Abstracts ASN Report 2019

ŁŇĸĺŅĴŇļłŁ łĹ ŇĻĸ ĿĸņņłŁņ ĿĸĴŅŁĸķ ĹŅłŀ ŇĻĸ ňľňņĻļŀĴ ĴļļĶĻļ accident for the facilities presenting more limited risks shall be assessed by ASN on the occasion of the next periodic safety reviews. Lastly, there is no reason to perform stress tests on facilities which are nearing the end of decommissioning and will soon be delicensed. ב ِ ב Áǝƺ ȵƺȸǣȒƳǣƬ ɀƏǔƺɎɵ ȸƺɮǣƺɯɀ Ȓǔ ǔƏƬǣǼǣɎǣƺɀ ɖȇƳƺȸǕȒǣȇǕ ƳƺƬȒȅȅǣɀɀǣȒȇǣȇǕ The conformity check aims to ensure that the changes in the facility due to the decommissioning work or to ageing do not call into question its conformity with the provisions of the regulatory texts and its technical baseline requirements. Given the diversity of the facilities and the situations involved, each periodic safety review must be individually examined by ASN. ASN applies a method of examination that is adapted to the risks inherent to the facilities: some facilities warrant particular attention owing to the risks they present and may be reviewed by the Advisory Committee for Decommissioning (GPDEM) set up ļŁ ӅӃӄӋє łŅ łŇĻĸŅņ ŃŅĸņĸŁŇļŁĺ Ĵ ĿłŊĸŅ ĿĸʼnĸĿ łĹ Ņļņľё ŇĻĸ ĸŋŇĸŁŇ łĹ the inspections and examinations is adapted accordingly. When a facility has been finally shut down and its decommission- ing file has to be transmitted to the Minister in charge of nuclear safety and ASN, simultaneous filing of the decommissioning file and the periodic safety review conclusions report is considered to be best practice. The two files can thus be reviewed at the same time. Ł ӅӃӄӌё ĶłŁŇļŁňĸķ ŇĻĸ ĸŋĴŀļŁĴŇļłŁ łĹ ŇĻĸ ņĴĹĸŇŌ ŅĸʼnļĸŊ reports of some twenty facilities undergoing decommissioning that have been received since 2015. Inspections on the topic of ŇĻĸ ŃĸŅļłķļĶ ņĴĹĸŇŌ ŅĸʼnļĸŊ Ňłłľ ŃĿĴĶĸ ļŁ ӅӃӄӌׇłŁ ŇĻŅĸĸ ĹĴĶļĿļŇļĸņ undergoing decommissioning. These inspections are used to check the means implemented by the licensee to carry out its review, as well as compliance with the action plan resulting from its conclusions. They led to several requests for corrective action and additional information. ב ِ ג IǣȇƏȇƬǣȇǕ ƳƺƬȒȅȅǣɀɀǣȒȇǣȇǕ ي ³z ټ ɀ ȒȵǣȇǣȒȇ on the triennial reports The regulatory framework for ring-fencing the funds necessary for management of the long-term decommissioning and waste management expenses is presented in point 1.4. Ł Ӌׇ ňŁĸ ӅӃӄӊё ŃňĵĿļņĻĸķ łŃļŁļłŁ і іӅӃӄӊі ӃӅӅӈӋӋ relative to the examination of the three-yearly reports ņňĵŀļŇŇĸķ ļŁ ӅӃӄӉׇĵŌ ŇĻĸ ĿļĶĸŁņĸĸņё ĶłŁĶĸŅŁļŁĺ ŇĻĸ ĴĶĶłňŁŇņ ĶĿłņĸķ at the end of 2015. With regard to the evaluation methodology, ASN had noted disparities in the level of detail in the submitted reports. More ņŃĸĶļĹļĶĴĿĿŌё ŇĻĸ ŇŅļĸŁŁļĴĿ ŅĸŃłŅŇ ķļķ ŁłŇ ŃŅłʼnļķĸ ņňĹĹļĶļĸŁŇ ļŁĹłŅŀĴŇļłŁ ĹłŅ Ňł ĴķłŃŇ Ĵ ŃłņļŇļłŁє ķļķ ŁłŇ ŃŅĸņĸŁŇ its costs evaluation reactor by reactor, yet some situations do display particularities (taking into account the operating history, the post-operational clean-out of the structures and soils, etc.). Nor does the information provided allow an assessment of the envisaged savings resulting from the experience acquired in the decommissioning of technologically similar reactors. ASN had also noted that some decommissioning scenarios were based on the assumption that the radioactive waste and spent fuel treatment facilities would be available when required, and pointed out the need to assess the impact if these facilities were not to be available on the projected date. ASN recommended that for these facilities which must be created, the licensees take into consideration the hypotheses concerning their construction, operation and decommissioning. With regard to the clean-out of the civil engineering structures and remediation of soils, ASN noted that few licensees took sufficient account of the cost of soil remediation in their evaluation. Lastly, ASN noted that the cost of facility modifications, resulting in particular from the stress tests and the works for continued łŃĸŅĴŇļłŁ ҎŃĸŅļłķļĶ ņĴĹĸŇŌ ŅĸʼnļĸŊņ ĴŁķ ѡņ Ѣ grand carénage ” overhaul programme), were generally not explicitly taken into account. The licensees update these evaluations annually. ASN examined ŇĻĸ ňŃķĴŇĸ ŁłŇĸ ņňĵŀļŇŇĸķ ļŁ ӅӃӄӋє ņ ĵĸĹłŅĸё łĵņĸŅʼnĸķ that some of the operations to prepare for decommissioning were not covered by ring-fenced assets. ASN, however, considers that all the operations carried out after final shutdown must be secured by the creation of ring-fenced assets. In this update review, ASN underlines the attention to be paid to costing the uncertainties linked to the management of materials (depleted and reprocessed uranium, thorium) and certain radioactive wastes (bituminised waste, LLW-LL). ASN also pointed out that the level of contamination and the corresponding management plans should be explicitly analysed. ASN Report on the state of nuclear safety and radiation protection in France in 2019 339 ׏ ٲ ב DECOMMISSIONING OF BASIC NUCLEAR INSTALLATIONS 13