The CT studies performed thus far in the RAS division have been based on neutron radiographs of two 7-pin reactor fuel bundles which were subjected to over-power accident simulations in the TREAT reactor. The tests as referenced below were named LO5 and LO6. As a result of the tests, the pins were severely damaged, with molten fuel and steel spreading throughout the fuel assembly. After removal of parts of the test vehicle, the remaining assembly is approximately 2-m long, and about 10-cm diameter.