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Substance radiation outgassing test method in complex scene

A technology of complex scenarios and test methods, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of complex gas chromatography analysis operations, limited detection sensitivity, poor connection sealing, etc., achieving strong operability and good versatility. , the effect of less interference factors

Active Publication Date: 2021-01-05
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the detection sensitivity, traditional outgassing research methods can only achieve material radiation outgassing evaluation at high doses
In addition, the traditional method of sealing samples by glass fusing has problems such as large measurement errors, difficult sealing under positive pressure conditions, poor airtightness of the connection between the gas collection device and the gas chromatographic test system, and complicated operation of the gas chromatographic analysis process when studying the radiation outgassing of materials. , subject to many restrictions in complex scenarios with radiation such as temperature, atmosphere, humidity, etc.
In short, the traditional analysis process of radiation outgassing has the disadvantages of low detection sensitivity, poor parallelism, and many interference factors.

Method used

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  • Substance radiation outgassing test method in complex scene
  • Substance radiation outgassing test method in complex scene
  • Substance radiation outgassing test method in complex scene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, silicone rubber foam material is in 15%O 2 Gamma Radiation Outgassing in Atmosphere

[0043] a) Take six parts of 0.2g silicone rubber material and place them in the sample storage-outgas collection device numbered ① to ⑥ (the volume of the device is 100mL), and reduce the pressure value in the sample storage-outgas collection device to 1kPa , filled with 15% O2 and 85% N 2 After repeated cleaning three times, seal it; connect each sample storage-release gas collection device to the molecular pump unit;

[0044] b) Place the sample storage-outgassing collection devices loaded with sample numbers ① to ⑥ in the irradiation device, and irradiate them respectively. The irradiation doses are 2kGy, 5kGy, 10kGy, 25kGy, 50kGy, 100kGy;

[0045] c) After the irradiation is completed, connect the sample storage-release gas collection device with the negative pressure sampling system of the gas chromatograph, turn on the air pump, remove the residual gas in the pipe...

Embodiment 2

[0051] Embodiment 2, the gamma radiation outgassing of silicon rubber foam material under 100% oxygen atmosphere is consistent with the method of embodiment 1, and 15% oxygen is replaced with 100% oxygen in step a), thus obtains silicon rubber foam material at 100 % Radiation outgassing yield under oxygen atmosphere, the radiation chemical yield of hydrogen released from the sample is 6.30x10 -3 μmol / J, the radiochemical yield of methane released by the sample is 3.47x10 -3 μmol / J.

Embodiment 3

[0052] Embodiment 3, the radiation outgassing of imidazole type ionic liquid under inert atmosphere

[0053] Consistent with the method of Example 1, in step a), the silicone rubber foam material is replaced with an imidazole-type ionic liquid (1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt), and in step a), 15% By replacing oxygen with high-purity nitrogen, the radiation outgassing yield of imidazole-type ionic liquids in an inert atmosphere can be obtained, and the radiation chemical yield of hydrogen released by the sample is 1.46x10 -3 μmol / J, the radiochemical yield of methane released by the sample is 4.58x10 -4 μmol / J.

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Abstract

The invention provides a substance radiation outgassing test method under in a complex scene, a solid material, a liquid material, a single or mixed gas and the like are placed in a sample storage-outgassing collection device, the atmosphere in the device is accurately controlled through an atmosphere control device, and irradiation treatment is performed through an irradiation device. After irradiation is completed, the atmosphere in the device is introduced into the testing system through a negative pressure sample injection system, and analysis of material radiation outgassing is achieved through gas chromatography. A quantitative working curve is established by utilizing test results of the standard gas under different sample injection pressures, and is used for analyzing and processing sample data, and finally a gas release result of the material under an irradiation condition is obtained. The method greatly overcomes the defects of a conventional radiation outgassing measurementmethod, has better operability, universality and practicability, can be used for researching the radiation effect of gas involved in various complex environments, and greatly expands the research on the radiation effect of gas in the field of radiation chemistry.

Description

technical field [0001] The invention belongs to the field of radiation effects of materials, and in particular relates to a method for testing material radiation outgassing in complex scenes. Background technique [0002] With the rapid development of science and technology, especially with the development of nuclear technology and space technology, materials, as an important class of functional materials, are used in a variety of extreme radiation environments, such as silicone rubber materials, epoxy resins, three Ethylene propylene rubber, organic extraction systems (n-octanol, n-hexanol, ionic liquids, organic extractants), nanocomposites, etc., have very important applications in nuclear power plants, satellite systems, space systems, spent fuel reprocessing and other fields. The radiation damage or aging of materials determines the service life of devices to a certain extent. Therefore, it is of great significance to evaluate the aging behavior of materials through the...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/16
CPCG01N30/02G01N30/06G01N30/16G01N2030/047G01N2030/067
Inventor 敖银勇余磊毛正昊孟宪福朱芳锐伍晓利汤柳蹇源
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF