Assessment of the anticipated improvement of the environmental footprint of future French nuclear energy systems

C. Poinssot (1) , S. Bourg (1) , J. Serp (1)

1 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

Environmental issues are nowadays a growing concern in the public opinion. It is therefore mandatory to propose relevant and qualified assessments of the overall environmental footprint of the different types of energy sources which are envisaged to be possibly implemented in future energy mixes. This question is particularly important for nuclear energy which suffers from a poor image in the public opinion due to the recent Fukushima accident. In this context, we developed a bespoke Life Cycle Assessment (LCA) tool, referred to as NELCAS, based on the current French nuclear energy system. Thanks to the Nuclear Safety and Transparency annual reports, detailed quantitative data are available for each of the fuel cycle facilities. The whole fuel cycle from ore-mining to geological repository was considered as well as data for construction, deconstruction of any plants, including the contribution of transports. All the matter and energy fluxes were considered and normalised versus the electric production. Key environmental indicators, such as land use, water withdrawal and consumption, gaseous releases, waste production as well as potential impact indicators (acidification, eutrophication) were hence assessed and validated with comparison with the few existing LCA results. This model was used to assess the respective figure of merits of the different generation of reactors and fuel cycles. In particular, it demonstrates that actinides recycling has a strong beneficial effect on the overall footprint due to the relative high impact of the front-end activities, specifically the ore mining. In the framework of a joint CEA-EDF-AREVA group, reference deployment scenario for the 4th generation reactors were developed for the French case based on both technical and economic considerations. The NELCAS tool was therefore used to assess the impact on the overall environmental footprint of this reference scenario.

Mots clés: Recycling; environmental footprint; life cycle assessment; strategy; 4th generation reactors

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]

C. Poinssot, S. Bourg, J. Serp. Assessment of the anticipated improvement of the environmental footprint of future French nuclear energy systems. International Conference on Fast Reactors and Related Fuel Cycles Next Generation Nuclear Systems for Sustainable Development (FR17), Jun 2017, Yekaterinburg, Russia. ⟨cea-02434563⟩