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in creator/contributor: "Schaefer, R. W."

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Fissile sample worths in the Uranium/Iron Benchmark

One of the long-standing problems from LMFBR critical experiments is the central worth discrepancy, the consistent overprediction of the reactivity associated with introducing a small material sample near the center of an assembly. Reactivity (sample worth) experiments in ZPR-9, assembly 34, the Uranium/Iron Benchmark (U/Fe), were aimed at investigating this discrepancy. U/Fe had a large, single-region core whose neutronics was governed almost entirely by /sup 235/U and iron. The essentially on… more

Date: January 1, 1983

Creator: Schaefer, R. W. & Bucher, R. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fixed-source perturbation worth calculations

Material worth measurements are routinely performed in fast reactor critical programs. Until recently, such measurements were usually made by inserting cylindrical samples via stainless steel tubes. Such measurements pose difficult problems for the analyst since the geometry is very complicated. An alternative measurement utilizes a drawer oscillator to remove or insert a fuel plate. In such a measurement, samples are large enough to cause significant distortions of the local flux. Consequently… more

Date: January 1, 1984

Creator: Smith, K. S. & Schaefer, R. W.