Exploration for Reliability Calculation of Mechanical Equipment of Nuclear Power Plant

The reliability database for nuclear power plant can be enriched by calculation of specific equipment reliability using the design data, because current reliability data are almost statistical data for equipment class, while little for specific equipment. Based on reliability calculation steps of mechanical products, the strength-stress interference model used to calculate equipment reliability was researched, and the calculation formulae of reliability corresponding to different distribution functions were derived. The reliability for the claw of a nuclear power plant was calculated when it was broken in fracture failure mode. The research results show that the mechanical equipment reliability calculation for nuclear power plant by general steps of reliability analysis and calculation is suitable and the equipment reliability calculation by the strength-stress interference model is effective.