Abstract

The radial streaming of neutrons from H 20 moderator assemblies pierced by a uniform array of cylindrical voids is investigated by the pulsed neutron source technique. A method of synthesis is developed by which the fundamental mode in the spatial distribution of the thermal neutron flux within a moderator assembly may be readily extracted from experimental data. The decay constants determined by the synthesis method were used to derive the magnitude of the radial diffusion constant D r v. The value of D r v agrees with that predicted by the theory of Leslie.

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