4.7 Article

Micro-Raman analysis of the fuel-cladding interface in a high burnup PWR fuel rod

Journal

JOURNAL OF NUCLEAR MATERIALS
Volume 495, Issue -, Pages 392-404

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2017.08.038

Keywords

Spent fuel; Cladding; Ion-irradiation; Raman spectroscopy

Funding

  1. EDF
  2. AREVA NP

Ask authors/readers for more resources

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 cladded Zircaloy-4 fuel rod which had been irradiated to an average burnup of 58.7 GWd.t(U)(-1) in a pressurized water reactor (PWR). Both inner and outer corrosion regions were investigated. A 10-15 mm 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 were 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. (C) 2017 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available