The big generator repair was the topic this episode and it's a major failure of the show runners and writers to not hire any or even better tech advisors and engineers. The turbine generator is just art director ridiculous and eyes roll. The entire silo concept would have had more logical engineering systems when built by the Founders 140 years earlier. You can think of the silo as a 10,000 passenger cruise ship or submarine and would need to be a self-contained habitat with multiple tech redundancies. Ok maybe there's a clue to what it all is when one character explains the steam comes from "somewhere". James Cameron for example does a great job in adding real tech into his sci fi films, even non-engineers can sense the added realism and possibilities. The Silo team appear to know steam is hot and saw a cutaway drawing of a turbine and then built a story around those two. It was good drama and tension though to get the repair completed.