Abstracts ASN Report 2019

the data resulting from the monitoring of discharges led the ǼǣƬƺȇɀƺƺ ǣȇ א ׎׏ ژז ƏȇƳ א ׎׏ ژח ɎȒ ȸƺȵȒȸɎ ɀƺɮƺȸƏǼ ɀǣǕȇǣǔǣƬƏȇɎ ƺɮƺȇɎɀ to ASN relative to the presence of artificial radionuclides in the networks and in the stormwater coming from the facility. The treatment of these contaminations and stormwater management are covered by a CEA action plan, for which ASN has issued additional information requests. ¨ǼɖɎȒȇǣɖȅ ÁƺƬǝȇȒǼȒǕɵ IƏƬǣǼǣɎɵ ٢ Á¨ɖ٣ ƏȇƳ !ǝƺȅǣƬƏǼ ¨ɖȸǣˡƬƏɎǣȒȇ nƏƫȒȸƏɎȒȸɵ ٢n¨!٣ – CEA Centre Áǝƺ Á¨ɖ ٢ zX אבژ ٣ ȵȸȒƳɖƬƺƳ ȵǼɖɎȒȇǣɖȅ ٮ ƫƏɀƺƳ ǔɖƺǼ ƺǼƺȅƺȇɎɀ intended for fast neutron or experimental reactors as from ׏ והח ً Ɏǝƺȇً ǔȸȒȅ ׏ ژוזח ɖȇɎǣǼ ׏ וחח ً ǔȒȸ ȵȸƺɀɀɖȸǣɀƺƳ ɯƏɎƺȸ ȸƺƏƬɎȒȸɀ using mixed oxyde (MOX) fuel. The activities of the LPC ٢ zX גדژ ٣ ɯƺȸƺ ƏɀɀȒƬǣƏɎƺƳ ɯǣɎǝ ɎǝȒɀƺ Ȓǔ Ɏǝƺ Á¨ɖ ي ȵǝɵɀǣƬƏǼ ٮ chemical verifications and metallurgical examinations, treatment of effluents and contaminated waste. The ɎɯȒ ǔƏƬǣǼǣɎǣƺɀ ɯƺȸƺ ɀǝɖɎ ƳȒɯȇ ǣȇ א ׎׎ ژב ƏȇƳ Əȸƺ ƬɖȸȸƺȇɎǼɵ undergoing decommissioning. Removal of the waste and materials from the facilities continued in 2019. The decommissioning of the cryogenic waste processing unit of the LPC, as well as certain legacy waste repackaging and removal operations, have fallen behind schedule. ASN considers that the level of nuclear safety and radiation ȵȸȒɎƺƬɎǣȒȇ Ȓǔ Ɏǝƺ ǔƏƬǣǼǣɎǣƺɀ ǣȇ א ׎׏ ژח ǣɀ Ȓȇ Ɏǝƺ ɯǝȒǼƺ ɀƏɎǣɀǔƏƬɎȒȸɵِ Improvements are still required in the monitoring of the facility’s periodic checks and tests. xƏɀɖȸƬƏ ȸƺɀƺƏȸƬǝ ȸƺƏƬɎȒȸ – CEA Centre Áǝƺ xƏɀɖȸƬƏ ȸƺƏƬɎȒȸ ٢ zX חבژ ٣ً ɯǝȒɀƺ ƬȒȇɀɎȸɖƬɎǣȒȇ ɯƏɀ ƏɖɎǝȒȸǣɀƺƳ ƫɵ Ə (ƺƬȸƺƺ Ȓǔ ׏ (ژג ƺƬƺȅƫƺȸ ׏ ההח ً ɯƏɀ ǣȇɎƺȇƳƺƳ for neutron studies, chiefly on the cores of fast neutron reactors, and the development of neutron measurement techniques. The reactor has been shut down since 2007. The licensee is preparing the installation decommissioning file, which must be submitted before the end of December 2020, following the declaration of final shutdown of the installation Ȓȇ ב ׏ (ژ ƺƬƺȅƫƺȸ א ׎׏ ז ِ (ƺƬȒȅȅǣɀɀǣȒȇǣȇǕ ȵȸƺȵƏȸƏɎǣȒȇ ɯȒȸǸً such as asbestos removal from the premises, is in progress. The situation of the Masurca reactor in terms of nuclear safety ƏȇƳ ȸƏƳǣƏɎǣȒȇ ȵȸȒɎƺƬɎǣȒȇ ǣȇ א ׎׏ ژח ǣɀ ɀƏɎǣɀǔƏƬɎȒȸɵ Ȓȇ Ɏǝƺ ɯǝȒǼƺِ 1…n0 ƏȇƳ xǣȇƺȸɮƺ ȸƺɀƺƏȸƬǝ ȸƺƏƬɎȒȸɀ – CEA Centre The experimental ÉOLE and Minerve reactors are very-low- ȵȒɯƺȸ ٢Ǽƺɀɀ ɎǝƏȇ ׏ ژ ǸǣǼȒɯƏɎɎ٣ ƬȸǣɎǣƬƏǼ ȅȒƬǸ ٮ ɖȵɀ ɎǝƏɎ ɯƺȸƺ ɖɀƺƳ for neutron studies, in particular to evaluate the absorption of gamma rays or neutrons by materials. Áǝƺ 1…n0 ȸƺƏƬɎȒȸ ٢ zX אגژ ٣ً ɯǝȒɀƺ ƬȒȇɀɎȸɖƬɎǣȒȇ ɯƏɀ ƏɖɎǝȒȸǣɀƺƳ ƫɵ Ə (ƺƬȸƺƺ Ȓǔ ژבא hɖȇƺ ׏ דהח ً ɯƏɀ ǣȇɎƺȇƳƺƳ ȵȸǣȅƏȸǣǼɵ ǔȒȸ ȇƺɖɎȸȒȇ studies of moderated arrays, in particular those of pressurised water reactors and boiling water reactors. The Minerve reactor ٢ zX דחژ ٣ً ɯǝȒɀƺ ɎȸƏȇɀǔƺȸ ǔȸȒȅ Ɏǝƺ IȒȇɎƺȇƏɵ ٮ Əɖɴ «ٮ Ȓɀƺɀ ɀɎɖƳǣƺɀ centre to the Cadarache studies centre was authorised by Ə (ƺƬȸƺƺ Ȓǔ א ׏ ژ ³ƺȵɎƺȅƫƺȸ ׏ ווח ً ǣɀ ɀǣɎɖƏɎƺƳ ǣȇ Ɏǝƺ ɀƏȅƺ ǝƏǼǼ as the ÉOLE reactor. Teaching and research activities were carried out on these mock-ups until their final shutdown on ב ׏ (ژ ƺƬƺȅƫƺȸ א ׎׏ ו ِ ASN continued the examination of the decommissioning files for these reactors in 2019. Pending decommissioning, operations in preparation for decommissioning, such as the removal of radioactive and hazardous substances, took place in 2019. ASN considers that the level of nuclear safety and radiation ȵȸȒɎƺƬɎǣȒȇ Ȓǔ Ɏǝƺ 1…n0 ƏȇƳ xǣȇƺȸɮƺ ȸƺƏƬɎȒȸɀ ǣȇ א ׎׏ ژח ǣɀ Ȓȇ Ɏǝƺ whole satisfactory. ASN has nevertheless observed a drift in the schedule of certain decommissioning preparation operations, even though the licensee had given its commitment. In 2019, the licensee reported one significant event relative to the control of criticality. Áǝƺ ƺȇȸǣƬǝƺƳ ÈȸƏȇǣɖȅ ¨ȸȒƬƺɀɀǣȇǕ IƏƬǣǼǣɎǣƺɀ ٢ ÁÈƺ٣ – CEA Centre IȸȒȅ ׏ ژבהח ɎȒ ׏ דחח ً Ɏǝƺ ÁÈƺ ٢ zX אדژ ٣ ƬȒȇɮƺȸɎƺƳ ÈI 6 ژ ٢ɖȸƏȇǣɖȅ hexafluoride) from the enrichment plants into sinterable oxide, and ensured the chemical reprocessing of waste from the manufacture of fuel elements. Decommissioning of this facility was authorised by Decree in February 2006. The licensee is seriously behind schedule in these decommissioning operations, mainly due to the poor assessment of the radiological condition of the installation prior to the first decommissioning operations. On this account, ǣȇ א ׎׏׎ ژ Ɏǝƺ ǼǣƬƺȇɀƺƺ ȸƺȷɖƺɀɎƺƳ Ə ȅȒƳǣǔǣƬƏɎǣȒȇ ɎȒ ǣɎɀ ƳƺƬȸƺƺ to take account of the actual radiological condition of the installation, which led to several additional information requests. A new file must be submitted to provide clarifications on the characterisation of the final state and the planned steps to validate the in-depth clean-out of the facility. The only activities authorised today in the facility are the clean- out of the soils and the maintenance operations governed by periodic and regulatory checks. The level of nuclear safety and radiation protection of the ÁÈƺ ǔƏƬǣǼǣɎǣƺɀ ǣȇ א ׎׏ ژח ǣɀ Ȓȇ Ɏǝƺ ɯǝȒǼƺ ɀƏɎǣɀǔƏƬɎȒȸɵِ !ƺȇɎȸƏǼ IǣɀɀǣǼƺ xƏɎƺȸǣƏǼ áƏȸƺǝȒɖɀƺ ٢x!xI٣ – CEA Centre !ȸƺƏɎƺƳ ǣȇ ׏ זהח ً Ɏǝƺ x!xI ٢ zX בדژ ٣ ɯƏɀ Ə ɯƏȸƺǝȒɖɀƺ ǔȒȸ storing enriched uranium and plutonium until its final shutdown and the removal of all its nuclear materials on ב ׏ (ژ ƺƬƺȅƫƺȸ א ׎׏ ו ِ Áǝƺ ǼǣƬƺȇɀƺƺ ɀɖƫȅǣɎɎƺƳ ǣɎɀ ƳƺƬȒȅ ٮ missioning file in November 2018, and ASN is currently examining it. The decommissioning preparation operations, notably the chemical and radiological characterisations of the facility, continued in 2019. 90 ASN Report on the state of nuclear safety and radiation protection in France in 2019 REGIONAL OVERVIEWOF NUCLEAR SAFETY AND RADIATION PROTECTION ¨«…à0z!0 n¨0³ !ٳ ˆÁ0 ( ټ ñÈ«