Underwater dust collection device for nuclear reactor pressure vessel

The utility model provides an underwater dust collection device for a nuclear reactor pressure vessel, the underwater dust collection device for the nuclear reactor pressure vessel comprises a dust collection main body and a collection chamber, the dust collection main body comprises a suction pump assembly, a water inlet pipe, a protection elbow pipe and a suction nozzle which are connected in sequence, a filter assembly is arranged at the butt joint position of the water inlet pipe and the protective bent pipe, the protective bent pipe is used for containing foreign matter sucked by the suction nozzle, and the suction pump assembly is used for driving the suction nozzle to suck the foreign matter and back-flushing the foreign matter into the collecting cavity from the protective bent pipe. According to the utility model, the underwater transfer operation of high-radioactivity foreign matters can be realized through the backwashing function. 本实用新型提供了一种用于核反应堆压力容器的水下吸尘装置，所述的用于核反应堆压力容器的水下吸尘装置包括吸尘主体与收集腔室，所述的吸尘主体