TY - RPRT TI - Parameter Optimization of FREYA for 240Pu(sf) AU - Vogt, Ramona [Lawrence Livermore National Laboratory] AU - Tuckey, Alex [University of Michigan] AU - Clarke, Shaun [University of Michigan] AU - Pozzi, Sara [University of Michigan] AU - Giha, Nathan [IJC Lab, Orsay, France] PY - 2026 DO - 10.2172/3389041 UR - https://www.osti.gov/biblio/3389041 ID - 3389041 ER -