Evaluation of Tungsten Nuclear Reaction Data with Covariances

Journal Article · Mon Dec 15 04:00:00 EST 2008 · Nuclear Data Sheets

DOI:https://doi.org/10.1016/j.nds.2008.11.032· OSTI ID:21163790

Capote, R ^[1]; Kodeli, I ^[2]; Leal, L ^[3]

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1. Nuclear Data Section, International Atomic Energy Agency, Vienna (Austria)
2. IAEA representative at the NEA Data Bank, Paris (France)
3. Oak Ridge National Laboratory, Oak Ridge, TN (United States)

As a follow-up of the work presented at the ND-2007 conference in Nice, additional fast reactor benchmarks were analyzed. Adjustment to the cross sections in the keV region was necessary. Evaluated neutron cross section data files for {sup 180,182,183,184,186}W isotopes were produced. Covariances were generated for all isotopes except {sup 180}W. In the resonance range the retro-active method was used. Above the resolved resonance range the covariance prior was generated by the Monte Carlo technique from nuclear model calculations with the Empire-II code. Experimental data were taken into account through the GANDR system using the generalized least-squares technique. Introducing experimental data results in relatively small changes in the cross sections, but greatly constrains the uncertainties. The covariance files are currently undergoing testing.

• OSTI ID: 21163790
• Journal Information: Nuclear Data Sheets, Journal Name: Nuclear Data Sheets Journal Issue: 12 Vol. 109; ISSN NDTSBA; ISSN 0090-3752
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BENCHMARKS
CROSS SECTIONS
EVALUATED DATA
EVALUATION
EXPERIMENTAL DATA
FAST REACTORS
KEV RANGE
LEAST SQUARE FIT
MONTE CARLO METHOD
NEUTRON REACTIONS
NUCLEAR DATA COLLECTIONS
NUCLEAR MODELS
TUNGSTEN 180
TUNGSTEN 182
TUNGSTEN 183
TUNGSTEN 184
TUNGSTEN 186