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Title: Analysis of PWR RCS Injection Strategy During Severe Accident

Abstract

Reactor coolant system (RCS) injection is an important strategy for severe accident management of a pressurized water reactor (PWR) system. Maanshan is a typical Westinghouse PWR nuclear power plant (NPP) with large, dry containment. The severe accident management guideline (SAMG) of Maanshan NPP is developed based on the Westinghouse Owners Group (WOG) SAMG.The purpose of this work is to analyze the RCS injection strategy of PWR system in an overheated core condition. Power is assumed recovered as the vessel water level drops to the bottom of active fuel. The Modular Accident Analysis Program version 4.0.4 (MAAP4) code is chosen as a tool for analysis. A postulated station blackout sequence for Maanshan NPP is cited as a reference case for this analysis. The hot leg creep rupture occurs during the mitigation action with immediate injection after power recovery according to WOG SAMG, which is not desired. This phenomenon is not considered while developing the WOG SAMG. Two other RCS injection methods are analyzed by using MAAP4. The RCS injection strategy is modified in the Maanshan SAMG. These results can be applied for typical PWR NPPs.

Authors:
 [1];  [1];  [2]
  1. Institute of Nuclear Energy Research, Taiwan (China)
  2. Taiwan Power Company, Taiwan (China)
Publication Date:
OSTI Identifier:
20837854
Resource Type:
Journal Article
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 146; Journal Issue: 2; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0029-5450
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; CONTAINERS; CONTAINMENT; CREEP; MANAGEMENT; MITIGATION; NUCLEAR INDUSTRY; NUCLEAR POWER PLANTS; OUTAGES; PWR TYPE REACTORS; REACTOR ACCIDENTS; REACTOR COOLING SYSTEMS; RUPTURES; WATER

Citation Formats

Wang, S -J, Chiang, K -S, and Chiang, S -C. Analysis of PWR RCS Injection Strategy During Severe Accident. United States: N. p., 2004. Web.
Wang, S -J, Chiang, K -S, & Chiang, S -C. Analysis of PWR RCS Injection Strategy During Severe Accident. United States.
Wang, S -J, Chiang, K -S, and Chiang, S -C. 2004. "Analysis of PWR RCS Injection Strategy During Severe Accident". United States.
@article{osti_20837854,
title = {Analysis of PWR RCS Injection Strategy During Severe Accident},
author = {Wang, S -J and Chiang, K -S and Chiang, S -C},
abstractNote = {Reactor coolant system (RCS) injection is an important strategy for severe accident management of a pressurized water reactor (PWR) system. Maanshan is a typical Westinghouse PWR nuclear power plant (NPP) with large, dry containment. The severe accident management guideline (SAMG) of Maanshan NPP is developed based on the Westinghouse Owners Group (WOG) SAMG.The purpose of this work is to analyze the RCS injection strategy of PWR system in an overheated core condition. Power is assumed recovered as the vessel water level drops to the bottom of active fuel. The Modular Accident Analysis Program version 4.0.4 (MAAP4) code is chosen as a tool for analysis. A postulated station blackout sequence for Maanshan NPP is cited as a reference case for this analysis. The hot leg creep rupture occurs during the mitigation action with immediate injection after power recovery according to WOG SAMG, which is not desired. This phenomenon is not considered while developing the WOG SAMG. Two other RCS injection methods are analyzed by using MAAP4. The RCS injection strategy is modified in the Maanshan SAMG. These results can be applied for typical PWR NPPs.},
doi = {},
url = {https://www.osti.gov/biblio/20837854}, journal = {Nuclear Technology},
issn = {0029-5450},
number = 2,
volume = 146,
place = {United States},
year = {Sat May 15 00:00:00 EDT 2004},
month = {Sat May 15 00:00:00 EDT 2004}
}