TED-AJ03-532 MODELING CONVECTIVE HEAT TRANSFER AROUND A WASTE CASK STORED IN THE YUCCA MOUNTAIN REPOSITORY

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This paper discusses the development of a thermal model for heat transfer in the potential repository at Yucca Mountain, Nevada, USA. The model is based on separating the calculation of the emplacement drift from the surrounding mountain rock. When ventilation of the drift is considered, the heat generated by the waste package is removed from the drift by the ventilating air and conduction through the drift wall. The heat transfer path through the rock is of less importance than that through the ventilating air, allowing zero-heat flux boundary conditions to be applied on the drift wall. The finite-volume method is used to accomplish the numerical simulation; k-ε closure is used to model turbulence. Influences of such parameters as velocity of the ventilating air, thermal loading, and radiation heat transfer on the drift wall temperature are analyzed. It appears that radiation does not play an important role in increasing the drift wall temperature when ventilation is used
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