原子力関連施設の安全性向上を目的としたライフサイクル情報の活用; 原子力関連施設の安全情報を活用した安全管理統合化システムの構築(先行基礎工学研究に関する共同研究報告書)

Application of Life-Cycle Information for Advancement in Safety of Nuclear Fuel Cycle Facilities; Application of Safety Information to Advanced Safety Management Support System

鈴木 和彦*; 石田 倫彦 

Suzuki, Kazuhiko*; Ishida, Michihiko

原子力関連施設の安全性を向上させるために、プラントライフサイクルを通じ、統合的安全管理が必要である。原子力関連施設では、危険評価情報、異常事象情報、保全履歴情報等多くの情報、知識がデータとして蓄積されているが、それらを有効に活用するためのモデル構築には至っていない。そこで本研究ではオントロジーの概念を導入し、各種安全情報を横断的に検索するシステムを構築した。同システムにより、設備異常の根原因を異種情報源から推定し、運転員に教示することが可能となった。

Risk management is major concern to Nuclear Fuel Cycle Facilities to improve plant and process reliability and ensure their safety. This is because we are required to predict potential risks before any accident or disaster occurs. The advancement of safety design and safety systems technologies showed large amount of useful safety-related knowledge that can be of great importance to plant operation to reduce operation risks and ensure safety. This research proposes safety knowledge modeling framework on the basis of ontology technologies to systematically construct plant knowledge model, which includes plant structure, operation, and the associated behaviors. In such plant knowledge model safety related information is defined and linked to the different elements of plant knowledge model. Ontology editor is employed to define the basic concepts and their inter-relations, which are used to capture and construct plant safety knowledge. In order to provide detailed safety knowledgebase, HAZOP results are analyzed and structured so that safety-related knowledge are identified and structured within the plant knowledgebase. The target safety knowledgebase includes: failures, deviations, causes, consequences, and fault propagation as mapped to plant knowledge. The proposed ontology-based safety framework is applied on case study nuclear plant to structure failures, causes, consequences, and fault propagation, which are used to support plant operation.