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http://dx.doi.org/10.1016/j.net.2017.07.008

Neutron clustering in Monte Carlo iterated-source calculations  

Sutton, Thomas M. (Naval Nuclear Laboratory-Knolls Atomic Power Laboratory, Bechtel Marine Propulsion Corporation)
Mittal, Anudha (Naval Nuclear Laboratory-Knolls Atomic Power Laboratory, Bechtel Marine Propulsion Corporation)
Publication Information
Nuclear Engineering and Technology / v.49, no.6, 2017 , pp. 1211-1218 More about this Journal
Abstract
Monte Carlo neutron transport codes generally use the method of successive generations to converge the fission source distribution to-and then maintain it at-the fundamental mode. Recently, a phenomenon called "clustering" has been noted, which produces fission distributions that are very far from the fundamental mode. In this study, a mathematical model of clustering in Monte Carlo has been developed. The model draws on previous work for continuous-time birth-death processes, as well as methods from the field of population genetics.
Keywords
Clustering; Iterated Fission Source; Monte Carlo;
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