A Risk-based Framework for Operational Task Analysis at Nuclear Power Plants

Abstract

The paper presents a dynamic risk-based framework for operational task analysis at nuclear power plants. The dynamic operational risk assessment system is focused on the system configuration management and human error identification. The potential risk sources could be identified using a reliability/risk-based mapping scheme. The risks arising from system functional impairment and/or human errors are mapped out by the noteworthy difference between the curved timeline of average plant risk and point-in-time risk profile. The system modeling process is augmented with structural-functional perspective for facilitating Living Probabilistic Risk Assessment (Living PSA) update, analysis and management. The dynamic operational risk assessment framework forms a well-founded basis for development of Living PSA program and applications.