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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).”
Roland England, W. L. Filippone
Nuclear Science and Engineering | Volume 83 | Number 4 | April 1983 | Pages 513-521
Technical Note | doi.org/10.13182/NSE83-A18657
Articles are hosted by Taylor and Francis Online.
Streaming ray (SR) computations normally employ a set of specially selected ray directions. For x-y geometry, these directions are not uniformly spaced in the azimuthal angle nor do they conform to any of the standard quadrature sets in current use. For simplicity in all previous SR computations uniform angular weights were used. This Note investigates two methods, a bisection scheme and a Fourier scheme, for selecting more appropriate azimuthal angular weights. In the bisection scheme the azimuthal weight assigned to an SR direction is half the angular spread (in the x-y plane) between its two adjacent ray directions. In the Fourier method, the weights are chosen such that the number of terms in a Fourier series exactly integrable on the interval (0,2π) is maximized. Several sample calculations have been performed. While both the Fourier and bisection weights showed significant advantage over the uniform weights used previously, the Fourier scheme appears to be the best method. Lists of bisection and Fourier weights are given for quadrature sets containing 4, 8, 12, …, 60 azimuthal SR directions.