Isolation and microscopic characterization of nuclear fuel particles from contaminated soil of Chernobyl.

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01/03/2000

Ahamdach, N; Stammose, D. COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES, 330: (6) 415-422.

Type de document > *Article de revue
Mots clés publication scientifique > déchets radioactifs : stockage de surface et sites pollués , microscopie , particules de combustible , Tchernobyl
Unité de recherche > IRSN/DEI/SARG/LETS
Auteurs > AHAMDACH Noureddine , STAMMOSE Denise

Nuclear fuel particles were separated from Chernobyl contaminated soil sample by sedimentation in bromoform. Their physicochemical characteristics were studied using the scanning electron microscope. One part of the particles contained U and O and the other part contained U: Zr and O. The size of the particles containing Zr was greater than that of the pure fuel particles. The structure and the surface morphology of the studied particles were variable and characterized the conditions of their formation. Thus, the source term is heterogeneous. This heterogeneity has direct consequences on the dissolution of the fuel particles.