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Influence of boron isotope ratio on the thermal conductivity of uranium diboride (UB2) and zirconium diboride (ZrB2)

Journal Article · · Journal of Nuclear Materials
 [1];  [1];  [2];  [1];  [1];  [3]
  1. Bangor Univ., Gwynedd (United Kingdom). Nuclear Futures Inst.
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Bangor Univ., Gwynedd (United Kingdom). Nuclear Futures Inst.; Imperial College London, London (United Kingdom). Inst. for Security Science and Technology

Uranium diboride is being proposed as an accident tolerant fuel (either as a part of a composite or an 11B enriched monolithic fuel pellet), while zirconium diboride is often selected as a burnable absorber in conjunction with uranium dioxide fuel pellets. It is therefore important to understand the thermal properties of these materials and examine methods in which they may be improved. The thermal conductivity of UB2 and ZrB2 is calculated through atomic scale modelling methods. Lastly, it was found that the boron-isotope ratio has a significant impact on the thermal conductivity of ZrB2, but is negligible for UB2 due to the large electron-phonon scattering.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1576937
Report Number(s):
LA-UR--19-25332
Journal Information:
Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 528; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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