“Deep rock is more stable than society”. The siting of repositories for high-level nuclear waste in Italy, Germany and France.

As national governments and international organizations strive to combat climate change and limit greenhouse gas emissions, the energy transition is at the center of the global agenda. Sustainable Development Goal (SDG) 7 of the UN 2030 Agenda calls for affordable, reliable, sustainable, and modern energy for all, but there is ample ambiguity on what is to be considered “sustainable” as opposed to “renewable.” This chapter discusses the role of nuclear power in this context, and more specifically the thorny issue of nuclear waste: unless a sustainable strategy for the disposal of nuclear waste is found, the inclusion of nuclear power as a legitimate recipient of Green Deal and other aid will be contested. The cases of Italy, Germany, and France are discussed, showing how these countries have struggled over decades to solve the “wicked problem” of nuclear waste and have dealt with conflict through different mixes of stakeholder engagement, procrastination, or use of scientific expertise for legitimation. Through the comparative analysis of the three cases, conclusions are drawn on relevant factors that contribute to the policy capacity needed to tackle complex, integrated, super-wicked problems of sustainability policy: issues of problem definition, multilevel coordination, time management, and the engagement of community and science are described and identified as critical.