A Calculation Method for Reactor Embedded Resonance Self-shielding

A reactor and embedded technology, applied in the field of nuclear reactor physical calculation, achieves the effect of high precision and strong geometric adaptability

Active Publication Date: 2019-04-09
XI AN JIAOTONG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the existing resonance self-shielding calculation method, the present invention proposes a reactor embedded resonance self-shielding calculation method, which uses the characteristic line method to perform fixed source transport calculation on the non-uniform geometry of the reactor to obtain a relatively Good geometric adaptability; for the resonant fuel area, calculate its background cross-section, and perform interpolation calculation on the resonance cross-section table in the multi-group database, which has high calculation efficiency; at the same time, the resonance cross-section table used in this method is calculated simply dimensional fuel cell problem, this treatment makes the resonance self-shielding calculation have higher accuracy; in the whole process, because of the use of single-group stationary source transport solution to consider the influence of reactor non-uniform geometry on the resonance self-shielding effect , the resonance calculation is embedded in the transport calculation process, which is consistent with the transport calculation results

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 Reactor Embedded Resonance Self-shielding
  • A Calculation Method for Reactor Embedded Resonance Self-shielding
  • A Calculation Method for Reactor Embedded Resonance Self-shielding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] The specific implementation of embedded resonance self-screen computing can be mainly described as:

[0053] A new resonance cross-section table is generated from the resonance self-shielding cross-section table based on one-dimensional fuel cells, and the resonance cross-section table in the original nuclide cross-section database is replaced to improve the nuclide cross-section database. Use this improved database to perform embedded iterative calculations based on fixed source calculations and interpolation calculations to obtain effective resonance self-shielding sections, such as figure 1 shown.

[0054] In the implementation process of embedded iterative calculation based on fixed source calculation and interpolation calculation, it is necessary to use the resonant self-shielding section table related to temperature and background section. The resonance self-screening cross-section table cannot use the default table in the original multi-group nuclide cross-secti...

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

A reactor embedded resonance self-shielding calculation method, the steps are as follows: (1) calculation based on the resonance section table of one-dimensional fuel cell; (2) embedded iterative calculation based on fixed source calculation and interpolation calculation; step (1) to obtain Geometry-dependent resonance cross-section table, the resonance cross-section table is designed according to the geometry of the actual reactor fuel cell, used to replace the conventional resonance cross-section table in the original multi-group nuclide cross-section database, resulting in an improved multi-group nuclide cross-section database, Step (2) is performed based on the improved multi-group nuclide section database to obtain the effective resonance self-shielding section of each region in the reactor; step (2) is the main body of the embedded resonance calculation, and step (1) provides the necessary Resonance database; because the present invention uses the transport solution of a single group of stationary sources to consider the influence of reactor non-uniform geometry on the resonance self-shielding effect, the resonance calculation is embedded in the transport calculation process, which is consistent with the transport calculation results .

Description

technical field [0001] The invention relates to the field of nuclear reactor physical calculations, in particular to a reactor embedded resonance self-screen calculation method. Background technique [0002] Resonance self-shielding calculation is an important part of reactor physics calculation. The main task of calculation is to provide effective multi-group cross-section for transport calculation. Effective multi-group cross-section can ensure the conservation of neutron reaction rate in transport calculation. The effective multi-group cross-section is calculated by merging the continuous energy cross-section according to the weight of the energy spectrum. Because the continuous energy neutron reaction cross section of the main fission nuclide of the reactor has a resonant peak in the thermal neutron energy region, the energy spectrum in this energy region has a depression corresponding to the resonant peak, and the neutron flux density decreases, forming a neutron sub-s...

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): G06F17/50
CPCG06F30/13
Inventor 吴宏春张乾曹良志祖铁军
Owner XI AN JIAOTONG UNIV
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