Volume 9, Issue 5 (May 2012)

    Development and Testing of the VITAMIN-B7/BUGLE-B7 Coupled Neutron-Gamma Multigroup Cross-Section Libraries

    (Received 10 June 2011; accepted 6 February 2012)

    Published Online: 2012

    CODEN: JAIOAD

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    Abstract

    The U.S. Nuclear Regulatory Commission’s Regulatory Guide 1.190 states that calculational methods used to estimate reactor pressure vessel (RPV) fluence should use the latest version of the evaluated nuclear data file (ENDF). The VITAMIN-B6 fine-group library and BUGLE-96 broad-group library, which are widely used for RPV fluence calculations, were generated using ENDF/B-VI.3 data, which was the most current data when Regulatory Guide 1.190 was issued. We have developed new fine-group (VITAMIN-B7) and broad-group (BUGLE-B7) libraries based on ENDF/B-VII.0. These new libraries, which were processed using the AMPX code system, maintain the same group structures as the VITAMIN-B6 and BUGLE-96 libraries. Verification and validation of the new libraries were accomplished using diagnostic checks in AMPX, “unit tests” for each element in VITAMIN-B7, and a diverse set of benchmark experiments including critical evaluations for fast and thermal systems, a set of experimental benchmarks that are used for SCALE regression tests, and three RPV fluence benchmarks. The benchmark evaluation results demonstrate that VITAMIN-B7 and BUGLE-B7 are appropriate for use in RPV fluence calculations and meet the calculational uncertainty criterion in Regulatory Guide 1.190.


    Author Information:

    Risner, J. M.
    Oak Ridge National Laboratory, Oak Ridge, TN

    Wiarda, D.
    Oak Ridge National Laboratory, Oak Ridge, TN

    Miller, T. M.
    Oak Ridge National Laboratory, Oak Ridge, TN

    Peplow, D. E.
    Oak Ridge National Laboratory, Oak Ridge, TN

    Patton, B. W.
    Oak Ridge National Laboratory, Oak Ridge, TN

    Dunn, M. E.
    Oak Ridge National Laboratory, Oak Ridge, TN

    Parks, B. T.
    U.S. Nuclear Regulatory Commission, Office of Nuclear Reactor Regulation, Rockville, MD


    Stock #: JAI104130

    ISSN: 1546-962X

    DOI: 10.1520/JAI104130

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    Author
    Title Development and Testing of the VITAMIN-B7/BUGLE-B7 Coupled Neutron-Gamma Multigroup Cross-Section Libraries
    Symposium , 0000-00-00
    Committee E10