It has been revealed that ailing imaging company Kodak had a secret nuclear reactor hidden in a US research facility for more than 30 years. The reactor, which contained 1.5kg of enriched weapons-grade" uranium, was a Californium Flux Multiplier (CFX) acquired by the company in 1974 and only decommissioned in 2006. "The uranium used in the CFX was highly enriched, but ... was not easily adaptable to creating a nuclear weapon," company spokesman Christopher Veronda told Fairfax Media. While the reactor was not used to generate power and therefore was not at risk of a meltdown, it was still vulnerable to radiation leaks. "These devices are very rare," said Miles Pomper, a senior research associate at the Center for Nonproliferation Studies in Washington, D.C. "According to the decommissioning plan submitted by Kodak it is only one of two such devices ever produced - and the only one for private industry," Mr Pomper [said]. The CFX, which was roughly the size of a domestic refrigerator, was used for neutron multiplication, an analytical method. Kodak used it to test chemicals for impurities, and to perform neutron radiography - an imaging technique in which neutrons are passed through an object [and] then produce an image of the object as they expose a photographic film. If the reactor really was secure, it poses the question: why was it decommissioned? Kodak claims that in 2003 it made the decision to pursue alternative, more cost-effective methods of analysis. The uranium was removed in 2007 and taken to a government facility in South Carolina.