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Abstract

To a first approximation the overall radioactive source term released into the environment following a severe reactor accident can be considered as consisting of 3 successive stages:
fuel degradation and fission product release from the core region into the reactor coolant system;
transport, reaction and attenuation processes in the reactor coolant system and release into the containment;
aerosol retention and chemical reaction processes in the containment with the final release into the environment.

The aim of this report is to identify the chemical vapour reactions with surfaces and aerosols which have the most important impact on the transport, reaction, attenuation and retention processes of the radiologically important fission products, caesium, iodine and tellurium, in the primary reactor coolant system of a light water reactor in the extremely rare event of a severe core melt accident. It concentrates on phenomenology and experimental measuring methods and indicates which deficiencies exist in our knowledge. dge.

Additional information

Authors: RETTIG D, Forschungszentrum Rossendorf eV, Institut für Radiochemie, Dresden (DE);FUNKE H, Forschungszentrum Rossendorf eV, Institut für Radiochemie, Dresden (DE);HÜTTIG G, Forschungszentrum Rossendorf eV, Institut für Radiochemie, Dresden (DE);MERKER P, Forschungszentrum Rossendorf eV, Institut für Radiochemie, Dresden (DE);NEBELUNG C, Forschungszentrum Rossendorf eV, Institut für Radiochemie, Dresden (DE);ZÄNKER H, Forschungszentrum Rossendorf eV, Institut für Radiochemie, Dresden (DE);HUTTIG G, Forschungszentrum Rossendorf eV, Institut fur Radiochemie, Dresden (DE);ZANKER H, Forschungszentrum Rossendorf eV, Institut fur Radiochemie, Dresden (DE)
Bibliographic Reference: EUR 16503 EN (1995) 119pp., FS
Availability: Available from the European Commission, Mr G Cottone, DG XII-F-5, 200 rue de la Loi, B-1049 Bruxelles (BE)
ISBN: ISBN 92-827-4897-9
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