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Title: Transient Xenon Effect on Plant Control in MSRs - Validation of Simulation Model -

Abstract

Molten Salt Reactors (MSRs) are fluid fuel-type thermal reactors moderated by graphite. MSRs have been expected as the generation IV nuclear power plants for many advantages such as high potential in safety and so on. On the other hand, as the MSRs are thermal reactors the poison behavior of xenon during operation can't be ignored due to large thermal neutron absorption cross-section of xenon. In the Molten Salt Breeder Reactor (MSBR) studied by ORNL, it is designed to continuously extract xenon using helium bubble injection system. However there are few researches of transient xenon behavior with relation to reactor control, especially during power changes. From this point of view, the authors developed a digital simulator based on the analog simulator for MSBR used for analysis of control system by ORNL. We have added the program for transient xenon calculation model to it and have studied of the influence of xenon on reactivity control during various transient. It takes into account of xenon behavior to migrate into the graphite moderator and the extraction from the fuel salt. As the results of analysis, it was shown that remodeled simulator was valid. Also it was suggested that the xenon extraction would be increasedmore » to reduce transient xenon swing or the reactivity worth of control rods would be increased to override the xenon buildup reactivity. (authors)« less

Authors:
;  [1]
  1. Graduate School of Engineering, Hokkaido University, Kita13, Nishi8, Kita-ku, Sapporo (Japan)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
21160574
Resource Type:
Conference
Resource Relation:
Conference: ICAPP'04: 2004 international congress on advances in nuclear power plants, Pittsburgh, PA (United States), 13-17 Jun 2004; Other Information: Country of input: France; 3 refs; Related Information: In: Proceedings of the 2004 international congress on advances in nuclear power plants - ICAPP'04, 2338 pages.
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ABSORPTION; BREEDER REACTORS; CONTROL; CONTROL ELEMENTS; CONTROL SYSTEMS; EXTRACTION; GRAPHITE; HELIUM; MOLTEN SALT REACTORS; MOLTEN SALTS; NUCLEAR POWER PLANTS; REACTIVITY; SIMULATION; SIMULATORS; THERMAL NEUTRONS; THERMAL REACTORS; TRANSIENTS; VALIDATION; XENON

Citation Formats

Katsumi, Suzuki, and Yoichiro, Shimazu. Transient Xenon Effect on Plant Control in MSRs - Validation of Simulation Model -. United States: N. p., 2004. Web.
Katsumi, Suzuki, & Yoichiro, Shimazu. Transient Xenon Effect on Plant Control in MSRs - Validation of Simulation Model -. United States.
Katsumi, Suzuki, and Yoichiro, Shimazu. Thu . "Transient Xenon Effect on Plant Control in MSRs - Validation of Simulation Model -". United States.
@article{osti_21160574,
title = {Transient Xenon Effect on Plant Control in MSRs - Validation of Simulation Model -},
author = {Katsumi, Suzuki and Yoichiro, Shimazu},
abstractNote = {Molten Salt Reactors (MSRs) are fluid fuel-type thermal reactors moderated by graphite. MSRs have been expected as the generation IV nuclear power plants for many advantages such as high potential in safety and so on. On the other hand, as the MSRs are thermal reactors the poison behavior of xenon during operation can't be ignored due to large thermal neutron absorption cross-section of xenon. In the Molten Salt Breeder Reactor (MSBR) studied by ORNL, it is designed to continuously extract xenon using helium bubble injection system. However there are few researches of transient xenon behavior with relation to reactor control, especially during power changes. From this point of view, the authors developed a digital simulator based on the analog simulator for MSBR used for analysis of control system by ORNL. We have added the program for transient xenon calculation model to it and have studied of the influence of xenon on reactivity control during various transient. It takes into account of xenon behavior to migrate into the graphite moderator and the extraction from the fuel salt. As the results of analysis, it was shown that remodeled simulator was valid. Also it was suggested that the xenon extraction would be increased to reduce transient xenon swing or the reactivity worth of control rods would be increased to override the xenon buildup reactivity. (authors)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {7}
}

Conference:
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