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Energy-compensating ambient dose equivalent secondary standard ionization chamber

A surrounding dose equivalent and energy compensation technology, applied in radiation measurement and instruments, can solve the problems of unsuitable fixed value, complicated spectrum resolution process, small uncertainty, etc., to achieve expanded measurement accuracy and strong environmental adaptability , the effect of improving the sensitivity

Inactive Publication Date: 2018-09-21
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uncertainty of the measurement results of "energy spectroscopy" is small, but the process of solving the spectrum is complicated, and it is not suitable for the dose equivalent H around the site. * Fixed value of (10)

Method used

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  • Energy-compensating ambient dose equivalent secondary standard ionization chamber
  • Energy-compensating ambient dose equivalent secondary standard ionization chamber
  • Energy-compensating ambient dose equivalent secondary standard ionization chamber

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Embodiment Construction

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] like figure 1 , 2 , 3, the present invention provides an energy-compensated ambient dose equivalent secondary standard ionization chamber (hereinafter referred to as the ionization chamber), which is used for on-site determination of the ambient dose equivalent of the portable γ-ray radiation field. The collector electrode 2 , the insulating terminal 3 , the current output wire 4 , the energy compensation layer 5 , the stainless steel tube 8 , the bracket 9 and the like are composed.

[0027] The ionization chamber is a closed, hollow spherical structure composed of a shell 1. The collector electrode 2 is spherical and is located at the center of the spherical shell 1. The shell 1 of the ionization chamber is a high-voltage electrode, and also includes a current output passing through the shell 1. Wire 4, one end of the current output wire 4 is c...

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Abstract

The invention belongs to the technical field of in-situ calibration of fixed ambient dose equivalent meter, and in particular relates to an energy-compensating ambient dose equivalent secondary standard ionization chamber for on-site setting the ambient dose equivalent of a portable [gamma] ray radiation field. The energy-compensating ambient dose equivalent secondary standard ionization chamber comprises a collector (2) disposed in a closed ionization chamber formed by a housing (1), the housing (1) of the ionization chamber being a high voltage pole; a current output wire (4) connected to the collector (2) through the casing (1), and an outer side of the housing (1) is provided with an energy compensation layer (5). The energy-compensating ambient dose equivalent secondary standard ionization chamber can be used for setting the ambient dose equivalent H*(10) of the portable [gamma] ray radiation field, and has the characteristics of a good environmental adaptability and a high measurement accuracy for low dose rate.

Description

technical field [0001] The invention belongs to the technical field of in-situ calibration of a fixed peripheral dose equivalent meter, in particular to an energy compensation type peripheral dose equivalent secondary standard ionization chamber. Background technique [0002] Fixed ambient dose equivalent meters are widely distributed in nuclear facilities, including: nuclear reactor halls, fuel element operation areas, evaporator rooms, corridor areas where people often pass, and solid waste treatment workshops, etc., for routine continuous monitoring or after nuclear accidents. Emergency monitoring. This type of instrument has the advantages of high sensitivity, good stability and easy operation, and the monitoring results can be used for personnel protection and evaluation of effective dose E. Due to the fixed installation, it is usually not easy to disassemble and send it to a metrology laboratory for calibration. In order to ensure the accuracy of the fixed ambient do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00
CPCG01T7/005
Inventor 高飞徐阳倪宁
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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