反应堆压力容器密封环国产化替代研究

Rearserch of Localization Substitution of Reactor Pressure Vessel Seal Ring

C型密封环是保证反应堆压力容器顶盖与筒体密封的核心部件,其密封性能直接关系到核电厂安全稳定运行。长期以来,C型密封环制造技术被外国公司垄断,单套售价高,供货周期长。通过密封特性试验、氦气检漏试验、水压试验和冷热循环试验,验证了国产C型密封环具备商用条件。通过功能影响分析论证了国产C型密封环的等效性。核电厂严控国产C型密封环安装质量,并通过在役水压试验、运行试验验证了国产C型密封环的性能,实现了国产C型密封环商用。

C-ring is the core part for seal of the reactor pressure vessel top cover and cylinder,and the sealing performance is directly related to the safety and stably operation of the nuclear power plant.For a long time,the manufacturing technology of C-ring was monopolized by foreign company,with high price and long supply cycle.It is verified that the C-ring made in China fulfill the commercial application,through sealing properties test,helium leak detection test,water pressure test and thermal-cold cycle test.The functional impact analysis proved the equivalence of the domesticated C-ring.The installation quality of domestic C-ring was strictly controlled in nuclear power plant,and the performance of the domestic C-ring was verified by the in-service hydraulic test and the running test.