Nuclear power station radioactive waste liquid treatment system

Abstract

The invention discloses a nuclear power station radioactive waste liquid treatment system which comprises a chemical discharged water storage unit, a process discharged water storage unit and a ground discharged water storage unit. The chemical discharged water storage unit is connected to a monitoring tank through a first filter and an evaporation unit, the process discharged water storage unit is connected to the monitoring tank through a second filter, a first desalting bed, a second desalting bed and a third filter, the monitoring tank is connected to a nuclear island waste liquid discharge system, and the nuclear power station radioactive waste liquid treatment system further comprises a third desalting bed and a fourth filter which are arranged on a pipeline between the chemical discharged water storage unit and the monitoring tank. Compared with an existing system, the nuclear power station radioactive waste liquid treatment system has the advantages that one desalting bed and one filter are added, and chemical discharged water and process discharged water can be subjected to further precision treatment selectively, so that system operational flexibility is improved while discharged waste liquid is guaranteed to meet requirements of current national standard coastal site treatment limits, and influences on public due to the fact that radioactive substances flow to the environment are reduced.

Description

technical field [0001] The invention relates to the treatment of radioactive waste liquid of nuclear power plants, and more specifically, the invention relates to a radioactive waste liquid treatment system of a pressurized water reactor nuclear power plant. Background technique [0002] The nuclear power plant radioactive waste treatment system (TEU) is used to receive, store, monitor and treat the radioactive waste produced by the nuclear power plant. Currently, two units generally share one system. The system classifies and collects the waste liquid according to the radioactivity concentration and chemical substance content of the waste liquid, and treats them separately. The specific methods are as follows: a) For the process drainage with low chemical impurity content, the desalination process is generally used, and evaporation can also be used. , Filtration process; b) For chemical drainage with high chemical impurity content and high radioactive concentration, evapora...

AI Technical Summary

Problems solved by technology

However, the above-mentioned nuclear power plant radioactive waste liquid treatment system has relatively large residues of radioactive substances in the waste liquid discharged under the design working conditions, which not only affects the environment, but also cannot fully meet the current national standards GB6249-2011 and GB14587-2011. Liquid discharge control limit requirements

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