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Report No.
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Important comments on TENDL-2015

Konno, Chikara  

TENDL-2015 up to 200 MeV of injection particle upper energy has been used as a standard nuclear data library, particularly in Europe. Recently I tested the official ENDF and ACE files of TENDL-2015 neutron sub-library and found the following problems. (1) There are no unresolved resonance data in a lot of the ACE files. Thus calculated results are not correct in the case that the self-shielding effect in the unresolved resonance region is large. (2) There are no gamma production data in a lot of the ACE files. This is due to an inadequate NJOY input. Thus gamma fluxes in neutron-gamma coupling calculations are not correct, since MCNP calculations uses particle production data in place of gamma production data in ACE files. This issue also occurs in the ACE files of the proton, deuteron, triton, and helium sub-libraries. (3) There are no high-energy gamma peaks in the capture reaction of a lot of the ENDF files. This issue causes incorrect gamma fluxes in neutron-gamma coupling calculations and incorrect DPA cross section data. The gamma production data in the capture reaction of the ENDF files in the TENDL-2015 neutron sub library should be revised and ACE files in TENDL-2015 should be re-processed with an adequate NJOY input.

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