Author:
Zhou Fanfan,Zhang Hao,Chen Lin,Yang Yanhua
Abstract
Abstract
This study adopts a two-fluid three-field model instead of a traditional CCFL model to study hydraulic behavior in downcomers during a refilling stage. UPTF Test 6, a cold leg injection experiment, is simulated by the subchannel program cosSUBC. Results show that the flow field distribution in the downcomer is non-uniform. Coarser node divisions cannot simulate the actual flow field in the downcomer. The effectiveness of the interphase friction model in cosSUBC is verified by comparing simulated and experimental results. Compared with the simulation results of the CCFL model, cosSUBC has a smaller error and can predict the CCFL phenomenon in downcomers more accurately.
Reference13 articles.
1. Downcomer and tie plate counter current flow in the Upper Plenum Test Facility (UPTF) [J];Glaeser;Nuclear Engineering and Design,1992
2. Modeling of reflooding [J];Yadigaroglu;Nuclear Engineering and Design,1993
3. RELAP5/MOD3 code manual: Summaries and reviews of independent code assessment reports. Volume 7, Revision 1 [R];Moore,1996
4. Applicability analysis of CCFL model for thermal hydraulic system program RELAP 5 [J];Dong;Journal of Shanghai Electric Power University,2021