HFIR HEU to LEU Conversion: Reactor Physics Analyses

10:00 AM - 11:00 AM
Germina Ilas, Division Staff
Reactor and Nuclear Systems Division Seminar
Building 4500-N, Weinberg Auditorium
Email: Julie Stringfield

An engineering study is ongoing at ORNL to design a fuel that would enable the conversion of the High Flux Isotope Reactor (HFIR) from high-enriched uranium (HEU) to low-enriched uranium (LEU) fuel, as part of an effort sponsored by the Department of Energy’s National Nuclear Security Administration through the Reduced Enrichment for Research and Test Reactors Program. Given the unique fuel, particular core design, and high power density of HFIR, and the requirement that the impact of the fuel change on the core performance and operation be minimal, this conversion study represents a complex and challenging task. Such a task requires improvements in and extensions of the computational methodologies and tools that are currently used to support the operation of the reactor. The presentation will mainly discuss the computational models used to perform reactor physics analyses and the challenges involved, with a focus on core depletion simulations.


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