SCO: Tricks of the Trade
J. C. Smith, M. Rodriguez
Large quantities of radioactive waste are being generated and shipped under the U.S. Department of Transportation (DOT) classification of Surface Contaminated Object (SCO) at the Rocky Flats Environmental Technology Site (RFETS). Shipping items as SCO can result in significant time and cost savings if done correctly and efficiently. This process is relatively new to the Department of Energy facilities dealing with transuranic alpha emitting contaminants including plutonium. This paper describes the lessons learned, including: 1) The proper methods used to group items into statistically valid populations called Survey Characterization Units (SCUs); 2) The definition of inaccessible surfaces; 3) The methods used to turn accessible surfaces into inaccessible surfaces; 4) The calculation of the surface area of objects using a surface area to mass ratio; and 5) The determination of wiping efficiencies for removable contamination measurements.
This abstract was presented at the 35th Annual Midyear Meeting, "Decommissioning and Environmental Restoration", Decommissioning 2 Session, 2/17/2002 - 2/20/2002, held in Orlando, FL.