Modeling reactive conversion of Ce ejecta in H$_2$ and D$_2$ gases

ORAL

Abstract

Shocked Ce metal in contact with a reactive gas such as H$_2$ or D$_2$ produces a distribution of ejecta particles that react with the gas to form Ce hydrides or deuterides. We present an average particle reaction diffusion model to calculate particle and gas temperatures and reaction fractions. We compare model results with recent HE driven Ce experiments into reactive D$_2$ and non-reactive He gases for a variety of initial gas pressures from 2 to 8 atmospheres at initial temperatures of 300 K. We find consistent agreement with radiance temperature measurements as a function of time using particle distributions from Mie scattering data resulting in Ce deuteride mass conversion fractions in D$_2$ gas of order 10 - 15 $\%$.

*This work was supported by the US Department of Energy through the Los Alamos National Laboratory. Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of U.S. Department of Energy (Contract No. 89233218CNA000001). This work was funded by the LANL LDRD DR program, grant 20170082DR, whose support is gratefully acknowledged.

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Authors

  • J.D. Schwarzkopf

    • Los Alamos National Laboratory

  • D.G. Sheppard

    • Los Alamos National Laboratory

  • J.E. Hammerberg

    • Los Alamos National Laboratory

  • Martin Schauer

    • Los Alamos National Laboratory
    • Physics Division, Los Alamos National Laboratory

  • William Buttler

    • Los Alamos National Laboratory
    • Physics Division, Los Alamos National Laboratory
    • LANL

  • Roland Schulze

    • Los Alamos National Laboratory
    • Weapons Systems Engineering, Los Alamos National Laboratory