Last summer a Chinese-made ECKO brand cheese grater set off radiation sensors at a Flint scrap yard and state regulators were stumped as to how radioactive cobalt-60 had made its way into the kitchen tool.
It turns out the Nuclear Regulatory Commission and the Department of Energy have encouraged the recycling of radioactive metals for over a decade and some have warned about the potential public health risks.
In 1999 Wenonah Hauter of the advocacy group Public Citizen wrote:
American tax dollars are being used to subsidize schemes to recycle materials contaminated with radiation. The U.S. Department of Energy (DOE), the U.S. Nuclear Regulatory Commission (NRC), and the U.S. Environmental Protection Agency (EPA) and other organizations are all involved with efforts that will make it easier for materials contaminated with radiation to find their way into innumerable products, such as braces for teeth, baby strollers, frying pans — virtually anything made out of carbon steel, stainless steel, nickel, copper or aluminum.
Astonishingly, radioactive metals are already being recycled; about 10,000 tons or radioactive metal were recycled in 1996. DOE is in the process of recycling over 100,000 tons of radioactive metal, and the nuclear industry has another 1.5 million tons of contaminated metal that it wants to recycle.
More background on radioactive recycling here.