Quantitative Evaluation of Physical Protection System in Nuclear Power Plant

Based on the prompt detection analysis,this paper introduced one analysis model of intrusion path in nuclear power plant by means of morphology analysis and developed the evaluation software for path model analysis of physical protection system. Quantitative analysis on three elements （detection, delay, and response） of physical protection system was presented with an imaginary intrusionevent example in Mac Ar-thur nuclear center. The results indicated that the path prompt detection analysis worked effectively to find the weak point of the physical protection system in NPP,and meantime we can also get the high cost-effectiveness improved measures. It is an effective approach to evaluate the overall performance of the system.