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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.
Teruya Tanaka, Akio Sagara, Juro Yagi, Takeo Muroga
Fusion Science and Technology | Volume 75 | Number 8 | November 2019 | Pages 1002-1009
Technical Paper | doi.org/10.1080/15361055.2019.1658044
Articles are hosted by Taylor and Francis Online.
In 2013–2014, the FliNaK/LiPb twin-loop system Operational Recovery Of Separated Hydrogen and Heat Inquiry-2 (Oroshhi-2) was constructed at National Institute for Fusion Science as a liquid blanket collaboration platform. Inventory of FLiNaK and LiPb in the system is ~120 L for each, and both loops are providing a stable circulation environment. Oroshhi-2 has flexible capability to perform integrated experiments by installing all the components required for the liquid blanket system in one circulating loop at the same time. A 3-T superconducting magnet and 1-T permanent magnet enable simulation of the reactor environment except for radiations. As of the year of 2018, eight experimental topics related to liquid blanket technologies have been performed, prepared, or proposed as the first step of the Oroshhi-2 experiments. These topics cover the various blanket issues widely from first wall to secondary loop for power generation.