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UNF-ST&DARDS

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The Used Nuclear Fuel-Storage, Transportation & Disposal Analysis Resource and Data System (UNF-ST&DARDS) is a comprehensive integrated data and analysis tool being developed for the US Department of Energy (DOE) Office of Nuclear Energy (NE) Spent Fuel and Waste Disposition (SFWD) program, with growing support from the NRC. The overarching goal of UNF-ST&DARDS is to provide a comprehensive, controlled source of technical data integrated with key analysis capabilities to characterize inputs to the overall US waste management system, beginning with reactor power production through ultimate disposition. UNF-ST&DARDS seamlessly integrates a unified spent fuel system relational database and key analysis capabilities to simplify and automate performance of accurate, efficient spent fuel analyses to support numerous DOE waste management and fuel cycle activities. UNF-ST&DARDS enables decision making relative to design, safety, and licensing of spent fuel systems and facilities by providing the best information available. Automated analysis sequences have been deployed to characterize the discharge inventory and to perform criticality, thermal, and dose analyses using time-dependent data. UNF ST&DARDS provides cask-specific as-loaded safety analysis, including criticality, thermal and dose evaluations, and results visualization by integrating capabilities from SCALE and COBRA – Spent Fuel Storage (SFS), jointly developed with Pacific Northwest National Laboratory. UNF-ST&DARDS provides simple interfaces for incorporating user-specific data into the UNF-ST&DARDS database, allowing users to perform automated, user-specific spent fuel characterizations. Additionally, UNF-ST&DARDS provides automated design-basis analysis capabilities for spent nuclear fuel storage and transportation systems.

https://www.ornl.gov/division/rnsd/projects/spent-nuclear-fuel-characterization