Fort St. Vrain Nuclear Generating Station was located in Platteville, Colorado approximately 30 miles southeast of Fort Collins, Colorado. The General Atomics high-temperature gas-cooled reactor (HTGR) was operated by Public Service Company of Colorado. The plant was shutdown in August 1989. Decommissioning began in November 1989 and was completed in February 1995. Subsequently the plant was converted to operate as a natural gas combustion turbine and has been operating since May 1996.
All the SNF from Fort St. Vrain is owed by the U.S. Department of Energy (DOE), and it is stored to two locations. An unknown number of SNF assemblies were shipped to DOE’s Idaho National Laboratory until October 1991. The remaining 1,464 SNF assemblies (15 metric tons) were placed in an onsite ISFSI between December 1991 and June 1992 pursuant to a site-specific license. The ISFSI is a modular dry vault storage (MDVS) system specifically designed for the HTGR fuel by Foster Wheeler. The ISFSI is a concrete and steel building (as opposed to a concrete storage pad), and the SNF is stored inside the building. The building is surrounded by a security fence and an additional security perimeter, and located approximately 1,400 feet north-northeast of the currently operating plant site.
Additional information regarding Fort St. Vrain can be found at the following websites: