18-month feed replacement method for 1-million kW unit of China voltage water pile nucleus power station

A pressurized water reactor nuclear power plant and unit technology, applied in the direction of nuclear power generation, reactor fuel elements, reactors, etc., can solve the problems of low fuel consumption, short fuel assembly cycle, etc., to achieve extended cycle, high economy and operational flexibility , the effect of improving fuel consumption

Active Publication Date: 2008-08-13
DAYA BAY NUCLEAR POWER OPERATIONS & MANAGEMENT
View PDF0 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide an 18-month refueling method for a one-million-kilowatt unit of a pressurized water reactor nuclear power plant in China, aiming at solving the prob

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
  • 18-month feed replacement method for 1-million kW unit of China voltage water pile nucleus power station
  • 18-month feed replacement method for 1-million kW unit of China voltage water pile nucleus power station

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0012] In the embodiment of the present invention, in the first cycle, the fuel assembly with high enrichment is placed in the outer area of ​​the core, and the fuel assembly with low enrichment is placed in the inner area of ​​the core; in the subsequent cycles, the new fuel assembly is placed in the reactor. In the inner core area, burnt up fuel assemblies are placed in the outer core area. By increasing the enrichment of fuel assemblies and changing the number of combustible poisons, a completely low leakage loading is realized.

[0013] The reactor core of the PWR nuclear power plant is com...

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 present invention is suitable for stack core fuel management field of pressureized water reactor, provides a method for changing fuel of million kilowatt machine set of Chinese pressureized water reactor nuclear power plant for eighteen months. The method includes the steps as follows: in the first circulation, improving the enrichment degree of original reactor core fuel component, and changing arrangement mode of burnable poison, as well as reaching a circulation length of eighteen mouths during the first circulation; in the behind circulation, to improve the enrichment degree of the fuel component further from the second circulation, and transferring into a balance circulation rapidly, by means of changing fuel for each eighteen mouths, and only changing fuel component of one second to one third reactor core, and placing new fuel component within the reactor core, the burn-up fuel component is placed outside the reactor core. The method implements a circulation length of 473 equivalent days at full capacity, and prolongs circulation period and improves fuel consumption, as well as implements completely low neutron leakage load in the behind circulation, and has quite supernal economical efficiency and working flexibility.

Description

technical field [0001] The invention belongs to the field of pressurized water reactor core fuel management, and in particular relates to an 18-month refueling method for a one-million-kilowatt unit of a Chinese pressurized water reactor nuclear power plant. Background technique [0002] In the reactor core fuel assembly layout of the PWR nuclear power plant, the traditional loading mode in the reactor core is the high leakage (OUT-IN) mode, that is, the core fuel assembly is divided into three enrichment areas according to the enrichment degree. The fuel assembly with the highest enrichment is placed in the outer area of ​​the core, and the other two fuel assemblies with lower enrichment are arranged in the inner area of ​​the core in the manner of a chessboard. The refueling is usually an annual refueling, each refueling replaces 1 / 3 of the core fuel assemblies, removes the fuel assemblies with the deepest burn-up, puts new fuel assemblies into the outer area, and puts the...

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): G21C19/00G21C19/20
CPCY02E30/30
Inventor 肖岷高立刚张洪李雷韩庆浩戴忠华李晓明
Owner DAYA BAY NUCLEAR POWER OPERATIONS & MANAGEMENT
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