Spent Fuel Repository Design Dr. Dave Carrington, Dr. Darrell Pepper, Dr. Yitung Chen
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-e 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 when ventilation is used, and
does not significantly increase the drift wall temperatures.