SYMPOSIA PAPER Published: 01 January 1984
STP34504S

Deformation and Failure of Zircaloy Fuel Sheaths Under LOCA Conditions

Source

A unified, microstructural creep law which simulates the transient creep deformation of Zircaloy at temperatures above 750 K has been used to follow the interaction of diffusional and dislocation creep with changes in material microstructure (grain size, recrystallization, phase fraction and anisotropy) under loss-of-coolant accident (LOCA) conditions. Comparison of a membrane sheath model using this creep law with a large number of tube tests (>700) in an inert environment has demonstrated good predictive capability.

This model has been extended to cover other aspects affecting deformation and failure of CANDU (CANada Deuterium Uranium) fuel sheaths such as: nonuniform structure distribution resulting from temperature profiles along the sheath length, oxidation of the fuel sheaths, cracking of the oxidized layers and localized straining, large strain failure, and failure by beryllium-assisted cracking.

Author Information

Sagat, S
Fuel Engineering Branch, Atomic Energy of Canada Ltd., Chalk River Nuclear Laboratories, Chalk River, Ont., Canada
Sills, HE
Fuel Engineering Branch, Atomic Energy of Canada Ltd., Chalk River Nuclear Laboratories, Chalk River, Ont., Canada
Walsworth, JA
Fuel Engineering Branch, Atomic Energy of Canada Ltd., Chalk River Nuclear Laboratories, Chalk River, Ont., Canada
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: B10
Pages: 709–733
DOI: 10.1520/STP34504S
ISBN-EB: 978-0-8031-4895-6
ISBN-13: 978-0-8031-0270-5