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Coolant mixing in pressurized water reactors

Abstract

The behavior of PWRs during cold water or boron dilution transients is strongly influenced by the distribution of coolant temperature and boron concentration at the core inlet. This distribution is the needed input to 3-dimensional neutron kinetics to calculate the power distribution in the core. It mainly depends on how the plugs of cold or unborated water formed in a single loop are mixed in the downcomer and in the lower plenum. To simulate such mixture phenomena requires the application of 3-dimensional CFD (computational fluid dynamics) codes. The results of the simulation have to be validated against mixture experiments at scaled facilities. Therefore, in the framework of a research project funded by BMBF, the institute creates a 1:5 mixture facility representing first the geometry of a German pressurized water reactor and later the European Pressurized Water Reactor (EPR) geometry. The calculations are based on the CFD Code CFX-4. (orig.)
Publication Date:
Oct 01, 1998
Product Type:
Miscellaneous
Report Number:
FZR-238
Reference Number:
SCA: 210200; PA: DEN-99:0F8129; EDB-99:062016; SN: 99002106197
Resource Relation:
Other Information: PBD: Oct 1998; Related Information: Is Part Of Forschungszentrum Rossendorf, Institute of Safety Research. Annual report 1997; Weiss, F.P.; Rindelhardt, U. [eds.]; PB: 192 p.
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; PWR TYPE REACTORS; BORON; MIXING; THREE-DIMENSIONAL CALCULATIONS; VALIDATION; C CODES; COMPUTERIZED SIMULATION; MESH GENERATION; FLOW VISUALIZATION; MATHEMATICAL MODELS; FLOW MODELS; COOLANTS
OSTI ID:
352065
Research Organizations:
Forschungszentrum Rossendorf e.V. (FZR) (Germany). Inst. fuer Sicherheitsforschung
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE99750737; TRN: DE99F8129
Availability:
INIS; OSTI as DE99750737
Submitting Site:
DEN
Size:
pp. 1-6
Announcement Date:

Citation Formats

Hoehne, T, and Grunwald, G. Coolant mixing in pressurized water reactors. Germany: N. p., 1998. Web.
Hoehne, T, & Grunwald, G. Coolant mixing in pressurized water reactors. Germany.
Hoehne, T, and Grunwald, G. 1998. "Coolant mixing in pressurized water reactors." Germany.
@misc{etde_352065,
title = {Coolant mixing in pressurized water reactors}
author = {Hoehne, T, and Grunwald, G}
abstractNote = {The behavior of PWRs during cold water or boron dilution transients is strongly influenced by the distribution of coolant temperature and boron concentration at the core inlet. This distribution is the needed input to 3-dimensional neutron kinetics to calculate the power distribution in the core. It mainly depends on how the plugs of cold or unborated water formed in a single loop are mixed in the downcomer and in the lower plenum. To simulate such mixture phenomena requires the application of 3-dimensional CFD (computational fluid dynamics) codes. The results of the simulation have to be validated against mixture experiments at scaled facilities. Therefore, in the framework of a research project funded by BMBF, the institute creates a 1:5 mixture facility representing first the geometry of a German pressurized water reactor and later the European Pressurized Water Reactor (EPR) geometry. The calculations are based on the CFD Code CFX-4. (orig.)}
place = {Germany}
year = {1998}
month = {Oct}
}