Finland Is Building A Cave Located 430 Meters Deep To Store Nuclear Waste For 100,000 Years. Meet Onkalo

Written by Ruth Rodrigues

Published on 01/04/2025 at 19:49

Fonte: Mega curioso

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With a project aimed at ensuring safety for more than 100,000 years, Onkalo represents a breakthrough in nuclear waste management, protecting the environment and future generations from the risks of radioactivity.

Finland is about to inaugurate one of the most ambitious and revolutionary projects in the history of nuclear energy. This is Onkalo, an underground cavern designed to store nuclear waste for more than 100,000 years.

Located on the island of Olkiluoto, on the west coast of Finland, this unique structure in the world represents a milestone in the management of radioactive waste. With an inauguration scheduled for 2026, Onkalo promises to be the definitive solution to the challenges posed by Finnish nuclear waste.

The Onkalo Project

The word “Onkalo” means “cavity” or “hiding place” in Finnish, an appropriate description for this impressive nuclear cavern. The project is located 430 meters deep in a rocky bed, where the radioactive waste from Finland’s nuclear plants will be stored.

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The Importance of the Onkalo Nuclear Cavern

The storage of nuclear waste is one of the greatest challenges of nuclear energy. Although it is considered a cleaner alternative compared to fossil fuels, nuclear energy generates highly dangerous radioactive waste.

The Onkalo nuclear cavern represents an innovative solution, providing a safe and isolated space for high-level radioactive waste, which can take thousands of years to lose its radioactivity potential.

Nuclear waste is classified into three categories: low, intermediate, and high-level radioactivity. While the majority (90%) consists of low-risk materials, such as contaminated clothing and tools, the high-level fraction, although it represents only 3% of the total, carries 99% of the radioactivity.

According to the Nuclear Energy Agency (NEA), high-level waste takes about 10,000 years to reach a radioactivity level comparable to that of the original ore from which it was extracted.

The Signage Dilemma

One of the major challenges of the Onkalo nuclear cavern is ensuring that future civilizations understand the dangers buried there. How to signal the risks of Onkalo thousands of years from now, when we do not know what language will be spoken or if humanity will still exist?

Among the proposed solutions, one of the more radical involves creating a hostile landscape around the nuclear cavern, making the area inhospitable and frightening. Another curious idea suggests genetically engineering cats that would change color upon detecting radiation, creating a lasting legend about “signaling cats” to alert people to danger.

In the short term, Onkalo will feature standardized signage to indicate the presence of radioactive material. However, the future of risk communication in Onkalo remains an enigma to be solved.

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Finland Is Building A Cave Located 430 Meters Deep To Store Nuclear Waste For 100,000 Years. Meet Onkalo

With a project aimed at ensuring safety for more than 100,000 years, Onkalo represents a breakthrough in nuclear waste management, protecting the environment and future generations from the risks of radioactivity.

The Onkalo Project

The Importance of the Onkalo Nuclear Cavern

The Signage Dilemma

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Finland Is Building A Cave Located 430 Meters Deep To Store Nuclear Waste For 100,000 Years. Meet Onkalo

With a project aimed at ensuring safety for more than 100,000 years, Onkalo represents a breakthrough in nuclear waste management, protecting the environment and future generations from the risks of radioactivity.

The Onkalo Project

The Importance of the Onkalo Nuclear Cavern

The Signage Dilemma

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

He transformed an abandoned plastic water tank into an underground house in the “hobbit hole” style, using only repurposed pallet wood, without heavy machinery or expensive labor.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Toyota launches “family hybrid van” with 7 or 8 seats, 1.8 hybrid engine, fuel consumption of up to 23.8 km/l, and a price equivalent to about R$ 104,000 without taxes, below the Tiggo 8 Pro Plug-in Hybrid sold in Brazil: meet the Noah Hybrid 2026 in Japan.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

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