核电厂反应堆水池普遍采用不锈钢覆面结构,在建造和运行期间均发生过泄漏现象。从覆面结构特点出发,开展了覆面焊缝的阵列涡流检测试验,主要探讨平面对接焊缝中人工刻槽和孔型缺陷的可检出性。结果验证了阵列涡流用于反应堆水池焊缝缺陷检测的可行性。通过对某电厂在役检测期间的反应堆水池焊缝进行阵列涡流检测,总结了其特点及存在的问题,可为核电厂在役期间水池查漏提供参考建议。

The reactor pool of nuclear power plants generally adopts stainless steel cladding structure, leakage occurred during construction and operation. Based on the characteristics of cladding structures, experimental investigation of the array eddy current inspection of cladding weld was carried out. The detectability of manual groove and hole defects in plane butt weld was mainly investigated. The results verify the feasibility of using array eddy current to detect weld defects in reactor pool. Through the array eddy current inspection of the reactor pool weld during the in-service inspection of a power plant, its characteristics and some problems encountered are summarized, which can provide reference suggestions for the leak detection of the pool during the in-service inspection of nuclear power plant.