Studies are under way in Switzerland to investigate various aspects of the geological disposal of radioactive waste. This report presents the results of the international peer review organised by the OECD Nuclear Energy Agency (NEA) on behalf of the Swiss Federal Office of Energy (BFE) of a post-closure radiological safety assessment prepared by Nagra for geological disposal of spent fuel (SF), vitrified high-level waste (HLW) and long-lived intermediate-level waste (ILW) within the Opalinus Clay of the Zürcher Weinland in northern Switzerland.