On-line decontamination device and method for nuclear power facility primary loop radioactive contamination

Abstract

The invention relates to an on-line decontamination device and method for nuclear power facility primary loop radioactive contamination, and belongs to the field of minimized decontamination of radioactive waste in a nuclear industry. The device consists of a decontaminant system, a cyclic decontamination system, circulation pipelines and the like; and the method comprises the following steps: (I)the cyclic decontamination device is established according to conditions on a site, a decontamination liquid preparing tank and a detergent tank are reasonably arranged and connected with related circulation pipeline facilities on the site, a pipeline of the decontamination device is connected with a pipeline of a nuclear power facility primary loop, and installation and debugging are performed;(II) components and a solvent of a detergent are added to the detergent tank, after stirring is performed fully, cyclic decontamination is performed on the pipeline of the nuclear power facility primary loop; and (III) after the cyclic decontamination is completed, the solvent in the cyclic decontamination system is neutralized, and the cyclic decontamination system is cleaned with clean water. The method provided by the invention has the characteristics of having high decontamination efficiency, saving decontamination costs and the like, toxic and harmful gases are not produced in the decontamination process, and decontaminated wastewater is easy to recycle and treat.

Description

technical field [0001] The invention relates to the technical field of decontamination for minimizing radioactive waste in the nuclear industry, in particular to an online decontamination device and method for radioactive pollution in a primary circuit of a nuclear power facility. Background technique [0002] With the rapid development of my country's nuclear power industry, more and more nuclear power units are being built. During the operation of nuclear power reactors, radionuclides will inevitably be produced and accumulated in the reactor core, and the radionuclides will be passed through by the main coolant. The primary loop system is brought to related systems, causing radioactive contamination of systems and equipment. Before the dismantling of the reactor, in order to reduce the intensity of the radiation field in the workplace, reduce the exposure dose of the operator, reduce the level of waste, and reduce the amount of waste generated during the decommissioning pr...

AI Technical Summary

Problems solved by technology

[0004] At present, the common decontamination methods include mechanical decontamination (including high-speed jet, ultrasonic method, etc.), chemical decontamination, electrochemical decontamination, laser decontamination, and melting decontamination. These methods have their own advantages and disadvantages in the process of field application.

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