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Boron-containing radioactive waste liquid treatment device and method

A radioactive waste liquid and radionuclide technology, which is applied in the field of boron-containing radioactive waste liquid treatment devices, can solve the problems of boric acid waste, low solubility, and increase the burden of storing radioactive solid waste, and achieve the effect of recycling

Active Publication Date: 2019-10-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low solubility of boric acid in water, a large amount of radioactive concentrate will be produced when treating boron-containing radioactive waste liquid, thereby generating a large amount of secondary radioactive solid waste, increasing the burden on nuclear power plants to store radioactive solid waste, and also causing boric acid. waste

Method used

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  • Boron-containing radioactive waste liquid treatment device and method
  • Boron-containing radioactive waste liquid treatment device and method
  • Boron-containing radioactive waste liquid treatment device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0065] The boron-containing radioactive waste liquid treatment device used in this embodiment and image 3 The device shown is different in that no activated carbon filter 101 and security filter 202 are provided, and other components are the same as image 3 The apparatus shown is the same. The reverse osmosis equipment 200 is three reverse osmosis membrane modules connected in series, and each reverse osmosis membrane module is equipped with a Dow LE reverse osmosis membrane element, and the Dow LE reverse osmosis membrane has a pair of Co 2+ , silica and boric acid rejection rates were 98%, 99.5% and 40%. The equipment, components and materials used in the device are shown in the table below:

[0066]

[0067] The boron-containing radioactive waste liquid treated in this embodiment is simulated radioactive waste water, which contains Co 2+ 2000μg / L, boric acid 2000mg / L, silicon dioxide 2mg / L.

[0068] The design treatment capacity of boron-containing radioactive wast...

Embodiment 2

[0075] The boron-containing radioactive waste liquid treatment device used in this example is basically the same as that used in Example 1. The difference is that a Dow BW30 reverse osmosis membrane element is installed in the reverse osmosis membrane module, and the Dow BW30 reverse osmosis membrane element is opposite to Co 2+ , silica and boric acid rejection rates were 93%, 99% and 60%. The equipment, components and materials used in the device are shown in the table below:

[0076]

[0077]

[0078] The boron-containing radioactive waste liquid treated in this embodiment is simulated radioactive waste water, which contains Co 2+ 2000μg / L, boric acid 2000mg / L, silicon dioxide 2mg / L.

[0079] The design treatment capacity of boron-containing radioactive waste liquid treatment device is 1m 3 / h.

[0080] The operating pressure of the high-pressure pump 203 is 3MPa, and the simulated radioactive waste water is sent into the reverse osmosis equipment 200 through the h...

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Abstract

The invention discloses a boron-containing radioactive waste liquid treatment device and method. The boron-containing radioactive waste liquid treatment device includes reverse osmosis equipment and continuous electric desalting equipment; a purified liquid outlet of the reverse osmosis equipment is connected with an inlet of the continuous electric desalting equipment; and the reverse osmosis equipment can retain silicon after penetrating through boron, and the reverse osmosis equipment and the continuous electric desalting equipment can remove radionuclides. According to the boron-containingradioactive waste liquid treatment device and method, the purification capacity for the radionuclides and the silicon is high, and the recovery rate for boric acid is high, the recovered boric acid can be reused in a primary circuit or a spent fuel storage pool in a nuclear power plant, and the recycling of the boric acid is realized; and the concentration multiple is high so that the productionof radioactive concentrated liquid can be significantly reduced, and thus the production of solid radioactive wastes is significantly reduced.

Description

technical field [0001] The invention relates to the technical field of boron-containing radioactive waste liquid treatment, in particular to a boron-containing radioactive waste liquid treatment device and method. Background technique [0002] A large amount of boron-containing radioactive waste liquid will be produced in the primary circuit of the nuclear power plant and the spent fuel storage pool. Boric acid has acute toxicity, chronic toxicity and reproductive toxicity, and its entry into water will affect the ecological environment and human health. Therefore, boron-containing radioactive waste liquid needs to remove not only radioactivity, but also boric acid. [0003] At present, in the process of treating boron-containing radioactive waste liquid, boric acid and other non-radioactive substances are usually treated together with radioactive nuclides to produce boron-containing radioactive concentrate. Due to the low solubility of boric acid in water, a large amount o...

Claims

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Application Information

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IPC IPC(8): G21F9/10G21F9/12
CPCG21F9/10G21F9/12
Inventor 李福志赵璇张猛
Owner TSINGHUA UNIV
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