HKNIC - More about managing nuclear waste
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More about managing nuclear waste
The nuclear waste left at the natural reactors at Oklo

Nowadays, stable descendants of fission products and plutonium were left behind at natural “reactors” at Oklo in Gabon, West Africa, after the uranium 235 in the uranium ore bodies was consumed by a naturally occuring nuclear chain reaction some 1.7 billion years ago. It was observed that these products never moved more than several metres from where they began. These descendants were contained in their parent sedimentary rocks and were not dissolved or carried away by ground water. This natural phenomenon is evidence that products of nuclear fission can be kept isolated for a very long geological period.