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介绍了核电站主蒸汽系统隔离阀抱箍螺栓断裂的过程和状态,分析了抱箍螺栓失效问题的原因及其各项力学性能的检测,给出了改进抱箍螺栓性能的制造工艺、材料选择及预防措施。
This paper introduces the process and the status of the fracture of the hoop bolts of the isolation valve of the main steam system of the nuclear power plant. The causes of failure of the hoop bolts and the detection of their mechanical properties are analyzed. The manufacturing process, materials selection and material selection of the hoop bolts are given Precaution.