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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.
C. A. Ordonez, R. Carrera, W. D. Booth, M. E. Oakes
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1740-1744
Impurity Control and Plasma-Facing Component | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29593
Articles are hosted by Taylor and Francis Online.
Tritium retention at the wall is an important consideration for the operation of a fusion ignition experiment. In this paper, the fusion ignition experiment IGNITEX is considered and tritium implantation, retention, and removal from the first wall are investigated. For the analysis, a new implantation model is used. The implantation model incorporates analytical fits to detailed Monte Carlo calculations of the implantation profile. The Monte Carlo calculations include the effect of the surface floating potential on the ion distribution function at the plasma-surface interface. Tritium retention at the first wall is shown to increase with incident fluence until saturation occurs. The isotope-exchange process for use in tritium removal at the wall is studied.