Oxidized gel for shallow layer sampling of radioactive contaminated metals and preparation method of gel

An oxidized gel and gel technology, which is applied in the field of radiation detection, can solve the problems of splashing of radioactive metal chips, inability to effectively collect shallow activated metal samples, and the rise of radioactive aerosols, etc. The effect of changing performance

Active Publication Date: 2019-05-24
CHINA INST FOR RADIATION PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sampling and detection is an important part of the decommissioning of nuclear facilities. The metal sampling methods in existing nuclear facilities are mainly swab sampling, thermal cutting sampling, and drilling sampling, but they are limited by the type of nuclear facility, pollution characteristics, operating space restrictions, and management requirements. Influenced by many factors, these existing sampling methods are often unable to meet the needs of actual use, manifested in: wiping sampling cannot effectively collect shallow samples of activated metals, while thermal cutting and drilling will cause rapid rise of radioactive aerosols, radioactive metal shavings Splash and other issues

Method used

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  • Oxidized gel for shallow layer sampling of radioactive contaminated metals and preparation method of gel
  • Oxidized gel for shallow layer sampling of radioactive contaminated metals and preparation method of gel

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Effect test

Embodiment 1

[0038] Embodiment 1: the preparation of oxidation gel and the mensuration of stainless steel sampling depth, sampling accuracy (1)

[0039] The formula composition of the oxidized gel prepared in this embodiment by weight percentage is as follows:

[0040] Gel base calcium oxide 15%, surfactant CH 3 (CH 2 ) 5 (OCH 2 CH 2 ) 2 OH is 5%, thixotropic multiplier Y1010 is 5%, strong oxidant cerium ammonium nitrate 20%, nitric acid 20%, and the balance is water (because cerium ammonium nitrate itself has bright color, slight foaming and moderate viscosity, so no need Add color indicator, defoamer and thickener).

[0041] The specific preparation method of the oxidized gel is as follows:

[0042] (1) Add the gel base material of the formula amount into the water of the formula amount, fully stir and emulsify until uniform;

[0043] (2) Add the ingredients of other formula quantities except the gel base material, water, surfactant, and thixotropic multiplier and mix evenly, and...

Embodiment 2

[0049] Embodiment 2: the preparation of oxidation gel and the mensuration of stainless steel sampling depth, sampling accuracy (two)

[0050] The formula composition of the oxidized gel prepared in this embodiment by weight percentage is as follows:

[0051] Gel substrate silica 5%, surfactant AT904 10%, thixotropic multiplier T2-815 0.5%, strong oxidant hexammine cobalt trichloride 3%, hydrochloric acid 3%, defoamer n-octyl 3% alcohol, 0.5% sodium dibenzylsulfonate as a color indicator, 0.1% diethylene glycol monohexyl ether as a thickener, and the balance is water.

[0052] The concrete preparation method of oxidation gel is as follows:

[0053] (1) Add the gel base material of the formula amount into the water of the formula amount, fully stir and emulsify until uniform;

[0054] (2) Add the ingredients of other formula quantities except the gel base material, water, surfactant, and thixotropic multiplier and mix evenly, and seal up for use;

[0055] (3) Before use, add ...

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Abstract

The invention belongs to the technical field of radiation detection, and relates to an oxidized gel for shallow layer sampling of radioactive contaminated metals and a preparation method of the gel. The oxidized gel comprises the following components in percentage by weight: 5-15% of a gel base material serving as a gel framework material, 5-10% of a surfactant, 0.5-5% of a thixotropic multiplier,3-20% of a strong oxidant, 3-20% of acid and the rest of water. The oxidized gel used for shallow layer sampling of radioactive contaminated metals can be used for shallow layer sampling of radioactive contaminated metals more accurately, smoothly, controllably and intuitively, and radiation damage to operators in the sampling process is reduced.

Description

technical field [0001] The invention belongs to the technical field of radiation detection, and relates to an oxidation gel used for shallow sampling of radioactively polluted metals and a preparation method thereof. Background technique [0002] After decades of development in my country's nuclear industry, a large number of nuclear facilities have entered or are about to enter the decommissioning stage. Sampling and detection is an important part of the decommissioning of nuclear facilities. The metal sampling methods in existing nuclear facilities are mainly swab sampling, thermal cutting sampling, and drilling sampling, but they are limited by the type of nuclear facility, pollution characteristics, operating space restrictions, and management requirements. Influenced by many factors, these existing sampling methods are often unable to meet the needs of actual use, manifested in: wiping sampling cannot effectively collect shallow samples of activated metals, while therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00G01N1/02
CPCY02A20/20
Inventor 梁栋王永仙郭丽潇梁宇邓少刚张文俊李宁武明亮刘东
Owner CHINA INST FOR RADIATION PROTECTION
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