Preparatory Study on Analysis of Fuel Debris (PreADES) Project
Joint project

The Preparatory Study on Analysis of Fuel Debris (PreADES) project and the Analysis of information from Reactor buildings and Containment vessels of Fukushima Daiichi Nuclear Power Station (ARC-F) project were recommended as near-term projects by the Senior Expert Group on Safety Research Opportunities Post-Fukushima (SAREF). The main objectives of PreADES are to collect information for improving knowledge and methodologies for fuel debris characterisation that will support future fuel debris sampling analysis at Fukushima Daiichi units 1-3, to identify the needs for fuel debris analyses that will contribute to the decommissioning of the Fukushima Daiichi plant and deepen the knowledge base on severe accidents, and to prepare a future international R&D framework on fuel debris analysis.

The PreADES project extends from 2017 to 2021, and includes fifteen participants from seven countries and the EC Joint Research Center. (Canada(CNL), France(CEA IRSN EDF), Japan(JAEA NRA CRIEPI), Korea(KAERI KINS), Sweden(SSM), Switzerland(PSI), United States(NRC DOE EPRI) , EC/JRC) The project contains 3 tasks. First, a joint study on fuel debris characterization is to discuss fuel debris location in 1F unit 1-3 and debris properties in location. Second, identification and issues discussion for future fuel debris analysis is to discuss needs for analysis, from decommissioning point of view; criticality, containment, cooling function, radiation exposure, and major issues for sampling such as analysis methods, facility demands, transportation, accounting, and hot testing facilities including capable of fuel debris analysis. The last task is to plan the future international R&D framework for collaboration on fuel debris.


Canada, European Commission, France, Japan, Korea, Sweden, Switzerland and United States.

Project period

December 2017 - December 2021


EUR 275 K