Sodium Fast Reactor Steam Generator Heat Exchanger Modal Analysis and Additional Mass Coefficient Calculation

The heat transfer tube of the steam generator (SG) of the sodium fast reactor (SFR) isolates the primary sodium from the secondary side water, whose integrity is very important for the safe operation of the reactor. Modal analysis is the key to engineering design. Three design criteria of GB/T151, ASME, and TEMA are adopted for calculation. Based on ANSYS finite element simulation, modal analysis of heat transfer tubes and additional mass coefficient of the liquid sodium flow field is calculated, which is verified by experiments. The results show that GB/T151 is most suitable for calculating the frequency of heat transfer tubes of the SFR steam generator. The numerical model and analysis method established in this paper can accurately carry out modal analysis and additional mass coefficient calculation of non-equal span tube-plate multi-support heat transfer tubes in different media, which lays a foundation for flow-induced vibration analysis of SFR heat exchanger equipment.