Covariance propagation in spectral indices

Journal Article · Fri Jan 09 00:00:00 EST 2015 · Nuclear Data Sheets

DOI:https://doi.org/10.1016/j.nds.2014.12.018· OSTI ID:1141582

Griffin, P. J. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

In this study, the dosimetry community has a history of using spectral indices to support neutron spectrum characterization and cross section validation efforts. An important aspect to this type of analysis is the proper consideration of the contribution of the spectrum uncertainty to the total uncertainty in calculated spectral indices (SIs). This study identifies deficiencies in the traditional treatment of the SI uncertainty, provides simple bounds to the spectral component in the SI uncertainty estimates, verifies that these estimates are reflected in actual applications, details a methodology that rigorously captures the spectral contribution to the uncertainty in the SI, and provides quantified examples that demonstrate the importance of the proper treatment the spectral contribution to the uncertainty in the SI.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000
• OSTI ID: 1141582
• Alternate ID(s): OSTI ID: 22436766; OSTI ID: 1141356
• Report Number(s): SAND--2014-2717J; PII: S0090375214006978
• Journal Information: Nuclear Data Sheets, Journal Name: Nuclear Data Sheets Journal Issue: C Vol. 123; ISSN 0090-3752
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY