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Conference Spotlight
2025 ANS Winter Conference & Expo
November 8–12, 2025
Washington, DC|Washington Hilton
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Latest News
Bipartisan commission report urges national fusion strategy
In the report Fusion Forward: Powering America’s Future issued earlier this month by the Special Competitive Studies Project’s (SCSP) Commission on the Scaling of Fusion Energy, it warns that the United States is on the verge of losing the fusion power race to China.
Noting that China has invested at least $6.5 billion in its fusion enterprise since 2023, almost three times the funding received by the U.S. Department of Energy’s fusion program over the same period, the commission report urges the U.S. government to prioritize the rapid commercialization of fusion energy to secure U.S. national security and restore American energy leadership.
Rodolfo M. Ferrer, HyeongKae Park
Nuclear Science and Engineering | Volume 196 | Number 6 | June 2022 | Pages 637-650
Technical Paper | doi.org/10.1080/00295639.2021.2011668
Articles are hosted by Taylor and Francis Online.
The recently developed High-Order, Low-Order scheme for the solution of thermal radiative transfer problems is applied as an acceleration method to the neutral particle transport equation. The resulting Corner Balance Nonlinear Diffusion Acceleration (CB-NDA) is derived, and a stability analysis is performed in conjunction with moment-based, spatially linear discretizations. These spatial discretizations correspond to the lumped Linear Discontinuous (LD) and Linear Characteristic (LC) schemes, which possess the thick diffusion limit. The lumped LD and LC schemes satisfy corner balance equations, which in turn are used to derive the CB-NDA. Two variants of the CB-NDA include the net current and partial current formulations. Numerical results are presented that verify the theoretical predictions and implementation. Theoretical spectral radius from the analysis is verified by comparison to values from the numerical solution of a one-dimensional transport problem. Results indicate similar stability between the CB-NDA–accelerated lumped LD and LC schemes. The net current–based CB-NDA is found to be unstable whereas the partial current formulation remains stable over the range of scattering ratios and optical thicknesses.