Sensitivity of Subcritical Measurement Simulations to Neutron Cross-Section Data

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Evaluation of nuclear data typically includes validation of the data through computation of k{sub eff}for critical assemblies. The sensitivity of the computed k{sub eff} values to the nuclear data is used as an indicator in determining the adequacy of an evaluation. Subcritical measurements offer an alternative to critical experiments as a means to evaluate nuclear data through direct computation of subcritical measurement quantities. In some instances, the subcritical measurement quantities are more sensitive to nuclear data changes than the computed k{sub eff} values. Simulations of subcritical source-driven noise measurements were performed for highly enriched uranium metal cylinders and highly enriched ... continued below

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Valentine, T.E. August 24, 2001.

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Evaluation of nuclear data typically includes validation of the data through computation of k{sub eff}for critical assemblies. The sensitivity of the computed k{sub eff} values to the nuclear data is used as an indicator in determining the adequacy of an evaluation. Subcritical measurements offer an alternative to critical experiments as a means to evaluate nuclear data through direct computation of subcritical measurement quantities. In some instances, the subcritical measurement quantities are more sensitive to nuclear data changes than the computed k{sub eff} values. Simulations of subcritical source-driven noise measurements were performed for highly enriched uranium metal cylinders and highly enriched uranyl nitrate solutions to demonstrate the sensitivity of the computed subcritical quantities to nuclear data. A particular ratio of spectral quantities from the source-driven noise measurements is of interest because of its independence of detection efficiency and source intensity. These simulations indicate that the spectral ratio is more sensitive to nuclear data evaluations than the computed k{sub eff} values for these systems. Direct simulation of subcritical measurements offers additional means to validate nuclear data evaluations.

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  • International Conference on Nuclear Data for Science and Technology, Tsukuba (JP), 10/07/2001--10/12/2001

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  • Report No.: P01-111586
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 788683
  • Archival Resource Key: ark:/67531/metadc715921

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 24, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 23, 2016, 4:53 p.m.

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Valentine, T.E. Sensitivity of Subcritical Measurement Simulations to Neutron Cross-Section Data, article, August 24, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc715921/: accessed January 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.