换料水箱焊接见证件背弯开裂原因分析及处理

Cause analysis and handling for the cracks on the weld test coupon of refueling water storage tank during the root bend test

换料水箱在核电机组出现失水事故情况下为反应堆提供应急水源,导出反应堆内核燃料的剩余释热,承担着核电机组的安全功能。介绍了换料水箱底板边缘板焊接见证件的制作工艺、背弯试验方法与试验结果,分析见证件背弯开裂的原因,采取一定的控制措施重新制作见证件,并取双倍试样进行背弯试验,试验结果合格。

Refueling water storage tank in the nuclear power group, loss of coolant accident cases provide emergency water supply for the reactor, residual heat from the reactor core fuel, bear the security function of nuclear power unit. The refueling water storage tank bottom plate welding process, edge receive documents back and test results of bending test method, analysis reason documents back bent crack, taken certain measures to re create the certificate, and take double samples back bending test,the test results of qualified.