Statistical overpower penalty calculation system for generic thermal margin analysis model

A statistical overpower penalty calculation system for a generic thermal margin analysis model adjusting a thermal margin of a nuclear power plant using an overpower penalty calculated through a statistical method, the system comprising:

• a random number generating unit arbitrarily generating a plurality of random numbers;
• a power distribution generating unit generating power information of an axial direction and a radial direction for a core burnup;
• an operating condition generating unit extracting an arbitrary value for a plurality of operating conditions from the random numbers generated in the random number generating unit;
• a power operating limit (POL) calculating unit calculating a POL of a reload core thermal margin analysis model and a POL of a generic thermal margin analysis model and calculating a plurality of the overpower penalties through the POL of the reload core thermal margin analysis model and the POL of the generic thermal margin analysis model;
• and
• a statistics processing unit calculating tolerance limit values according to the core burnup by statistically analyzing a distribution formed of the plurality of the overpower penalties and selecting a smallest tolerance limit value among the tolerance limit values as a representative value of the overpower penalties by comparing the tolerance limit values to each other,
• wherein the system adjusts the thermal margin of the nuclear power plant by reflecting the representative value in a calculation of the thermal margin.