S1C reactor

The S1C reactor was a naval prototype that combined steam turbines with generators to produce electric power for submarine propulsion. The system operated without mechanical reduction gears, representing an innovative approach to undersea vessel propulsion.

The facility was constructed in the 1950s and began operating as an active naval reactor complex from 1959 until 1993. During this period it served to train naval operators and supported United States Navy activities through the Cold War era.

The facility incorporated a structure named Castle Gray Skull, representing military engineering standards with specific disaster resistance capabilities.

The former reactor complex is located in Connecticut and is not open to the public, as it was a military facility. Visitors should check in advance for any available tours or informational centers in the area.

After decommissioning, this site received a notable certification as the first reactor location released without radiological and chemical restrictions. This achievement set a new standard for decontamination and safety practices in nuclear facilities.

GPS coordinates: 41.87919,-72.71738

Latest update: December 10, 2025 16:21