Title: Clean critical experiment benchmarks for plutonium recycle in LWR's (foil activation studies). Final report
Abstract: Foil activation measurements were made in twelve critical configurations. Six configurations utilized rods containing UO/sub 2/-2.35 percent /sup 235/U and six configurations utilized rods containing UO/sub 2/-2 wt percent PuO/sub 2/. Three lattice pitches were used with each fuel type to obtain fuel to moderator ratios of about 1.2 (under-moderated), about 2.5 (near-optimum), and about 3.7 (over-moderated). Measurements were made in each lattice pitch with the moderator borated and unborated. The average values of delta/sup 28/ in the interior of the unborated UO/sub 2/-2.35 percent /sup 235/U assemblies were: delta/sup 28/ (M/F = 1.196) = 0.0755 +- 0.0055 and delta/sup 28/ (M/F = 3.687) = 0.0341 +- 0.0028. The average values for rho/sup 28/ in the same assemblies were: rho/sup 28/ (M/F = 1.196) = 2.227 +- 0.175 and rho/sup 28/ (M/F = 3.687) = 1.355 +- 0.117. Data are presented from which cell disadvantage factors can be derived for all twelve critical configurations.