WRB-2 critical heat flux correlation analysis using KEPRI version of VIPRE-01 code

The purpose of this paper is to obtain the 95/95 Correlation limit Depature from Nucleate Boiling Ratio(DNBR) for WRB-2 Critical Heat Flux(CHF) correlation implemented in KEPRI HP-9000 version of VIPRE-01. The original anlaysis with THINC code was performed by Westinghouse and DNBR limit of 1.17 was applied to plant safety analysis. In 1999, Westinghouse performed the similar analysis with VIPRE-01 code and it was confirmed the current WRB-2 DNBR Limit of 1.17 was conservative. Therefore, this paper is focused on confirming WRB-2 correlation limit DNBR obtained by Westinghouse using KEPRI version of VIPRE-01. The WRB-2 CHF Correlation, implemented in KEPRI VIPRE-01 code, has been applied to 684 CHF data points defining a data base that represents 17x17 OFA and Vantage 5H fuel. The average and total standard deviation of measured-to-predicted CHF ratio are 1.000 and 0.079, respectively. A 95/95 Correlation limit DNBR of 1.17 which is identical with the THINC result is obtained by the statistical analysis