1.9B year old bedrock will soon house first permanent nuclear waste site (apnews.com)

• Onkalo repository leverages 1.9-billion-year-old granite bedrock for geologic containment.
• Encapsulation in copper-iron canisters ensures waste isolation for over 100,000 years.
• Represents a strategic resolution to nuclear waste, supporting sustainable energy autonomy.

"Finland is set to operationalize 'Onkalo,' the world’s first permanent deep geological repository for spent nuclear fuel. Located in Eurajoki, the facility utilizes the extreme geological stability of 1.9-billion-year-old Fennoscandian bedrock. Spent fuel rods are encapsulated in copper and cast iron, then deposited 450 meters underground to ensure isolation for over 100,000 years. This development serves as a critical milestone for European energy sovereignty, providing a definitive solution to the long-standing nuclear waste disposal challenge. Onkalo is widely regarded as the global benchmark for safety, engineering integrity, and long-term environmental stewardship within the nuclear industry."