Understanding Neutron Radiography

Another reactor that has provided neutron radiography services since 1968 is
illustrated in Fig. 6. It is above ground and the fuel of the 100 kW core is
arranged in an annulus with a moderator region in the center.
Two horizontal beams are extracted from the central moderator, one for direct
film neutron radiography of nonradioactive objects, the other for dysprosium
activation transfer neutron radiography of radioactive nuclear fuel.
Another service for static neutron radiography of radioactive nuclear fuel has
been provided by a 250 kW nuclear reactor installed in a hot cell complex (Fig.
7). Also several university reactors in the United States have been equipped
for neutron radiography. Worldwide, over fifty nuclear reactors have
contributed to development of this field.
Charlie Chong/ Fion Zhang