JRP CALL information
Supported By

European Commission

Short description of the work
A series of different composition prototypical corium materials were synthesised at the JRC-ITU and Laser heated (and cooled) at controlled atmosphere simulating high temperature phase changes during severe accidents. In order to fully understand the behaviour of such materials, oxidation state, geometric and electronic structure data, X-ray methods available at ESRF were used to understand the local electronic structure (determined by EXAFS) and the chemical state (from XANES).
In addition, samples with Pu content typical of corium formed from a melted
MOX fuel was analysed in a similar manner.
In summary a total of 16 samples were measured over 4 days shift.
compositions included: 3xUO2 reference, melted under argon and in air;
3x U(0.5)Zr(0.5)O2 reference, melted under argon and in air; 3x U(0.2)Zr(0.8)O2 reference, melted under argon and in air; 2x U(0.6)Zr(0.4)O2 reference and melted in air; 2x U(0.8)Zr(0.2)O2 reference and melted in air; 3xU(0.44)Pu(0.08)Zr(0.48)O2 reference, melted under argon and in air.
For all samples Zr K and U L edge data were collected.

Main visitor contact data
Name: Emtethal Kassim
Organisation: JRC-ITU

JRP Identification
JRP nr: TALI-C04-05
JRP title: First Principles understanding of the local structure of lavas formed in nuclear reactor accidents
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:
Other APF involved in the project:

Description of the work done at the associated pooled facility
Start date of the stay: 6/19/2015
End date of the stay: 6/23/2015
Quantity of access: 4
Access Unit: Days

Other APF visitors of the JRP during the stay
Visitor 2: Dr Damien Prieur
Visitor 3: Dr Alice Seibert
Visitor 4: Sara Mastromarino