Development of a Preliminary Performance Assessment Methodology for Design and Siting of a LLW Repository in Italy

A preliminary performance assessment (PA) analysis for the LLW Repository in Italy is described in this paper. In particular, the PA analysis of the so called SA site is reported. The AMBER code has been used for the setting up of radionuclides transport simulation model both in the near-field and geosphere. The performance assessment analysis preliminarily showed that the SA site was likely to be suitable, in geological and hydrogeological terms, for hosting a LLW Repository. Total dose to the critical group for both a normal evolution scenario and cover degradation scenario was 4.2 × 10−3 mSv/year, approximately one order of magnitude lower than the 10−2 mSv/year dose constraint adopted in this study.