The present report has been prepared by the Committee on the Safety of Nuclear Installations (CSNI) Working Group on Fuel Safety (WGFS) and covers the following technical aspects:
description of different LOCA scenarios for major types of reactors: BWRs, PWRs, VVERs and to a lesser extent CANDUs;
LOCA phenomena: ballooning, burst, oxidation, fuel relocation and possible fracture at quench;
details of high-temperature oxidation behaviour of various cladding materials;
metallurgical phase change, effect of hydrogen and oxygen on residual cladding ductility;
methods for LOCA testing, for example two-sided oxidation and ring compression for ductility, and integral quench test for strength;
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on 2/1/22 at 4:21 PM
