The primary objective of this work was to perform the thermal calculations to evaluate the Material Test Reactor (MTR) fuel assembly temperatures inside the SRS 70-Ton Cask loaded with various bundle powers. MTR fuel consists of HFBR, MURR, MIT, and NIST. The MURR fuel was used to develop a bounding case since it is the fuel with the highest heat load. The results will be provided for technical input for the SRS 70 Ton Cask Onsite Safety Assessment. The calculation results show that for the SRS 70 ton dry cask with 2750 watts total heat source with a maximum bundle heat of 670 watts and 9 bundles of MURR bounding fuel, the highest fuel assembly temperatures are below about 263°C. Maximum top surface temperature of the plastic cover is about 112°C, much lower than its melting temperature 260°C. For 12 bundles of MURR bounding fuel with 2750 watts total heat and a maximum fuel bundle of 482 watts, the highest fuel assembly temperatures are bounded by the 9 bundle case. The component temperatures of the cask were calculated by a three-dimensional computational fluid dynamics approach. The modeling calculations were performed by considering daily-averaged solar heat flux.

Volume Subject Area:
Operations, Applications, and Components
Keywords:
Shipping Cask, Computational Heat Transfer, Computational Fluid Dynamics, Thermal Performance
Topics:
Computational fluid dynamics, Electrical measurement, Fuels, Heat, Heat transfer, Manufacturing, Melting, Modeling, Modeling analysis, National Institute of Standards and Technology, Safety, Solar heating, Stress, Temperature
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 by ASME
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