Thermal behaviour of CANDU type fuel rods during steady state and transient operating conditions

In-core measurements on fuel rods thermal behaviour during steady-state as well as tran- sient power conditions are presented. Based on these data, the in¯uence of filling gas, linear power and burnup on CANDU-type fuel center temperature evolution are discussed. Thermal behaviour characteristics up to ~69 MWh/kgU of helium and xenon prefilled fuel rods instrumented with centerline thermocouples are analysed