NASA’s Glenn Research Center is playing a significant role in the development and safe operation of the International Space Station (ISS). Glenn's contributions involve several tasks that support key flight hardware including the design, development and operations of the Electrical Power System (EPS), Plasma Contactor Unit (PCU) system, and Photovoltaic Thermal Control System (PVTCS). Glenn also provides support for the analysis activities of the ISS Environments Team and investigates safety issues to promote propulsion system safety.