Ákos Horváth: Natural nuclear reactor in an African uranium mine (Atomcsill, 2021.11.11.)

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ELTE Atomcsill

Published on Nov 19, 2021
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Speaker: Ákos Horváth (ELTE TTK, Department of Atomic Physics) Title: Natural nuclear reactor in an African uranium mine Date: 2021.11.11. Abstract: In the uranium mine near Oklo in Gabon, it was discovered in 1972 that the ratio of the 235U and 238U isotopes is lower than the universal isotope frequency ratio usual in uranium ores. The explanation for the anomaly is that about 2 billion years ago, a natural nuclear reactor cooled and moderated by running water started up in the mine, which operated intermittently for about 800 thousand years, consuming part of the fissionable 235U isotope. The theory was also supported by the anomalous isotope frequency of the fission products. Could a similar natural nuclear reactor have operated in other parts of the Earth, and could a similar phenomenon occur today? An extra scientific curiosity is that this event that took place in the distant past also provides information about the possible temporal changes in physical constants. The examination of the radioactive products left in place after fission provides information about the geological behavior of radioactive waste. Further information: http://atomcsill.elte.hu/NEW/events/t...

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