Evaluation of Temperature-Measurement Systematic Errors in PHTS of Embalse NGS

Abstract

Systematic errors of temperature measurement of inlet header and fuel channel outlet feeders of PHTS were evaluated in this paper. These errors are needed for thermal power maps calculations from thermal measurements. A linear dependence between the outlet temperature systematic errors and channel outlet temperature was found. The average systematic error at full power was -4 degrees C and -0.6 degrees C at zero power hot condition. No systematic errors were found in inlet temperature measurements. A correction of temperature measurement of single outlet feeders were made based on the dependence of the average outlet temperature systematic errors.