Best-Estimate LOCA Analysis over the Full Spectrum of Postulated Breaks Using Westinghouse FULL SPECTRUMTM LOCA Methodology
NURETH-14 - 2011 September 25-30


Presented at:
NURETH-14
2011 September 25-30
Location:
Toronto, Canada
Session Title:
O11-1 Westinghouse Full Spectrum LOCA – A Realistic LOCA Evaluation Model Applicable to the Full Ran

Authors:
Michael Shockling (Westinghouse Electric Company)
Cesare Frepoli (Westinghouse Electric Company)
Katsuhiro Ohkawa (Westinghouse Electric Company)
  

Abstract



In this paper, the ability of the Westinghouse FULL SPECTRUMTM LOCA (FSLOCATM) best-estimate code to adequately capture the phenomena most important and dominant for small, intermediate, and large breaks of the cold leg is demonstrated for a three-loop Westinghouse pressurized water reactor (PWR).  Nominal scenarios, in which typical values are assumed for uncertainty parameters, illustrate the influence of break size on the important system-level phenomena predicted by the code.  The relatively more limiting predictions of peak cladding temperature for larger breaks confirm the analysis margin achieved for small breaks by analyzing in a best-estimate manner.

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