Calibration of Instrumented Steam Separators to Determine Quality and Flow Distribution in an Operating Steam Generator. Final Report

摘要

Thermal and hydraulic computer codes have been developed to aid in performance evaluation of PWR steam generators. However, only limited experimental data are available to verify the accuracy of such codes. To supplement such verification, this study examines the feasibility of instrumenting steam separators on a Combustion Engineering (C-E) U-tube steam generator as two-phase flowmeters to measure the steam and water flow distributions approaching the separator deck plate. The prototypical C-E separators were instrumented and laboratory tested under prototypical steam generator conditions. The subsequent test data correlation shows that the steam separators can be calibrated for use as a two-phase flowmeter in operating steam generators. The accuracy of flow prediction was determined to be better than 9% in flow regimes of typical steam generators operating at 75 to 100% power. (ERA citation 08:017823)