ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Measurements of transient diffusion phenomena are reported for a “high-reactivity”, 20% open-pore volume (OPV), nuclear graphite, in the virgin state and after thermal oxidation in air or radiolytic oxidation in a carbon dioxide/carbon monoxide/methane coolant mixture. The volume of restricted access pores (RAPs) in this graphite is small (〈 5% of the OPV) and the changes in pore structure with oxidation are in general very similar for thermal and radiolytic oxidation. A significant difference is that the RAP volume decreased (as expected) on slow thermal oxidation, but showed a slight increase during radiolytic oxidation. This is consistent with a model in which the methane is severely depleted in RAPs, which are therefore subject to an effectively uninhibited corrosion.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00543900
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