Simulation of Darlington Loss-of-Flow Event

Abstract

In this paper, the validation of several physical models (pump rundown characteristics, stepback program, bleed condenser and pressurizer) using the single heat transport pump trip data from the Darlington NGS event on September 24, 1993 is briefly described. Emphasis is placed on the sensitivity study of important physical models rather than on a detailed description of code predictions. The predicted results show that the input data and the models implemented in the TUF code are appropriate for operational support analysis.