Skip to Main content Skip to Navigation
Journal articles

A new phenomenological criterion for pellet-cladding interaction rupture

Abstract : This study is concerned with structural integrity assessment of Pressure Water Reactor's (PWR) fuel rods under pellet-cladding interaction (PCI) loading condition. An important experimental and research cooperative program between EDF, AREVA-NP and the Atomic Energy Commission CEA is achieved in order to get a better understanding of the mechanisms possibly leading to PCI failure, as well as to qualify a PCI resistant rod design. The objectives of this work are: first, to improve the understanding of the pellet mechanical properties impact on cladding local loading with 3D simulations results, and second, to propose a new phenomenological rupture criterion for a better assessment of the failure risk. In this study fuel behaviour modelling under nominal and transient loading conditions is achieved with a multi-dimensional simulation tool called ALCYONE, included in the new fuel software PLEIADES currently co-developed by the CEA and EDF. Cladding loading due to mechanical interaction during power transient stage is first analysed through pellet-cladding interfacial stresses computed in the 3D simulation. Then, a 2D model is proposed in order to establish a correlation between interfacial loading and stress concentration in the cladding. In order to assess the failure risk under PCI a phenomenological criterion based on the membrane circumferential stress in the cladding and shear stresses at pellet-cladding interface is proposed. To compute the shear loading at pellet-cladding interface a new parameter (called $W_{r \theta}$) is introduced. Based on 3D calculations of PCI, it is shown in this paper that pellet fracture properties can have a significant effect on PCI loading.
Document type :
Journal articles
Complete list of metadata

Cited literature [17 references]  Display  Hide  Download
Contributor : Bibliothèque CADARACHE Connect in order to contact the contributor
Submitted on : Monday, March 23, 2020 - 9:30:41 AM
Last modification on : Wednesday, May 27, 2020 - 3:22:57 AM
Long-term archiving on: : Wednesday, June 24, 2020 - 1:00:45 PM


Files produced by the author(s)





B. Michel, J. Sercombe, G. Thouvenin. A new phenomenological criterion for pellet-cladding interaction rupture. Nuclear Engineering and Design, Elsevier, 2008, 238 (7), pp.1612-1628. ⟨10.1016/j.nucengdes.2008.01.012⟩. ⟨cea-02514885⟩



Record views


Files downloads