Application of ultrasonic techniques in feedwater flow measurement of nuclear power plant

WANG Xu， ZHANG He-nan
（Shanghai Nuclear Engineering Research and Design Institute， Shanghai 200233， China）

Abstract： In order to solve the problems of differential pressure flow meter used in feedwater flow measurement，the ultrasonic flow meter to measure feedwater flow was investigated. After the analysis of the relation between reactor core thermal power calculation uncertainty and feedwater flow measurement accuracy，the successful experience of measurement uncertainty recapture power uprates（MUR） projects was studied. The feasibility，potential profit and risk of using ultrasonic flow meter and performing MUR project in AP1000 nuclear power plant （NPP）were evaluated. The analysis results indicate that the MUR project in AP1000 NPP is feasible based on the feedwater ultrasonic flow meter，and the safety，operation performance of the plant will be improved.
Key words： nuclear power plant（NPP）； feedwater flow measurement； differential pressure flow meter； ultrasonic techniques； measurement uncertainty recapture power uprates（MUR）