The AMPX/SCALE multigroup cross section processing for fast reactor analysis

Kang Seog Kim, Mark L. Williams, Andrew M. Holcomb, Dorothea Wiarda, Byoung Kyu Jeon, Won Sik Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Significant reactivity biases have been observed for fast reactor designs and boiling water reactors with very high void fractions in the AMPX/SCALE multigroup (MG) cross section processing procedure. Detailed investigation to resolve this problem indicated that the bias is from poor quality of unresolved resonance self-shielded data and high energy neutron spectra. The issue was resolved by regenerating the probability tables with proper normalization, obtaining the MG unresolved resonance data based on the analytic probability table method with the narrow resonance approximation, and using very fine group structure typically used in the fast system analysis. This study focused on verifying the probability table and the AMPX/SCALE MG cross section processing procedure by performing reaction rate analysis and benchmark calculations for various fast reactor fuels. Results indicate that AMPX/SCALE MG cross section processing works correctly for the fast reactor analysis.

Original languageEnglish
Title of host publicationInternational Conference on Physics of Reactors, PHYSOR 2018
Subtitle of host publicationReactor Physics Paving the Way Towards More Efficient Systems
PublisherSociedad Nuclear Mexicana, A.C.
Pages732-741
Number of pages10
ISBN (Electronic)9781713808510
StatePublished - 2018
Event2018 International Conference on Physics of Reactors: Reactor Physics Paving the Way Towards More Efficient Systems, PHYSOR 2018 - Cancun, Mexico
Duration: Apr 22 2018Apr 26 2018

Publication series

NameInternational Conference on Physics of Reactors, PHYSOR 2018: Reactor Physics Paving the Way Towards More Efficient Systems
VolumePart F168384-2

Conference

Conference2018 International Conference on Physics of Reactors: Reactor Physics Paving the Way Towards More Efficient Systems, PHYSOR 2018
Country/TerritoryMexico
CityCancun
Period04/22/1804/26/18

Keywords

  • AMPX/SCALE
  • Cross section
  • Fast reactor
  • Unresolved probability table

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