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PWR-depressurization and its hydraulic analogy

Kedziur, F. and Moussiopoulos, N. and Schumann, U. and Stölting, K. (1978) PWR-depressurization and its hydraulic analogy. Nuclear Engineering and Design, 47, pp. 25-34. DOI: 10.1016/0029-5493(78)90002-X

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Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/505661/description#description

Abstract

The aim of this work is to provide an experimental verification of codes to be used for numerical simulation of the depressurization process in a pressurized water reactor (PWR) in case of a hypothetical blowdown accident. Here, the downcomer of a PWR is approximately treated as a two-dimensional plane region (unwrapped). The flow is simulated experimentally using the hydraulic analogy of free surface waves in a shallow water bed and compared to numerical simulations for the analogous flow of an ideal gas with an isentropic coefficient equal to two. The differences between the results of both models are less than 10%. Also reported are results of a similar study for a one-dimensional case (depressurization in a pipe). The depressurization process can be subdivided into three phases: (1) Fluid still at rest, smooth depressurization wave, pressure drops, (2) Fluid accelerates, pressure recovers near the outlet (in 2-dim. case), (3) Quasi-steady flow, oscillations (in 2-dim. case). It is suggested that the results serve as a bench-mark for blow-down accident analysis codes.

Item URL in elib:https://elib.dlr.de/53583/
Document Type:Article
Title:PWR-depressurization and its hydraulic analogy
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kedziur, F.Kernforschungszentrum KarlsruheUNSPECIFIED
Moussiopoulos, N.Kernforschungszentrum KarlsruheUNSPECIFIED
Schumann, U.Kernforschungszentrum KarlsruheUNSPECIFIED
Stölting, K.Kernforschungszentrum KarlsruheUNSPECIFIED
Date:1978
Journal or Publication Title:Nuclear Engineering and Design
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:47
DOI :10.1016/0029-5493(78)90002-X
Page Range:pp. 25-34
Status:Published
Keywords:pressurized water reactor
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: Freund, Jana
Deposited On:26 Nov 2008
Last Modified:31 Jul 2019 19:21

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