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2026 ANS Winter Conference & Expo
November 15–18, 2026
Phoenix, AZ|Arizona Grand Resort & Spa
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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|Panel|Sponsored by MCD
Monday, June 8, 2020|1:00–3:10PM EDT|8
Session Chair:
Robert E. Grove
Session Organizer:
Alternate Chair:
Steven P. Hamilton
Staff Producer:
Daniel Goldberg (American Nuclear Society)
Title: Challenges in Large-scale Modeling and Simulation for Nuclear Systems. The increase in affordable computing capacity, in availability of computer codes designed for high performance computing, and in the need for varying levels of solution fidelity for analysis, design and licensing of complex nuclear systems has driven a desire for multi-scale, multi-physics modeling and simulation capabilities and has required dramatic shifts in the size and fidelity of computational models and computer simulations. This roundtable will feature perspectives from both developers and appliers of computer codes for modeling and simulation across a number of nuclear systems. The purpose is to have an application-focused discussion of how the needs of various emerging nuclear applications are driving the development of tools for analysis and design of complex nuclear systems, and the challenges that are emerging.
Katherine Royston
ORNL
Eva Davidson
Terry Haut
LLNL
Kostas Kravvaris
Joel Kulesza
LANL
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