Radioactive aerosol sampling and measuring device

A measuring device and radioactive technology, applied in the field of nuclear power, can solve the problems of data fluctuation, detector measurement energy spectrum drift, leakage current and noise increase, etc., to achieve the effect of system data guarantee and particle loss

Pending Publication Date: 2021-05-28
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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Problems solved by technology

However, the radioactive aerosol sampling device in the related art has particle loss and deposition problems, which cannot guarantee the effectiveness of radioactive detector measurement, flow control and data energy spectrum analysis
[0004] In addition, the existing radioactive aerosol sampling devices generally can only monitor the chimney gas at room temperature (within 40°). If the temperature is too high, the energy spectrum drift of the detector measurement, data fluctuation, leakage current and noise will continue to increase.
When the temperature exceeds 80°C, the leakage current will increase exponentially, and the noise floor of the detector will increase greatly, resulting in poor detection performance and unable to monitor normally

Method used

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Embodiment Construction

[0022] 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.

[0023] Please refer to figure 1 As shown, the present invention provides a radioactive aerosol sampling and measuring device, which includes: a radioactive detector 10 (for example: a β / γ integrated detector, using a special high-temperature NaI and a photomultiplier tube, and passing through a high-temperature oven In the experiment, the effective monitoring of plasma waste gas at 150°C to 160°C was realized) the air rectifying cone 20 and the shell shielding body 30 arranged around the air rectifying cone 20, wherein the air rectifying cone 20 and the shell...

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Abstract

The invention discloses a radioactive aerosol sampling and measuring device which comprises an air rectification cone provided with a radioactive detector, a shell shielding body arranged around the air rectification cone and a filter paper feeding mechanism, wherein a gas flow channel gap is formed between the air rectification cone and the shell shielding body; and radioactive aerosol particles are collected on the filter paper after passing through the gap of the flow channel, and generated photons enter the radioactive detector to collect signals. Compared with the prior art, the radioactive aerosol sampling and measuring device is provided with the shell shielding body, the problems of particle loss and deposition in the radioactive aerosol sampling process are solved, and data of a radioactive detector system are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to a radioactive aerosol sampling and measuring device. Background technique [0002] The integrity of the pressure-bearing boundary and containment of the reactor primary circuit of a nuclear power plant is very important. When a serious accident occurs in a nuclear power plant, the pressure-bearing boundary and containment of the primary circuit of the reactor are destroyed, and various artificial radionuclides will be released rapidly in the form of aerosols. Therefore, it is necessary to set up aerosol sampling and monitoring points around the nuclear power plant to determine the degree of radioactive pollution around the nuclear power plant in the event of an accident by measuring the concentration of radioactive aerosols in the atmosphere. [0003] Related technologies have disclosed a variety of radioactive aerosol sampling devices, for ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
CPCG01N1/22
Inventor 雷青欣单陈瑜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
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