Total thermal neutron cross section measurements of yttrium hydride from 0.0005 - 3 eV

D. Fritz; Y. Danon; M. Rapp; T. H. Trumbull; M. Zerkle; J. Holmes; C. W. Chapman; G. Arbanas; J. M. Brown; K. Ramic; X. Hu; S. Singh; A. Ney; P. Brain; K. Cook; B. Wang

doi:10.1016/j.anucene.2022.109475

Total thermal neutron cross section measurements of yttrium hydride from 0.0005 - 3 eV

D. Fritz, Y. Danon, M. Rapp, T. H. Trumbull, M. Zerkle, J. Holmes, C. W. Chapman, G. Arbanas, J. M. Brown, K. Ramic, X. Hu, S. Singh, A. Ney, P. Brain, K. Cook, B. Wang

Nuclear Data

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Abstract

Yttrium hydride serves as a neutron moderator material that enables compact, high temperature nuclear reactors. However, in order to accurately design and simulate a nuclear system relying upon yttrium hydride, the fundamental nuclear data of yttrium hydride must be well understood. Thermal neutron scattering law (TSL) evaluations represent an important aspect of nuclear data as thermal scattering can drastically alter the neutron multiplication factor of a system. Therefore, to support evaluation and validation of thermal neutron scattering for yttrium hydride, researchers at Rensselaer Polytechnic Institute (RPI) performed total thermal neutron cross section measurements for YH_1.68 and YH_1.85 over the energy range of 0.0005 - 3 eV. These measurements represent the first total cross section measurements for yttrium hydride that encompass the entire thermal region. Comparisons were made against the ENDF-B/VIII.0, Zerkle & Holmes and Oak Ridge National Laboratory TSL evaluations, where generally good agreement was found.

Original language	English
Article number	109475
Journal	Annals of Nuclear Energy
Volume	181
DOIs	https://doi.org/10.1016/j.anucene.2022.109475
State	Published - Feb 2023

Funding

The authors would like to thank Oak Ridge National Laboratory (ORNL) for their fabrication of the yttrium hydride samples. In addition, thanks goes out to the RPI LINAC technical staff for their assistance in conducting these measurements. This work was supported by the Nuclear Criticality Safety Program, funded and managed by the National Nuclear Security Administration, United States for the Department of Energy. Additionally, this material is based upon work supported under an Integrated University Program Graduate Fellowship . This research was sponsored by the Transformational Challenge Reactor Program of the US Department of Energy Office of Nuclear Energy . Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of DOE. The authors would like to thank Oak Ridge National Laboratory (ORNL) for their fabrication of the yttrium hydride samples. In addition, thanks goes out to the RPI LINAC technical staff for their assistance in conducting these measurements. This work was supported by the Nuclear Criticality Safety Program, funded and managed by the National Nuclear Security Administration, United States for the Department of Energy. Additionally, this material is based upon work supported under an Integrated University Program Graduate Fellowship. This research was sponsored by the Transformational Challenge Reactor Program of the US Department of Energy Office of Nuclear Energy. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of DOE.

Funders	Funder number
U.S. Department of Energy
Office of Nuclear Energy
National Nuclear Security Administration
Oak Ridge National Laboratory

Keywords

Scattering kernels
Total cross section
Yttrium hydride

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10.1016/j.anucene.2022.109475

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Fritz, D., Danon, Y., Rapp, M., Trumbull, T. H., Zerkle, M., Holmes, J., Chapman, C. W., Arbanas, G., Brown, J. M., Ramic, K., Hu, X., Singh, S., Ney, A., Brain, P., Cook, K., & Wang, B. (2023). Total thermal neutron cross section measurements of yttrium hydride from 0.0005 - 3 eV. Annals of Nuclear Energy, 181, Article 109475. https://doi.org/10.1016/j.anucene.2022.109475

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abstract = "Yttrium hydride serves as a neutron moderator material that enables compact, high temperature nuclear reactors. However, in order to accurately design and simulate a nuclear system relying upon yttrium hydride, the fundamental nuclear data of yttrium hydride must be well understood. Thermal neutron scattering law (TSL) evaluations represent an important aspect of nuclear data as thermal scattering can drastically alter the neutron multiplication factor of a system. Therefore, to support evaluation and validation of thermal neutron scattering for yttrium hydride, researchers at Rensselaer Polytechnic Institute (RPI) performed total thermal neutron cross section measurements for YH1.68 and YH1.85 over the energy range of 0.0005 - 3 eV. These measurements represent the first total cross section measurements for yttrium hydride that encompass the entire thermal region. Comparisons were made against the ENDF-B/VIII.0, Zerkle & Holmes and Oak Ridge National Laboratory TSL evaluations, where generally good agreement was found.",

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AU - Holmes, J.

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AU - Arbanas, G.

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AU - Ramic, K.

AU - Hu, X.

AU - Singh, S.

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AU - Cook, K.

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N2 - Yttrium hydride serves as a neutron moderator material that enables compact, high temperature nuclear reactors. However, in order to accurately design and simulate a nuclear system relying upon yttrium hydride, the fundamental nuclear data of yttrium hydride must be well understood. Thermal neutron scattering law (TSL) evaluations represent an important aspect of nuclear data as thermal scattering can drastically alter the neutron multiplication factor of a system. Therefore, to support evaluation and validation of thermal neutron scattering for yttrium hydride, researchers at Rensselaer Polytechnic Institute (RPI) performed total thermal neutron cross section measurements for YH1.68 and YH1.85 over the energy range of 0.0005 - 3 eV. These measurements represent the first total cross section measurements for yttrium hydride that encompass the entire thermal region. Comparisons were made against the ENDF-B/VIII.0, Zerkle & Holmes and Oak Ridge National Laboratory TSL evaluations, where generally good agreement was found.

AB - Yttrium hydride serves as a neutron moderator material that enables compact, high temperature nuclear reactors. However, in order to accurately design and simulate a nuclear system relying upon yttrium hydride, the fundamental nuclear data of yttrium hydride must be well understood. Thermal neutron scattering law (TSL) evaluations represent an important aspect of nuclear data as thermal scattering can drastically alter the neutron multiplication factor of a system. Therefore, to support evaluation and validation of thermal neutron scattering for yttrium hydride, researchers at Rensselaer Polytechnic Institute (RPI) performed total thermal neutron cross section measurements for YH1.68 and YH1.85 over the energy range of 0.0005 - 3 eV. These measurements represent the first total cross section measurements for yttrium hydride that encompass the entire thermal region. Comparisons were made against the ENDF-B/VIII.0, Zerkle & Holmes and Oak Ridge National Laboratory TSL evaluations, where generally good agreement was found.

KW - Scattering kernels

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Total thermal neutron cross section measurements of yttrium hydride from 0.0005 - 3 eV

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