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This report presents the proceedings of the third and final joint EC-CEA workshop of the OKLO-Natural Analogue - Phase II held in Cadarache, France on 20 and 21 May 1999.

The OKLO uranium ore deposit is the only known place on earth where two billion years ago self-sustained fission reactions took place in natural nuclear reactors. Since then the resulting fission products have been partially retained in the surrounding geological environment. The OKLO site is therefore considered as a natural analogue of a waste disposal system and is subject to worldwide research activities within: the international OKLO working group and the EC-OKLO-Natural analogue project.

This workshop is the follow-up to six previous workshops held on the OKLO subject during Phase I and II of the EC project. Five of them have been published as a series (EUR 14877, EUR 16098, EUR 18314, and EUR 19116).

The objectives of research carried out at OKLO and Bagombe sites are to test models of processes related to radionuclide migration/retention, which are of importance in the assessment of performance of future underground radioactive waste disposal systems and to improve the understanding of the confinement capacity of geological environments.

This report consists of the 25 papers presented at the workshop, which describe the status of research activities at OKLO from both participants in the EC project: 'OKLO-Natural Analogue - Phase II: Behaviour of nuclear reaction products in a natural environment and from scientists within the international OKLO working group. group.

Additional information

Authors: MICHAUD V, CEA-Cadarache (FR);LOUVAT D, CEA-Cadarache (FR);VON MARAVIC H, European Commission, Brussels (BE)
Bibliographic Reference: EUR 19137 EN (2000), 426pp.
Availability: Available from EUR-OP Sales agents
ISBN: ISBN 92-828-9220-4
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