Experiment and model development of CHF with consideration of heater surface characteristics and fluid properties = 가열면과 유체의 특성 효과 반영 임계열유속 실험 및 역학적 모델 개발

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Downward-facing geometries have been considered in this study, and major parameters to be considered during severe accident progression have been included in the experiments performed: pressure, material, orientation, dimension and coolant. Multifactor effects were mainly observed. A heat transfer model has been developed as well to incorporate the physical behaviors observed. Especially, material, wettability and pressure effects have been considered. Dry patch formation and phenomena have been considered in the model, and a material effect term has been included to account for a heat dissipation under a dry patch. Data comparisons were done with the CHF data where wettability, pressure and orientation information were included. Pressure condition considered was up to 10 bar, and the orientations were from $15^\circ$ up to vertical positions. The predictability tended to be improved as the width scale increased, which may suggest potential applicability to large-scale facilities. Some parts of the experimental results were analyzed with the developed model.
Advisors
Jeong, Yong Hoonresearcher정용훈researcher
Description
한국과학기술원 :원자력및양자공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 원자력및양자공학과, 2019.2,[ix, 144 p. :]

Keywords

Severe accident▼adownward-facing Geometry▼aCHF▼acombined effect▼aheat transfer model; 중대사고▼a하향가열면▼a임계열유속▼a복합효과▼a열전달 모델

URI
http://hdl.handle.net/10203/265064
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=842171&flag=dissertation
Appears in Collection
NE-Theses_Ph.D.(박사논문)
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