Thermal stratification phenomena occurring in the upper plenum during a scram transient have an important influence on the structural integrity and the passive safety of sodium-cooled fast breeder reactor (SFR). A two-dimensional thermal-hydraulic analysis code was developed under cylindrical coordinate based on conservation laws of mass, momentum and energy. Block-structured grids were generated to resolve the problems with complicated geometric properties. A second-order scheme based on midpoint rule was applied for the discretization of convection and diffusion terms. Two RANS-type turbulent models, i.e. the standard k–ε model (SKE) and the realizable k–ε model (RKE), are available in this code. A sodium test with scaled model, characterized by large aspect ratio, of a Japanese prototype SFR was used for the validation, mainly from the viewpoints of vertical temperature profiles and rising characteristics of the stratification interface. Results showed that this code could reproduce overall basic behaviors of thermal stratification. The sodium with higher temperature stayed largely stagnant in the upper region under buoyancy effect. Due to the high heat conductivity of sodium, momentum transportation made its leading function. Thus, the RKE model which accounts for the mean deformation rate gave better outcomes than the SKE model.
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2018 26th International Conference on Nuclear Engineering
July 22–26, 2018
London, England
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5153-1
PROCEEDINGS PAPER
Validation of a Code and Effect of Turbulence Model on Predicting Thermal Stratification Phenomena in the Upper Plenum of SFR
Shibao Wang,
Shibao Wang
Xi'an Jiaotong University, Xi'an, China
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Dalin Zhang,
Dalin Zhang
Xi'an Jiaotong University, Xi'an, China
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Chenglong Wang,
Chenglong Wang
Xi'an Jiaotong University, Xi'an, China
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Ping Song,
Ping Song
Xi'an Jiaotong University, Xi'an, China
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Jing Chen,
Jing Chen
Xi'an Jiaotong University, Xi'an, China
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Suizheng Qiu,
Suizheng Qiu
Xi'an Jiaotong University, Xi'an, China
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Guanghui Su
Guanghui Su
Xi'an Jiaotong University, Xi'an, China
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Shibao Wang
Xi'an Jiaotong University, Xi'an, China
Dalin Zhang
Xi'an Jiaotong University, Xi'an, China
Chenglong Wang
Xi'an Jiaotong University, Xi'an, China
Ping Song
Xi'an Jiaotong University, Xi'an, China
Jing Chen
Xi'an Jiaotong University, Xi'an, China
Suizheng Qiu
Xi'an Jiaotong University, Xi'an, China
Guanghui Su
Xi'an Jiaotong University, Xi'an, China
Paper No:
ICONE26-81551, V009T16A035; 7 pages
Published Online:
October 24, 2018
Citation
Wang, S, Zhang, D, Wang, C, Song, P, Chen, J, Qiu, S, & Su, G. "Validation of a Code and Effect of Turbulence Model on Predicting Thermal Stratification Phenomena in the Upper Plenum of SFR." Proceedings of the 2018 26th International Conference on Nuclear Engineering. Volume 9: Student Paper Competition. London, England. July 22–26, 2018. V009T16A035. ASME. https://doi.org/10.1115/ICONE26-81551
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