Radiological Pre-Characterisation for Decommissioning of L-54M Nuclear Research Reactor and Waste Management Strategy

CeSNEF L-54M (Nuclear Studies Centre Enrico Fermi) is a research reactor owned by Politecnico di Milano (POLIMI) that was shut down in 1979 and since then kept in safe storage condition. In 2014 POLIMI decided to proceed towards an active decommissioning strategy aiming towards a greenfield status. In the following paper, a discussion of the methodologies defined in the POLIMI pre-characterization campaign of the reactor Systems, Structures, and Components (SSC), and its waste management strategy will be discussed. The obtained plant data herein described provides useful references for similar decommissioning projects as they were utilized for the creation of benchmark analyses in two IAEA and OECD/NEA Collaborative Research Projects (GRAPA, DACCORD phase II).