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DOE OKs $1.5B loan for “restoration and maintenance” at Palisades
The Department of Energy has signed off on a $1.5 billion loan guarantee to Holtec Palisades LLC to support initial work needed to restart the Michigan nuclear plant.
T. S. Haut, P. G. Maginot, V. Z. Tomov, B. S. Southworth, T. A. Brunner, T. S. Bailey
Nuclear Science and Engineering | Volume 193 | Number 7 | July 2019 | Pages 746-759
Technical Paper | doi.org/10.1080/00295639.2018.1562778
Articles are hosted by Taylor and Francis Online.
We propose a graph-based sweep algorithm for solving the steady-state, monoenergetic discrete ordinates on meshes of high-order (HO) curved mesh elements. Our spatial discretization consists of arbitrarily HO discontinuous Galerkin finite elements using upwinding at mesh element faces. To determine mesh element sweep ordering, we define a directed, weighted graph whose vertices correspond to mesh elements and whose edges correspond to mesh element upwind dependencies. This graph is made acyclic by removing select edges in a way that approximately minimizes the sum of removed edge weights. Once the set of removed edges is determined, transport sweeps are performed by lagging the upwind dependency associated with the removed edges. The proposed algorithm is tested on several two-dimensional and three-dimensional meshes composed of HO curved mesh elements.