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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
P. S. W. Chan, A. R. Dastur
Nuclear Science and Engineering | Volume 103 | Number 3 | November 1989 | Pages 283-288
Technical Paper | doi.org/10.13182/NSE89-A23679
Articles are hosted by Taylor and Francis Online.
The components of the void reactivity effect in the RBMK lattice are obtained using multigroup multidimensional lattice codes. The relative magnitudes of the reactivity change due to changes, on voiding, in neutron absorption and in neutron moderation are compared for several lattice configurations that include either absorber rods or followers of various materials. This has led to the identification of the mechanism that makes the void coefficient dependent on the number of absorber rods in the core. In line with these results, it is shown that replacing the graphite in the follower with nonmoderating materials reduces the void coefficient dependence on the number of absorber rods and is an economic method that may have potential in the void coefficient reduction program.