WHF and RF Thermal Evaluation

The purpose of this analysis is to estimate the peak fuel assembly cladding temperature within the transportation casks that will be received in the WHF and RF, and to compare this value with established temperature limits. Thermally limiting scenarios are evaluated for both normal and off-normal operating conditions, with the off-normal condition defined as a loss of active ventilation. A second purpose of this analysis is to identify a specific room in the surface facilities as thermally limiting of all the rooms, with respect to the potentially highest temperatures on the concrete walls. The thermal response of the walls due to radiative heat transfer from the casks inside is judged based on the interior geometry of each room. The rooms are compared on the basis of their dimensions, as well as the distance of the walls to standard positioning of casks inside. The aging overpack is not included in this analysis, as it has not yet been designed. According to the current mechanical equipment envelope for the aging overpack design (Ref. 2.2.16), it will be designed with vent openings, aiding in ventilation heat dissipation. The shielded transfer casks and the shield bell of the canister transfer machine are not included in this analysis, as they have not yet been designed.