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[en] Betsy Test 6.9c OECD ISP-38 RELAP5/MOD3.2 input model was developed and simulation performed for loss of RHR system during mid-loop operation. Initial liquid level in RCS was at horizontal axis of the hot legs. Pressurizer and steam generator manways were opened 1 s after the transient was initiated. Secondary side is full of air and isolated. Results of calculations were satisfied except in surge line and in pressurizer where larger amount of water is presented. Liquid was entrained in that part of the system during bubbly or varies stratified flow in the hot leg. Due to non-physical results in hot leg pipe with connected surge line and pressurizer, RELAP5 horizontal stratification model deficiencies was studied and possible improvements investigated.(author)
Source
Ravnik, M.; Jencic, I.; Zagar, T. (Nuclear Society of Slovenia, Ljubljana (Slovenia)) (eds.); Nuclear Society of Slovenia, Ljubljana (Slovenia). Funding organisation: European Nuclear Society (Switzerland); Nuclear Power Plant Krsko (Slovenia); Siemens Power Generation Group, Erlangen (Germany); Ministry of Science and Technology of Slovenia, Ljubljana (Slovenia); Institute Jozef Stefan (Slovenia); American Society of Mechanical Engineers (United States); ENCONET Consulting GmbH (Austria); SIAP d.o.o. Pesnica pri Mariboru (Slovenia); Institute for Metal Constructions (Slovenia); Agency for Radwaste management (Slovenia); Slovenian Nuclear Safety Administration (Slovenia); 519 p; ISBN 961-6027-10-5; 
; 1998; p. 219-226; Nuclear Society of Slovenia; Ljubljana (Slovenia); Nuclear Energy in Central Europe 98; Terme Catez (Slovenia); 7-10 Sep 1998; Available from Nuclear Society of Slovenia, Jozef Stefan Institute, Jamova 39, Ljubljana (SI); 9 refs., 2 tabs., 14 figs.
; 1998; p. 219-226; Nuclear Society of Slovenia; Ljubljana (Slovenia); Nuclear Energy in Central Europe 98; Terme Catez (Slovenia); 7-10 Sep 1998; Available from Nuclear Society of Slovenia, Jozef Stefan Institute, Jamova 39, Ljubljana (SI); 9 refs., 2 tabs., 14 figs.