本研究針對汽輪發電機的運作流程，運用初步危險分析法識別出運作中可能發生的危險共七項，其中最嚴重的危險因素是「slop drain pipe破裂」與「爐管破裂」，這兩項危險因素會導致發電機中斷運作，甚至釀成巨災。對此，本研究提出三種解決方法，分別為「加裝固定U型螺栓」、「加入化學藥劑至冷凝水中」和「設置除氧器」；經評估，雖以「加裝固定U型螺栓」的成效最佳，但如果可以搭配「加入化學藥劑至冷凝水中」和「設置除氧器」，更能降低汽輪發電機運作中發生事故的機率。

This study focuses on the operation process of steam turbine generator by using the Preliminary Hazard Analysis to identify the possible hazards. The results of this study show that there are seven risk factors in the operation process. However, the most serious risk factors are the broken slop drain pipe and furnace pipeline. These risk factors will cause the generator shut down. Thus, three solutions are proposed as follows: (1) Install the fixed U-bolts; (2) Add chemicals to the cooling water; (3) Install the deaerator. After evaluating these alternatives, installing the fixed U-bolts is the most effective way. Besides, adding chemicals to the cooling water and installing the deaerator simultaneously can significantly reduce the possible accidents in the process of operating steam turbine generator.