Method for controlling concentration of sulfate radical of pressurized water reactor nuclear power plant unit-loop

A pressurized water reactor nuclear power plant and sulfate technology, which is applied in nuclear power generation, nuclear engineering, reactors, etc., can solve the problems such as failure to remove sulfate, unidentified source, and inability to remove sulfate, so as to optimize water quality control, The effect of eliminating hidden dangers in operation and avoiding economic losses

Active Publication Date: 2013-06-26
JIANGSU NUCLEAR POWER CORP
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Judging from the research information of domestic and foreign counterparts, there is no information and experience that can be used to remove sulfate radicals. Russian nuclear power plants have also encountered the same problem. Some nuclear power plants have a maximum concentration of sulfate radicals of 3000 micrograms per liter, and some power plants have carried out 2 years of scientific research, but the real source has not been identified so far, and the removal of sulfate radicals is naturally impossible to start

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 controlling concentration of sulfate radical of pressurized water reactor nuclear power plant unit-loop
  • Method for controlling concentration of sulfate radical of pressurized water reactor nuclear power plant unit-loop
  • Method for controlling concentration of sulfate radical of pressurized water reactor nuclear power plant unit-loop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The present invention adopts the idea of ​​reducing the release of sulfonic acid groups from the cationic resin and removing the sulfonic acid groups in the boron-containing water storage system 2 at the same time, so as to achieve the purpose of reducing the concentration of sulfate radicals by utilizing the operation mode of the existing purification system.

[0021] Reducing the release of sulfonic acid groups from the cation resin: the loss of sulfonic acid groups after the cation resin is oxidized is a common feature of the cation resin. Reducing the oxidation of boric acid in the spent fuel pool 1 requires changing the water quality in the spent fuel pool, which is not allowed by nuclear safety . Only by reducing the amount of cation resin in the purification system, considering that there are two purification units equipped with cation res...

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 provides a method for controlling concentration of sulfate radical of a pressurized water reactor nuclear power plant unit-loop. The method comprises the following steps of (1) clearing cation resin in a purification unit B of a spent fuel pool and boron box water purification system (3); (2) circulating according to an order of a boron water storage system (2), the spent fuel pool and boron box water purification system (3), the spent fuel pool (1) and the boron water storage system (2) after a nuclear power plant unit is shut down in a cold state; (3) restoring a mode of two cation beds and an anion bed of the spent fuel pool and boron box water purification system (3) to run when the concentration of the sulfate radical of a loop cooling agent is controlled below 500mug/L; and (4) stopping circulating when the concentration of the sulfate radical is greater than 500mug/L, clearing the cation resin in the purification unit C, and running in a mode of a single anion bed. An extra system facility does not need to be increased; the extra chemical agent does not need to be added to change the water quality; and the target of removing the sulfate radical can be achieved by adjusting the running mode of the purification system.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant operation, and in particular relates to a method for controlling sulfate radical concentration in a primary circuit of a pressurized water reactor nuclear power plant unit. Background technique [0002] The Tianwan Nuclear Power Plant in Jiangsu Province, China uses pressurized water reactor nuclear power plant units imported from Russia. During the overhaul period, the primary circuit coolant and the spent fuel pool of the two units of the Tianwan Nuclear Power Plant experienced an abnormal increase in sulfate radicals during the overhaul period, and the trend was year by year. The upward trend, from the highest concentration of 300 μg / L during the second overhaul of Unit 1, to the highest concentration of the two units during the third overhaul is close to 1500 μg / L. If the excessively high sulfate radicals are not removed in time, the fuel cladding and the primary circuit pipeline m...

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 Applications(China)
IPC IPC(8): G21C17/017G21F9/04
CPCY02E30/30
Inventor 李锋王宇宙刘非王旭初顾颖宾张毅张迅赵喜寰胡海
Owner JIANGSU NUCLEAR POWER CORP
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