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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.
T. M. Sutton
Nuclear Science and Engineering | Volume 98 | Number 2 | February 1988 | Pages 169-173
Technical Paper | doi.org/10.13182/NSE88-1
Articles are hosted by Taylor and Francis Online.
An implementation of Wielandt’s method of eigenvalue shifting to accelerate the convergence of nodal expansion method (NEM) reactor calculations is presented. This particular formulation of the method greatly decreases the number of source iterations required for a particular degree of convergence while retaining most of the efficiency of a groupwise solution procedure for the inner iterations. The nature of the NEM equations causes Wielandt’s method to behave somewhat differently than when it is applied to the finite difference equations. Results are presented for well-known two- and three-dimensional benchmark problems.