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Abstract

Following a light water reactor (LWR) severe accident with release of radioactive compounds from the fuel, radionuclide retention in the form of aerosols, both in the reactor coolant system and the containment, is the result of deposition and resuspension phenomena. While the current understanding of deposition mechanisms is generally judged to be adequate, the significance of mechanical resuspension of deposited particles from surfaces has not been clearly established. Aerosol particles deposited onto the wet reactor vessel internals and the coolant pipework can be resuspended in certain circumstances as can dry aerosols deposited on the walls in the containment environment. Computer codes used in the past for radioactive source term calculations have no models for aerosol resuspension. Effective aerosol retention capabilities of components where fast flows may occur is still under debate. This report discusses the current situation on these phenomena and proposes future experimental work to more fully interpret the complexity of the mechanisms involved.

Additional information

Authors: PAROZZI F, ENEL, Nuclear Department, Milano (IT);ALONSO A, Universidad Politecnica de Madrid (ES);BOLADO R, Universidad Politecnica de Madrid (ES);HONTANON E, Universidad Politecnica de Madrid (ES);CAPITAO J A, JRC Ispra (IT);DROSSINOS Y, JRC Ispra (IT)
Bibliographic Reference: EUR 16505 EN (1995) 76pp., 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 92-827-4896-0
Record Number: 199512003 / Last updated on: 1995-12-11
Category: PUBLICATION
Original language: en
Available languages: en
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