On the importance of resonance-dependent S(α,β) tables for criticality values

Research output: Contribution to journalConference articlepeer-review

Abstract

The new development of a formula for ideal gas scattering kernel with strongly energy dependent scattering cross sections [1] suitable to NJOY [2] enabled the preparation of S(α,β) tables for U238 in the Resolved resonance region[3], which can replace the approximated solution technique in the MCNP code[4]. In this study the importance of using appropriate S(α,β) tables for U238 are examined for different fuel pin types and different U235 concentrations. For common PWR fuel pins the use of modified scattering kernel causes up to 0.5% reduction in the criticality and by higher fuel enrichment the deviation from the original MCNP results grows when the new S(α,β) tables are introduced.

Original languageEnglish
Pages (from-to)667-668
Number of pages2
JournalTransactions of the American Nuclear Society
Volume92
StatePublished - 1 Dec 2005
Externally publishedYes
Event2005 Annual Meeting - American Nuclear Society - San Diego, CA, United States
Duration: 5 Jun 20059 Jun 2005

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