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

Control rod worth measuring method for WWER (water-water energetic reactor) hexagonal lattice core

A measurement method and control rod technology, which is applied in reactors, nuclear reactor monitoring, nuclear power generation, etc., can solve the problems of large measurement errors and low precision, and achieve the effects of saving test time, high measurement precision and simple test process

Active Publication Date: 2017-06-27
NUCLEAR POWER INSTITUTE OF CHINA
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages are high safety, fast measurement speed, and the ability to measure large negative reactivity, but the disadvantage is that the accuracy is low
Since the method is based on the point-pile equation, the relative flux distribution changes significantly before and after the rod falls, and the measurement results are related to the position of the detector, resulting in large measurement errors

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
  • Control rod worth measuring method for WWER (water-water energetic reactor) hexagonal lattice core
  • Control rod worth measuring method for WWER (water-water energetic reactor) hexagonal lattice core
  • Control rod worth measuring method for WWER (water-water energetic reactor) hexagonal lattice core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Such as figure 1 A method for measuring the value of control rods in a WWER hexagonal grid core includes the following steps:

[0041] A. The core is in a critical state by boron adjustment, and the value of the control rods inserted into the stack is within the range of 30pcm to 40pcm, and the detector current outside the pile is less than or equal to 1×10 -8 A;

[0042] B. Lift all the control rods in the reactor out of the reactor, introduce a positive reactivity of about 30pcm to 40pcm, increase the core flux level, and wait for the detector current outside the reactor to rise to 3×10 -8 A;

[0043] C. Insert a group of rods to be tested into the bottom of the core at a maximum controllable speed of 2cm / s. During this process, the external detector records the current change, and the reactivity instrument obtains the detection during the insertion of the rods to be tested in real time. The detector signal R and the rod position signal z of the rod group to be tes...

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 control rod worth measuring method for a WWER (water-water energetic reactor) hexagonal lattice core, comprising a test process and a correction factor calculating process; the test process employs an existing dynamic rod worth measurement method, and a specific process is detailed; the correction factor calculating process employs an AFCF (amplitude function conversion factor) to correct a detector signal R, calculates to obtain dynamic measurement reactivity, and employs an RCF (reactivity conversion factor) to correct the dynamic measurement reactivity to obtain measurement rod unit worth; the method saves time and has high measurement precision.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor design, in particular to a method for measuring the value of control rods of a WWER hexagonal grid core. Background technique [0002] Control rod value measurement is an important part of nuclear power plant start-up physical tests. The consistency between theoretical design and real conditions is checked by comparing theoretical calculation values ​​with experimental measurement values. Power plant reactors require start-up physical tests after new or refueling and before operating at power. Starting the physical test occupies the critical path of the power plant, and shortening the test time means improving the load factor of the power plant, thereby improving the economy of the power plant. [0003] The existing WWER hexagonal grid core control rod value measurement methods are mainly boron engraved rod method and rod drop method. [0004] The basic principle of the boron engraved ro...

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): G21C17/10
CPCG21C17/10Y02E30/30
Inventor 赵文博宫兆虎于颖锐汪量子王晨琳蒋朱敏吴磊巨海涛刘同先王金雨钟旻霄王丹余俊辉
Owner NUCLEAR POWER INSTITUTE OF CHINA
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