"TITLE","AUTHORS","SUBJECT","SUBJECT_RELATED","DESCRIPTION","PUBLISHER","AVAILABILITY","RESEARCH_ORG","SPONSORING_ORG","PUBLICATION_COUNTRY","PUBLICATION_DATE","CONTRIBUTING_ORGS","LANGUAGE","RESOURCE_TYPE","TYPE_QUALIFIER","JOURNAL_ISSUE","JOURNAL_VOLUME","RELATION","COVERAGE","FORMAT","IDENTIFIER","REPORT_NUMBER","DOE_CONTRACT_NUMBER","OTHER_IDENTIFIER","DOI","RIGHTS","ENTRY_DATE","OSTI_IDENTIFIER","PURL_URL" "Study of two-phase flow under low velocity in PWR-LOCA","Ohnuki, Akira [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment]","22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; PWR TYPE REACTORS; REACTOR SAFETY; LOSS OF COOLANT; TWO-PHASE FLOW; VELOCITY; ACCURACY; FLOW MODELS; COMPUTER CODES; POWER DISTRIBUTION; FUEL ASSEMBLIES; HEAT TRANSFER; SCALE MODELS; VOID FRACTION; COUNTER CURRENT; FILM BOILING; FUEL RODS; FUEL CANS; FORECASTING; 220900; 210200; POWER REACTORS, NONBREEDING, LIGHT-WATER MODERATED, NONBOILING WATER COOLED","","In this research, when the hydrothermal behavior at the time of LOCA in PWRs is forecast with high accuracy by the optimal forecast code based on a two-fluid model, there are some problems in the accuracy of forecast of low velocity two-phase flow, therefore, the subjects related to it were studied. The subjects are the forecast using the multi-dimensional optimal forecast code of the heat transfer acceleration phenomena in high power output fuel assemblies originating in the radial power distribution in a core in the reflooding period at the time of LOCA, the evaluation of the applicability of the hydrothermal model in a core in reflooding period which was developed for 15 x 15 type fuel assemblies to 17 x 17 type fuel assemblies, the grasping of the mechanism of opposite flow limiting phenomena in hot leg, the elucidation of the scale effect of channels and the development of a model which is applicable up to actual reactor scale. The studies carried out on these subjects and the conclusions of respective studies are reported. (K.I.) 79 refs.","","OSTI; NTIS; INIS","Japan Atomic Energy Research Inst., Tokyo (Japan)","","Japan","1992-10-01","","Japanese","Technical Report","","","","Other Information: PBD: Oct 1992","","Medium: X; Size: 146 p.","ON: DE93754367","JAERI-M-92-150","","Other: ON: DE93754367; TRN: JP9212232","https://doi.org/","","2008-02-12","10112643",""