Proceedings of the Korean Nuclear Society Conference (한국원자력학회:학술대회논문집)
- 1998.05a
- /
- Pages.635-640
- /
- 1998
Thermal Fluid Mixing Behavior during Medium Break LOCA in Evaluation of Pressurized Thermal Shock
- Jung, Jae-Won (Korea Institute of nuclear Safety) ;
- Bang, Young-Seok (Korea Institute of nuclear Safety) ;
- Seul, Kwang-Won (Korea Institute of nuclear Safety) ;
- Kim, Hho-Jung (Korea Institute of nuclear Safety)
- Published : 1998.05.01
Abstract
Thermal fluid mixing behavior during a postulated medium-size hot leg break loss of coolant accident is analyzed for the international comparative assessment study on pressurized thermal shock (PTS-ICAS) proposed by OECD-NEA. The applicability of RELAP5 code to analyze thermal fluid mixing behavior is evaluated through a simple modeling relevant to the problem constraints. Based on the calculation result, the onset of Thermal stratification is investigated using Theofanous's empirical correlation. Sensitivity calculations using a fine node model and crossflow model are also performed to evaluate the modeling capability on multi-dimensional characteristics related to thermal fluid mixing.
Keywords