6533b835fe1ef96bd129f71c
RESEARCH PRODUCT
Micro-Raman analysis of the fuel-cladding interface in a high burnup PWR fuel rod
Frederic LeprêtreSandrine MiroIsabelle Zacharie-aubrunMichel MermouxSébastien ChevalierI. PopaL. FayetteK. HanifiGaëlle GutierrezClément Ciszaksubject
Nuclear and High Energy PhysicsMaterials science[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]Annealing (metallurgy)02 engineering and technology[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural scienceslaw.inventioncladdingTetragonal crystal systemsymbols.namesakelaw0103 physical sciencesGeneral Materials ScienceCubic zirconiaComposite materialBurnup010302 applied physicsNuclear fuelPressurized water reactorion irradiation021001 nanoscience & nanotechnologyNuclear Energy and EngineeringSpent fuelRaman spectroscopysymbols0210 nano-technologyRaman spectroscopyMonoclinic crystal systemNuclear chemistrydescription
International audience; New insights on the fuel-cladding bonding layer in high burnup nuclear fuel were obtained using micro-Raman spectroscopy. A specimen was specifically prepared from a fuel rod which had been irradiated to an average burnup of 56 GWd.tU-1 in a pressurized water reactor (PWR). Both inner and outer corrosion scale regions were investigated. A 10-15 et956;m thick zirconia bonding layer between fuel and cladding materials which consisted of three distinct regions was observed. Close to the fuel, tetragonal, then monoclinic zirconia was identified as the main phases. Close to the bonding layer-cladding interface, peculiar Raman signals were observed. Similar signals were obtained for the outer zirconia scale at the metal oxide interface, and for ion-irradiated zirconia scales grown on Zircaloy-4. Phase transitions from monoclinic to tetragonal ZrO2 are tentatively discussed in connection with irradiation damages, chemical doping, annealing, mechanical stresses and defects in the oxygen sub-lattices.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-11-01 |