Journal Published Online: 16 May 2007
Volume 4, Issue 4

Use of CPXSD for Generation of Effective Fast Multigroup Libraries for Pressure Vessel Fluence Calculations

CODEN: JAIOAD

Abstract

Multigroup (i.e., broad-group) libraries play a significant role in the accuracy of transport calculations. There are several broad-group libraries available for particular applications. For example the 47-neutron (26 fast groups), 20-gamma-group BUGLE libraries are commonly used for light water reactor shielding and pressure vessel dosimetry problems. However, there is no publicly available methodology to construct group structures for a problem and objective of interest. Therefore, we have developed the Contributon and Point-wise Cross-Section Driven (CPXSD) methodology, which constructs effective fine- and broad-group structures. In this paper, we use the CPXSD methodology to construct broad-group structures for fast neutron dosimetry problems. It is demonstrated that the broad-group libraries generated from CPXSD constructed group structures, while only 14 groups (rather than 26 groups) in the fast energy range are in good agreement (∼1 %–2 %) with the fine-group library from which they were derived, in reaction rate calculations.

Author Information

Alpan, F.
Oak Ridge National Laboratory, Oak Ridge, TN
Haghighat, Alireza
University of Florida, Gainesville, FL
Pages: 8
Price: $25.00
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Stock #: JAI100373
ISSN: 1546-962X
DOI: 10.1520/JAI100373