An inflatable radiological underwater inspection tool for nuclear reactors, and in particular, for the radiological inspection of reactor vessel nozzle to safe-end welds. The tool is constructed of a water-tight housing and an inflatable bladder to be used in displacing reactor coolant from the operating vicinity of the radiation path of a panoramic iridium source. With the inspection tool properly centered within the reactor vessel nozzle and with radiographic plates fastened around the outside diameter of the nozzle to safe-end weld, the bladder is pressurized and the iridium source is dispensed to the housing from a remote shielded location. After exposure, the radiographic plates, in the nature of film cassettes, are removed and interpreted for detecting defects in the weld volume.
一种用于核反应堆的充气式
水下辐射检查工具,特别是用于反应堆容器喷嘴与安全端焊缝的辐射检查。该工具由一个
水密外壳和一个充气囊组成,用于将反应堆冷却剂从全景
铱源辐射路径附近移出。当检查工具在反应堆容器喷嘴内正确对中,并在喷嘴外径周围固定了射线照相板以进行安全端焊接后,对气囊进行加压,并从远程屏蔽位置将
铱源分配到外壳中。曝光后,取出具有胶片盒性质的射线照相板,并对其进行解读,以检测焊接处的缺陷。