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Events / Political / Finland Opens Onkalo Nuclear Waste Repository
Domestic nuclear waste storage

Finland Opens Onkalo Nuclear Waste Repository

Analysis based on 8 articles · First reported Jun 01, 2026 · Last updated Jun 01, 2026

Sentiment
50
Attention
4
Articles
8
Market Impact
General
Live prominence charts, article sentiment distribution, and event development timeline available on the Ergen Dashboard
Market Impact

The finalization of Onkalo by Finland is a significant development for the nuclear energy and waste management industries globally. It provides a potential blueprint for other nations like Sweden and France grappling with nuclear waste, potentially boosting investor confidence in long-term nuclear power viability. The project's success could lead to increased investment in nuclear infrastructure and related technologies, impacting companies like Teollisuuden Voima Oyj and Posiva positively.

Nuclear Energy Waste Management Utilities
Event Summary

Finland is on the verge of becoming the first country to open a permanent underground repository for spent nuclear fuel, named Onkalo, located 433 meters below ground in Eurajoki. Developed by Posiva since 2004 at an estimated cost of one billion euros, the facility is designed to safely store 6,500 tons of uranium-based spent fuel from Finland's five nuclear reactors for at least 100,000 years. The Finland — Radiation and Nuclear Safety Authority (STUK) is expected to grant an operating license in June, with operations anticipated to begin by late this year or early next year. The waste will be encapsulated in copper canisters, surrounded by bentonite clay, and sealed with concrete plugs. While similar projects in France have faced opposition, Onkalo has received broad public backing in Finland. The project addresses a global challenge of nuclear waste management and aligns with Finland's strategy to increase nuclear power, including considering small modular reactors.

Entities Involved
cnt
Finland
Finland is pioneering the world's first permanent underground repository for spent nuclear fuel, Onkalo, addressing a long-standing environmental challenge and reinforcing its commitment to nuclear energy.
Importance 100.0 Sentiment 60.0
priv
Posiva
Posiva is the nuclear waste management company that began building the Onkalo site in 2004 and is responsible for its development and operation, with its chemist Lauri Parviainen providing details on the facility's safety measures.
Importance 90.0 Sentiment 50.0
priv
Teollisuuden Voima Oyj
Teollisuuden Voima Oyj is the nuclear operator whose CEO, Philippe Bordarier, expects Onkalo to begin operations by early next year, indicating the company's direct involvement in the nuclear waste management process.
Importance 80.0 Sentiment 50.0
govactor
Finland — Radiation and Nuclear Safety Authority
The Finland — Radiation and Nuclear Safety Authority (STUK) is the regulatory body expected to give final approval for Onkalo's operating license in June, with its expert Jarkko Kyllönen assessing long-term risk scenarios.
Importance 70.0 Sentiment 50.0
oth
Olkiluoto Nuclear Power Plant
The Olkiluoto Nuclear Power Plant is the interim storage site for spent nuclear fuel that will be transferred to Onkalo, and it houses three of Finland's five nuclear reactors.
Importance 60.0 Sentiment 40.0
per
Philippe Bordarier
Philippe Bordarier, CEO of Teollisuuden Voima Oyj, expressed optimism about Onkalo's operational start by early next year, underscoring his company's role in the project.
Importance 60.0 Sentiment 50.0
per
Lauri Parviainen
Lauri Parviainen, a chemist at Posiva, provided technical details about the Onkalo facility's design and safety features, including the use of copper canisters and bentonite clay.
Importance 50.0 Sentiment 50.0
per
Jarkko Kyllönen
Jarkko Kyllönen, a nuclear safety expert at the Finland — Radiation and Nuclear Safety Authority, assessed the long-term risk scenarios for Onkalo, concluding that safety assessments have been positive.
Importance 50.0 Sentiment 50.0
per
Sari Multala
Sari Multala, Finland's Climate and Environment Minister, confirmed that Finnish law mandates domestic disposal of nuclear waste and highlighted the country's consideration of small modular reactors.
Importance 40.0 Sentiment 40.0
ngo
Finnish Association for Nature Conservation
The Finnish Association for Nature Conservation remains critical of the Onkalo project, with its director Tapani Veistola expressing concerns about the long-term safety of nuclear waste.
Importance 30.0 Sentiment -30.0
per
Matti Kojo
Matti Kojo, a social sciences professor at Lut University, noted the historically high public support for nuclear power in Finland, contributing to Onkalo's broader acceptance.
Importance 30.0 Sentiment 40.0
per
Tapani Veistola
Tapani Veistola, director of the Finnish Association for Nature Conservation, voiced the organization's critical stance on Onkalo, questioning the long-term safety guarantees.
Importance 30.0 Sentiment -30.0
cnt
Sweden
Sweden is mentioned as a country also building a final repository for nuclear waste, indicating a shared challenge in nuclear waste management.
Importance 20.0 Sentiment 0.0
cnt
France
France is mentioned as a country also building a final repository for nuclear waste, but its plans have faced strong opposition, contrasting with Finland's broader public backing.
Importance 20.0 Sentiment 0.0
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