Reading the EPRI guidance that is the way I interpret it. The procedure TVA uses, has us count everything that is 100 cpm or greater. We do document a survey inside and outside the clothing. That information is then available for a dose calculation if needed.
The level is determined by the highest reading we find, regardless if it is causing skin dose or not. You could have thousands of counts on the sole of a shoe before you would ever get any skin dose from it. This is one of the challenges of benchmarking PCE numbers from different sites as the criteria can vary in what is counted. Chuck Creamer Charles E. Creamer Health Physicist Tennessee Valley Authority Browns Ferry Nuclear Plant P.O. Box 2000 (Mail Stop NAB-1G-BFN) Decatur, Al. 35609-2000 Phone: 256-729-2983 Fax: 256-729-3101 Pager: 1-800-323-4853, pin 30-053 mailto:[email protected] <mailto:[email protected]> From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Sunday, October 17, 2010 10:48 AM To: [email protected] Subject: Powernet: PCE Question Friends, Do you look for >100 ncpm on the inside of clothing before classifying a clothing PCE as Level 1? Been recommended to me that EPRI guidance (excerpted below) is interpreted as suggesting that approach at some benchmark plants. The determination of the EPRI PCE level classification should be based on a frisker reading of the skin or the highest reading on clothing. For skin contaminations, a frisker reading should be the maximum reading with the frisker held approximately ½ inch away from the affected skin. For clothing, the frisker reading should be on the inside of the clothing with the detector faced away from the skin. EPRI "Guidelines for Industry Response to Personnel Contaminations Rev 1" thank you, Mark Lewis Health Physics Division Manager San Onofre Nuclear Generating Station (D1N) Work: (949) 368-1140 [email protected]
