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High-salt high-alkali low and intermediate level radioactive waste solution cement solidification formula

A cement solidification, high alkali technology, applied in the field of radioactive waste liquid solidification treatment, can solve the problems of less solidified formula, less stay, less engineering application, etc.

Inactive Publication Date: 2015-04-22
SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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Problems solved by technology

[0005] In the current technology, there are the following problems in the cement curing formula of high-salt, high-alkali, medium and low-level radioactive waste liquid (containing α mud): (1) The research on curing formula is mostly carried out on simulated radioactive waste liquid, using simulated nuclide to conduct research, and has carried out real There are fewer formulas for solidifying radioactive waste liquid; (2) Most of them stay in laboratory-scale cold and heat verification work, and few engineering applications are carried out; (3) Applied to thermal tests and engineering scales, it is aimed at There is no report on the cement curing formula for simultaneous curing of waste liquid and α-slurry

Method used

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  • High-salt high-alkali low and intermediate level radioactive waste solution cement solidification formula

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preparation example

[0017] In this embodiment, ordinary Portland cement P.O42.5R is used as the main inorganic gel solidification base material, and additives such as fly ash, attapulgite, ore powder and the like to change the adsorption performance of cement to nuclides can also be added. After these materials are mixed with waste in proportion, the mortar formed will be cured for a period of time to form a cement solidified body. See the table below for specific ratios:

[0018]

[0019] Cold test sequence: prepare 200g / L, 250g / L, 300g / L simulated liquid and simulated mud according to real waste liquid and α mud, add cement and additives (fly ash, mineral powder, attapulgite Stone) uniformly mixed according to the ratio in Table 1 and added to the stirring pot, and mixed and stirred for 10 minutes.

[0020] Thermal test sequence: take the real waste liquid and medium-release α mud and mix them in the ratio shown in Table 1, then add them to the stirring pot, and mix the cement and additives...

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Abstract

The invention discloses high-salt high-alkali low and intermediate level radioactive waste solution cement solidification formula which is used for low and intermediate level waste solution with salt content of 200g / l to 300g / l and 80 percent of sodium nitrate. The low and intermediate level radioactive waste solution with 80 percent of sodium nitrate contains the following components: 0 to 5 percent by volume of slurry, 50 to 100 percent by mass of cement, 0 to 22.5 percent by mass of coal ash, 0 to 22.5 percent by mass of mineral powder and 0 to 5 percent by mass of attapulgite, wherein the ratio of liquid to ash is 0.55 to 0.65. The high-salt high-alkali low and intermediate level radioactive waste solution cement solidification formula is already proved in the commissioning and continuous operation of a cement solidification engineering solidification line, and the performance of solid prepared by utilizing the formula not only can meet the national standard requirement, but also can promote the deployment of the solidification of high-salt high-alkali low and intermediate level radioactive waste solution (containing alpha slurry) and can accelerate the transformation of basic application scientific research to the engineering application.

Description

technical field [0001] The invention belongs to the field of solidification treatment of radioactive waste liquid, and in particular relates to a solidification formula of high-salt, high-alkali, medium and low-level radioactive waste liquid cement. Background technique [0002] At present, different treatment processes such as cement curing, asphalt curing, plastic curing, glass curing, artificial rock curing, improved cement curing, ceramic curing, and granulation curing are mostly used for the curing of medium and low-level radioactive waste liquid at home and abroad. Cement solidification is a common technology for treating low- and medium-level radioactive waste liquids. It has the advantages of stable performance of the solidified body, simple process operation, and low cost. curing treatment. The principle of cement solidification is to use cement as the main inorganic gel solidification substrate, and can also be mixed with fly ash, attapulgite, mineral powder, zeol...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04
Inventor 徐立国张东梅耿磊李鸿展赵玲君焦兴乾马文革杨应光孟维强崔艳敏
Owner SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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