Design of A scale-down experimental model for SFR reactor vault cooling system performance analysesopen access
- Authors
- Kim K.M.; Hwang J.-H.; Wongwises S.; Jerng D.-W.; Ahn H.S.
- Issue Date
- Aug-2020
- Publisher
- Korean Nuclear Society
- Keywords
- Asymmetric heating; Natural convection; RVCS; Scaling analysis; Vertical parallel plate
- Citation
- Nuclear Engineering and Technology, v.52, no.8, pp 1611 - 1625
- Pages
- 15
- Journal Title
- Nuclear Engineering and Technology
- Volume
- 52
- Number
- 8
- Start Page
- 1611
- End Page
- 1625
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/37921
- DOI
- 10.1016/j.net.2020.01.005
- ISSN
- 1738-5733
- Abstract
- We propose a scaled-down experimental model of vertical air-natural convection channels by applying the modified Ishii–Kataoka scaling method with the assistance of numerical analyses to the Reactor Vault Cooling System (RVCS) of the Proto-type Gen-IV Sodium-cooled fast reactor (PGSFR) being developed in Korea. Two major non-dimensional numbers (modified Richardson and Friction number) from the momentum equation and Stanton number from the energy balance equation were identified to design the scaled-down experimental model to assimilate thermal-hydraulic behaviors of the natural convective air-cooling channel of RVCS. The ratios of the design parameters in the PGSFR RVCS between the prototype and the scaled-down model were determined by setting Richardson and Stanton number to be unity. The friction number which cannot be determined by the Ishii-Kataoka method was estimated by numerical analyses using the MARS-KS system code. The numerical analyses showed that the friction number with the form loss coefficient of 2.0 in the scale-down model would result in an acceptable prediction of the thermal-hydraulic behavior in RVCS. We also performed experimental benchmarking using the scaled-down model with the MARS-KS simulations to verify the appropriateness of the scale-down model, which demonstrated that the temperature rises and the average air flow velocity measured in the scale-down model. © 2020 Korean Nuclear Society
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