Complex environment emission/release nuclide dose calculation method

A technology of complex environment and calculation methods, applied in the direction of design optimization/simulation, etc., can solve the problems of not considering the impact of impact assessment, differences in radionuclide emission characteristics, etc., and achieve scientific and reasonable calculation methods with strong applicability. Effect

Active Publication Date: 2020-05-15
NUCLEAR & RADIATION SAFETY CENT
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Problems solved by technology

[0003] However, the existing calculation methods for radionuclide atmospheric diffusion and dose of nuclear facilities have the following problems. On the one hand, the site terrain is required to be flat; secondly, the influence of the actual surface roughness of the nuclear facility site is not considered.
Existing radionuclide atmospheric diffusion and dose calculation methods do not consider the influence of complex terrain conditions and surface roughness on the assessment of

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  • Complex environment emission/release nuclide dose calculation method
  • Complex environment emission/release nuclide dose calculation method
  • Complex environment emission/release nuclide dose calculation method

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Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] A method for calculating the dose of nuclide discharged / released in a complex environment, comprising the following steps:

[0047] (1) Analyze the atmospheric diffusion characteristics of radionuclides in the complex environment of nuclear facilities based on meteorological observation data, and calculate the nuclide concentrations CON(x,y,z) at different distances downwind according to the release source item of nuclear facilities;

[0048] The way to calculate the nuclide concentration at different distances downwind is:

[0049]

[0050] Among them, CON(x, y, z) is the nuclide concentration at the downwind distance (x, y, z), S H is the source strength (Bq / s), w s is the average wind speed, σ y is the standard deviation of the concentration distribution function in the y direction, σ z is the standard deviation of th...

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Abstract

The invention discloses a complex environment emission/release nuclide dose calculation method. The method comprises the steps of calculating nuclide concentrations at different distances in a downwind direction according to a nuclear facility release source item; calculating the nuclide concentration in the downwind direction of the smoke plume center line in the complex environment according tothe topographic characteristics of the nuclear facility site; calculating the emission height of the smoke plume in the complex environment of the nuclear facility when the atmospheric stability is neutral or unstable; calculating the radionuclide concentration in the downwind direction of the central line of the smoke plume released by the nuclear facility under the influence of surface roughness; calculating accident atmospheric dispersion factors of the nuclear facility complex environment in different time periods; and calculating the public personal effective dose and thyroid dose causedby radionuclide when the nuclear facility complex environment accident is released. The method has the advantages that the calculation method is scientific, reasonable and high in applicability, is animportant technical means for radionuclide environmental impact evaluation under complex environmental conditions, and has important significance in the technical field of radionuclide atmospheric environmental impact evaluation.

Description

technical field [0001] The invention belongs to a method for assessing the environmental impact of radionuclides under complex environmental conditions for nuclear facilities, in particular to a method for calculating the dose of radionuclide discharged / released in complex environments. Background technique [0002] When accidents occur in nuclear facilities, radionuclides will be released into the atmosphere in the form of gases and aerosols. Radionuclides will cause radiation impacts on the public through the process of atmospheric diffusion and different exposure routes. A nuclear facility environmental impact assessment method provides a nuclear facility radionuclide atmospheric diffusion and dose impact calculation method. [0003] However, the existing calculation methods for radionuclide atmospheric diffusion and dose of nuclear facilities have the following problems. On the one hand, the site terrain is required to be flat; secondly, the influence of the actual surfa...

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Application Information

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IPC IPC(8): G06F30/20
Inventor 郭瑞萍陈海英刘福东
Owner NUCLEAR & RADIATION SAFETY CENT
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