Shielding is provided by 20 feet of demineralized water above the core, and, radially, by 1 foot of graphite reflector, 1.5 feet of water, and 6 feet of high density concrete. 85 elements arranged in 5 concentric rings. Secondary loop extraction through heat exchanger. A graphite column 4' x 4' x 8', extending outward from the core reflector and through the concrete shield structure, provides a source of well thermalized neutrons. A lead filter reduces the dose rate resulting from core gamma radiation.
Horizontal access is provided by a rolling door of heavy concrete mounted on a track.
The tangential port eliminates the direct core gammas from the beam and the sapphire crystal filters out fast neutrons and additional gammas to enhance the radiographic beam purity. The reactor core is located at the bottom of one end of the reactor pool. Large geometry experiments can be carried out by placing apparatus directly against the flat face of the graphite reflector on the open side of the pool. A wet central thimble extends from the pooltop down through the center of the core, giving access to the region of maximum neutron flux. The rabbit system is not currently on line, but could be made available upon request.