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DEVELOPMENT OF A SELF-CONTAINED DRILL-HOLE CHROMOTOGRAPHIC PROBE.

Ziel

THE STUDY OF THE TRANSURANIAN NUCLIDE MIGRATION FROM RADIOACTIVE WASTE STORAGE PLACES IS BASED ON THE KNOWLEDGE OF THE NATURAL ENVIRONMENT AND, IN PARTICULAR, OF THE CHEMICAL COMPOSITION OF THE WATER : THE TRANSFER VECTOR.

IN ADDITION TO MAJOR ELEMENTS, THE WATER ALSO CONTAINS TRACE ELEMENTS WHICH PLAY A PROMINENT PART NOT ONLY ON THE GENERAL EQUILIBRIUM, BUT ALSO ON THE RADIONUCLIDE MIGRATION POSSIBILITY.

THIS IS IN PARTICULAR THE CASE OF THE LANTHANIDES, PRESENT IN THE GRANITIC AND ARGILLACEOUS ENVIRONMENTS, WHOSE ROLE OF SORPTION COMPETITORS WITH RESPECT TO THE ACTINIDES HAS BEEN EXHIBITED THROUGHOUT NUMEROUS EXPERIMENTS.

THE SCOPE OF THIS CONTRACT IS TO MANUFACTURE AND OPERATE A CHROMATOGRAPHIC PROBE TO BE USED IN A DEEP DRILL-HOLE, SO DESIGNED AS TO ACQUIRE A REPRESENTATIVE SAMPLE UNDER CONDITIONS OF EQUILIBRIUM OF THE NATURAL ENVIRONMENT, TO PRECONCENTRATE IT BY ELIMINATION OF THE SALINE CONTENT AND TO STORE IT FOR ULTERIOR ANALYSIS AT THE SURFACE.

B1. PROCESS DEVELOPMENT
B1.1. PRINCIPLE LAYING-DOWN AND DELINEATION. IN-LABORATORY MODEL.
B.1.2. DEFINITION OF FINAL PROBE DESIGN AFTER STUDY ON MODEL. REALIZATION AND ADJUSTMENT ON CADARACHE SITE.

B2. PROBE QUALIFICATION IN THE DEEP DRILL-HOLE OF AURIAT.
B3. APPLICATION TO 3 REFERENCE SITES.

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Commissariat à l'Energie Atomique (CEA)
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Centre d'Études de Cadarache Sere-Ders
13113 SAINT-PAUL-LEZ-DURANCE
Frankreich

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