CLADS research for Fukushima Daiichi as contribution for the SAFEST Severe Accident Research Programme

SAFEST (Severe Accident Facilities for European Safety Targets) is a 54- month EURATOM FP7-supported European Integrated Research Infrastructure Initiative for increased safety of nuclear systems at EU level with 8 European members and CLADS/JAEA, Japan. It has the aim of organizing member’s facilities to make co-ordinated planning and experimentation in severe accident research based upon the most recent evaluation of the current research priorities. There are currently 19 high priority issues relating to the behaviour of the melted material (corium). The research areas involved are: In-vessel corium and debris behaviour, Ex-vessel corium & debris behaviour and Corium properties.
This presentation will describe CLADS/JAEA contribution which is the JAPAN corium research road-map prepared under SAFEST and some of experimental facilities being developed by the CLADS/JAEA and other partners of particular relevance to its Fukushima Dai-Ichi decommissioning and remediation operational support. It will also give the first results of this research work particularly for B4C behaviour in the bundle and concrete corium interactions and its implications for the degradation in units 1-3 at Fukushima Dai-Ichi.