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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.
P. R. Coronado, E. M. Fearon, R. G. Garza, J. F. Shaw, P. C. Souers, R. K. Stump, R. T. Tsugawa
Fusion Science and Technology | Volume 14 | Number 2 | September 1988 | Pages 741-743
Tritium Properties and Interactions with Material | Proceedings of the Third Topical Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications (Toronto, Ontario, Canada, May 1-6, 1988) | doi.org/10.13182/FST88-A25223
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The He3 output from two palladium and two uranium beds that store T2 and D-T was studied as a function of time. Three of the beds were started new and watched for 1 yr; the fourth bed was 12 yr old. All four beds were used in routine tritium handling. Initial stoichiometries were PdT0.3 and UT0.7 so that both operated at similar pressures from 1 to 130 kPa. The He3 from palladium ranged from the 0.002 mol% lower level of sensitivity to 0.01% for Pd/T2 at 1 yr of age. The U/T system showed 0.1% He3 at 4 to 62 days and 0.1 to 10% at longer times, with the first cuts being high in He3. The palladium bed with 95 to 97% pure T2 enriches the output to as high as 97 to 99%.