Oklo
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A prehistoric natural "nuclear reactor",
which was in operation about 2 bn years ago, was discovered in the uranium
deposit Oklo/Gabon in 1972. In past years, six further locations in
this deposit were found where a self-perpetuating chain reaction must
have taken place due to the reduced U-235 content in the natural uranium.
For the Oklo II location, it can be calculated from the depletion of
uranium-235 entailed by fission that a minimum of 4 t U-235 must have
been fissioned, 1 t Pu-239 formed, and a volume of heat of about 100
bn kWh generated. As a comparison: in the reactor of a nuclear power
plant of the 1,300 MWe category, about 30 bn kWh heat is generated by
fission annually.
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11 - 15 March 2018
Munich, Germany
30 September - 04 October 2018
Prague, Czech Republic |
