Development of probabilistic safety assessment focused on common-cause failure and risk

2015 Fiscal Year Final Research Report

• Project/Area Number: 25350490
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Social systems engineering/Safety system
• Research Institution: 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群)
• Principal Investigator: Yuge Tetsushi 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工, 電気情報学群, 教授 (50546041)
• Co-Investigator(Kenkyū-buntansha): YANAGI Shigeru 防衛大学校, 電気情報学群, 教授 (10546039)
• Research Collaborator: KITAGAWA Tomohiro ; MARUYAMA Megumi
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 共通原因故障 / 確率論的安全評価 / 信頼性 / 安全性 / リスク

Outline of Final Research Achievements

This study considered a probabilistic safety assessment and the optimal maintenance policy for safety related systems considering common-cause failures.
We obtained the following results;
(1) Improvement of calculation efficiency in evaluating the top event probability of dynamic fault trees considering common-cause failures. (2) Improvement of the coverage of alpha-factor method and estimation of errors in system failure probability. (3) Optimal maintenance policy for the system considering the availability and the cost.

Free Research Field

社会システム工学・安全システム