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Radioactive waste liquid treatment system and method

A technology of radioactive waste liquid and treatment system, which is applied in radioactive purification, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of large output of radioactive waste resin, low working exchange capacity of ion exchange resin, and poor resin utilization rate. , to achieve the effect of improving treatment efficiency and service life, minimizing production and reducing impact

Active Publication Date: 2022-07-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3) The working exchange capacity of the ion exchange resin in the process is low, and the utilization rate of the resin is poor, so the output of radioactive waste resin is large
[0008] The current radioactive waste treatment process cannot meet the basic principles of minimizing radioactive waste, so it is still necessary to further develop radioactive waste treatment technology solutions that can reduce the amount of radioactive waste produced

Method used

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  • Radioactive waste liquid treatment system and method
  • Radioactive waste liquid treatment system and method
  • Radioactive waste liquid treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Process water preparation: add sodium nitrate (analytical pure) and cesium nitrate (superior pure) to ultrapure water (purity 18.2MΩ·cm), and add nitric acid to dissolve cesium nitrate to prepare Na + The equivalent concentration is 2.4 meq·L -1 , Cs + The equivalent concentration is 0.075 meq·L -1 process water. The water flow is 10L·h -1 .

[0114] According to the attached image 3 Build a radioactive waste liquid treatment system, in which no cesium adsorption device, ultrafiltration unit and deep purification unit are installed. When calculating the removal factor of the system, the removal factor of nuclide ions by the deep purification unit is conservatively included as 500, and the cesium adsorption device has a negative effect on Cs + The removal factor is conservatively counted as 100. The concentration unit includes one stage reverse osmosis, and the ion exchange unit includes one stage ion exchange bed (IRN160 mixed bed). Using this system to remove ...

Embodiment 2

[0116] According to the attached Figure 4 Build a radioactive waste liquid treatment system, in which no cesium adsorption device, ultrafiltration unit and deep purification unit are installed. When calculating the removal factor of the system, the removal factor of nuclide ions by the deep purification unit is conservatively included as 500, and the cesium adsorption device has a negative effect on Cs + The removal factor is conservatively counted as 100. The concentration unit includes one stage reverse osmosis, and the ion exchange unit includes one stage ion exchange bed (IRN160 mixed bed). The process water is the same as in Example 1. The reverse osmosis concentration factor is 5. When the removal factor of radioactive waste liquid treatment system to radionuclide is lower than 1000, the operation will be stopped. At this time, the output of radioactive waste resin is 1.74L·m -3 .

Embodiment 3

[0118] Process water preparation: add sodium nitrate (analytical grade), cesium nitrate (superior grade), cobalt nitrate hexahydrate (analytical grade) and strontium nitrate (analytical grade) to ultrapure water (purity 18.2MΩ·cm), and Add nitric acid to dissolve cesium nitrate to prepare Na + The equivalent concentration is 2.4 meq·L -1 , Cs + The equivalent concentration is 0.075 meq·L -1 , Co 2+ The equivalent concentration is 0.075 meq·L -1 , Sr 2+ The equivalent concentration is 0.075 meq·L -1 process water. The water flow is 10L·h -1 .

[0119] The radioactive waste liquid treatment system is the same as that of Example 2, and the cesium adsorption device, ultrafiltration unit and deep purification unit are not provided. When calculating the removal factor of the system, the removal factor of nuclide ions by the deep purification unit is conservatively included as 500, and the cesium adsorption device has a negative effect on Cs + The removal factor is conserva...

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Abstract

The invention discloses a radioactive waste liquid treatment system and method. A radioactive waste liquid treatment system, comprising: an ultrafiltration unit, which includes an ultrafiltration membrane, and the ultrafiltration unit is used to remove colloidal nuclides in the radioactive waste liquid; a concentration unit, which includes a reverse osmosis device, and the reverse osmosis The water inlet of the device is connected with the purified liquid outlet of the ultrafiltration unit, and the reverse osmosis device receives the purified liquid of the ultrafiltration unit to perform reverse osmosis concentration on the purified liquid of the ultrafiltration unit; the ion exchange unit, It comprises an ion exchange bed, and the water inlet of the ion exchange unit is connected with the concentrated solution outlet of the reverse osmosis device, and the ion exchange unit receives the concentrated solution of the concentration unit to convert the concentrated solution of the concentration unit. The enriched radionuclides are extracted to the solid phase.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a radioactive waste liquid treatment system and method. Background technique [0002] Nuclear energy has the advantages of being clean, efficient, safe, stable, and economical. It is a clean energy with good development prospects. During the operation of nuclear power plants, radioactive wastes will inevitably be produced, of which radioactive liquid wastes (ie, radioactive liquids) account for a large proportion. For the development of nuclear power and environmental protection, proper disposal of radioactive waste liquid has become an important part of radioactive waste management. [0003] Radioactive liquids from nuclear power plants include 137 Cs, 89 Sr, 90 Sr, 58 Co. 110m Ag, 3 H and other radionuclides, and the radionuclide concentration in the radioactive waste liquid is extremely low, generally in ng·L -1 The level is even lower, and mos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/20G21F9/12C02F1/44
CPCG21F9/20G21F9/12C02F1/441C02F1/444
Inventor 赵璇王韧骋李福志
Owner TSINGHUA UNIV
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