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A Calculation Method for the Concentration Level of Radioactive Contamination of General Consumer Products after a Nuclear Accident

A calculation method and consumer product technology, applied in the field of nuclear radiation evaluation, can solve the problems that the steady-state model does not consider the dynamic mode of radionuclide activity concentration, panic, and over-conservative simulation results, etc.

Active Publication Date: 2022-05-20
CHINA NUCLEAR POWER ENG CO LTD
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  • Claims
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Problems solved by technology

The steady-state model does not consider the dynamic way in which the radionuclide activity concentration changes with time, and each transfer parameter under the model corresponds to the value in the equilibrium state, which makes the simulation results unnecessarily conservative and brings inconvenience to the public. necessary panic

Method used

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  • A Calculation Method for the Concentration Level of Radioactive Contamination of General Consumer Products after a Nuclear Accident
  • A Calculation Method for the Concentration Level of Radioactive Contamination of General Consumer Products after a Nuclear Accident
  • A Calculation Method for the Concentration Level of Radioactive Contamination of General Consumer Products after a Nuclear Accident

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Embodiment Construction

[0086] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0087] An exemplary calculation method of the radioactive pollution concentration level of general consumer products after a nuclear accident of the present invention includes the following steps:

[0088] (1) For the soil-plant ecosystem, establish the radionuclide concentrations shown below for different, independent control bodies (including plant surface, plant internal tissue, surface soil, unstable soil layer and stable soil layer) First-order differential equations related to time differential, solve the first-order differential equations composed of these first-order differential equations.

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[0090]

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[0094] in:

[0095] Q vs is the activity concentration of radionuclides in the plant surface per unit area (Bq / m 2 );

[0096] Q vi is the activity concentration of radi...

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Abstract

The invention belongs to the technical field of nuclear radiation evaluation, and relates to a method for calculating the radioactive pollution concentration level of general consumer goods after a nuclear accident. Described computing method comprises the following steps: (1) for soil-plant ecosystem, set up the first-order differential equations of radionuclide concentration and time differential relation respectively to different, independent control body respectively, solve these first-order differential equations (2) On the basis of step (1), determine the distribution and distribution of radionuclides, and consider the soil-crop transfer route and soil-grass-animal product transfer route respectively, In this way, the pollution concentration level of radionuclides in general consumer products after a nuclear accident can be calculated. By using the calculation method of the invention, it is possible to more accurately estimate the nuclide pollution level in general consumer goods after a nuclear accident, and design the ingestion emergency planning area of ​​a nuclear power plant more closely to reality.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation evaluation, and relates to a method for calculating the radioactive pollution concentration level of general consumer goods after a nuclear accident. Background technique [0002] An ingestion emergency planning area should be established around the nuclear power plant for ingestion exposure routes, so that relevant emergency measures can be arranged for the determined ingestion emergency planning area during the emergency planning stage of the nuclear power plant. [0003] How to accurately simulate the migration process of nuclides in the food chain and assess the concentration levels of main nuclides in different foods is an important basis for rationally dividing the ingestion emergency planning area of ​​nuclear power plants, and it is also an issue that the nuclear industry needs to clarify at the level of public communication important topic. In previous nuclear power plant accid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/30G06F17/13
CPCG06F2219/10Y02E30/00
Inventor 王梦溪薛娜龙亮刘新建邱林
Owner CHINA NUCLEAR POWER ENG CO LTD