Abstracts ASN Report 2019

Extension of the standard compacted waste package (CSD-C) storages areas In April 2017, Orano Cycle submitted a substantial modification authorisation application file with the aim of extending the CSD-C package storage areas. The public inquiry was held from ژד hɖȇƺ ɎȒ ژז hɖǼɵِ ³z ǣɀ ƬȒȇɎǣȇɖǣȇǕ Ɏǝƺ ƺɴƏȅǣȇƏɎǣȒȇ Ȓǔ Ɏǝǣɀ ǔǣǼƺِ FINAL SHUTDOWN AND DECOMMISSIONING OPERATIONS Áǝƺ ǔȒȸȅƺȸ Ȩ גٮא ׎׎ ژ ȵǼƏȇɎ ٢ zX בבژ ٣ ɯƏɀ ƬȒȅȅǣɀɀǣȒȇƺƳ ǣȇ ׏ ההח ƏȇƳ ǝƏɀ ƫƺƺȇ ƳƺǔǣȇǣɎǣɮƺǼɵ ɀǝɖɎ ƳȒɯȇ ɀǣȇƬƺ ׏ ژ hƏȇɖƏȸɵ א ׎׎ ג ِ Final shutdown also concerns three BNIs associated with Ɏǝƺ Ȩ גٮא ׎׎ ژ ȵǼƏȇɎ ي zX ژזבژ ٢³Á0 ژא ǣȇɀɎƏǼǼƏɎǣȒȇ ƏȇƳ Á׏ ژ ǔƏƬǣǼǣɎɵ٣ً zX וגژ ٢0n z XX ǔƏƬǣǼǣɎɵ٣ ƏȇƳ zX זژ ׎ ژ ٢R…ǔƏƬǣǼǣɎɵ٣ِ In 2019, ASN finalised the examination of the periodic safety ȸƺɮǣƺɯ ǔǣǼƺɀ ǔȒȸ zXɀ בב ً ژזב ƏȇƳ וג ِ ³z ȸƺɀȒǼɖɎǣȒȇ א ׎׏ ٮח ٮ!( ׎ ژבוה ǕȒɮƺȸȇǣȇǕ Ɏǝƺ ƬȒȇɎǣȇɖƏɎǣȒȇ Ȓǔ Ɏǝƺǣȸ ƳƺƬȒȅȅǣɀɀǣȒȇǣȇǕ ɯƏɀ ȵɖƫǼǣɀǝƺƳ Ȓȇ ژדא hɖȇƺ א ׎׏ ח ِ ASN continued its examination of the partial decommissioning ƏɖɎǝȒȸǣɀƏɎǣȒȇ ƏȵȵǼǣƬƏɎǣȒȇɀ ǔȒȸ zXɀ ژבב ƏȇƳ ژזב ɀɖƫȅǣɎɎƺƳ in April 2018. The schedule push-backs requested by the licensee lead to decommissioning completion deadlines in א ׎ ژהג ƏȇƳ א ׎ ژבג ǣȇɀɎƺƏƳ Ȓǔ א ׎ דב ً Ɏǝƺ ƬɖȸȸƺȇɎ ƳƺƏƳǼǣȇƺ ǔȒȸ Ɏǝƺ two BNIs. In early 2020, Orano must supplement firstly the ƳƺƬȒȅȅǣɀɀǣȒȇǣȇǕ ǔǣǼƺ ǔȒȸ zX ژבבژ ȸƺǕƏȸƳǣȇǕ Ɏǝƺ ƺǼǣȅǣȇƏɎǣȒȇ Ȓǔ ǣȇɎƺȸƏƬɎǣȒȇɀ ƫƺɎɯƺƺȇ Ɏǝƺ x ¨ɖ ǔƏƬǣǼǣɎɵ ƏȇƳ Ɏǝƺ ³Á׏ ژ ǔƏƬǣǼǣɎɵ ǣȇ the event of an earthquake by demolishing the upper storeys of the MAPu, and secondly its dissertation in response to the opinion of the Environmental Authority, before starting the public inquiry. ASN notes that the schedule push-backs requested are significant and largely due to the delays in legacy waste retrieval and packaging. Consequently, ASN will continue to monitor the management of these projects in 2020. LEGACY WASTE RETRIEVAL AND PACKAGING OPERATIONS Unlike the direct on-line packaging of waste, as is done with Ɏǝƺ ɯƏɀɎƺ ȵȸȒƳɖƬƺƳ ǣȇ Ɏǝƺ ȇƺɯ Ȩ זٮא ׎׎ ژ ƏȇƳ Ȩ ٮב ȵǼƏȇɎɀ at La Hague, the majority of the waste produced by the first Ȩ גٮא ׎׎ ژ ȵǼƏȇɎ ɯƏɀ ɀɎȒȸƺƳ ǣȇ ƫɖǼǸ ɯǣɎǝȒɖɎ ǔǣȇƏǼ ȵƏƬǸƏǕǣȇǕِ Áǝƺ operations to retrieve this waste are complex and necessitate deployment of substantial means. They present major safety and radiation exposure risks, which ASN monitors with particular attention. The retrieval of the waste contained in the old storage facilities of the La Hague site is also a prerequisite for the decommissioning and clean-out of these storage facilities. «ƺɎȸǣƺɮƏǼ ƏȇƳ ȵƏƬǸƏǕǣȇǕ Ȓǔ Ɏǝƺ ³Á0 ژא ɀǼɖƳǕƺɀ Áǝƺ Ȩ גٮא ׎׎ ژ ȵǼƏȇɎ ƺǔǔǼɖƺȇɎ ɎȸƺƏɎȅƺȇɎ ɀɎƏɎǣȒȇً ³Á0 א ً ɀƺȸɮƺƳ ɎȒ ƬȒǼǼƺƬɎ Ɏǝƺ ƺǔǔǼɖƺȇɎɀ ǔȸȒȅ Ɏǝƺ Ȩ גٮא ׎׎ ژ ȵǼƏȇɎً ɎȸƺƏɎ Ɏǝƺȅ ƏȇƳ store the precipitation sludges resulting from the treatment. Áǝƺ ³Á0 ژא ɀǼɖƳǕƺɀ Əȸƺ Ɏǝɖɀ ȵȸƺƬǣȵǣɎƏɎƺɀ ɎǝƏɎ ǔǣɴ Ɏǝƺ ȸƏƳǣȒǼȒǕǣƬƏǼ activity contained in the effluents and they are stored in seven silos. A portion of the sludges has been encapsulated in bitumen and packaged in stainless steel drums in the ³Á0 ژב ǔƏƬǣǼǣɎɵِ IȒǼǼȒɯǣȇǕ ³z ټ ɀ ƫƏȇȇǣȇǕ Ȓǔ ƫǣɎɖȅǣȇǣɀƏɎǣȒȇ ǣȇ 2008, Orano studied other packaging methods for the non- packaged or stored sludges. Áǝƺ ɀƬƺȇƏȸǣȒ ǔȒȸ Ɏǝƺ ȸƺɎȸǣƺɮƏǼ ƏȇƳ ȵƏƬǸƏǕǣȇǕ Ȓǔ Ɏǝƺ ³Á0 ژא ɀǼɖƳǕƺɀ ȵȸƺɀƺȇɎƺƳ ǣȇ א ׎׏׎ ژ ɯƏɀ ƫȸȒǸƺȇ ƳȒɯȇ ǣȇɎȒ Ɏǝȸƺƺ ɀɎƺȵɀ ي • ȸƺɎȸǣƺɮƏǼ Ȓǔ Ɏǝƺ ɀǼɖƳǕƺɀ ɀɎȒȸƺƳ ǣȇ Ɏǝƺ ɀǣǼȒɀ Ȓǔ ³Á0 ژא ٢ zX זבژ ٣ٕ • transfer and treatment, initially envisaged by drying and ƬȒȅȵƏƬɎǣȒȇً ǣȇ ³Á0 ژב ٢ zX ژ ׏׏ ז ٣ٕ • packaging of the resulting pellets in “C5” packages for sub- sequent disposal in a deep geological repository. ASN authorised the first phase of the work to retrieve the ³Á0 ژא ɀǼɖƳǕƺɀ ǣȇ א ׎׏ ژד ƏȇƳ Ɏǝƺ ƳƺƬȸƺƺ ƏɖɎǝȒȸǣɀǣȇǕ Ɏǝƺ ƬȸƺƏɎǣȒȇ Ȓǔ Ɏǝƺ ƺǔǔǼɖƺȇɎ ɎȸƺƏɎȅƺȇɎ ɀɎƏɎǣȒȇ ³Á0 ژב ɯƏɀ ȅȒƳǣǔǣƺƳ ƫɵ Ɏǝƺ (ƺƬȸƺƺ Ȓǔ ژחא hƏȇɖƏȸɵ א ׎׏ ה ً ɎȒ ƏǼǼȒɯ Ɏǝƺ ǣȅȵǼƺȅƺȇɎƏɎǣȒȇ Ȓǔ Ɏǝƺ ³Á0 ژא ɀǼɖƳǕƺ ɎȸƺƏɎȅƺȇɎ ȵȸȒƬƺɀɀِ Ɏ Ɏǝƺ ƺȇƳ Ȓǔ א ׎׏ ژו ǝȒɯƺɮƺȸً…ȸƏȇȒ !ɵƬǼƺ ǣȇǔȒȸȅƺƳ ³z ɎǝƏɎ Ɏǝƺ ȵȸȒƬƺɀɀ ƬǝȒɀƺȇ ǔȒȸ ɎȸƺƏɎǣȇǕ Ɏǝƺ ɀǼɖƳǕƺɀ ǣȇ ³Á0 ژב ƬȒɖǼƳ lead to difficulties in equipment operation and maintenance. Orano Cycle proposed an alternative scenario using ƬƺȇɎȸǣǔɖǕƏɎǣȒȇ ƏȇƳ ǣȇ ɖǕɖɀɎ א ׎׏ ژח ǣɎ ɀɖƫȅǣɎɎƺƳ Ə ³ƏǔƺɎɵ Options Dossier (DOS), which is however based on insufficiently substantiated hypotheses. An inspection held at the end of א ׎׏ ژח ɀǝȒɯƺƳ ɎǝƏɎ Ɏǝƺ ȵȸȒǴƺƬɎ ɯƏɀ ȇȒɎ ɀɖǔǔǣƬǣƺȇɎǼɵ ȅƏɎɖȸƺ for ASN to be able to give an opinion on this DOS. The DOS must be revised, particularly in the fundamental options of the project concerning effluent treatment, discharges into the environment and control of the fire risk. Silo 130 ³ǣǼȒ ׏ ב ׎ ژ ǣɀ Ə ȸƺǣȇǔȒȸƬƺƳ ƬȒȇƬȸƺɎƺ ɖȇƳƺȸǕȸȒɖȇƳ ɀɎȒȸƏǕƺ ǔƏƬǣǼǣɎɵً with carbon steel liner, used for dry storage of solid waste from the reprocessing of Gas-Cooled Reactor (GCR) fuels, and the storage of technological waste and contaminated soils and rubble. The silo received waste of this type as from ׏ בוח ً ɖȇɎǣǼ Ɏǝƺ ׏ זח ׏ ژ ǔǣȸƺ ɯǝǣƬǝ ǔȒȸƬƺƳ Ɏǝƺ ǼǣƬƺȇɀƺƺ ɎȒ ǔǼȒȒƳ the waste. The leak-tightness of the silo thus filled with water is today ensured only by a single containment barrier ƬȒȇɀǣɀɎǣȇǕ Ȓǔ Ə ɀɎƺƺǼ ٹ ɀǸǣȇ ٺ ِ ³ǣǼȒ ׏ ב ׎ ژ ǣɀ ȅȒȇǣɎȒȸƺƳ ƫɵ Ə ȇƺɎɯȒȸǸ of piezometers situated nearby. The scenario for retrieving and packaging this waste comprises four stages: • retrieval and packaging of the solid GCR waste; • retrieval of the liquid effluents; • retrieval and packaging of the residual GCR waste and the sludges from the bottom of the silo; • retrieval and packaging of the soils and rubble. Orano Cycle has built a retrieval unit above the pit containing the waste and a new building dedicated to the sorting and packaging operations. The first lowering of the gripper into the ASN Report on the state of nuclear safety and radiation protection in France in 2019 75 REGIONAL OVERVIEWOF NUCLEAR SAFETY AND RADIATION PROTECTION NORMANDIE