Research of Containment Leakage for Marine Nuclear Power Platform

The purpose of this paper is to clarify the overall and local leakage rates of the Marine reactor containment, establish the containment seal test acceptance criteria, and support the analysis of airborne radioactive material concentration in the compartments around the containment. Based on the containment seal test standard of onshore nuclear power plants, the leakage rate index allocation, leakage rate calculation and feasibility analysis of Marine Nuclear Power Platform (MNPP) were carried out through the general idea of "standard analysis-proposed index-verification index". The study showed that the overall leakage rate of the containment of the MNPP was proposed about 3‰/24h, and the leakage rate distribution of the penetration parts of Class B and C accounted for 10% and 50% of the overall leakage rate respectively under the condition of the design accident. During the sealing test phase, the overall leakage rate of the containment should consider 25% of the design margin. The results of numerical analysis and calculation of containment leakage of the MNPP meet the requirements of index and have a good design margin, which is of great reference value for the establishment of containment sealing test acceptance criteria.