OECD/NEA expert group on uncertainty analysis for criticality safety assessment: Current activities

Tatiana Ivanova, Frederic Fernex, Edwin Kolbe, Alexander Vasiliev, Gil Soo Lee, Sweng Ng Woo, Dennis Mennerdahl, Yasunobu Nagaya, Jens Christian Neuber, Axel Hoefer, Bradley Rearden, Don Mueller, Yolanda Rugama, Alain Santamarina, Christophe Venard, Anatoly Tsiboulia, Yury Golovko

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

9 Scopus citations

Abstract

The expert group (EG) on Uncertainty Analysis for Criticality Safety Assessment (UACSA) was established within the OECD/NEA Working Party on Nuclear Criticality Safety in December 2007 to promote exchange of information on related topics; compare methods and software tools for uncertainty analysis; test their performance; and assist in selection/development of safe and efficient methodologies. At the current stage, the work of the group is focused on approaches for validation of criticality calculations. With the diversity of the approaches to validate criticality calculations, a thorough description of each approach and assessment of its performance is useful to the criticality safety community. Developers, existing and potential practitioners as well as reviewers of assessments using those approaches should benefit from this effort. Exercise Phase I was conducted in order to illustrate predictive capabilities of criticality validation approaches, which include similarity assessment, definition of keff bias and bias uncertainty, and selection of benchmarks. The approaches and results of the exercises will be thoroughly documented in a pending state-of-the-art report from the EG. This paper provides an overview of current and future activities for the EG, a summary of the participant-contributed validation approaches, and a synthesis of the results for the exercises.

Original languageEnglish
Title of host publicationInternational Conference on the Physics of Reactors 2010, PHYSOR 2010
PublisherAmerican Nuclear Society
Pages2212-2226
Number of pages15
ISBN (Print)9781617820014
StatePublished - 2010
EventInternational Conference on the Physics of Reactors 2010, PHYSOR 2010 - Pittsburgh, United States
Duration: May 9 2010May 14 2010

Publication series

NameInternational Conference on the Physics of Reactors 2010, PHYSOR 2010
Volume3

Conference

ConferenceInternational Conference on the Physics of Reactors 2010, PHYSOR 2010
Country/TerritoryUnited States
CityPittsburgh
Period05/9/1005/14/10

Keywords

  • Benchmark
  • Bias
  • Criticality safety
  • OECD/NEA
  • Subcritical limit
  • Uncertainty

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