JRP CALL information
Supported By

European Commission

Short description of the work
During the nine shifts supplied, (U,Am)O2 transmutation target samples with an Am/(U+Am) ratio of 15% prepared using both ITU and CEA processes (green samples, some sintered at CEA, the other at ITU) were studied by XAS (X-ray absorption spectroscopy). XANES (X-ray absorption near edge structure) and EXAFS (extended X-ray absorption fine structure) spectra were recorded on all samples at both U and Am edges.
Analysis of the results will now be performed jointly by ITU and CEA. Coupled with XRD (X-ray diffraction) measurements, the results obtained will thus provide a comparison of the influence of the fabrication processes on both long-range and local structures, as well as on the oxidation states of the cations.

Main visitor contact data
Name: Florent Lebreton
Organisation: CEA Marcoule - DEN/DTEC/SDTC/LEMA + Université de Limoges

 

JRP Identification
JRP nr: TALI-C01-01
JRP title: Impact of synthesis process on homogeneity at atomic scale of (U,Am)O2-x samples (probed by XAS)
JRP scope: Scope 3: Actinide materials

Visited Associated Pooled Facility
Visited APF during the stay: HZDR - ROBL
Name of the APF Contact Person: Andreas C. Scheinost - Randolph Butzbach

Other APF and organisation involved in the JRP
Other organisations involved: JRC-ITU (Damien Prieur); CEA Cadarache - DEN/DEC/SESC/LLCC (Philippe Martin); Université de Limoges (Florent Lebreton); Université Montpellier 2 (Marie Caisso)
Other APF involved in the project:

Description of the work done at the associated pooled facility
Start date of the stay: 2/1/2014
End date of the stay: 2/4/2014
Quantity of access: 9
Access Unit: Shifts
Misc.: Work during week-ends
A publication of this comparison in a peer-reviewed journal is scheduled.

Other APF visitors of the JRP during the stay
Visitor 2: Dr Damien Prieur (JRC-ITU)
Visitor 3: Dr Philippe Martin (CEA Cadarache - DEN/DEC/SESC/LLCC)
Visitor 4: Marie Caisso (CEA Marcoule - DEN/DTEC/SDTC/LEMA + Université Montpellier 2)
Visitor 5: Dr Thibaud Delahaye (CEA Marcoule - DEN/DTEC/SDTC/LEMA)