MODELING OF RADIOLYTIC PRODUCTION OF OXIDANTS RELEVANT TO CORROSION OF A USED FUEL CONTAINER IN DEEP GEOLOGIC REPOSITORY ENVIRONMENTS


41th Annual CNS-CNA Student Conference - 2017 June 05

Presented at:
41th Annual CNS-CNA Student Conference
2017 June 05
Location:
Niagara Falls, ON Canada
Session Title:
Student Posters, Wine-&-Cheese Reception

Authors:
R. Morco (Western University)
J.M. Joseph (Western University)
D. Shoesmith (Western University)
J.C. Wren (Western University)
  

Abstract

The Canadian used nuclear fuel disposal concept involves a deep geologic repository (DGR) using a multi-barrier system. A key barrier is the copper-coated steel used fuel container (UFC). Relative to other design concepts, coated containers have thinner walls that will provide less shielding for γ‑radiation, raising the possibility of radiolysis-induced corrosion. This work presents a chemical kinetics study on the gamma-radiolysis of environmental conditions anticipated in DGR. Humid air radiolysis produces nitric acid as the dominant oxidizing species at a concentration that increases linearly with dose rate.

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