Geochemical Characteristics of an Ancient Nuclear Reactor “Oklo”

• Hidaka H.

  Department of Earth and Planetary Systems Science, Hiroshima University

Bibliographic Information

Other Title

• Geochemical Characteristics of an Ancient Nuclear Reactor ^|^ldquo;Oklo^|^rdquo;

Abstract

The Oklo uranium deposit at the Republic of Gabon, central Africa, had partly functioned as natural fission reac-tors. Many elements of the Oklo reactor zones and the related samples show the variations in the isotopic compo-sition caused by a combination of nuclear fission, neutron capture, and radioactive decay. Isotopic studies provide useful information to estimate reactor conditions and to understand behavior of radionuclides in geological media. In my recent work, in-situ REE, Pb, and U isotopic analyses of individual tiny minerals in and around reactor zones have been performed using a Sensitive High Resolution Ion Micro-Probe (SHRIMP). The data suggest the adsorption property of apatite in trapping fissiogenic LREE and Pu migrated from the reactor zone, and distribution of fissiogenic REE under oxidizing atmosphere.

Journal

• Journal of Nuclear and Radiochemical Sciences

  Journal of Nuclear and Radiochemical Sciences 8 (2), 99-103, 2007

  The Japan Society of Nuclear and Radiochemical Sciences

Details

• CRID: 1390282679457477248
• NII Article ID: 10021102008
• NII Book ID: AA11948402
• DOI: 10.14494/jnrs2000.8.99
• COI: 1:CAS:528:DC%2BD2sXhsVCgtb3L
• ISSN: 18835813
• ISSN: 13454749
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed