Abstract
In the operating nuclear power plant, piping and components installed in the in-service testing (IST) systems connected to the reactor coolant system are potentially exposed to fatigue caused by thermal stratification flow, possibly threatening its integrity. The emergency core cooling system (ECCS) is one of candidates for which the thermal stratification phenomenon can occur. During the ECCS operating period, buoyancy due to density difference may have significant influence on thermal-hydraulic characteristics of the mixing flow. Therefore, in this study, the need to consider proper buoyancy models in governing equations, especially turbulent transport equations, for accurate prediction of single phase thermal stratification by ECCS injection was numerically studied using ANSYS CFX R17.2.
Reference9 articles.
1. Lee G.H.,
Bae J.H.,
15th Asian International Conference on Fluid Machinery, AICFM15-091
(2019)
2. Scheuerer M.,
Weis J.,
Nuclear Eng. & Design
253,
(2012)
3. Cai J.,
Watanabe T.,
Prog. Nuclear Science & Tech.
2,
(2011)
4. Farkas T.,
Toth I.,
Nuclear Eng. & Design
240,
(2010)
5. Japan Atomic Energy Agency,
Final Data Report of OECD/NEA ROSA Project Test 1-1,
(2008)