Validation of Post-Dryout Phenomena for the Space Code
NURETH-14 - 2011 September 25-30


Presented at:
NURETH-14
2011 September 25-30
Location:
Toronto, Canada
Session Title:
B4-1 Plant System Safety Code Development and Assessment

Authors:
Kyung Doo Kim (Korea Atomic Energy Research Institute)
S. K. Moon (Korea Atomic Energy Research Institute)
B. D. Chung (Korea Atomic Energy Research Institute)
B. J. Kim (Korea Atomic Energy Research Institute)
S. W. Lee (Korea Atomic Energy Research Institute)
  

Abstract

SPACE code which is based on a multi-dimensional two-fluid, three-field model is under development for the licensing calculation of pressurized water reactors. Unlike other major best-estimate nuclear reactor system analysis codes that have been developed based on a two-fluid six equation model, the field equations of SPACE code incorporates a dispersed liquid field in addition to vapor and continuous liquid fields. This model features a set of nine equations of mass, energy and momentum conservation. A dispersed liquid field is expected to be important in annular-mist and post-dryout conditions since a dispersed liquid field behaves differently with a continuous liquid field. This is the major reason to incorporate a dispersed liquid field as an additional liquid field. As a part of the validation effort of SPACE code, FLECHT-SEASET reflood problems have been assessed and are presented in this paper.

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