DescriptionAEC-70-8974 TEST FACILITY. . .One of the principal, facilities at the Atomic Energy Commission’s Liquid Metal Engineering Center (LMEC) is this Large Component Test Loop for thermal shock testing of sodium components, small valves, equipment and instruments for the liquid metal fast breeder reactor program. Atomics International a division of North American Rockwell operates the Center at its Santa Susana Nuclear Field Laboratory. Credit: Atomics International