EPJ Web of Conferences (Jan 2024)

Radiation characterization summary for the WSMR fast burst reactor environment at the 6-inch location

  • Redhouse Danielle,
  • Lum Edward S.,
  • Koglin Johnathon,
  • Parma Edward J.,
  • Peters Curtis D.,
  • Finko Mikhail,
  • Roebuck Jesse M.,
  • Vehar David W.,
  • Sage Frank,
  • Tonigan Andrew M.,
  • Mulcahy Ryan,
  • Ball Thomas A.,
  • Pelfrey Elliott,
  • Moreno Melissa,
  • Currie Karissa,
  • Griffin Patrick J.

DOI
https://doi.org/10.1051/epjconf/202430806008
Journal volume & issue
Vol. 308
p. 06008

Abstract

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The characterization of the neutron, prompt gamma-ray, and delayed gamma-ray radiation fields for the White Sands Missile Range (WSMR) Fast Burst Reactor, also known as molybdenum-alloy Godiva (Molly-G) has been assessed at the 6-inch irradiation location. The neutron energy spectra, uncertainties, and common radiation metrics are presented. Code-dependent recommended constants are given to facilitate the conversion of various dosimetry readings into radiation metrics desired by experimenters. The Molly-G core was designed and configured similarly to Godiva II, as an unreflected, unmoderated, cylindrical annulus of uranium-molybdenum-alloy fuel with molybdenum loading of 10%. At the 6-inch position, the axial fluence maximum is about 2.4×1013 n/cm2 per MJ of reactor energy; about 0.1% of the neutron fluence is below 1 keV and 96% is above 100 keV. The 1-MeV Damage-Equivalent Silicon (DES) fluence is estimated at 2.2×1013 n/cm2 per MJ of reactor energy. The prompt gamma-ray dose is roughly 2.5E+03 rad(Si) per MJ and the delayed gamma-ray dose is about 1.3E+03 rad(Si) per MJ.