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Method for treating radioactive solid organic waste

An organic waste and radioactive technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of unsolved radioactive solid organic waste transportation, small amount of radioactive waste treatment, separation of radionuclide, etc., to achieve overall concise and effective, waste The effect of increasing volume reduction ratio and fast response speed

Inactive Publication Date: 2018-06-26
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Although the above-mentioned foreign technologies use supercritical water oxidation to treat radioactive waste, they mainly deal with radioactive liquid waste. For radioactive solid waste, they still need to be processed in batches in batches, which has not actually solved the problem of transporting radioactive solid organic waste; and radioactive waste The processing capacity is small, generally less than 4kg / h, and the radionuclides are not separated in the processing reactor
In my country, there is no other research, report and application of supercritical water oxidation treatment of radioactive waste other than this application

Method used

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  • Method for treating radioactive solid organic waste
  • Method for treating radioactive solid organic waste
  • Method for treating radioactive solid organic waste

Examples

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Effect test

Embodiment 1

[0042] Embodiment 1: the processing of radioactive solid organic waste (one)

[0043] (1) Use a colloid mill to pulverize 10 kg of radioactive waste resin for 10 minutes until the cumulative pulverization of the radioactive waste resin is 10-15 times, and the particle size of the radioactive waste resin reaches 5-10 μm. Determination of initial TOC of crushed radioactive waste resin R = 119850 ppm.

[0044] (2) Adding Cu with a concentration of 0.1mol / L to the radioactive waste resin 2+ Catalyst (Cu(NO 3 ) 2 ) with stirring and heating. After the temperature reaches 90°C, slowly add hydrogen peroxide with a peristaltic pump. When the amount of hydrogen peroxide reaches 4.8L (corresponding mass is 5.3kg), stir for another 15-30 minutes. The dissolved radioactive waste resin solution was cooled and filtered, and 100 mL of propanol, a combustion aid, was added as a feed solution for supercritical water reaction.

[0045] (3) Feed liquid and liquid oxygen are pumped into such...

Embodiment 2

[0048] Embodiment 2: the processing of radioactive solid organic waste (two)

[0049] The processing method of radioactive solid organic waste is basically the same as embodiment 1, just cancels Cu in step (1). 2+ Addition of catalyst. Measured initial TOC R =99850ppm, the pH of the effluent liquid sampling is 3, and the TOC of the effluent liquid sampling is 3050ppm. According to the above formula (1), it can be obtained that η=96.95%.

Embodiment 3

[0050] Embodiment 3: the processing of radioactive solid organic waste (three)

[0051] The treatment method of radioactive solid organic waste is basically the same as that of Example 1, except that in step (3), the reaction temperature is changed to 800° C., and the reaction pressure is 10 MPa. Measured initial TOC R =109700ppm, the pH of the effluent liquid sampling is 3, and the TOC of the effluent liquid sampling is 34ppm. According to the above formula (1), it can be obtained that η=99.97%.

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Abstract

The invention belongs to the technical field of nuclear waste treatment, and relates to a method for treating radioactive solid organic waste. The method includes the following sequential steps of: (1) adding an oxidizing agent to perform a digestion reaction on the radioactive solid organic waste; (2) mixing the digested radioactive solid organic waste with combustion improver and an oxidizing agent, then delivering the mixture into a reactor, and performing an oxidation reaction in a supercritical aqueous phase, wherein a desalination device is arranged in the reactor; and (3) discharging radioactive concentrated salt residues which are obtained after desalination is conducted in the desalination device from a residue discharging mouth in the reactor, and performing gas-liquid separationon the matter discharged from an outlet in the reactor through a gas-liquid separation device. Through the method, oxidation treatment can be carried out on the radioactive solid organic waste by using the supercritical water, the processing capacity and conversion rate can be improved, and radioactive nuclide can be separated effectively in the reactor.

Description

technical field [0001] The invention belongs to the technical field of nuclear waste treatment, and relates to a method for treating radioactive solid organic waste. Background technique [0002] At present, my country is in the stage of rapid development of nuclear power. The "National Nuclear Power Development Special Plan (2005-2020)" clearly states that "by 2020, the operating installed capacity of nuclear power will strive to reach 40 million kilowatts, and 18 million kilowatts of projects under construction will be carried forward to follow-up construction after 2020. Nuclear power accounts for all electricity. The proportion of installed capacity will increase from less than 2% to 4%, and the annual generating capacity of nuclear power will reach 260-280 billion kWh. For such a large nuclear power installed capacity, a large amount of radioactive solid organic waste is produced every year, including radioactive waste resin, radioactive waste plastic, radioactive wast...

Claims

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Application Information

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IPC IPC(8): G21F9/30
CPCG21F9/30G21F9/308
Inventor 张振涛李腾华小辉郑文俊李玉松郑宇游新锋
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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