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New nuclear data libraries for lead and bismuth and their impact on accelerator-driven systems design

Author:
Koning, A. J.  Duijvestijn, M. C.  van der Marck, S. C.  Meulekamp, R. Klein  Hogenbirk, A.  


Journal:
NUCLEAR SCIENCE AND ENGINEERING


Issue Date:
2007


Abstract(summary):

New ENDF-6 formatted nuclear data libraries are presented for (204,206,207,208) Pb and Bi-209, for incident neutrons and protons. Apart from the resonance range, which we have adopted from the best available source in existing libraries, the nuclear data evaluations are completely revised in the 0 to 20 MeV energy range and moreover extend up to 200 MeV This collection of isotopic evaluations is created by using the nuclear model code TALYS with a consistent set of input parameters for all isotopes. The most important nuclear reaction models and parameters needed for our data files are described. We have intended to make these evaluations complete in their description of reaction channels, and use a consistent method to store the data in ENDF-6 format, which includes cross sections, angular distributions, double-differential spectra, discrete and continuum photon production cross sections; and residual production (activation) cross sections including isomers. It is shown that the data present in our libraries give an improved agreement with existing basic experimental data. Moreover, we have validated the new libraries with criticality and shielding benchmarks, where available. We present the results of neutronics calculations on subcritical accelerator-driven systems to show the impact of our new nuclear data on critical reactor parameters, such as k(eff), when compared with the existing ENDF/B-VI, JENDL, and JEFF libraries.


Page:
357---390


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