A method of using naphthalene-based water reducer cement to solidify radioactive waste resin

A technology of radioactive waste resin and naphthalene-based water reducing agent, applied in the directions of radioactive purification, nuclear engineering, etc., can solve the problem of the decrease of the compressive strength of the solidified body, and achieve the effect of high compressive strength

Inactive Publication Date: 2011-11-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of using naphthalene-based water reducer cement to solidify radioactive waste resin, to solve the problem of adding water to the mixture to improve the fluidity and decrease the compressive strength of the solidified body when cement is solidifying radioactive waste resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix 1888g of sulphoaluminate cement, 112g of composite additives, and 1g of UNF-5 water reducer evenly, and stir with 1L of mixed resin in a stirring pot for 3 minutes to make a slurry, which is placed on the table of the cement mortar fluidity tester. Place the fluidity test mold in the center, divide the stirred slurry into two layers and quickly put it into the test mold, press it with a special tamping rod, remove the mold cover, wipe off the slurry that is higher than the test mold, and put the test mold vertically upwards Gently lift it up, start the power supply of the fluidity tester, and measure the fluidity of the slurry, and the value is 200mm.

Embodiment 2

[0015] Mix 1890g of sulphoaluminate cement, 110g of composite additives, and 2g of UNF-5 water reducer evenly, and stir with 1L of mixed resin in a stirring pot for 3 minutes to make a slurry, which is placed on the table of the cement mortar fluidity tester. Place the fluidity test mold in the center, divide the stirred slurry into two layers and quickly put it into the test mold, press it with a special tamping rod, remove the mold cover, wipe off the slurry that is higher than the test mold, and put the test mold vertically upwards Gently lift it up, start the power supply of the fluidity tester, and measure the fluidity of the slurry, and the value is 225mm.

Embodiment 3

[0017] Mix 1888g of sulphoaluminate cement, 112g of composite additives, and 1g of UNF-5 water reducer evenly, and stir with 1L of mixed resin in a stirring pot for 3 minutes to make a slurry, and fill the slurry once to measure the setting time. After vibrating several times to level the surface, put it into the curing box. The curing temperature is 20±1°C and the relative humidity is ≥90%. Measure the initial setting time after curing until 30 minutes after the start of stirring. After the initial setting time is measured, turn the setting time test mold over to continue curing, and measure the final setting time. The measured initial setting and final setting times were 3h and 11h, respectively.

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PUM

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Abstract

The invention discloses a method for solidifying radioactive waste resins with a naphthalene series water reducer and cement in the technical field of radioactive waste resin solidification with cement. The method comprises the following steps of: uniformly mixing sulphate aluminum cement, compound additives and a UNF-5 water reducer; mixing the mixture with radioactive waste resins in an agitating kettle and agitating for 3 minutes; transferring to a die with the diameter phi of 50mm*50mm; and flatting and maintaining for 7 days in a maintenance box to obtain a solidified product. According to the method disclosed by the invention, water does not need to be added to the mixture in the solidification process of the radioactive waste resins, slurry has proper fluidity and setting time, andthe solidified product has higher compression strength.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste resin cement solidification, and in particular relates to a method for solidifying radioactive waste resin with naphthalene-based water reducer cement. Background technique [0002] A large amount of radioactive waste ion exchange resins are produced during the operation, maintenance and waste liquid treatment of nuclear power plants. These waste resins have a certain water content. After being unloaded from the exchange equipment, they are stored in temporary storage tanks and must be solidified before final disposal to form Stable cured body. Cement curing technology is a common method for curing radioactive waste resin due to its simple process, stable performance and low cost. When curing, the slurry needs a certain degree of fluidity to ensure the smooth mixing process and obtain a uniform cured body. The free water brought in by the waste resin in the temporary storage tank usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/36C04B28/36
Inventor 王建龙孙奇娜李俊峰
Owner TSINGHUA UNIV
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