| dc.description.abstract | The 2011 Fukushima Daiichi nuclear accident led to the destruction of three BWR cores and containment buildings. Despite the negative outcomes of this incident, the RCIC system for both Unit 2 and Unit 3 operated in harsher conditions, and for longer durations, than previously believed possible. The Terry Steam Turbine, which powers the RCIC system, is believed to have operated with oil temperatures higher than currently accepted limits spurning an investigation into bearing durability. Initial work in this collaboration demonstrated how Mobil DTE-732 Light Turbine Oil could withstand higher temperatures than the commercial nuclear power industry limits (71.1 °C, 160 °F), and did not significantly alter the performance or condition of ZS-1 Terry Turbine bearings when heated during operation. This thesis investigates how the full-scale G-series Terry Turbines, with softer Babbitt bearings, would behave based on oil temperature, while also simulating operation conditions experienced by the RCIC system in commercial nuclear power applications. Tests were conducted on the bearings of a GS-2 Terry Turbine to quantitatively record changes in physical parameters during operation based on lubricating oil temperature, while also qualitatively inspecting the bearings for damage. Results showed an increase in bearing temperature and decrease in shaft torque as oil temperature increased but did not significantly alter the operation of the turbine. Additionally, minor wear was observed on the bottom bearings of both sides of the turbine, but it is believed to be independent of oil temperature. | en |
