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

Method for improving integrated reliability of nuclear power station safety injection system

A reliable, pressurized water reactor nuclear power plant technology, applied in the direction of nuclear power generation, climate sustainability, nuclear engineering, etc., can solve the problems of large evaporation, high consumption, frequent water replenishment, etc., to reduce the low temperature alarm value and improve power generation efficiency , Eliminate the effect of operation and maintenance

Inactive Publication Date: 2007-10-03
DAYA BAY NUCLEAR POWER OPERATIONS & MANAGEMENT
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since the concentrated boron water tank needs to operate at high temperature (otherwise it will crystallize), the evaporation capacity is large and the water replenishment is frequent. Long-term use will lead to the increase of impurities in the safety injection system, and the crystallization and blockage of related equipment and pipelines will reduce the availability of the safety injection system. IO( Refers to "equipment unavailable") consumes a lot, and also brings great difficulties to normal operation and maintenance

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 for improving integrated reliability of nuclear power station safety injection system
  • Method for improving integrated reliability of nuclear power station safety injection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Figure 2 is a schematic diagram of the safety injection system and the concentrated boron water tank in the present invention. The safety injection system is one of the most important safety systems of nuclear power plants. It is a system used to inject boron water into the reactor. The concentrated boron water tank 7 is located on the pipeline connected to the primary circuit of the reactor in the safety injection system, which is marked with 004BA in the figure. After the safety injection system is started, boron water with a certain concentration is first injected into the reactor to ensure the safety of the reactor in the event of an accident.

[0015] The invention provides a method for solving the problems caused by the previous concentrated boron water tank with a boron concentration of 21,000 ppm. That is, the boron concentration in the concentrated boron water tank is reduced to 7000-9000ppm, which can fundamentally solve the above problems. Replace the 21000ppm bo...

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 discloses a method of raising the integral reliability of safety injection system of pressurized water reactor in nuclear power station. The concentrated boron water tank is set in the connection pipeline of loop from the safety injection system to the pressurized water reactor. The method includes the following steps: mixing crystallized boron and deionized water, controlling the boron concentration inside the concentrated boron water tank in 7000-9000 ppm, and setting the low temperature warning value of the concentrated boron water tank as 35 deg.c. The present invention can eliminate pipeline jamming caused by boron crystal and raise the reliability of the safety system in pressurized water reactor nuclear power station.

Description

Technical field [0001] The invention relates to a method for improving the overall reliability of the safety injection system of a pressurized water reactor nuclear power plant, in particular to a method for improving the overall reliability of the safety injection system by reducing the concentration of boron in a concentrated boron water tank. Background technique [0002] The pressurized water reactor nuclear power plant is currently a relatively widely used nuclear reactor power plant. Its characteristic is that the water does not boil in the core, so the water must be kept under high pressure. Figure 1 shows a schematic diagram of a pressurized water reactor. A core 1 (including fuel element rods) is provided in the pressure shell 2. The pressure inside the pressure shell 2 can reach more than 100 atmospheres. The water can be heated to above 330°C. The water that has increased in temperature enters the steam generator. There are many thin tubes in the steam generator. The w...

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): G21C9/00
CPCY02E30/32Y02E30/30
Inventor 肖岷黄文有
Owner DAYA BAY NUCLEAR POWER OPERATIONS & MANAGEMENT
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