Community Research and Development Information Service - CORDIS


The specific programme "Nuclear Fission Safety 1994-1998", under the Euratom 4th Framework Programme, consisted of five research areas, each of them divided into a number of sub-areas. This EUR report contains the final summary reports of the 9 multi-partner research projects carried out in the sub-area B.1 "In-vessel Core Degradation and Coolability", which were grouped under a common "cluster" known as "INV".

It also contains an overview paper prepared by the EC Scientific Officers in charge of the cluster, with emphasis on the objectives, results and relevant achievements of the projects. Similar EUR reports have been produced for the other 6 clusters of projects of area B ("Reactor Safety"), namely "AGE", "EXV", "CONT", "ST", "AMM" and "INNO".

The main objective of area B.1 was to maintain vessel integrity in the unlikely severe accident scenario of contact with molten corium or debris beds and under the effect of possible corium/coolant interaction. The activities of the "INV" cluster were mainly devoted to:
- analysing late phase core degradation phenomena and corium interactions together with mitigating measures for LWRs;
- assessing initiating events in BWRs with a potential recriticality risk, like reflooding of a degraded core after early melting of the control rods;
- studying the response of the reactor pressure vessel under interaction with the above-mentioned corium, under a variety of boundary conditions such as in-vessel core retention and ex-vessel cooling, with emphasis on in-vessel steam explosion and high temperature creep failure mechanisms.

Additional information

Authors: ZURITA A, European Commission, DG Research, Brussels (BE);VAN GOETHEM G (EDITORS), European Commission, DG Research, Brussels (BE)
Bibliographic Reference: EUR 19960 EN (2002), 445pp. Euro: 68.00
Availability: EUR-OP reference: KI-NA-19960-EN-S Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-4794-X
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