Underground laboratory of Meuse/Haute-Marne Studies on deep geological disposal necessitate research and experiments in an underground laboratory. Andra has been operating such an underground laboratory within the Bure municipality since 1999. In the context of the studies on the deep geological disposal, ASN issues recommendations concerning the research and experiments conducted in the laboratory, and ascertains by random sampling during follow-up inspections that they are carried out using processes that guarantee the quality of the results. Technical instructions Pursuant to the Act of 30 December 1991, and then pursuant to the Act of 28 June 2006 and the PNGMDR, Andra has carried out studies and submitted reports on deep geological disposal. These reports have been examined by ASN – referring in particular to the Safety Guide of 2008 - and it has issued an opinion on them. ASN has thus more specifically examined the reports submitted by Andra in 2005 and 2009. It issued opinions on these reports on 1 February 2006 and 26 July 2011. Andra subsequently submitted various files to ASN presenting the progress of the studies and work carried out. ASN issued a position statement: ∙ in 2013, on the documents produced between 2009 and 2013 – the year of the public debate – and on the intermediate design milestone at the outline stage presented by Andra in 2012; 8. Article R. 593‑14 of the Environment Code stipulates that “any person planning to operate a BNI can, before initiating the creation authorisation procedure, ask ASN for an opinion on all or part of the options it has retained to ensure protection of the interests mentioned in Article L. 593‑1. ASN, in an opinion issued and published in the conditions and forms determined by itself, specifies to what extent the safety options presented by the applicant are such as to prevent or limit the risks for the interests mentioned in Article L. 593.1 in view of the technical and economic conditions prevailing at the time. ASN may define the additional studies and justifications that will be required for a prospective DAC. It can set a validity period for its opinion. This opinion is communicated to the applicant and to the Minister responsible for nuclear safety”. ∙ in 2014, on the safety components of the closure structures and the expected content of the DOS of the facility; ∙ in 2015, on the control of operating risks and the cost of the project; ∙ in 2016, on the components development plan; ∙ in 2018, on the Cigéo DOS. The Cigéo Safety Options Dossier (DOS) The filing of a DOS marks the start of a regulatory process(8). ASN received the DOS for Cigéo in April 2016. At the end of the technical examination phase, the ASN draft opinion under– went public consultation, which took place from 1 August to 15 September 2017. After analysing the resulting contributions, ASN issued its opinion on 11 January 2018. ASN also sent a follow-up letter giving recommendations on the safety options to prevent or limit the risks and asked Andra for additional studies and justifications (corrosion phenomena, low-pH concretes, representativeness of the hydrogeological model, surveillance strategy, etc.). The demands made in this letter take into account the suggestions and comments received through the public consultation. The examination of the Cigéo DOS highlighted several issues relating to specific aspects (architecture, defining of hazards, postaccident management, etc.). Among these issues, ASN pointed out that the management of bituminised waste required special attention. UNDERGROUND LABORATORY RAMPS ZONE SHAFTS ZONE DOUBLE RAMPS SHAFTS HLW REPOSITORY ZONE Underground installations ILW-LL REPOSITORY ZONE SCHEMATIC DIAGRAM OF THE CIGÉO REPOSITORY SHOWING THE SURFACE AND UNDERGROUND FACILITIES ASN Report on the state of nuclear safety and radiation protection in France in 2022 367 • 14 • Radioactive waste and contaminated sites and soils 14 01 07 08 13 AP 04 10 06 12 03 09 05 11 02
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