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Artificial radionuclide dissolvability monitoring method and apparatus

A radionuclide and monitoring device technology, which is applied in the field of artificial radionuclide solubility monitoring, can solve the problems of monitoring failure, easily affecting detection sensitivity, interference, etc., and achieve the effect of improving measurement efficiency

Active Publication Date: 2016-10-12
NANHUA UNIV
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Problems solved by technology

[0003] At present, the emergency monitoring of artificial radionuclide (such as U, Pu) aerosols in nuclear accidents is often susceptible to severe interference from radon and its daughter products in the environment, which may even cause monitoring failure
At present, decay method, ratio method, false coincidence method or energy screening method are usually used at home and abroad to overcome the interference of natural background radon and its progeny in the environment, while energy spectrum measurement is based on factors such as sample self-absorption and radon progeny. There is a certain proportional relationship between the energy degradation of body α particles falling in the low-energy artificial α-nuclide energy region and its own count in the natural channel, so the count compensation in the natural channel is easily affected by the fluctuation of the compensation coefficient during the compensation process. Detection sensitivity

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  • Artificial radionuclide dissolvability monitoring method and apparatus

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Embodiment Construction

[0035] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] refer to figure 1 , is a schematic diagram of the steps of the artificial radionuclide solubility monitoring method in an embodiment of the present invention.

[0037] Propose a kind of artificial radionuclide concentration monitoring method in one embodiment of the present invention, comprise:

[0038] Step S1, according to the pulse signal measured by the semiconductor detector 1, extract 214 Bi- 214 Po coincidence event; the above-mentioned pulse signal includes α pulse signal and β pulse signal;

[0039] Step S2, according to the pulse signal measured by the semiconductor detector 1 and the extracted 214 Bi- 214 Po coincides with the event and calculates the artificial radionuclide concentration.

[0040] Semiconductor detector 1 is used to detect alpha and beta rays in the aerosol, measure alpha puls...

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Abstract

The invention puts forward an artificial radionuclide dissolvability monitoring method and apparatus. The method comprises the following steps: according pulse signals detected by a semiconductor detector, a 214Bi-214Po coincidence event is extracted; the pulse signals comprise alpha pulse signals and beta pulse signals, and artificial radionuclide concentration is calculated according to the pulse signals detected by the semiconductor detector and the extracted 214Bi-214Po coincidence event. Via use of the artificial radionuclide dissolvability monitoring method and apparatus provided in the invention, effects exerted on artificial radionuclide aerosol measurement by 214Bi-214Po can be eliminated at presence of radon and a radon daughter background, and measurement efficiency can be improved.

Description

technical field [0001] The invention relates to the field of radionuclide monitoring, in particular to an artificial radionuclide solubility monitoring method and device. Background technique [0002] Artificial radionuclides such as uranium and plutonium, which are highly toxic and have a long half-life, mainly undergo alpha decay. After the public or workers inhale radioactive aerosols containing uranium, plutonium and other nuclides, some of the radioactive substances will be converted into insoluble hydrogen. Oxides exist in the form of oxides and remain in the human body for a long time, causing serious harm to human health. Therefore, from the perspective of radiation management, rapid and accurate monitoring of artificial α-radioactive aerosol is an important content of radiation protection and evaluation in workplaces such as nuclear industry manufacturing, nuclear fuel processing and reprocessing, and nuclear facility operation; Internal exposure of personnel is al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167G01T1/24
CPCG01T1/167G01T1/24
Inventor 颜拥军曹真伟彭航青先国朱宏亮
Owner NANHUA UNIV
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