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[en] Studies of methodological nature have been made on three types of aquifers. The first, a non-confined aquifer, is situated in southern France on the left bank of the Rhône in the Crauz plain. Tritium, carbon-14 and uranium were used together with the routine chemical analyses of water. The second aquifer is situated to the east and southeast of Paris, in a rather peculiar formation. The aquifer is confined in some places and non-confined in others; it is typically karstic at some places. The situation is complicated and the results of carbon-14 and tritium are both very interesting and useful. The third aquifer is the great sedimentary basin of Aquitaine. It is confined and has depths ranging between 100 and 550 meters.
[en] Overview of the French program, in which the proposed fast reactor fully absorb the Plutonium produced by the reactors heat until 1978. However, problems concering U Pu elemtents, namely performance, manufacturing costs and reprocessing have been studied in France. For the moment a program for recycling plutonium in thermal reactors is premature.
[fr]Dans le programme français, les réacteurs rapides envisagés absorbent complètement le Plutonium produit par les réacteurs thermiques jusqu'en 1976. Néanmoins les problèmes concernant les éléments U Pu, à savoir les performances, les eôuts de fabrication et de retraitement ont été étudié en France. Si le recyclage du Plutonium s'arivait économiquement intéressant, l'expérience obtenue, nois permettrait d'entrependre rapidement cette opération. Pour le moment un programme de recylage du Plutonium dans les réacteurs thermiques est prématuré.
[en] As a consequence of the French system of organization, the same persons are in charge of the treatment of accidents involving internal contamination and of experimental research into radiation toxicology. This fact explains the direction taken by experimental studies. In the event of a contamination accident, two practical questions arise and require rapid answers. The first is diagnostic in nature: what is the extent of the contaminate n at the point of entry; what fraction has already diffused in the organism or may do so in such and such a time? The second is the choice of possible therapeutic action and the decision whether or not to initiate such action.