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Method for solidifying radioactive spent scintillation liquid

A technology of radioactive waste and scintillation fluid, applied in the field of waste treatment

Pending Publication Date: 2020-10-20
SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of transportation risk and temporary storage risk of radioactive liquid waste in the prior art, the present invention provides a method for curing radioactive waste scintillation liquid with low cost and fast curing speed

Method used

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  • Method for solidifying radioactive spent scintillation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for curing radioactive waste scintillation fluid, specifically comprising the following steps:

[0023] Step 1: Take 20.0ml of radioactive waste scintillation fluid produced by a factory sample analysis, add 4.0g of starch, 2.0g of cellulose, 2.0g of stearic acid and 2.0g of activated carbon to the radioactive waste scintillation fluid, stir well to obtain mixture I.

[0024] Step 2: Heat the mixture I obtained in step 1 in a water bath at 70.0°C until the stearic acid in the mixture I is dissolved to obtain the mixture II.

[0025] Step 3: Add 2.0 mL of NaOH solution with a molar concentration of 5 mol / L to the mixture II obtained in Step 2 at 70.0° C., and stir for 2-3 minutes to react. After cooling, a solidified body of radioactive waste scintillation fluid is obtained.

[0026] The radioactive scintillation fluid was solidified by the method of this example, and the cured body was loose, non-adhesive, free of free liquid, and non-stick to the wall.

[002...

Embodiment 2

[0029] A method for curing radioactive waste scintillation fluid, specifically comprising the following steps:

[0030] Step 1: Take 20.0ml of radioactive waste scintillation fluid produced by a factory sample analysis, add 8.0g of starch, 6.0g of cellulose, 4.0g of stearic acid and 2.0g of activated carbon to the radioactive waste scintillation fluid, stir well to obtain mixture I.

[0031] Step 2: Heat the mixture I obtained in the step 1 in a water bath at 80.0°C until the stearic acid in the mixture I is dissolved to obtain the mixture II.

[0032] Step 3: Add 4.0 mL of NaOH solution with a molar concentration of 8 mol / L to the mixture II obtained in Step 2 at 80.0° C., and stir for 2-3 minutes to react. After cooling, a solidified body of radioactive waste scintillation fluid is obtained.

[0033] The radioactive scintillation fluid was solidified by the method of this example, and the cured body was loose, non-adhesive, free of free liquid, and non-stick to the wall.

...

Embodiment 3

[0036] A method for curing radioactive waste scintillation fluid, specifically comprising the following steps:

[0037] Step 1: Take 20.0ml of radioactive waste scintillation fluid produced by a factory sample analysis, add 8.0g of starch, 6.0g of cellulose, 4.0g of stearic acid and 4.0g of activated carbon to the radioactive waste scintillation fluid, stir well to obtain mixture I.

[0038] Step 2: Heat the mixture I obtained in the step 1 in a water bath at 80.0°C until the stearic acid in the mixture I is dissolved to obtain the mixture II.

[0039] Step 3: Add 4.0 mL of NaOH solution with a molar concentration of 8 mol / L to the mixture II obtained in Step 2 at 80.0° C., and stir for 2-3 minutes to react. After cooling, a solidified body of radioactive waste scintillation fluid is obtained.

[0040] The radioactive scintillation fluid was solidified by the method of this example, and the cured body was loose, non-adhesive, free of free liquid, and non-stick to the wall.

...

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Abstract

The invention discloses a method for solidifying a radioactive waste scintillation liquid. According to the invention, a solidifying agent comprising starch, cellulose, stearic acid and activated carbon is used for solidifying a radioactive waste scintillation liquid, so that the method has the advantages of simple operation, rapid solidifying reaction, short solidifying time and low cost; the solidified body of the radioactive waste scintillation liquid solidified by the method has the characteristics of looseness, no adhesion, low oil seepage rate, no free liquid and the like, so that the risk that the radioactive waste scintillation liquid escapes in a long-time transportation process is avoided; and active carbon, starch and cellulose are used for adsorbing a radioactive waste scintillation liquid to achieve preliminary solidification of the radioactive waste scintillation liquid, and the activated carbon, the starch and the fibers adsorbing the radioactive waste scintillation liquid are coated with colloid composed of stearate obtained through the reaction of stearic acid and a strong alkali solution, stearic acid and a strong alkali solution, so that the radioactive waste scintillation liquid is locked in the activated carbon, the starch and the cellulose so as to achieve the final solidification and avoid dissipation of the radioactive waste scintillation liquid.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to a method for solidifying radioactive waste scintillation fluid. Background technique [0002] Radioactive waste scintillation fluid is the radioactive organic waste liquid produced during the radionuclide analysis process of the scintillation spectrometer. It contains tritium, strontium, plutonium and other radionuclides and is mobile, and the potential danger of long-term temporary storage is very high. The main methods for the treatment of radioactive waste scintillation fluid include incineration, distillation, solidification, and refining. Among them, the distillation, solidification, and refining processes are complicated and cannot achieve the purpose of final disposal. The follow-up treatment requires a large investment. It is feasible and the most ideal volume reduction method to deal with it. Due to the limited transportation of radioactive liquids, most of the ...

Claims

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Application Information

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IPC IPC(8): G21F9/16G21F9/14
CPCG21F9/167G21F9/14
Inventor 文清云冯双喜许文苑耿磊仇宏宇李鸿展张红梅况友成李卓杜蕾
Owner SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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