As a result of the end of the Cold War and the downsizing of the Navy, the S3G Prototype reactor plant was shut down in May 1991. Since then, the S3G Prototype reactor plant has been defueled [a process that was completed in 1995], drained, and placed in a stable protective storage condition.
The Kesselring Site will not be released for other uses in the foreseeable future since two active prototype reactor plants continue to operate to perform training of US Navy personnel and testing of Naval nuclear propulsion plant equipment.