The MITR-II is a tank-type reactor, having in fact two tanks: an inner one for the light water coolant moderator and an outer one for the heavy water reflector. The fuel elements of uranium are positioned in a hexagonal core structure, 38 cm (15 inches) across, at the bottom of the core tank. Power is controlled by six shim blades and an automatic regulating rod. The pressure in the system is practically atmospheric, and the maximum temperature approximately 50 C (120 F). An exterior shield of dense concrete makes it possible for research workers and students to conduct experiments and training without radiation hazards. The MIT nuclear reactor contains a number of experimental facilities. There are more than 40 ports (horizontal and vertical) which penetrate the concrete shield and graphite reflector. Below the reactor is a shielded medical room for the use of a neutron beam in Boron Neutron Capture Therapy. A number of experimental facilities are installed in the graphite reflector, including pneumatic facilities for neutron activation analysis, and through ports for Neutron Transmutation Doping of Silicon. |
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