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Conference Spotlight
2026 ANS Winter Conference & Expo
November 15–18, 2026
Phoenix, AZ|Arizona Grand Resort & Spa
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Nuclear Science and Engineering
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August 2026
Latest News
Posiva begins drilling disposal holes at Finland’s Onkalo repository
Last week the Finnish nuclear waste management company Posiva began drilling holes for final disposal at the Onkalo deep geological repository, near the Olkiluoto nuclear power plant in western Finland. The company’s German-made Deposition Hole Boring Machine (DHBM) took about 10 hours to drill the first hole, with a depth of 8.4 meters and a diameter of 1.75 meters, into the 1.9-billion-year-old bedrock. This is the first deposition hole intended for an iron-copper canister containing spent nuclear fuel—though test holes have been drilled at the site since 2022.
The Onkalo repository received a favorable safety assessment from the Radiation and Nuclear Safety Authority of Finland earlier in August.
Technical Session|Sponsored by THD
Monday, June 8, 2020|1:00–3:10PM EDT|5
Session Chair:
Marilyn Delgado
Alternate Chair:
Guillaume P. Mignot
Session Organizer:
Jun Wang
Track Organizer:
Igor Bolotnov (NCSU)
Staff Producer:
Janice Lindegard (American Nuclear Society)
WELCOME TO THE FIRST ANS VIRTUAL MEETING! This session is sponsored by the Thermal Hydraulics Division. We have four speakers within this session. The summaries are available for download. Each session will be recorded in case you miss it!
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High Fidelity Characterization of the Flow in a 5x5 Rod Bundle with a Customized Spacer Grid
Yassin Hassan (Texas A&M Univ.), Thien Nguyen (Texas A&M Univ.), Gabriel C. Q. Tomaz (Texas A&M Univ.), Camila F. Matozinhos (Texas A&M Univ.)
Paper
Experimental Quantification of Form Drag on Rising Bubbles Using PIV
Qiao Wu (Oregon State Univ.), Wade Marcum (Oregon State Univ.), Isaiah Wieland (Oregon State Univ.), Alexander Duenas (Oregon State Univ.)
Design of a Pebble Bed Heat Transfer Separate Effects Test
Nicolas Zweibaum (Kairos Power, LLC), Brian Woods (Oregon State Univ.), Connor Dionne (Oregon State Univ.), Shikha Kumar (Oregon State Univ.), Joshua Halsted (Oregon State Univ.), Izabela Gutowska (Oregon State Univ.), Jacob Uselman (Oregon State Univ.)
Investigation of the influence of the bundle geometry distortion on the critical heat flux
Daniya Kireeva (NRC Kurchatov Institute), Dmitry Oleksyuk (NRC Kurchatov Institute)