In 2009, CH2M HILL completed major deactivation activities at the Fast Flux Test Facility (FFTF), an achievement that helped DOE meet a major Tri-Party Agreement milestone (M-081-00A-T05). This was accomplished 21 months before the milestone's target date of Feb. 28, 2011.

Located in the 400 Area, FFTF was a national research facility and a setting for a wide variety of activities, including cooperative international research. It was best known for its 400-megawatt, sodium-cooled fast neutron flux nuclear test reactor. Reactor operations began in 1982. For a decade, it was used to test advanced nuclear fuels, materials and components in support of the national Liquid Metal Fast Breeder Reactor program; nuclear power plant operations and maintenance protocols; and reactor safety designs. A wide variety of medical and industrial isotopes were produced at the FFTF facilities, including tritium for the U.S. fusion research program.