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

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...

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.