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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).”
Harold E. Clark, Grover Tuck
Nuclear Technology | Volume 9 | Number 6 | December 1970 | Pages 814-820
Chemical Processing | doi.org/10.13182/NT70-A28713
Articles are hosted by Taylor and Francis Online.
An empirical formula has been developed for determining the individual diameter of essentially unreflected cylinders in a critical planar array. The formula is. The independent variables are N, the number of cylinders in the array; S, the edge-to-edge spacing between adjacent cylinders; H, the solution height in the array; C, the concentration of the solution [U ∼93 wt% 235U]; G, the geometry factor determined by the shape of the array; and ki (i = 1, 2, ... , 8), the constants determined by the type of solution, either uranyl nitrate or uranyl fluoride. These independent variables, the formula ranges, and approximations are discussed. The critical cylinder diameter, calculated by this formula, is within ±8% of the experimentally measured diameter for 112 experimental data points. Therefore, the formula can be used as a guideline for nuclear criticality safety.