マルコフ状態遷移モデルの2-out-of-4構成ディジタル原子炉停止系信頼性評価への応用

• 牟田 仁

  東京都市大学　工学部原子力安全工学科

書誌事項

タイトル別名

• Application of Markov State-Transition Model to Reliability Analysis of 2-out-of-4 Reactor Trip System
• マルコフ ジョウタイ センイ モデル ノ 2-out-of-4 コウセイ ディジタル ゲンシロ テイシケイ シンライセイ ヒョウカ エ ノ オウヨウ

抄録

Recently, digital instrumentation and control systems have been increasingly installed to the important safety features in nuclear power plants such as the reactor trip system and the actuation system of the engineered safety features. On the other hand, it has been found that it is difficult to model the digital equipment reliability in probabilistic risk assessment (PRA) by the conventional Fault Tree Analysis technique. The OECD/NEA CSNI Working Group of Risk Assessment (WGRisk) set up the task group DIGREL to discuss several issues including quantitative dynamic modeling. This paper shows that, taking account of the relationship among the reactor trip system failures, demand after the initiating event, detection of the reactor trip system fault by self-diagnostic or surveillance tests, repair of the failed reactor trip system components and plant shutdown operation by the plant operators as a stochastic process, the anticipated transient without scram (ATWS) event can be modeled by the event logic fault tree and Markov state-transition diagrams in the case of the 2-out-of-4 digital reactor trip system.

収録刊行物

• 日本原子力学会和文論文誌

  日本原子力学会和文論文誌 14 (1), 25-39, 2015

  一般社団法人 日本原子力学会

キーワード

• PRA
• reliability
• safety assessment
• digital instrumentation and control
• reactor trip system
• Markov state-transition model

詳細情報

• CRID: 1390001205186244864
• NII論文ID: 130004934195
• NII書誌ID: AA11643165
• DOI: 10.3327/taesj.j14.011
• ISSN: 21862931
• ISSN: 13472879
• NDL書誌ID: 026221339
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026221339
• 本文言語コード: ja
• データソース種別:
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  • NDL
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