Application to Vital Areas Identification of Nuclear Power Plants Based on PSA

Vital Area Identification (VAI) is the process for identifying areas containing nuclear materials, structures, systems or components to be protected from sabotage, which could directly or indirectly lead to unacceptable radiological consequences. Procedures of Vital area identification (VAI) based on Probabilistic Safety Assessment (PSA) which is one of the base techniques for physical protection regulation is developed. Traditionally, the physical protection of safety-critical systems has been a boundary protection of systems. In addition to the boundary protection, the protection of vital areas such as building and areas inside the facility boundary has been introduced as an active physical protection. Under this situation, the vital area identification (VAI) methodology is the base technology for the physical protection regulation. (author)