In 1974, the SNAP 8 Experimental Reactor (S8ER) Facility at the Santa Susana Field Laboratories (SSFL) of the Energy Systems Group (ESG) of Rockwell International was declared excess to the government's program needs. The resulting decommissioning program, commenced in 1976, provided for complete t removal of all radioactive materials remaining from the operation of two SNAP space-type compact reactors.