Impact of Cross-Section-Covariance Data on Results of High-Confidence Criticality Validation

Иванова, Т. С.; Duhamel, Isabelle; Létang, Eric

doi:10.3938/jkps.59.1170

Cited by 3 publications

(2 citation statements)

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“…The sensitivity calculation scheme is presented in Figure 3. The sensitivity coefficient gives the relative change in the system multiplication factor value as a function of the relative change in the 232 Th capture cross section data [10].…”

Section: Methodsmentioning

confidence: 99%

“…shows the covariance matrix that expresses the correlation in the 232 Th ( , ) cross section for energy groups. In this study, it is generated in a 107-group energy structure to map them into the same group structure as the sensitivity coefficients [10]. The covariance data for 232 Th capture cross section is derived from the JENDL-4.0 and ENDF/B-VII evaluated nuclear data file using ERRORR module for NJOY99 code [11].…”

Section: Methodsmentioning

confidence: 99%

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Impact of Thorium Capture Cross Section Uncertainty on the Thorium Utilized ADS Reactivity Calculation

Kitada

2014

Science and Technology of Nuclear Installations

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Recently, the researches on fast neutron spectrum system utilized thorium fuel are widely conducted. However, the recent thorium cross section libraries are limited compared to uranium cross section libraries. The impact of thorium cross section uncertainty on thorium fuel utilized accelerator driven system (ADS) reactivity calculation is estimated in this study. The uncertainty of thekeffcaused by232Th capture cross section of JENDL-4.0 is about 1.3%. The uncertainty of JENDL-4.0 is needed to be enhanced to provide more reliable results on reactivity calculation for the fast system. The impact of uncertainty of 232Th capture cross section of ENDF/B-VII is small (0.1%). Therefore, it will cause no significant impact of the thorium cross section library on the thorium utilized ADS design calculation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%