Saxton Nuclear Generating Station

The Saxton Nuclear Experiment Station, also known as the Saxton Nuclear Generating Station or Saxton Nuclear Experimental Corporation Facility, was a small nuclear power plant located in Bedford County, near Saxton, Pennsylvania.

The Saxton nuclear power plant was a small, light water, pressurized water reactor. The plant was sited immediately east of an existing coal fueled electricity generating plant, the 1923 Saxton Steam Generating Station, to share systems and components; the nuclear power plant did not have its own turbine or generator.

The nuclear reactor and associated systems were designed and constructed by Westinghouse Electric Corporation; nuclear fuel was likewise fabricated and supplied by Westinghouse from allocations of uranium-235 provided by the Atomic Energy Commission. The reactor coolant system contained a single loop of piping and components, including the reactor vessel, reactor coolant pump, pressurizer, and steam generator. Unlike some contemporary low pressure and low temperature pressurized water reactors (e.g. the Westinghouse TR-2), Saxton operated at pressures and temperatures typical of later commercial nuclear reactors; nominal reactor coolant system pressure was 2,250 psig and reactor vessel average temperature of 493 degrees Fahrenheit. As the facility was designed to perform testing and development functions, a superheated steam test loop was among the reactor's features. Additional equipment included process systems piping and components, a water filled spent fuel pool, and an overhead polar crane.

The reactor vessel and reactor coolant system were housed inside of a steel containment vessel. The steel containment vessel was a right cylinder topped by a hemispherical dome with an embedded semi-hemispherical lower head. The containment vessel was 109 feet tall by 50 feet in diameter. To provide radiological shielding and protection from environmental hazards, approximately 50 percent of the structure was below the surrounding grade. Underground tunnels connected the containment vessel and enclosed systems to other facilities and the adjacent steam plant.

The plant was located in a elbow of the Raystown Branch Juniata River, approximately 3/4 mile north of downtown Saxton.

The Saxton reactor was unique and notable in its early, routine use of mixed oxide fuels, use of fuel assemblies with different fuels together in the same core, and use of fuels with differing cladding materials. By way of example, the second core loading contained fuel assemblies of the following attributes:

The stainless steel, Zirconium, and Zirconium / stainless steel fuel rods were contained within cylindrical fuel "cans" fabricated of perforated stainless steel. The cans were in turn held in a 9 x 9 rod position matrix in fuel assemblies with a square cross section. Fuel assemblies included positions for control rods, instrumentation, and other inserts; fuel assemblies contained between 32 and 72 individual fuel rods. The Saxton core held a total of 21 fuel assemblies.

Construction began in February 1960 on the Saxton Nuclear Experimental Generating Station. The facility was privately financed. Westinghouse Electric Corporation designed and built the reactor. By the end of 1960, construction was about 35 percent complete. Construction was essentially complete in late 1961. The plant was connected to an existing turbine generator at the immediately adjacent Saxton Steam Generating Station of Pennsylvania Electric Company for production of electrical power.