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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Willem J. Quadakkers, Hans Schuster
Nuclear Technology | Volume 66 | Number 2 | August 1984 | Pages 383-391
D.Gas/Metal Reaction | Status of Metallic Materials Development for Application in Advanced High-Temperature Gas-Cooled Reactor / Material | doi.org/10.13182/NT84-A33441
Articles are hosted by Taylor and Francis Online.
In corrosion tests with iron- and nickel-based alloys in simulated cooling gases of the primary circuit of high-temperature gas-cooled reactors (HTGR helium), different effects have been found. The materials may be carburized or decarburized, depending on gas composition, gas supply rate, and test temperature. The surface scales may be composed of oxides and spinels, of mixed oxide/carbide layers, or of carbides, and internal oxidation may become significant. The basic corrosion mechanism could not be explained by the simple use of thermodynamics, but a significant step forward is possible if the kinetics of the different oxidation and carburization reactions are taken into account. The classical stability diagram for chromium, the most important alloying element in these alloys, can then be used for the prediction of the corrosion effects and the corrosion products. Besides the usual description of reaction rates, the kinetics must include the changes in the oxidizing and carburizing potentials at the metallic surface caused by surface scale formation. The influence of some additional alloying elements present in commercial high-temperature alloys can be estimated by comparing their stability with the stability of chromium.