Adequacy of the 123-group cross-section library for criticality analyses of water-moderated uranium systems [electronic resource].
- Rockville, Md. : U.S. Nuclear Regulatory Commission, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 19 pages : digital, PDF file
- Additional Creators:
- U.S. Nuclear Regulatory Commission and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- In a recent criticality analysis for an array of water-moderated packages containing highly enriched uranium, the 123-group cross-section library in the SCALE system was observed to have a nonconservative discrepancy of approximately 3 to 3.5% when compared with more recently developed libraries. A simple representative system of UO₂F₂-H₂O was used to identify that the problem results from a lack of resonance data for ²³⁵U. Only a single set of self-shielded cross sections, most likely corresponding to a water-moderated infinite dilute system, was provided with the original data. The UO₂F₂-H₂O study indicates that this limitation may cause nonconservative discrepancies as high as 5.5% for some water-moderated, highly enriched uranium systems. Characteristics of the systems where the discrepancy is evident are identified and discussed.
- Report Numbers:
- E 1.99:nureg/cr--6328
E 1.99: ornl/tm--12970
- Published through SciTech Connect.
Wright, R.Q.; Jordan, W.C.; Parks, C.V.
- Funding Information:
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