Extension and application of the TRANSURANUS code to the normal operating conditions of the MYRRHA reactor

This work deals with the performance analysis of MYRRHA hottest fuel pin in normal operating conditions, employing TRANSURANUS code, aim assessing current design specifications considering conservative limits. To allow proper simulation behaviour, is extended novel correlations for creep and void swelling response specific cladding material (DIN 1.4970). The best-estimate reference scenario complemented by a sensitivity on models describing phenomena properties, determining those which most affect results identifying worst-case scenarios. outcomes point out high level safety related to keeps far from any or critical limit, even challenging (worst-case)