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This study has focused on fission product release and transport. It was intended to establish a common understanding of the state of knowledge and the main areas of uncertainty influencing fission products release and transport in Light Water Reactors severe accident conditions. This state-of-the-art review addresses the detailed assessment of key source term uncertainties in primary circuit transport and in particular in-vessel fission products release in severe accidents. Fission products and structural material release constitute the initial yet important part of the source term problem. The quantity, time-dependence and composition of fission product and structural materials released from the reactor core (or fuel rod bundle) may significantly influence fission product behaviour along the transport path, through the primary system and to the containment. Fission product release may also affect core heatup and/or degradation and later in-vessel or even ex-vessel accident phases. Overall conclusions and recommendations are given at the end of the report.

Additional information

Authors: HOCKE K D, Universität Stuttgart (DE);SCHATZ A, Universität Stuttgart (DE);ADROGUER B, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);SHEPHERD I, JRC Ispra (IT)
Bibliographic Reference: EUR 16499 EN (1995) 65pp., FS, free of charge
Availability: Available from the European Commission, Mr G Cottone, DG XII-F-5, 200 rue de la Loi, B-1049 Bruxelles (BE)
ISBN: ISBN 92-827-5278-X
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