蒸汽发生器上部水平支承垫条及其间隙测量与调整程序优化改进

Technical Improvement of Shims and Its Procedure for Gap Measurement and Adjustment for CPR1000 Steam Generator Upper Horizontal Support

以中国改进型压水堆1000 MW核电站(CPR1000)蒸汽发生器(SG)为对象,分析SG上部水平支承垫条产生热膨胀弯曲变形后间隙测量值与实际间隙值不一致的原因,给出垫条结构的改进措施。另外,为方便间隙测量,对支承间隙测量与调整程序进行了优化改进,解决了SG上部水平支承垫条间隙测量和调整过程中存在的诸多困难,达到了简化操作的目的。

Taking China Modified Pressure Reactor 1000 MW nuclear electrical station （ CPR1000 ） steam generator（SG） as an example, the origin for the difference between gap measured and real gap for the thermal expansion of SG upper horizontal support is analyzed, and the optimized schemes ware proposed to improve the shim structure and the procedure about gap measurement and adjustment. The results show that the scheme is an effective way to solve the difficulties met during gap measurement and adjustment.