English: A button of plutonium processed at the Savannah River Site, original caption: In the past, solutions transferred from the F Canyon were concentrated and purified in the FB Line. Then, in subsequent operations, the plutonium was precipitated, filtered, dried and finally reduced to metal form, called a button. It is about the size of a hockey puck. Processing equipment is enclosed in gloveboxes so that employees and operating areas are not exposed to the radioactive material. Some operations are automated.