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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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No impact from Savannah River radioactive wasps
The news is abuzz with recent news stories about four radioactive wasp nests found at the Department of Energy’s Savannah River Site in South Carolina. The site has been undergoing cleanup operations since the 1990s related to the production of plutonium and tritium for defense purposes during the Cold War. Cleanup activities are expected to continue into the 2060s.
H. Finnemann, J. Volkert
Nuclear Science and Engineering | Volume 100 | Number 3 | November 1988 | Pages 226-236
Technical Paper | doi.org/10.13182/NSE88-A29035
Articles are hosted by Taylor and Francis Online.
The numerical solution of partial differential equations for the simulation of physical phenomena on memory-coupled multiprocessor systems is discussed. The multigrid methods used are well suited for the considered systems, which are based on the distributed reconfigurable multiprocessor kit DIRMU. The implementation of a multilevel nodal diffusion method on special ring configurations built with DIRMU is outlined. The particular iteration scheme employed in the nodal expansion method appears similarly effective in parallel and serial environments. A general approach for mapping multigrid algorithms onto nearest neighbor mesh configurations, called EGPA, is presented and communication mechanisms are explained. Measured speedups for Poisson's equation and the more complicated steady-state Stokes equation are given. For large problems, the speedup is roughly proportional to the number of processors.