Cigeo

Cigeo
Name	Cigeo
Location	Meuse/Haute-Marne
Country	France
Status	Proposed
Owner	Andra
Type	Deep geological repository
Disposal	High-level waste, Intermediate-level long-lived waste
Start	planned 2035

Cigeo Cigeo is a planned deep geological repository for high-level and intermediate-level long-lived radioactive waste sited in the Meuse/Haute-Marne department of northeastern France, proposed and managed by the National Radioactive Waste Management Agency Andra, and involving technical, regulatory, political, and environmental interfaces with institutions such as EDF, CEA, and the European Commission. The project interfaces with regional administrations like Grand Est, national ministries such as the Ministry of Ecological Transition (France), and international frameworks including the International Atomic Energy Agency, the Organisation for Economic Co-operation and Development, and the European Atomic Energy Community. Cigeo’s planning and licensing have engaged legal bodies such as the Conseil d'État, scientific bodies like the Académie des sciences (France), and advocacy groups including Greenpeace and Sortir du nucléaire.

Overview

The project was developed by Andra following missions and studies involving the CEA, operators such as EDF and Orano, and oversight by regulators like the Autorité de sûreté nucléaire; its goals align with national policies codified in laws such as the French radioactive waste law of 2006 and debated in bodies including the French National Assembly and the Senate of France. Cigeo aims to provide long-term management for spent fuel residues produced by reactors such as CP0, CP1, CP2, and future reactors including EPR, and to coordinate with international projects like Onkalo in Finland and Yucca Mountain in the United States as comparative frameworks for deep geological disposal studied by organizations like the NEA and the IAEA.

Site selection and geology

Andra selected sites near the municipalities of Bure and Havrincourt within the Meuse and Haute-Marne departments after multi-disciplinary surveys involving geologists from institutions such as the BRGM and universities like Université de Lorraine and Université de Paris. The chosen Callovo-Oxfordian clay formation was characterized through boreholes, logging, and laboratory experiments involving research centers like CEA and the CNRS to assess hydrogeology, geochemistry, and mechanical properties; these studies referenced analogues such as the Boom Clay and datasets compared with research at Mont Terri Rock Laboratory and the Äspö Hard Rock Laboratory. Site appraisal processes were conducted under French legal instruments including the Code de l'environnement and international standards from the ISO and the IAEA.

Project design and facilities

Cigeo’s design integrates underground galleries, surface facilities, and engineered barriers developed by industrial partners like Andra, EDF, Orano, and constructors including VINCI and Bouygues. The repository layout contemplates long horizontal galleries and shafts with waste packages emplaced in cells using buffer materials such as bentonite studied by materials scientists at CEA and laboratories like CEA Saclay; supporting infrastructure plans include ventilation, waste handling, and monitoring systems leveraging technologies from firms such as Areva (now part of Orano). Design reviews and safety cases have been examined by regulatory bodies like the ASN and peer-reviewed by international experts from organizations including the IAEA and the OECD/NEA.

Radioactive waste types and inventory

The inventory includes high-level vitrified waste from reprocessing of spent fuel from reactors operated by EDF and research reactors managed by CEA, and intermediate-level long-lived wastes from fuel cycle facilities such as La Hague and legacy materials from uranium mining and defense programs associated with the Commissariat à l'énergie atomique. Waste classification follows French definitions established in legislation such as the 2006 Planning Act and is compared with categorizations used by the IAEA and the European Commission. Estimates of radiological inventory have involved modeling teams at Andra, academic partners like Université de Lorraine, and international comparisons with repositories like Onkalo and past proposals such as WIPP.

Safety, regulation, and environmental assessment

Cigeo’s safety case addresses containment, isolation, and long-term evolution scenarios evaluated under oversight by the ASN, with environmental impact assessments submitted to prefectural authorities and examined by consultative bodies including the CNDP (Commission nationale du débat public). Modeling and monitoring programs include participation from research institutions such as CNRS, CEA, and the BRGM and have been analyzed in international review forums of the IAEA and the OECD/NEA. Legal challenges and appeals have been heard by administrative courts and ultimately referenced in judgements from the Conseil d'État; environmental advocates including France Nature Environnement and international NGOs such as Greenpeace have contested elements of the assessment.

Timeline, costs, and funding

Project timelines project phased construction and operation beginning with pilot operations in the 2020s and industrial operation planned in the 2030s, with decommissioning and monitoring extending over centuries; milestones have been reported by Andra and debated in the French Parliament. Cost estimates have been produced by Andra and audited by bodies such as the Cour des comptes, with financing arrangements involving contributions from nuclear operators EDF and Orano under statutory producer-pays mechanisms embedded in French legislation and overseen by ministries including the Ministry of Economy and Finance (France). International comparisons draw on cost and schedule data from projects like Onkalo, Yucca Mountain, and WIPP.

Public perception and controversies

Public debate has involved local municipal councils in Bure and regional actors in Grand Est, national political parties represented in the Assemblée nationale, environmental organizations such as Greenpeace and Sortir du nucléaire, and academic critics from institutions like Université de Lorraine. Controversies encompass land use disputes, protest movements linked to groups such as ZAD, litigation in administrative courts, and media scrutiny by outlets including Le Monde and Le Figaro, while proponents highlight technical assessments by Andra and endorsements by scientific committees such as the Académie des sciences (France). The debate continues to engage European entities including the European Commission and international reviewers from the IAEA and the OECD/NEA.

Category:Nuclear waste repositories