EXPERIMENT-BASED AND NUMERICAL ESTIMATION METHODOF DAMAGE DOSE FOR CLADDINGS OF FUEL RODS OPERATED IN THE VVER-1000 REACTORS
Described here are the results of niobium-94 gamma- radiation analysis for the specimens cut out from claddings of the VVER-1000 fuel rods and gadolinia fuel elements, which achieved a burnup of 15 MW·d/kg U to 77 MW·d/kg U. Specificactivity data of the specimens obtained experimentally were used as a basis to calculate attained damage dose and to find its dependence on burnup. Estimated here is also damage dose of the cladding attained within the gas plenum.