Analysis of LOCA safety criteria in high burn-up nuclear fuel cladding

According to the trend toward high burn-up nuclear fuel, it is issued recently that whether current LOCA criteria are also applicable to high burn-up nuclear fuel cladding or not. The real behaviors of high burn-up nuclear fuel cladding under LOCA are estimated and the main issues are analysed as follows. Whether oxidation during the normal operation should be inclusive in ECR calculation or not. The hydrogen effects on ductility of cladding on quenching. Applicability of Niobium-containing high burn-up nuclear fuel cladding to urrent LOCA criteria. Acceleration of steam oxidation kinetics under high pressure steam