Method and a system for estimating near-distance diffusion parameters of a nuclear power plant site

A nuclear power plant, short-distance technology, applied in the field of nuclear environment, can solve the problems of inability to carry out multi-site, long-term deployment, high price of three-dimensional turbulent fluctuation observation equipment, and easy damage

Active Publication Date: 2019-05-10
CHINA INST FOR RADIATION PROTECTION
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cheaper than the atmospheric diffusion tracer experiment, but the three-dimensional turbulent fluctuation observation equipment is expensiv

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and a system for estimating near-distance diffusion parameters of a nuclear power plant site
  • Method and a system for estimating near-distance diffusion parameters of a nuclear power plant site
  • Method and a system for estimating near-distance diffusion parameters of a nuclear power plant site

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0078] The present invention will be further described in detail below with reference to the drawings and specific implementations of the specification.

[0079] In addition to the use of three-dimensional turbulence observation equipment with a higher response frequency, the acquisition of atmospheric boundary layer turbulence fluctuations can also be obtained through boundary layer parameterization methods and through conventional meteorological data calculations. Considering that nuclear power plants in my country are often equipped with conventional meteorological observation towers, the present invention proposes a method for estimating diffusion parameters within close range of nuclear facilities by using conventional meteorological tower observation data and combining the atmospheric boundary layer parameterization method with Taylor formula. details as follows.

[0080] Such as figure 1 As shown, a method for estimating the near-distance diffusion parameters of a nuclear p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method and a system for estimating short-distance diffusion parameters of a nuclear power plant site. The method comprises the following steps: S1, selecting year-round conventional hour-by-hour meteorological observation data of an iron tower of the nuclear power station plant site; s2, estimating the ground roughness of a factory site according to the meteorological observation data; s3, calculating the annual hourly turbulent flow energy, the turbulence characteristic length scale and the Rich's number of the factory site, and further calculating the correspondingturbulence pulsation speed and the Lagrangian time scale; s4, substituting the turbulence pulsation speed and the Lagrangian time scale obtained through calculation into a Taylor formula, and solvingcorresponding diffusion parameters; and S5, carrying out curve fitting on the diffusion parameters of the factory site year by year and the corresponding Rush's number, carrying out stability divisionon weather conditions according to the Rush's number, and selecting the minimum diffusion parameter in each stability interval as the diffusion parameter under the type of stability. The method and the system provided by the invention are easy to implement; and the calculated diffusion parameters are established on the whole-year observation data, so that the representativeness is relatively comprehensive.

Description

Technical field [0001] The present invention relates to the field of nuclear environment, in particular to a method and system for estimating close-distance diffusion parameters of a nuclear power plant site. Background technique [0002] At present, the methods for evaluating the migration and diffusion of airborne radioactive materials released by nuclear facilities mainly include Euler's method and Lagrangian method. A large part of the Lagrangian method requires the diffusion parameters of the nuclear facility site as input. Evaluate the migration and diffusion of radioactive materials. In actual work, the evaluation methods of diffusion parameters mainly include the following two: 1) Atmospheric diffusion tracer experiment. Generally, atmospheric tracer is released at the plant site, and the atmospheric diffusion parameters of the dominant wind downward are estimated based on the sampling results. This method is close to In practice, but the experimental period is long and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
Inventor 赵多新姚仁太陈龙泉黄莎吕明华徐向军张俊芳闫江雨辛存田张芳
Owner CHINA INST FOR RADIATION PROTECTION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap