JRP CALL information
Supported By

European Commission

Short description of the work
The samples described in the proposal could not have been measured in the framework of this call as an unexpected problem preventing the sample preparation occurred 2 weeks before the beamtime. For this reason, we measured several compounds in the Bi-U-O ternary system in the frame of the safety assessment of lead bismuth eutectic (LBE) cooled fast reactors.
Cubic fluorite-type phases have been reported in the UIVO2-Bi2O3 system for the entire compositional range, but a non-linear evolution of the lattice parameter with uranium substitution has been observed. In the current extensive investigation of the uranium(IV) oxide – bismuth (III) oxide system, the unusual behaviour of the lattice parameter evolution with composition has been confirmed and its origin identified. Even under inert atmosphere at 800 °C, UIV oxidises to UV/UVI as a function of the substitution degree. Thus, using a combination of three methods (XRD, XANES and Raman) we have identified the formation of the BiUVO4 and Bi2UVIO6 compounds, within this series..

Main visitor contact data
Name: Dr. Damien Prieur
Organisation: JRC-ITU

JRP Identification
JRP nr: TALI-C04-02
JRP title: Thermal recovery of self irradiation induced structural defects in transmutation fuels
JRP scope: Scope 3: Actinide materials

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

Other APF and organisation involved in the JRP
Other organisations involved: The samples described in the proposal could not have been measured in the framework of this call as an unexpected problem preventing the sample preparation occurred 2 weeks before the beamtime. For this reason, we measured several compounds in the Bi-U-O ternary system in the frame of the safety assessment of lead bismuth eutectic (LBE) cooled fast reactors. ; ; Cubic fluorite-type phases have been reported in the UIVO2-Bi2O3 system for the entire compositional range, but a non-linear evolution of the lattice parameter with uranium substitution has been observed. In the current extensive investigation of the uranium(IV) oxide – bismuth (III) oxide system, the unusual behaviour of the lattice parameter evolution with composition has been confirmed and its origin identified. Even under inert atmosphere at 800 °C, UIV oxidises to UV/UVI as a function of the substitution degree. Thus, using a combination of three methods (XRD, XANES and Raman) we have identified the formation of the BiUVO4 and Bi2UVIO6 compounds, within this series.
Other APF involved in the project: JRC-ITU - Labs & Hot-cells

Description of the work done at the associated pooled facility
Start date of the stay: 6/8/2015
End date of the stay: 6/11/2015
Quantity of access: 3
Access Unit: Days
Misc.:

Other APF visitors of the JRP during the stay
Visitor 2: Dr. Philippe Martin (CEA Cadarache)
Visitor 3: Dr. Karin Popa (JRC-ITU)