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Source term estimation for small sized HTRs

Technical Report:

Abstract

Accidents which have to be considered are core heat-up, reactivity transients, water of 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 plateout 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 thermomechanical behaviour of fission products in water in air ingress accidents. Typical source term examples are also presented. In an appendix, evaluations of the AVR experiments VAMPYR-I and -II with respect to plateout and fission product filter efficiency are outlined and used for a validation step of the new plateout code SPATRA. (orig.).
Authors:
Publication Date:
Aug 01, 1992
Product Type:
Technical Report
Report Number:
Juel-2669
Reference Number:
SCA: 220900; 210300; PA: DEN-93:000911; SN: 93000924970
Resource Relation:
Other Information: PBD: Aug 1992
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; PEBBLE BED REACTORS; REACTOR ACCIDENTS; SOURCE TERMS; HTGR TYPE REACTORS; MODULAR STRUCTURES; FISSION PRODUCT RELEASE; INVENTORIES; AIR FILTERS; RADIOACTIVE AEROSOLS; 220900; 210300; REACTOR SAFETY; POWER REACTORS, NONBREEDING, GRAPHITE MODERATED
OSTI ID:
10116604
Research Organizations:
Forschungszentrum Juelich GmbH (Germany). Inst. fuer Sicherheitsforschung und Reaktortechnik
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE93758630; TRN: DE9300911
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
80 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Moormann, R. Source term estimation for small sized HTRs. Germany: N. p., 1992. Web.
Moormann, R. Source term estimation for small sized HTRs. Germany.
Moormann, R. 1992. "Source term estimation for small sized HTRs." Germany.
@misc{etde_10116604,
title = {Source term estimation for small sized HTRs}
author = {Moormann, R}
abstractNote = {Accidents which have to be considered are core heat-up, reactivity transients, water of 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 plateout 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 thermomechanical behaviour of fission products in water in air ingress accidents. Typical source term examples are also presented. In an appendix, evaluations of the AVR experiments VAMPYR-I and -II with respect to plateout and fission product filter efficiency are outlined and used for a validation step of the new plateout code SPATRA. (orig.).}
place = {Germany}
year = {1992}
month = {Aug}
}