RESULTS OF INSPECTION AND CLEANING OF TWO RADIONUCLIDE AIR-SAMPLING SYSTEMS BASED ON THE REQUIREMENTS OF ANSI/HPS N13.1-1999

The Pacific Northwest National Laboratory (PNNL) conducted inspection and cleaning activities at two radionuclide air-sampling systems that continuously monitor radioactive air emissions from research and development (RD the second system was also downstream of HEPA filters and appeared much cleaner. The videoscope was amore » useful and cost-effective tool and provided a better view than could be obtained with the naked eye. However, because even small amounts of deposition were made visible with the videoscope, clarification is needed in defining when probe washing is merited, particularly in existing sampling systems whose design is not conducive to easy removal and cleaning.« less