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ENDF/B-VIII.1: Updated Nuclear Reaction Data Library for Science and Applications.

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Title: ENDF/B-VIII.1: Updated Nuclear Reaction Data Library for Science and Applications.
Authors: Nobre, G.P.A.1 (AUTHOR) gnobre@bnl.gov, Capote, R.2 (AUTHOR), Pigni, M.T.3 (AUTHOR), Trkov, A.4 (AUTHOR), Mattoon, C.M.5 (AUTHOR), Neudecker, D.6 (AUTHOR), Brown, D.A.1 (AUTHOR), Chadwick, M.B.6 (AUTHOR), Kahler, A.C.6 (AUTHOR), Kleedtke, N.A.6 (AUTHOR), Zerkle, M.7 (AUTHOR), Hawari, A.I.8 (AUTHOR), Chapman, C.W.3 (AUTHOR), Fleming, N.C.8 (AUTHOR), Wormald, J.L.7 (AUTHOR), Ramić, K.3 (AUTHOR), Danon, Y.9 (AUTHOR), Gibson, N.A.6 (AUTHOR), Brain, P.9 (AUTHOR), Paris, M.W.6 (AUTHOR)
Source: Nuclear Data Sheets. May2026, Vol. 210, p1-224. 224p.
Subjects: Nuclear cross sections, Neutron scattering, Nuclear research
Abstract: The ENDF/B-VIII.1 library is the newest recommended evaluated nuclear data file by the Cross Section Evaluation Working Group (CSEWG) for use in nuclear science and technology applications, and incorporates advances made in the six years since the release of ENDF/B-VIII.0. Among key advances made are that the 239Pu file was reevaluated by a joint international effort and that updated 16,18O, 19F, 28–30Si, 50–54Cr, 55Mn, 54,56,57Fe, 63,65Cu, 139La, 233,235,238U, and 240,241Pu neutron nuclear data from the IAEA coordinated INDEN collaboration were adopted. Over 60 neutron dosimetry cross sections were adopted from the IAEA's IRDFF-II library. In addition, the new library includes significant changes for 3He, 6Li, 9Be, 51V, 88Sr, 103Rh, 140,142Ce, Dy, 181Ta, Pt, 206–208Pb, and 234,236U neutron data, and new nuclear data for the photonuclear, charged-particle and atomic sublibraries. Numerous thermal neutron scattering kernels were reevaluated or provided for the very first time. On the covariance side, work was undertaken to introduce better uncertainty quantification standards and testing for nuclear data covariances. The significant effort to reevaluate important nuclides has reduced bias in the simulations of many integral experiments with particular progress noted for fluorine, copper, and stainless steel containing benchmarks. Data issues hindered the successful deployment of the previous ENDF/B-VIII.0 for commercial nuclear power applications in high burnup situations. These issues were addressed by improving the 238U and 239,240,241Pu evaluated data in the resonance region. The new library performance as a function of burnup is similar to the reference ENDF/B-VII.1 library. The ENDF/B-VIII.1 data are available in ENDF-6 and GNDS format at https://doi.org/10.11578/endf/2571019. [ABSTRACT FROM AUTHOR]
Copyright of Nuclear Data Sheets is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: ENDF/B-VIII.1: Updated Nuclear Reaction Data Library for Science and Applications.
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  Data: <searchLink fieldCode="JN" term="%22Nuclear+Data+Sheets%22">Nuclear Data Sheets</searchLink>. May2026, Vol. 210, p1-224. 224p.
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  Data: The ENDF/B-VIII.1 library is the newest recommended evaluated nuclear data file by the Cross Section Evaluation Working Group (CSEWG) for use in nuclear science and technology applications, and incorporates advances made in the six years since the release of ENDF/B-VIII.0. Among key advances made are that the 239Pu file was reevaluated by a joint international effort and that updated 16,18O, 19F, 28–30Si, 50–54Cr, 55Mn, 54,56,57Fe, 63,65Cu, 139La, 233,235,238U, and 240,241Pu neutron nuclear data from the IAEA coordinated INDEN collaboration were adopted. Over 60 neutron dosimetry cross sections were adopted from the IAEA's IRDFF-II library. In addition, the new library includes significant changes for 3He, 6Li, 9Be, 51V, 88Sr, 103Rh, 140,142Ce, Dy, 181Ta, Pt, 206–208Pb, and 234,236U neutron data, and new nuclear data for the photonuclear, charged-particle and atomic sublibraries. Numerous thermal neutron scattering kernels were reevaluated or provided for the very first time. On the covariance side, work was undertaken to introduce better uncertainty quantification standards and testing for nuclear data covariances. The significant effort to reevaluate important nuclides has reduced bias in the simulations of many integral experiments with particular progress noted for fluorine, copper, and stainless steel containing benchmarks. Data issues hindered the successful deployment of the previous ENDF/B-VIII.0 for commercial nuclear power applications in high burnup situations. These issues were addressed by improving the 238U and 239,240,241Pu evaluated data in the resonance region. The new library performance as a function of burnup is similar to the reference ENDF/B-VII.1 library. The ENDF/B-VIII.1 data are available in ENDF-6 and GNDS format at https://doi.org/10.11578/endf/2571019. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nuclear Data Sheets is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.nds.2026.04.001
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        Text: English
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