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针对现有成熟并广泛采用的控制棒驱动机构(CRDM)管座与反应堆压力容器封头连接结构形式及制造工艺,分析反应堆压力容器水压试验后CRDM管座垂直度变大现象及管座受损后的可更换性问题,基于影响CRDM管座垂直度变化及制约管座更换的关键因素,对管座与封头连接结构进行设计改进,改进后的连接结构可有效解决垂直度控制难题并降低管座更换难度。
In view of the existing mature and widely used control rod drive mechanism (CRDM) and reactor pressure vessel head connection structure and manufacturing process, analysis of reactor pressure vessel CRDM pipe after the vertical increase in pressure test and seat Based on the key factors that affect the verticality of CRDM tube seat and the tube seat replacement, the connection design of the tube seat and the head is improved. The improved connection structure can effectively solve the problem of verticality control Reducing the difficulty of socket replacement.