New Japanese correlations on core cooling and CCFL characteristics during BWR LOCA

SAFER02 is to calculate long term reactor vessel inventory and peak cladding temperature for BWR LOCA. SAFER02 has been already approved by USNRC as a licensing code applicable to the jet-pump BWR plants, BWR 3, 4, 5 and 6. Revised version of SAFER02, SAFER03, has been developed under the cooperative research among Toshiba, Hitachi and General Electric to be able to analyze the non jet-pump BWR plants, such as BWR 2 and advanced BWR. In this revised SAFER03, new Japanese experimental results on core cooling and CCFL characteristics have been utilized. Concerning core cooling characteristics, mist cooling model and new spray heat transfer coefficients have been incorporated. New CCFL correlations at top and bottom of bypass region have been also applied for SAFER03. This paper summarizes these new Japanese test results