The Santa Susana Field Laboratory is a complex of industrial research and development facilities sparsely situated within a 2,668 acre[1] portion of the Southern California Simi Hills in eastern Ventura County California used mainly for the testing and development of Liquid-propellant rocket engines for the United States space program from 1949 to 2006,[1] nuclear reactors from 1953 to 1980 and the operation of a U.S. Government-sponsored liquid metals research center from 1966 to 1998.[2]
Throughout the years, approximately ten low-power nuclear reactors operated at SSFL, in addition to several “critical facilities”: a sodium burn pit in which sodium-coated objects were burned in an open pit; a plutonium fuel fabrication facility; a uranium carbide fuel fabrication facility; and purportedly the largest “Hot Lab” facility in the United States at the time. (A Hot Lab is a facility used for remotely cutting up irradiated nuclear fuel.) Irradiated nuclear fuel from other Atomic Energy Commission (AEC) and Department of Energy (DOE) facilities from around the country were shipped to SSFL to be decladded and examined.
The Hot Lab suffered a number of fires involving radioactive materials. For example, in 1957, a fire in the Hot Cell “got out of control and … massive contamination” resulted. (see: NAA-SR-1941, Sodium Graphite Reactor, Quarterly Progress Report, January-March 1957). Another radioactive fire occurred in 1971, involving combustible primary reactor coolant (NaK) contaminated with mixed fission products. (see: Rockwell International, Nuclear Operations at Rockwell’s Santa Susana Field Laboratory — A Factual Perspective, September 6, 1991).
At least four of the ten nuclear reactors suffered accidents. The AE6 reactor experienced a release of fission gases in March 1959, the SRE experienced a power excursion and partial meltdown in July 1959; the SNAP8ER in 1964 experienced damage to 80% of its fuel; and the SNAP8DR in 1969 experienced similar damage to one-third of its fuel. (see “Reactor accident sources” below).
The reactors located on the grounds of SSFL were considered experimental, and therefore had no containment structures. Reactors and highly radioactive components were housed without the large concrete domes that surround modern power reactors.
The sodium burn pit, an open-air pit for cleaning sodium-contaminated components, was also contaminated when radioactively and chemically-contaminated items were burned in it, in contravention of safety requirements. In an article in the Ventura County Star, James Palmer, a former SSFL worker was interviewed. The article notes that “of the 27 men on Palmer’s crew, 22 died of cancers.” On some nights Palmer returned home from work and kissed “his [wife] hello, only to burn her lips with the chemicals he had breathed at work.” The report also noted that “During their breaks, Palmer’s crew would fish in one of three ponds … The men would use a solution that was 90 percent hydrogen peroxide to neutralize the contamination. Sometimes, the water was so polluted it bubbled. The fish died off.”
On December 11, 2002, a top Department of Energy (DOE) official, Mike Lopez, described typical clean-up procedures executed by Field Lab employees in the past. Workers would dispose of barrels filled with highly toxic waste by shooting the barrels with rifles so that they would explode and release their contents into the air. It is unclear when this process ended, but for certain did end prior to the 1990s.
After a grand jury investigation and FBI raid on the facility, three Rocketdyne officials pleaded guilty in June 2004 to illegally storing explosive materials. The jury deadlocked on the more serious charges related to illegal burning of hazardous waste.
At trial, a retired Rocketdyne mechanic testified as to what he witnessed at the time of the explosion:
“I assumed we were burning waste,” Wells testified, comparing the process used on July 21 and 26, 1994, to that once used to legally dispose of leftover chemicals at the company’s old burn pit. As Heiney poured the chemicals for what would have been the third burn of the day, the blast occurred, Wells said. “It was so loud I didn’t hear anything … I felt the blast and I looked down and my shirt was coming apart.”