“…ORIGAMI, 16 a SCALE code that performs fast ORIGEN depletion calculations using pre-generated ORIGEN cross-section libraries, was used to calculate the photon and neutron sources in the fuel region and the 60 Co activation source in fuel assembly hardware regions and nonfuel hardware. These ORIGEN cross-section libraries, developed for the Used Nuclear Fuel-Storage, Transportation & Disposal Analysis Resource and Data Systems (UNF-ST&DARDS), 17,18 produce slightly conservative radiation source terms.…”