Nuclear Power Plants in Missouri Callaway Plant, Unit 1 PRESSURIZED WATER REACTOR Location:  25 MI ENE of Jefferson City, MO Docket Number:  050-00483 Operating License:  Issued - 10/18/1984, Expires - 10/18/2024 Operator:  Union Electric Co. Electrical Output:  1236 MWe Reactor Vendor/Type:  Westinghouse Four-Loop Containment Type:  Dry, Ambient Pressure Click here for more information