Nuclear data sensitivity/uncertainty analysis for XT-ADS

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Abstract

The XT-ADS, an accelerator-driven system for an experimental demonstration, has been investigated in the framework of IP EUROTRANS FP6 project. In this study, the sensitivity and uncertainty analyses were performed to comprehend the reliability of the XT-ADS neutronic design. For the sensitivity analysis, it was found that the sensitivity coefficients were significantly different by changing the geometry models and calculation codes. For the uncertainty analysis, it was confirmed that the uncertainties deduced from the covariance data varied significantly by changing them. The uncertainties deduced from the covariance data for the XT-ADS criticality were 0.94%, 1.9% and 1.1% by the SCALE 44-group, TENDL-2009 and JENDL-3.3 data, respectively. When the target accuracy of 0.3%Dk for the criticality was considered, the uncertainties did not satisfy it. To achieve this accuracy, the uncertainties should be improved by experiments under an adequate condition.

Details

Original languageEnglish
Pages (from-to)1098-1108
JournalAnnals of nuclear energy
Volume38
Issue number5
DOIs
Publication statusPublished - 5 May 2011

Keywords

  • Uncertainty analysis, neutronic design accuracy, sensitivity coefficient, covariance data

ID: 300813