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Originally posted by Hanslune
The natural nuclear reactor formed when a uranium-rich mineral deposit became inundated with groundwater that acted as a neutron moderator, and a nuclear chain reaction took place.
Originally posted by Hanslune
As I understand the article to say, the enrichment of Uranium was greater 1.7 billion years ago and fission was possible without enrichment. Now days due to radioactive loss Uranium has to be enriched.
Originally posted by Hanslune
It makes perfect sense, once water was added to material that was already naturally enriched the reactions took off, stopped, and started again as water came in.
Could some force have been involved? Perhaps but I think you're confusing the gun type nuclear bomb explosion technique for fission for power.