1963•Unpublished venueOpen access
SPECTRAL SHIFT CONTROL REACTOR BASIC PHYSICS PROGRAM. MEASUREMENT AND ANALYSIS OF PERTURBED LATTICES OF SLIGHTLY ENRICHED UO$sub 2$ MODERATED BY D$sub 2$O-H$sub 2$O MIXTURES
Theodore C. Engelder, Ronald H. Clark, E.J. DeRoche, G. T. Fairburn, J.W. Hallam, D.R. Hostetler, C.B. Woodhall
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Abstract
Critical experiments and theoretical calculations of reactivity and flux perturbations were performed. Three major critical assemblies were studied; the basic cores had 1.206-cm diameter, aluminum clad, 2.46%-enriched UO/sub 2/ fuel rods on a square lattice pitch of 1.511 cm. Moderator compositions for the three major cores had 0, 50, and 72 mole% D/sub 2/O. Bonic acid was added to keep the core radius constant at 61.11 cm. Data on a zone-loaded core with an inner zone of 93%-enriched aluminum clad UO/sub 2/-ThO/sub 2/ fuel rods surrounded by an outer zone of 4%-enriched stainless steel clad UO/sub 2/ fuel rods are also included. The moderator composition was 81% D/sub 2/O. Perturbers were introduced axially by removing fuel pins to create moderator gaps and by inserting perturbing blades and cruciform rods. The blades were 10 inches wide. The cruciplease delete the above abstract=====
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