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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Deep geologic repository progress—2025 Update
Editor's note: This article has was originally published in November 2023. It has been updated with new information as of June 2025.
Outside my office, there is a display case filled with rock samples from all over the world. It contains a disk of translucent, orange salt from the Waste Isolation Pilot Plant near Carlsbad, N.M.; a core of white-and-bronze gneiss from the site of the future deep geologic repository in Eurajoki, Finland; several angular chunks of fine-grained, gray claystone from the underground research laboratory at Bure, France; and a piece of coarse-grained granite from the underground research tunnel in Daejeon, South Korea.
A.G. Heics, W.T. Shmayda, N.P. Kherani
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1686-1691
Material and Tritium | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29584
Articles are hosted by Taylor and Francis Online.
A zirconium cobalt bed has been designed with large conductance, low porosity filters and a large bed containment mass to improve the rate of hydriding. By ensuring that sufficient thermal ballast is available, the hydriding rate will be exponential thereby approaching the desired isothermal limit. Loading dependencies upon initial tank pressure and bed capacity at ambient temperature have been studied. Hydrided ZrCo powder was observed to spontaneously combust in air at ambient temperature after undergoing 12 hydriding/dehydriding cycles. ZrCo powder progressively fragments into submicronic fines with continued bed cycling up to 35 bed cycles. No permanent degradation in the rate of hydrogen loading onto ZrCo has been observed during 95 hydriding/dehydriding cycles.