Method for calculating biological radiation dose of inert gas

An inert gas, calculation method technology, applied in the field of nuclear radiation assessment, can solve problems such as incomplete calculation model and calculation parameters, no standard specification, affecting biological radiation impact assessment work, etc.

Pending Publication Date: 2019-09-27
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

[0007] However, there are few studies on the calculation of biological radiation dose of inert gases, the calculation model and calculation parameters are not complete, and there is no relevant standard specification, which affects the development of biological radiation impact assessment.

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  • Method for calculating biological radiation dose of inert gas
  • Method for calculating biological radiation dose of inert gas
  • Method for calculating biological radiation dose of inert gas

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Embodiment Construction

[0051]The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0052] The flow chart of the calculation method of the exemplary inert gas biological radiation dose of the present invention is as follows figure 1 shown, including the following steps.

[0053] The first step is to calculate the activity concentration of noble gases in the air.

[0054] According to the process design of this nuclear power plant, the annual emission of inert gas Kr-85 in the gaseous effluent is 2.20×10 12 Bq / a; according to the meteorological conditions at the location of the plant site and the emission design parameters, conservative considerations, the maximum value of the atmospheric dispersion factor around the site is 5.74×10 -7 s / m 3 , according to the formula (1), the radioactivity concentration of Kr-85 in the air is calculated to be 4×10 -2 Bq / m 3 .

[0055] The second step is to determine the refe...

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Abstract

The invention belongs to the technical field of nuclear radiation evaluation, and relates to a method for calculating the biological radiation dose of inert gas. The calculation method comprises the following steps: (1) calculating the radioactive activity concentration of inert gas in air according to an inert gas emission source item of a nuclear facility and surrounding environment conditions of a factory site; (2) carrying out terrestrial ecological environment survey around a factory site, and determining a reference organism type; (3) calculating the internal irradiation dose rate of the reference organism according to the radioactive activity concentration of the inert gas in the air, the concentration factor and the internal irradiation dose rate conversion factor; (4) calculating the external irradiation dose rate of the reference organism according to the radioactive activity concentration of the inert gas in the air, the residence factor and the external irradiation dose rate conversion factor; and (5) calculating the total dose rate according to the internal and external irradiation dose rates of the reference organism. By utilizing the calculation method provided by the invention, the blank in China can be filled, and the calculation method of the inert gas biological radiation dose is provided.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation evaluation, and relates to a method for calculating biological radiation doses of inert gases. Background technique [0002] During normal operation of nuclear facilities, gaseous effluents will be emitted to the environment, and these gaseous effluents will have radiation effects on terrestrial organisms around the site. Therefore, the radiation impact on terrestrial organisms needs to be evaluated in the environmental impact assessment reports of nuclear facilities at each stage . [0003] At present, the more commonly used biological radiation impact assessment program in China is the ERICA program developed by the European Community (EC), but this program cannot calculate the radiation dose caused by inert gases to terrestrial organisms. In the gaseous effluent discharged from nuclear facilities such as nuclear power plants and reprocessing plants, the emission of radioisotopes of i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G01T1/02
CPCG01T1/02G06Q10/063
Inventor 魏其铭杜红燕白晓平王晓亮郑伟
Owner CHINA NUCLEAR POWER ENG CO LTD
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