S3G Nuclear Submarine Prototype
The S3G Nuclear Submarine Prototype training is located on the Kesselring Site in West Milton, New York, approximately 17 miles north of Schenectady. The S3G Prototype reactor plant first started operation in 1958, and served for more than 30 years as a facility for testing reactor plant components and equipment and for training Naval personnel.
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.
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