Source dropping method for standard gamma source of radioactive aerosol filter membrane
A radioactive and aerosol technology, applied in dosimeters and other directions, can solve the problems of wrong addition of sample points, deviation of sample addition, excessive labor consumption, etc., and achieve the effect of uniform distribution
Inactive Publication Date: 2018-07-27
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology
Using this traditional artificial drip source method to spot samples on the filter membrane shows many disadvantages, such as the need to consume too much labor and too much time for sample addition, the difference in sample addition methods leads to deviations in the amount of sample added, and the possibility of spotting when adding samples. add wrong etc.
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[0031] The specific implementation manners of the present invention are further described below by way of examples.
[0032] Utilize sample spotting robot (SF6 pipetting robot produced by Shanghai Yongchuang Medical Instrument Co., Ltd.), carry out the drip source operation of the radioactive aerosol filter membrane standard gamma source of each embodiment as follows by dot matrix sample addition mode, each embodiment The specific operating conditions and the measurement results of the distribution uniformity of radionuclides on the obtained filter membrane are shown in Table 1 below. The type of radionuclide in the radioactive solution is 60 Co, the radioactivity is 2312Bq (Example 1), 5481Bq (Example 2), 3129Bq (Example 3).
[0033] The method for measuring the uniformity of radionuclide distribution on the filter membrane is as follows.
[0034] After the filter membrane dripped with radioactive solution is dried in the shade, on the backing filter membrane, fold the radi...
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The invention belongs to the technical field of radioactive substance detection, and relates to a source dropping method for the standard gamma source of a radioactive aerosol filter membrane. The source dropping method comprises the steps of placing a radioactive solution with known radioactivity activity on a filter membrane for filtration purpose, optimizing parameters including the compositionof the radioactive solution, the size of a source dropping, the spacing of the source dropping, the height of the source dropping, the speed of the source dropping and the like during the source dropping process and realizing the more uniform distribution of the radionuclide on the filter membrane. The source dropping method disclosed by the invention is utilized and then parameters, including the composition of the radioactive solution, the size of a source dropping, the spacing of the source dropping, the height of the source dropping, the speed of the source dropping and the like during the source dropping process of the standard gamma source of the radioactive aerosol filter membrane, can be optimized. As a result, the radionuclide is more uniformly distributed on the filter membrane.
Description
technical field [0001] The invention belongs to the technical field of radioactive substance detection, and relates to a drop source method of a radioactive aerosol filter membrane standard gamma source. Background technique [0002] Nuclear facilities and the use of nuclear technology will emit radioactive substances into the atmosphere, thereby forming radioactive aerosols in the atmosphere, causing internal exposure hazards after inhalation or ingestion. Therefore, it is of great significance to monitor the radioactive aerosols in the surrounding atmosphere, including the radioactive aerosols caused by nuclear facility processes and effluents. It is not only of great significance for the prevention of nuclear accidents and emergency response after nuclear accidents, but also It is also an important reference for checking whether nuclear facilities meet national regulations, providing the main basic data for estimating the collective radiation dose of the public around nuc...
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Login to View More IPC IPC(8): G01T1/02
CPCG01T1/02
Inventor 李明徐利军宋鑫鹏罗瑞刘勇
Owner CHINA INSTITUTE OF ATOMIC ENERGY