[2G10-14] Emergency Preparedness/Risk Management

[2G12] Study on Safety Function Reliability Evaluation and Risk Management during the Decommissioning of Accident-Damaged Nuclear Power Plant - Based on the Results of Confinement Function Reliability Evaluation -

*Takayuki Aoki¹, Junya Masuko², Takayuki Negishi³ (1. Tohoku University, 2. The Japan Atomic Power Company, 3. Nuclear Engineering and Services Company)

Keywords:accident-damaged reactor, nuclear decommissioning, safety functions, confinement function, radioactive material release frequency, PRA

We focused on a negative pressure control system for primary containment vessel and reactor building during implementing fuel debris retrieval, evaluated its reliability, and based on the evaluation results, considered how the safety management for nuclear decommissioning should be.