She made many of the images in "Radioactive" using a process called cyanotype printing, in which a drawing is, through a chemical process that involves sunlight, turned into a kind of glowing negative of the original.
Such focused beams could detect radioactive bomb-making material, or radioactive tracers used in medical imaging.
In addition to the wastes from the irradiated ships, the site is also contaminated with radioactive paint used to make deck markers and devices glow, fuels and pesticides, and radioactive materials used in lab experiments.
The remainder is from x-rays and radioactive materials used for medical diagnosis and therapy.
Today, the process usually begins with cobalt-60, a highly radioactive material used in industrial radiography and medical radiotherapy.
The factories refined polonium 210, a highly radioactive material used in initiators to help start the bomb's chain reaction.
Traces of polonium, the radioactive substance used to kill Mr Litvinenko, were found at the British Embassy in Moscow.
The most dangerous materials, they said, are bars of radioactive cobalt used to irradiate food, medical devices and other products to sterilize them.
The cable revealed that the facility holds large quantities of radioactive material used by hospitals, local universities for agricultural research and in oilfields.
Science ministry officials believed the bottles contained radium-226, a radioactive material used in fluorescent paint on watch faces and in medical devices, the Yomiuri Shimbun said.
