Lockheed Martin Energy Research Corporation (LMER) contracted NAC to design a system for packaging and transporting transuranic Californium from the Oak Ridge National Laboratory (ORNL) in Tennessee to U.S. and international customers.

The neutron shielding requirements for Californium, which is used as a reactor startup source and in industrial and medical applications, greatly exceed those for commercial spent fuel.

NAC designed an economical cask called the NAC-CTS (Californium Transport System) to meet these requirements. The cask is a right-cylindrical design, with truncated cone-shaped ends. The design also called for special high-performance, fire-resistant neutron shielding materials.