Decontamination method for radioactive nuclear waste metal

Abstract

According to the decontamination method for the radioactive nuclear waste metal, radioactive decontamination of the nuclear waste metal can be achieved on the basis of a radioactive decontamination system for the nuclear waste metal. A decontamination system for radioactive nuclear waste metal comprises a shot blasting decontamination device and a metal smelting feeding assembly. The shot blasting decontamination device comprises a spray gun, a sand and dust separator, a sand and dust collector, a steel ball cleaning machine, a steel ball repriatrion, a dry ice supply device, a high-pressure air source and a negative-pressure exhaust device. The nuclear waste metal radioactive decontamination method comprises the following steps: surface shot blasting; fragmentation processing is carried out; compressing and packaging; feeding in a cold furnace; and smelting metal. According to the method, through the two steps of shot blasting decontamination and smelting decontamination, the radiation dose in the nuclear waste metal is greatly reduced, the smelting liquid can be cast into different products according to actual application requirements subsequently, the nuclear waste metal is turned into wealth, recycling of the nuclear waste metal is achieved, and the requirement for minimizing radioactive waste is fully met.

Description

technical field [0001] The invention relates to the technical field of nuclear waste metal treatment, in particular to a decontamination method for radioactive nuclear waste metal. Background technique [0002] With the rapid development of the nuclear industry, nuclear waste metals produced by nuclear power plants and nuclear industrial enterprises are also showing a trend of increasing year by year. These nuclear waste metals are highly radioactive and have a half-life of thousands, tens of thousands or even hundreds of thousands of years. If they are not disposed of properly, they will seriously pollute the environment. [0003] At present, nuclear waste metal whose radiation dose exceeds the safety threshold cannot be treated, and can only be packaged in metal tanks for permanent deep burial disposal, so as to ensure that nuclear waste metal can be geologically sealed for tens of thousands or even hundreds of thousands of years without leakage. [0004] However, the exi...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for decontaminating radioactive nuclear waste metal, which solves the problem that the current disposal scheme for nuclear waste metal cannot meet the requirements of "minimization of radioactive waste"

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