Curing method of active nucleus waste matter simulation substance

A technology of radionuclide and solidification method, used in radioactive purification, nuclear engineering and other directions, can solve problems such as long half-life, and achieve the effects of high crystallinity, uniform microstructure and strong practicability

Inactive Publication Date: 2009-01-14
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safe disposal of high-level radioactive waste, which is highly toxic and has a long half-life, has always been a problem that has not been well resolved.

Method used

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  • Curing method of active nucleus waste matter simulation substance
  • Curing method of active nucleus waste matter simulation substance
  • Curing method of active nucleus waste matter simulation substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for immobilizing radioactive nuclear waste simulants, comprising the following steps:

[0032] a. Weigh ZrO according to the molar ratio of 1:1:0.01 2 : 30.8057g, SiO 2 : 15.0211g, Eu 2 o 3 : 2.1996, added to a 500ml nylon ball mill tank containing 70ml alcohol, and added ZrO with a corresponding mass diameter of 4mm according to the mass ratio of 1:2.5. 2 small ball;

[0033] b. On the QM-1SP ball mill produced by Nanjing University, the raw material was wet ball milled at a speed of 240r / min for 24 hours; the ball milled material was dried in an oven at 100°C, and the particle size distribution curve of the obtained mixed raw material was as follows figure 1 shown;

[0034] c. Add the mixed raw materials into two corundum crucibles with a volume of 80ml, and the amount of sample added shall not exceed 2 / 3 of the volume of the crucible, and then put the crucible with the sample into the SX-12-16 box-type resistance furnace for High temperature synthesis,...

Embodiment 2

[0037] A method for immobilizing radioactive nuclear waste simulants, comprising the following steps:

[0038] a. Weigh ZrO according to the molar ratio of 1:1:0.02 2 : 30.8057g, SiO 2 : 15.0211g, CeO 2 : 2.1514, join in the 500ml nylon ball mill jar that 70ml alcohol is housed, add the ZrO that the corresponding mass diameter is 4mm according to the material-ball ratio that is 1: 2.5 by mass ratio 2 small ball;

[0039] b. On the QM-1SP ball mill produced by Nanjing University, the raw material was wet ball milled at a speed of 240r / min for 24 hours; the ball milled material was dried in an oven at 100°C, and the particle size distribution curve of the obtained mixed raw material was as follows Figure 6 shown;

[0040] c. Add the mixed raw materials into two corundum crucibles with a volume of 80ml, and the amount of sample added shall not exceed 2 / 3 of the volume of the crucible, and then put the crucible with the sample into the SX-12-16 box-type resistance furnace for...

Embodiment 3

[0043] A method for immobilizing radioactive nuclear waste simulants, comprising the following steps:

[0044] a. Ingredients: according to SiO 2 : ZrO 2 :Eu 2 o 3 The molar ratio of SiO is 1:1:0.2 2 , ZrO 2 and Eu 2 o 3 Powder (the maximum particle size of each raw material component before ball milling is controlled below 1mm, if the maximum particle size of the raw material before ball milling is above 1mm, pretreatment such as jaw crushing should be performed in advance to make the maximum particle size of the raw material below 1mm), placed in a ball mill;

[0045] B, grinding: take dispersing agent deionized water according to the ratio of solid-liquid mass ratio 1: 2, inject in the ball mill, add grinding ball [according to the material ball mass ratio of 1: 2.5, add corresponding quality, the diameter is the zirconia of 4mm ( ZrO 2 ) ball], ball milling for 25 hours until the average particle size of the mixed powder is less than 20 μm (the particle size of th...

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Abstract

The invention provides a curing method used for radioactive nuclear waste simulation matter, which is characterized in that the method comprises the steps as follows: SiO2, ZrO2, and Eu2O3 or CeO2 are taken as raw material and compounded, grinded, dried and calcinated for 20-25h under the temperature of 1400-1600 DEG C so as to prepare a solidified body which takes the zircon as the substrate. The preparation method of the invention has the advantages of simple method, easy operation, short production period, high production efficiency, and uniform solidified body microstructure with higher crystallinity; the method of the invention is a new effective curing method provided for processing the radioactive nuclear waste and can be widely used for the processing of the radioactive nuclear waste exhausted by corresponding fields such as nuclear industry, etc.

Description

technical field [0001] The invention belongs to a method for treating radioactively polluted materials, and relates to a method for solidifying a radioactive nuclear waste simulant substance based on zircon, which is suitable for (large-scale) treatment of radioactive nuclear waste discharged from nuclear power plants and other related fields. Background technique [0002] The successful explosion of the atomic bomb enabled our country to have a strategic nuclear deterrence, and also made our country enter the ranks of nuclear powers. At the same time, in order to achieve the rapid development of my country's economy and society, the peaceful use of nuclear energy is an important and priority direction for my country's energy development at this stage and in the next few decades. However, a large amount of radioactive waste is bound to be produced during the operation of the nuclear industry. How to dispose of these radioactive waste safely and effectively not only affects a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/00
Inventor 崔春龙卢喜瑞唐敬友张东
Owner SOUTHWEAT UNIV OF SCI & TECH
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