Community Research and Development Information Service - CORDIS


Severe, hypothetical accidents in light water reactors may lead to the release of radioactive material, mainly fission products, from the containment barriers. The knowledge of that release and of its evolution with time and as regards certain depletion phenomena is a major point for efficient accident management and emergency planning, as it allows an estimate of the source term, i.e. quantity and physical-chemical quality of radioactive releases to the environment. Consequently, the Phebus Fission Product (FP) programme has been agreed with the main objective of improving the understanding of FP physical and chemical behaviour i.e. their emission, transport and evolution in the primary circuit and containment. The experiments are designed to study also the degradation of high burn-up fuel, particularly during the later phases of the transient. The seminar presents the state of the art in LWR (light water reactor) source term evaluation, the needs for safety analysis and the lessons learned from relevant projects. The presentations outline the contributions and limitations of the Phebus-FP in solving identified problems and in providing a qualified database for the validation of code systems for the estimation of the source term during a postulated severe accident. Essential project features such as the instrumentation of tests and analytical support are illustrated.

Additional information

Bibliographic Reference: EUR 13520 EN (1992) 340 pp.
Availability: Elsevier Science Publishers Ltd., Crown House, Linton Road, Barking, Essex IG11 8JU (GB)
ISBN: ISBN 1-85166-765-2
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