This paper investigates the following questions related to the potential role that clean hydrogen can play in decarbonizing the power sector: 1. Is burning hydrogen in power plants technically feasible? 2. What infrastructure is required to use hydrogen in the power sector and what could that infrastructure cost? 3. Does burning low-carbon hydrogen reduce lifecycle greenhouse gas emissions from power plants? 4. What are the economics of using lowcarbon hydrogen in the power sector and how does it compare to alternative technologies?