Method for inhibiting quadrantal power inclination of pressurized water reactor nuclear power station

A pressurized water reactor nuclear power plant, quadrant technology, applied in nuclear power generation, greenhouse gas reduction, factory parameter adjustment and other directions, can solve problems such as fuel assembly bending, uneven distribution of coolant flow, instrument deviation, etc. The effect of quadrant power inclination out of tolerance and ensuring safe operation

Inactive Publication Date: 2007-04-04
LINGDONG NUCLEAR POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reasons for quadrant power tilt out-of-tolerance are currently considered internationally to be caused by asymmetric water gaps, fuel consumption distribution, fuel assembly bending, uneven coolant flow distribution, instrument deviation, etc.

Method used

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Embodiment Construction

[0008] The invention provides a method for suppressing quadrant power inclination in a pressurized water reactor nuclear power plant. Aiming at the out-of-tolerance inherent quadrant power inclination of the reactor core, it proposes an idea to be considered in advance in the design of the loading scheme, and adopts the quadrant fuel consumption inclination to suppress Method of quadrant power tilting. The method used is as follows:

[0009] For the cores whose quadrant power tilt was out of tolerance in the previous cycle, in the design of the loading scheme, quadrant fuel consumption tilt should be considered to suppress the quadrant power tilt. The basic principles are as follows:

[0010] A. In the opposite quadrant where the quadrant power gradient has been out of tolerance, the quadrant fuel consumption gradient produces the maximum quadrant power, and the maximum value of the quadrant power ranges from 0.8% to 1.1%, of which 1% to 1.1% is should.

[0011] B. In fuel a...

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Abstract

The present invention relates to a method of inhibiting quadrantal power inclination of pressurized water reactor nuclear power station. During loading scheme design, the quadrantal power generated by the quadrantal burn-up inclination ever appeared in the generating set of pressurized water reactor nuclear power station is adjusted as the maximum value, within 0.8-1.1 %. The said method can avoid the excess of quadrantal power inclination, and ensure the safe running in full-power generation.

Description

【Technical field】 [0001] The invention relates to a method for suppressing quadrant power inclination of a pressurized water reactor nuclear power plant. 【Background technique】 [0002] In the daily operation of pressurized water reactor nuclear power plants, it is very important to suppress the quadrant power tilt. The so-called quadrant power tilt (Quadrant Power Tilt Ratio, QPTR) refers to the ratio between the four quadrant power of the reactor and its average value, and the QPTR tolerance is It means that in the normal operation of the reactor, the maximum value of QPTR measured by the ionization chamber outside the reactor exceeds the limit value. [0003] After the out-of-tolerance phenomenon of quadrant power tilt occurred, the unit could not be raised to full power, and the load needs to be reduced according to the technical specifications. The reason for quadrant power tilting out-of-tolerance is currently believed to be caused by asymmetrical water gap, fuel cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21D3/08
CPCY02E30/40Y02E30/00
Inventor 熊春华张洪
Owner LINGDONG NUCLEAR POWER
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