topics to be evaluated, the depth of the expertise (level of detail) and the specialists to be involved. Hence, the preliminary review could be seen as a graded approach for the expertise.

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Dates et versions

hal-03511330 , version 1 (04-01-2022)

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  • HAL Id : hal-03511330 , version 1

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Frederic Ledroit, Florence Gauthier, Anne Cecile Jouve. Graded approach from the Regulatory Body/Technical Support Organization perspective. International Workshop on Developments in Safety Assessment Approaches and Safety Management Practices of Fuel Cycle Facilities, OECD/NEA/CSNI/WGFCS, Oct 2019, PARIS, France. ⟨hal-03511330⟩
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