Abstracts ASN Report 2019

T his ten-yearly outage is one of the steps of its fourth periodic safety review. This periodic safety review is particularly important because the initial hypothesis used in the design of some of the reactor equipment was 40 years of operation. Extending its operation beyond this periodmeans that these design studies must be updated or some equipment replaced. This periodic safety review is also an opportunity to complete the incorporation of the changes arising from the ASN requirements issued following the stress tests performed in the wake of the accident that struck the Fukushima Daiichi NPP. ASN has been involving the public since 2016 in the drafting of its position statement regarding the objectives proposed by EDF. This approach continued in 2018, under the aegis of the High Committee for Transparency and Information on Nuclear Security, in the form of a consultation on the measures planned by EDF to meet these objectives. ASN will also consult the public on the position it is to adopt at the end of 2020 for the generic phase of the periodic safety review. During the ten-yearly outage at Tricastin NPP reactor 1, EDF carried out tightened inspections on the compliance of equipment important for safety and ten-yearly tests on the reactor coolant system and the containment. These inspections participate in the closer attention to the compliance of the facilities requested of EDF by ASN. EDF also made changes to its facility to improve safety. For example, EDF installed a new fuel pool cooling system and a system to remove heat from the containment in the event of an accident with fuel melt. These changes help bring the safety objectives closer in line with those of the third generation reactors. ASN has implemented a specific inspection programme before, during and after the ten-yearly outage, entailing about ten more inspections than a conventional ten-yearly outage. ³z ƬȒȇɀǣƳƺȸɀ ɎǝƏɎ Ɏǝƺ ȵƺȸǔȒȸȅƏȇƬƺ Ȓǔ Ɏǝǣɀ Ɏƺȇ ٮ ɵƺƏȸǼɵ ȒɖɎƏǕƺ ɯƏɀ Ȓȇ Ɏǝƺ ɯǝȒǼƺ ɀƏɎǣɀǔƏƬɎȒȸǣǼɵِ XɎ ɯǣǼǼ ǣɀɀɖƺ Ə ȵȒɀǣɎǣȒȇ ɀɎƏɎƺȅƺȇɎ Ȓȇ Ɏǝƺ ƬȒȇɎǣȇɖƺƳ ȒȵƺȸƏɎǣȒȇ Ȓǔ ÁȸǣƬƏɀɎǣȇ ȸƺƏƬɎȒȸ ׏ ƏǔɎƺȸ Ɏǝƺ ȵɖƫǼǣƬ ǣȇȷɖǣȸɵ ɎȒ ƫƺ ǝƺǼƳ ǣȇ א ׎ א ׏ً Əɀ ȸƺȷɖǣȸƺƳ ƫɵ ǼƏɯِ EDF mobilised significant human resources to prepare for and carry out this ten-yearly outage. 5,000 personnel took part in this. This effort will need to be sustained for the long- term, as of 2020 for the fourth ten-yearly outages of ɖǕƺɵ ژ z¨¨ ȸƺƏƬɎȒȸɀ א ƏȇƳ ג ƏȇƳ ɖȇɎǣǼ א ׎ ב ׎ ǔȒȸ ɎǝƏɎ Ȓǔ Ɏǝƺ ǼƏɀɎ reactor of the Chinon NPP. «0JÈn ÁX…z z0á³ ڙ IȒɖȸɎǝ Ɏƺȇ ٮ ɵƺƏȸǼɵ ȒɖɎƏǕƺ Ȓǔ 0(I ȸƺƏƬɎȒȸɀ ي Ɏǝƺ ˡȸɀɎ Ȓȇƺ ƏɎ ÁȸǣƬƏɀɎǣȇ In 2019, EDF initiated its program of fourth ten-yearly outages for its 900 MWe reactors. Tricastin reactor 1 was thus shut down from 1 June to 23 December 2019. 2022 2021 2020 2019 10-YEARLY OUTAGE INSPECTION INTEGRATION OF CONCLUSIONS OF THE TRICASTIN 1 REACTOR REVIEW Public inquiry on the measures proposed by EDF in its review conclusions report EDF conclusions report for the Tricastin 1 periodic safety review ASN report to the Minister ASN regulation of continued operation by means of legally binding requirements 22 ASN Report on the state of nuclear safety and radiation protection in France in 2019