An algorithm and supporting database for rapid thermal repository loading calculation was implemented in Cyder. This algorithm employs a Specific Temperature Change (STC) method and has resulted from combining detailed spent nuclear fuel composition data with a detailed thermal repository performance analysis tool from Lawrence Livermore National Laboratory (LLNL), Argonne National Laboratory (ANL), and the Used Fuel Disposition (UFD) campaign. By abstraction of and benchmarking against these detailed thermal models, Cyder captures the dominant physics of thermal phenomena affecting repository capacity in various geologic media and as a function of spent fuel composition.
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