Movable radioactive decontamination device

Abstract

The invention belongs to the technical field of radioactive decontamination treatment and particularly relates to a movable radioactive decontamination device. The movable radioactive decontamination device comprises a cleaning tank with a hanging basket, a tank cover, a manual spraying device, a spraying valve, a stainless steel heater, an ultrasonic generator, rubber wheels with brakes, a blow-off pipe and a rack. The cleaning tank with the hanging basket is installed in the rack, the tank cover is arranged on the top of the rack, and the rubber wheels with the brakes are installed in the four corners of the bottom of the rack respectively. A circulating filtration system is arranged at the bottom of the cleaning tank with the hanging basket. The manual spraying device is connected with one end of the spraying valve, and the other end of the spraying valve is connected with the circulating filtration system. The stainless steel heater is installed on the right side of the cleaning tank with the hanging basket. The blow-off pipe is installed on the left side of the cleaning tank with the hanging basket. The ultrasonic generator is installed on a tank body of the cleaning tank with the hanging basket. The problems existing in existing decontamination equipment can be solved, the decontamination efficiency is high, and the movable radioactive decontamination device is suitable for radioactive movable radioactive decontamination device of small parts of a nuclear power plant.

Description

technical field [0001] The invention belongs to the technical field of radioactive decontamination treatment, and in particular relates to a movable radioactive decontamination device. Background technique [0002] In the maintenance work of nuclear power plants, there are a large number of small equipment parts and tools that have strong radioactive surface contamination and dose due to contact with radioactive media. In order to protect maintenance personnel and reduce personnel surface contamination and exposure during work Radiation dose requires decontamination of contaminated equipment parts and tools. [0003] At present, the technology for radioactive decontamination equipment for components is relatively simple. Taking Tianwan Nuclear Power Station as an example, it is designed as a fixed decontamination system for decontamination of small equipment and tools, such as figure 1 with figure 2 As shown, the system includes two decontamination tanks 1 with hanging ba...

AI Technical Summary

Problems solved by technology

This system uses the traditional oxidation-reduction chemical decontamination method, which has certain requirements for decontamination materials (only suitable for austenitic stainless steel, and is corrosive to other materials). In addition, there are problems such as long decontamination time and large amount of waste liquid.

Secondly, the decontamination system is a fixed system, and the location of the plant is limited. However, there are many decontamination parts during each unit shutdown and overhaul, resulting in crowded decontamination sites and low decontamination efficiency.

There are also a large number of movable decontamination devices on the market, generally using ultrasonic decontamination process, but the system is not equipped with heating and circulation systems, for the decontamination of radioactive components, it is only suitable for the decontamination of loose contamination, and the removal effect of fixed contamination very limited

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