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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.
Kojiro Nishina and Yoshihiro Yamane
Nuclear Science and Engineering | Volume 89 | Number 1 | January 1985 | Pages 102-108
Technical Note | doi.org/10.13182/NSE85-A17888
Articles are hosted by Taylor and Francis Online.
A two-group, one-dimensional formulation of a coupled-core system is proposed as a revision of the one-group response function method by Shinkawa et al. The coupling coefficient of the Kyoto University Critical Assembly symmetric coupled-core loading is revised. In such a light-water-coupled system, the fast-to-fast coupling, Δ11 proves the greatest, the fast-to-thermal, Δ12, the second, and the thermal-to-thermal, Δ22, the smallest component within the quantity; at the core distance of 10 cm, Δ12 = 0.68Δ11 and Δ22 = 0.028Δ11. Beyond 20 cm, both Δ11 and Δ12 decrease approximately by the fast-neutron relaxation length of water. The effectiveness of the incoming neutrons is considerably dependent on the thickness of the core that receives them.