| Autor: |
Talou, Patrick, Young, Phillip G., Chadwick, Mark B. |
| Zdroj: |
Journal of Nuclear Science and Technology; August 2002, Vol. 39 Issue: Supplement 2 p132-135, 4p |
| Abstrakt: |
A new improved covariance analysis of neutron-induced fission reactions on 239Pu has been conducted for neutron incident energies between 0.1 and 20 MeV. Plutonium-239 is a very important isotope in the US nuclear spent fuel stockpile, where it is considered as a waste and eventually a proliferation problem. Recently available experimental data sets, both absolute and in ratio to the standard 235U, have been included in this new study. A Bayesian inference approach has been used to infer cross sections and associated uncertainties and correlations. The evaluated errors are significantly reduced compared to the previous ENDF evaluation. The importance of the choice of the 235U (n, f) standard is revealed through a comparison with the most recent Japanese evaluation. Finally, we introduce new ideas and techniques that will be used in our forthcoming cross sections evaluations for other actinides of importance for ADS. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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