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Severe reactor accidents involving core meltdown lead to the generation of a large quantity of radioactive aerosols and to its release into the reactor containment. The behaviour of an aerosol depends on the thermal hydraulics of the atmosphere in which it is suspended. It is now well established that there are several areas in which the thermal hydraulics and the fission product/aerosol behaviour may be significantly interdependent and that it is then basically incorrect to analyze them separately. To take account of the aerosol feedback on the atmosphere requires that the thermal hydraulic and aerosol calculations are coupled together rather than being run sequentially.

A new generation of computer codes has been developed in the last few years, designed for a coupled calculation of thermal hydraulic and aerosol processes. In this report, the status of the experimental work and code modelling in this area is reviewed and the lack of the present state of knowledge is summarized. Also the role of thermal hydraulic coupling with aerosol physics with respect to advanced reactor design is considered as well as in operating light water reactors (LWR). .

Additional information

Authors: BIEDER U, IKE Universität Stuttgart (DE);PALER A, IKE Universität Stuttgart (DE);SCHATZ A, IKE Universität Stuttgart (DE);DE ROSA F, ENEA, Bologna (IT);FYNBO P, RISO Laboratory (DK);JOKINIEMI J, VTT, Espoo (FI)
Bibliographic Reference: EUR 16504 EN (1995) 124pp., 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 92-827-4904-5
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