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We Thought the Crater of Runit Sealed Under Its Concrete Dome: Its Bottom Never Received Any Layer of Sealing

Summary by SciencePost
The concrete dome of the Runit crater had to permanently seal the radioactive waste of the Enewetak atoll. However, since its construction in 1980, the porous bottom of the crater has never been sealed, allowing seawater to penetrate contaminated sediments. With the rise of water and the widening of cracks, this design flaw becomes a time bomb for the Pacific Ocean. More
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The concrete dome of the Runit crater had to permanently seal the radioactive waste of the Enewetak atoll. However, since its construction in 1980, the porous bottom of the crater has never been sealed, allowing seawater to penetrate contaminated sediments. With the rise of water and the widening of cracks, this design flaw becomes a time bomb for the Pacific Ocean. More

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SciencePost broke the news on Wednesday, August 5, 2026.
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