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Nuclide recognition device of radioactive aerosol

An identification device and aerosol technology, applied in the field of nuclear radiation detection, can solve problems such as inability to distinguish nuclide types, difficulty in deducting environmental background, etc., and achieve good energy resolution characteristics and a large range of effects

Inactive Publication Date: 2014-01-29
NAVAL UNIV OF ENG PLA +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a radioactive aerosol nuclide identification device in order to overcome the shortcomings of the existing measurement methods that cannot distinguish the nuclide types and that it is difficult to deduct the environmental background , which is mainly used in radioactive aerosol measurement in environmental monitoring. The present invention uses lanthanum bromide detectors to detect gamma rays produced by radionuclides, which greatly improves the nuclide resolution capability of the device and makes it easier to deduct the environmental background

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  • Nuclide recognition device of radioactive aerosol
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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the drawings.

[0015] Such as figure 1 , 2 As shown, this embodiment provides a radioactive aerosol nuclide identification device, which is composed of an aerosol detection system, an airflow loop system, and an electrical system. The aerosol detection system is installed in a lead shield 11 with a thickness of 5 cm, and the lanthanum bromide detector 4 is fixed in the cavity 2 formed by the gas sampling circuit by a fixing structure 6. The lanthanum bromide detector 4 uses the lanthanum bromide crystal 5 as the detection medium to realize the energy spectrum measurement of gamma rays. The use of the lanthanum bromide detector 4 enables the present invention to identify the types of nuclide while measuring the environmental radiation level. The lanthanum bromide detector 4 is equipped with a source detector to check whether the lanthanum bromide detector fails. The outlet of the gas sampling circui...

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Abstract

The invention relates to the technical field of radiation detection and provides a nuclide recognition device using lanthanum bromide to measure radioactive aerosol in the air. The nuclide recognition device comprises an aerosol detecting system, an air flow circuit system and an electric system. The aerosol detecting system comprises a gas sampling circuit, a lanthanum bromide detector and an automatic paper feed mechanism. The lanthanum bromide detector is fixed in a cavity formed by the gas sampling circuit. The automatic paper feed mechanism is disposed at the outlet of the gas sampling circuit. The gas sampling circuit comprises a rotary drum and filter paper fixed at two ends. The nuclide recognition device has the advantages that the lanthanum bromide detector is used to detect the gamma ray generated by the radioactive nuclide, nuclide recognition capability of the device is increased greatly, and environmental background can be removed easily.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a nuclide identification device for measuring radioactive aerosols in the atmosphere by using a lanthanum bromide detector in environmental monitoring. Background technique [0002] In the daily operation of nuclear power plants, the integrity of the pressure-bearing boundary of the primary circuit of the reactor and the integrity of the containment vessel are very important. When a serious accident occurs in the power plant, both are destroyed, and various artificial radionuclides will be released rapidly in the form of aerosols. In the ambient atmosphere, aerosol sampling and monitoring points can be set around the power station to determine the degree of radioactive pollution around the power station in the event of an accident by measuring the concentration of radioactive aerosols in the atmosphere. [0003] At present, the radioactive aerosol monitoring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/202
Inventor 龚玉巍贾铭椿郭智荣陈祥磊
Owner NAVAL UNIV OF ENG PLA
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