Book/Report

FZJ-2016-05858

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Source term estimation for small sized HTRs

Moormann, R. (Corresponding author)FZJ*

1992
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12717

Report No.: Juel-2669

Abstract: A survey on methods and data relevant for source term estimations of modern small HTRs, which are equipped with a high safety standard, is given. Accidents which have to be considered are core heat-up, reactivity transients, water or air ingress and primary circuit depressurization. The main effort of this paper belongs to water/air ingress and depressurization, which requires consideration of fission product plate out under normal operation conditions ; for the latter it is clearly shown, that absorption (penetration) mechanisms are much less important than assumed sometimes in the past. Source term estimation procedures for core heat-up events are shortly reviewed ; reactivity transients are apparently covered by them. Besides a general literature survey including identification of areas with insufficient knowledge this paper contains some estimations on the thermochemical behaviour of fission products in water and air ingress accidents. Typical source term examplesare also presented. In an appendix, evaluations of the AVR experiments VAMPYR-I and -II with respect to plate out and fission product filter efficiency are outlined and used for a validation step of the new plate out code SPATRA.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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