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Abstract

The OKLO-natural analogue phase II project had three main objectives: 1) to assess radionuclide migration/retention processes from the reactor zones to the geological environment; 2) to define the confinement properties and long-term behaviour of geological materials; 3) to test models of processes related to radionuclie migration/retention using dat from a well-constrained natural system based on a relevant framework of space and time and eventually to provide suitable data and scenarios for performance assessment. This project brought useful information or tools for the evaluation of perfomance assessment of waste disposal, waste-form conception or long-term behaviour. The main outputs are: relevant questions about the long-term evolution of spent fuel, ie the possible occurance of a coffinitisation process, measurement of short-term leaching rates of OKLO uraninate with a simplified kinetic model; modelling tools and data that may be used to rank and describe quantitatively the interaction of uranium and REEs with a complex clayey material; important clues on radionuclide trapping in generic mineral phases or specific secondary minerals; and a consistent understanding of redox buffering in a clayey environment, from deep surface to conditions.

Additional information

Authors: CNRS (FR), ;ENSMP (FR), ;CEA (FR), ;CIEMAT (ES), ;QUANTISCI SL (ES),
Bibliographic Reference: EUR 19139 EN (2000), 116pp.
Availability: Available from EUR-OP sales agents
ISBN: ISBN 92-828-9030-9
Record Number: 200011924 / Last updated on: 2000-04-22
Category: PUBLICATION
Original language: en
Available languages: en
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