Operators removed Three Mile Island Unit 1 from service Wednesday to repair an electrical component that powers one of the unit’s control rods. This repair cannot be performed while the plant is generating electricity.

During the course of shutting down the plant, a valve opened allowing steam to be released to the atmosphere. The steam release was audible to nearby residents.

Three Mile Island Generating Station is located approximately 12 miles south of Harrisburg. The plant generates enough carbon-free electricity for 800,000 homes.

5/11/2015