Monticello Nuclear Generating Plant Unit 1 is located in Monticello, Minnesota approximately 35 miles northwest of Minneapolis, Minnesota. The General Electric BWR is operated by Northern States Power Company and owned by Xcel Energy Inc. The unit is licensed to operated until September 9, 2030. The fuel pool can hold up to 2,209 SNF assemblies; however, 1,058 SNF assemblies were shipped to the General Electric fuel pool in Morris, Illinois is the mid 1980s.
The ISFSI for Monticello began accepting SNF for storage in the fall of 2008 pursuant to a general license. The ISFSI is approximately 460 feet long by 200 feet wide, adjacent to the reactor and turbine buildings, and can accommodate 30 casks on an existing concrete storage pad. The physical space can accommodate another 35 casks on a second concrete storage pad. The ISFSI also contains a small concrete building that houses electrical equipment. As of January 2009, there were 610 SNF assemblies stored in 10 dry casks (the photo shows 12 spaces). The casks are manufactured by Transnuclear — the NUHOMS cask system and the 61BT canister type. As of the end of 2010, there was 1,160 metric tons of SNF stored at the two nuclear power plant sites located in the State of Minnesota — Monticello and Prairie Island.