Cement solidification treatment method for radioactive waste

A radioactive waste and cement solidification technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of material waste and low cost, and achieve the effects of improving technical reserves, reducing processing costs, and increasing containment capacity

Active Publication Date: 2019-11-22
CHINA INST FOR RADIATION PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a situation leads to high cost of procurement and storage, and there is a problem of waste of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the cement curing treatment of radioactive boron-containing concentrate (1)

[0030] The composition and characteristics of the radioactive boron-containing concentrate are as follows: the boron concentration is 40000ppm, the salt content is 250.0g / kg, the sodium-boron ratio is 0.23, and the pH value is 6.7. 137 Cs activity concentration is 9.59E+04Bq / L, 90 The Sr activity concentration is 4.53E+01Bq / L, 60 Co activity concentration is 8.14E+03Bq / L.

[0031] The radioactive boron-containing concentrated solution adopts the following method steps to carry out cement solidification treatment.

[0032] (1) Add the radioactive boron-containing concentrate to the waste bin first, then add lime and additive Glenium C333, stir for 15 minutes, then add cement (ordinary Portland cement) in 2 times, the time interval between each addition is 15 minutes, and continue to stir 15min. The mass ratio of cement, radioactive boron-containing concentrate, lime, and addit...

Embodiment 2

[0034] Embodiment 2: the cement curing treatment of radioactive boron-containing concentrate (two)

[0035] The composition and characteristics of the radioactive boron-containing concentrate are as follows: the boron concentration is 40000ppm, the salt content is 250g / kg, the sodium-boron ratio is 0.23, and the pH value is 6.7. 137 Cs activity concentration is 9.59E+04Bq / L, 90 The Sr activity concentration is 4.53E+01Bq / L, 60 Co activity concentration is 8.14E+03Bq / L.

[0036] The radioactive boron-containing concentrated solution adopts the following method steps to carry out cement solidification treatment.

[0037] (1) Add the radioactive boron-containing concentrated solution into the waste bin first, then add lime and Glenium C333, stir for 10 minutes and then add cement (ordinary Portland cement) in 5 times, the time interval between each addition is 10 minutes, and continue to stir for 10 minutes . The mass ratio of cement, radioactive boron-containing concentrate,...

Embodiment 3

[0039] Embodiment 3: cement solidification treatment of radioactive boron-containing concentrate (three)

[0040] The composition and characteristics of the radioactive boron-containing concentrate are as follows: the boron concentration is 40000ppm, the salt content is 250g / kg, the sodium-boron ratio is 0.23, and the pH value is 6.7. 137 Cs activity concentration is 9.59E+04Bq / L, 90 The Sr activity concentration is 4.53E+01Bq / L, 60 Co activity concentration is 8.14E+03Bq / L.

[0041] The radioactive boron-containing concentrated solution adopts the following method steps to carry out cement solidification treatment.

[0042] (1) Add the radioactive boron-containing concentrated solution into the waste bin first, then add lime and Glenium C333, stir for 13 minutes, then add cement (ordinary Portland cement) in 3 times, the time interval between each addition is 13 minutes, and continue stirring for 13 minutes . The mass ratio of cement, radioactive boron-containing concentr...

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Abstract

The invention belongs to the technical field of radioactive waste treatment, and relates to a cement solidification treatment method for radioactive waste. The radioactive waste is a radioactive boron-containing concentrate. The method sequentially comprises the following steps: (1) firstly adding the radioactive waste into a waste barrel, then adding lime and an additive, stirring the mixture for10-15 minutes, then adding cement, and continuously stirring the mixture for 10-15 minutes; and (2) capping the stirred waste barrel, and then transferring the waste barrel to a curing room for curing. By utilizing the cement solidification treatment method for the radioactive waste, aiming at the problems existing in the practical application of the American Westinghouse solidification technology, the package capacity of the radioactive boron-containing concentrate is improved on the premise that original solidification equipment and technological operation are kept basically unchanged, andit is ensured that various properties of a waste cement solidification product meet the standard requirements.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste treatment, and relates to a cement solidification treatment method for radioactive waste. Background technique [0002] Cement solidification is a traditional radioactive waste stabilization treatment technology, which has technical advantages such as simple process, mature technology, low cost, and good stability of solidified waste. The basic principle of cement solidification is: use cement as the substrate for inorganic gel solidification, uniformly mix cement, radioactive waste and other materials in a certain proportion, and form a solidified body under suitable curing conditions, so as to realize the stabilization of waste. [0003] Since Ling Ao Phase II, a number of newly-built nuclear power units in China have introduced the cement solidification system for radioactive waste from Westinghouse. Compared with the original cement solidification treatment technology in China, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/16G21F9/06
CPCG21F9/165G21F9/06Y02W30/91
Inventor 闫晓俊郭喜良安鸿翔郭霄斌高超柳兆峰刘建琴冯文东
Owner CHINA INST FOR RADIATION PROTECTION
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