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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.
Masatoshi Kawashima, Tadashi Yoshida, Tsugio Yokoyama, Toshihisa Yamamoto
Nuclear Science and Engineering | Volume 103 | Number 2 | October 1989 | Pages 210-218
Technical Note | doi.org/10.13182/NSE89-A28508
Articles are hosted by Taylor and Francis Online.
Gamma-dose analysis was performed on an absolute-value basis at the zero-power plutonium reactor (ZPPR)-13B/4 critical assembly, which was one of the benchmark radially heterogeneous 650-MW(electric) liquid-metal reactor cores, to validate the current data and methods applicable to power reactor design calculations. Discussions of particular aspects inherent to the critical measurements, such as heterogeneity in the ZPPR plate cells and delayed fission product gamma effect, are included. The results showed that the gamma-energy deposition distribution was reproduced within an accuracy of ∼10% in cores that had complicated fuel and internal blanket layouts.