Adsorption material and method for removing nuclide silver in reactor coolant by using it

An adsorption material and reactor technology, applied in chemical instruments and methods, nuclear engineering, other chemical processes, etc., can solve the problems of a large amount of high-level waste liquid accumulation, increased radiation field strength, and a large number of other problems, and achieve large adsorption capacity and dispersion. The effect of good sex and simple operation

Active Publication Date: 2020-03-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the weakly charged radionuclide silver in the reactor coolant is difficult to ion exchange with the ion exchange resin, and it still exists in the coolant, and its concentration continues to increase with the deepening of the burnup and the operation of the reactor, which eventually leads to The increase in radiation field strength and the accumulation of high-level radioactive waste require more complex treatment processes to remove radionuclide silver before discharge. These often produce a large amount of secondary nuclear waste such as waste resin and waste water.

Method used

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  • Adsorption material and method for removing nuclide silver in reactor coolant by using it

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Effect test

Embodiment 1

[0030] Embodiment 1: Preparation of adsorbent material and its adsorption to nuclide silver in simulated coolant (1)

[0031] Weigh 50 mg of graphene oxide, dissolve it ultrasonically with 100 mL of ethylene glycol, add 0.25 g of ferric chloride and 0.5 g of polyethyleneimine (average molecular weight: 8000 Mw), and continue ultrasonication for 20 minutes. Afterwards, the mixed solution was transferred into a 200ml reaction kettle, sealed and placed in an oven at 180°C for 5 hours before the reaction was completed, and the product was washed and dried.

[0032] Take by weighing 25mg above-mentioned reaction product and add 50mL containing the boron of 1mg / L silver, lithium water, wherein boron concentration is 650mg / L (H 3 BO 3 ), the lithium concentration is 3.5mg / L (LiOH). Ultrasound for 20 minutes to make the adsorption material fully contact with the nuclide silver, let the mixed solution stand at room temperature for 30 minutes, and then use a magnet to separate the ads...

Embodiment 2

[0033] Embodiment 2: Preparation of adsorption material and its adsorption to nuclide silver in simulated coolant (two)

[0034] Weigh 200 mg of graphene oxide, dissolve it ultrasonically with 500 mL of ethylene glycol, add 0.5 g of ferric chloride and 1.5 g of polyethyleneimine (average molecular weight: 8000 Mw), and continue ultrasonication for 20 minutes. Afterwards, the mixed solution was transferred into a 1L reaction kettle, sealed and placed in an oven at 180°C, kept for 10 hours, and the reaction was completed, and the product was washed and dried.

[0035] Take by weighing 25mg above-mentioned reaction product and add 50mL containing the boron of 0.5mg / L silver, lithium water, wherein boron concentration is 1200mg / L (H 3 BO 3), the lithium concentration is 2.2mg / L (LiOH). Ultrasound for 10 minutes to fully contact the adsorption material with the nuclide silver, stir the mixture at room temperature (200 rpm) for 30 minutes, and then use a magnet to separate the ads...

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Abstract

The invention belongs to the technical field of treatment of nuclear waste and relates to an adsorbing material and a method for removing nuclide silver from a reactor coolant by virtue of the adsorbing material. The adsorbing material is prepared from graphene oxide, ferric trichloride, polyethyleneimine and glycol at 160-180 DEG C by virtue of an in-situ reduction assembling method. The method sequentially comprises the following steps: (1) dispersing the adsorbing material into the reactor coolant so as to adsorb nuclide silver; and (2) after the adsorption time is reached, attracting the adsorbing material adsorbed with the nuclide silver away by virtue of a magnet, namely that separating the adsorbing material adsorbed with the nuclide silver from the reactor coolant. By utilizing the adsorbing material and the method, the adsorbing material can be simply and conveniently prepared with low cost and has good dispersity and high adsorption capacity in water and can be used for rapidly and efficiently separating the nuclide silver from the reactor coolant.

Description

technical field [0001] The invention belongs to the technical field of nuclear waste treatment, and relates to an adsorption material and a method for removing nuclide silver in reactor coolant by using the same. Background technique [0002] The development of nuclear power is an important means to ensure national energy security and promote energy conservation and emission reduction. With the large-scale development of nuclear energy, the safe handling and disposal of radionuclides has become the focus of worldwide attention. At present, for the removal of radionuclides in reactor coolant, domestic and foreign mainly rely on the ion exchange resin of the resin bed of the purification system. The reactor coolant flows through the ion exchange resin after being cooled and depressurized, and most of the ionic metals can be removed. In this way, not only the water quality is purified, but also the purpose of removing radionuclides is achieved. However, the weakly charged ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30G21F9/12
CPCB01J20/0229B01J20/20B01J20/261B01J2220/46G21F9/12
Inventor 曹林园王辉杨文田珏胡勇高阳彭德全辛长胜
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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