Beta-gamma discrimination detection device
A detection device, gamma photon technology, applied in the field of nuclear power, can solve problems such as being unable to adapt to the gaseous flow environment
Pending Publication Date: 2021-06-08
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] However, there is no β-γ screening detection device that can simultaneously monitor β-γ nuclides in the prior art, and the existing aerosol monitoring products cannot adapt to the high temperature (150°C-160°C) gaseous flow environment
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[0025] In order to make the purpose, technical solution and technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
[0026] Please refer to figure 1 As shown, the present invention provides a β-γ discrimination detection device, which includes:
[0027] The transmission filter membrane 10 is used to prevent α particles from entering the detection device and causing miscounting;
[0028] Plastic scintillator 20, used to measure the activity concentration of β particles;
[0029] NaI crystal 40, used to measure gamma photons, obtain energy spectrum data, and output the activity concentration of nuclides;
[0030] A high-temperature photomultiplier tube 60 is used to receiv...
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Abstract
The invention discloses a beta-gamma discrimination detection device, which comprises a transmission filter membrane used for preventing alpha particles from entering the detection device to cause miscounting; a plastic scintillator, used for measuring the activity concentration of beta particles; an NaI crystal, used for measuring gamma photons to obtain energy spectrum data and outputting activity concentration of nuclides; a high-temperature photomultiplier, used for receiving secondary electrons generated by the gamma photons and outputting voltage amplitude pulse signals; a voltage division / pre-amplification circuit, providing an input power supply for the high-temperature photomultiplier and the pre-amplification circuit and used for amplifying an output signal of the high-temperature photomultiplier; and an electrical interface. Compared with the prior art, the beta-gamma screening and detecting device adopts a combination mode of the plastic scintillator and the NaI crystal, and beta-gamma nuclides can be monitored at the same time.
Description
technical field [0001] The invention belongs to the technical field of nuclear power. More specifically, the invention relates to a beta-gamma discrimination detection device, which can be used for aerosol radioactivity monitoring in gaseous discharge streams related to nuclear power facilities. Background technique [0002] In the field of nuclear power technology, aerosol monitoring products include alpha, beta monitors and gamma monitors. α and β are used in nuclear power plant chimney exhaust radiation monitoring system and regional personnel radiation monitoring system. High-resolution PIPS semiconductor detectors are used to analyze the α and β energy spectra. Gamma monitors generally use NaI detectors, which have nuclide Identification and activity measurement functions. [0003] However, there is no β-γ screening detection device capable of simultaneously monitoring β-γ nuclides in the prior art, and existing aerosol monitoring products cannot adapt to high-temperat...
Claims
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Login to View More IPC IPC(8): G01T1/167G01T1/203
CPCG01T1/167G01T1/203
Inventor 单陈瑜雷青欣刘夏杰刘春雨林鹏谢文章蒋丹枫林有奇常康周浩
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD