b'How many reactors do youhave out there?W e have built 52 reactors on the Arco desert. Its the largest complex of reactors in the world. Most of them have been decommissioned and torn down after accomplishing nuclear energy research missions. The Department currently has six operating reactors in its fleet; four of which are located at INL today. These include the Advanced Test Reactor (ATR), the ATR Critical Facility, the Neutron Radiography Reactor (NRAD), and the Transient Reactor Test (TREAT) Facility.'