Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Calculation Method for Radial Power Distribution of Thorium-Based Mixed Oxide Fuels

A technology of mixed oxides and radial power, applied in chemical process analysis/design, computational theoretical chemistry, instruments, etc., to achieve the effects of reducing calculation time, accurate nucleon density changes, and improving calculation accuracy

Active Publication Date: 2022-05-24
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So using the existing UO 2 The radial power model of fuel is obviously not suitable for simulating thorium-based MOX fuel

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
  • A Calculation Method for Radial Power Distribution of Thorium-Based Mixed Oxide Fuels
  • A Calculation Method for Radial Power Distribution of Thorium-Based Mixed Oxide Fuels
  • A Calculation Method for Radial Power Distribution of Thorium-Based Mixed Oxide Fuels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a method for calculating the radial power distribution of a thorium-based mixed oxide fuel. In the fuel rod, the coupling of Fick's law and the resonance capture empirical function is used to calculate the neutron flux and the variation of the nuclei in the fuel rod. , including the following steps:

[0061] S1: First pass the formula according to the proposed situation Calculate the initial nuclear density of the fuel in the fuel rod, as the premise of processing, where A is the nuclear density of the fuel, ρ is the mass density of the fuel, M is the relative atomic mass of the fuel, N A is Avogadro's constant;

[0062] S2: Estimate the current neutron flux distribution based on the total cross section of the fuel rod and the Bessel function;

[0063] In this embodiment, the normalized power distribution factor is calculated by using the normalized neutron flux estimated by the Bessel function;

[0064] because 238 U and 232 The resonance...

Embodiment 2

[0093] This embodiment provides a calculation system for radial power distribution of thorium-based mixed oxide fuel, including: an initial nuclear density calculation module, a flux distribution calculation module, a nuclear density change calculation module, and a fuel radial power distribution calculation module ;

[0094] In this embodiment, the initial nuclear density calculation module is used to calculate the initial nuclear density of the fuel in the fuel rod;

[0095] Calculate the initial nuclear density of the fuel in the fuel rod, the specific calculation formula is:

[0096]

[0097] where ρ is the mass density of the fuel, A is the nuclear density of the fuel, M is the relative atomic mass of the fuel, and N A is Avogadro's constant.

[0098] In this embodiment, the flux distribution calculation module is used to estimate the current neutron flux distribution based on the total cross section of the fuel rod and the Bessel function, and use Fick's law to calc...

Embodiment 3

[0128] This embodiment also provides a storage medium. The storage medium may be a storage medium such as a ROM, a RAM, a magnetic disk, an optical disk, etc., and the storage medium stores one or more programs. When the programs are executed by the processor, the above-mentioned Embodiment 1 is implemented. Calculation method of radial power distribution of thorium-based mixed oxide fuel.

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 calculation method for the radial power distribution of thorium-based mixed oxide fuel. The method calculates the magnitude of the neutron flux and the change of the inner element of the fuel rod by adopting Fick's law coupled with the resonance capture empirical function, and at the same time The distribution of the flux is estimated by Fick's law, and the change of the fuel composition is calculated according to the flux and the empirical function. The present invention is based on traditional UO 2 Fuel Radial Power Model A radial power calculation model for thorium-based mixed oxides was developed, taking into account 232 Th and 238 The resonance of U is captured from the screen effect, so the fuel radial power distribution obtained by using the present invention will be more accurate.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor power calculation, in particular to a method for calculating radial power distribution of thorium-based mixed oxide fuel. Background technique [0002] During the operation of thorium-based fuel in the reactor, due to 238 Resonant capture of epithermal neutrons by U, 239 The accumulation of Pu on the outer surface of the fuel cladding is significantly larger. This will result in higher fuel power peaks and thus deeper burnup of fuel on the fuel surface. This makes the radial power distribution of thorium-based fuels quite different from that of conventional uranium dioxide fuels. So use the existing UO 2 The radial power model of the fuel to simulate the thorium-based mixed oxide fuel is obviously not suitable. At present, mixed oxides dominated by thorium-based fuels are becoming the research focus for the development of accident-resistant fuels. Considering the power distribution of...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/10G16C10/00
CPCG16C20/10G16C10/00
Inventor 刘荣邱晨杰蔡杰进杨锦琛
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com