(A) simplified computational scheme for thermal analysis of LWR spent fuel dry storage and transportation casks = 사용후 핵연료 건식 저장 및 수송 용기 열해석을 위한 단순화된 계산 기법

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A simplified computational scheme for thermal analysis of the LWR spent fuel dry storage and transportation casks has been developed using two-step thermal analysis method incorporating effective thermal conductivity model for the homogenized spent fuel assembly. Although a lot of computer codes and analytical models have been developed for application to the fields of thermal analysis of dry storage and/or transportation casks, some difficulties in its analysis arise from the complexity of the geometry including the rod bundles of spent fuel and the heat transfer phenomena in the cavity of cask. Particularly, if the disk-type structures such as fuel baskets and aluminium heat transfer fins are included, the thermal analysis problems in the cavity are very complex. To overcome these difficulties, cylindrical coordinate system is adopted to calculate the temperature profile of a cylindrical cask body using the multiple cylinder model as the step-1 analysis of the present study. In the step-2 analysis, Cartesian coordinate system is adopted to calculate the temperature distributions of the disk-type structures such as fuel basket and aluminium heat transfer fin using three- dimensional conduction analysis model. The effective thermal conductivity for homogenized spent fuel assembly based on Manteufel and Todreas model is incorporated in step-2 analysis to predict the maximum fuel temperature. The presented two-step computational scheme has been performed using an existing HEATING 7.2 code and the effective thermal conductivity for the homogenized spent fuel assembly has been calculated by additional numerical analyses. Sample analyses of five cases are performed for NAC-STC including normal transportation condition to examine the applicability of the presented simplified computational scheme for thermal analysis of the large LWR spent fuel dry storage and transportation casks and heat transfer characteristics in the cavity of the cask with the disk-type struct...
Advisors
Chun, Moon-Hyun전문헌
Description
한국과학기술원 : 원자력공학과,
Publisher
한국과학기술원
Issue Date
1997
Identifier
114535/325007 / 000933136
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력공학과, 1997.2, [ vi, 69 p. ]

Keywords

Spent fuel; Thermal analysis; Dry storage and transportaion cask; 건식저장 및 수송 용기; 사용후 핵연료; 열해석

URI
http://hdl.handle.net/10203/49363
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=114535&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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