Thanks Seth. Good points. So if you found a 200 ncpm spot on the outside of a shirt that read no detectable on the inside, would it be reported a level 1? Created a "Level 0" for this type of find?
thanks Mark Lewis Health Physics Division Manager San Onofre Nuclear Generating Station (D1N) Work: (949) 368-1140 [email protected] From: [email protected] To: [email protected] Date: 10/17/2010 09:24 AM Subject: RE: Powernet: PCE Question Sent by: [email protected] Yes, by doing this you can determine to what, if any extent the discrete particle has migrated through the material. This is important if a discrete particle is beneath the surface since most clothing materials will cause a certain level of beta attenuation. While Level 1 contaminations typically won?t result in the assignment of shallow dose, looking on both sides of the material is nonetheless a good health physics practice because of the ease at which material can mask the activity that is present. This will also allow for proper PCE classification. And, if the contamination results in having to calculated SDE dose you can use a more accurate MAF. Seth. ********************************************************************** Seth J. Kanter, CHP, RPT Sr. Health Physicist Palo Verde Nuclear Generating Station Mail Sta. 7397 5801 S. Wintersburg Rd. Tonopah, AZ 85354 Phone (623) 393-3130 Fax (623) 393-2487 Unless otherwise noted, all opinions are my own Liviu Librescu ********************************************************************** From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Sunday, October 17, 2010 8:48 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] Email Firewall made the following annotations --------------------------------------------------------------------- --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. If you have received it in error, please notify the sender immediately and delete the original and any copy or printout. Unintended recipients are prohibited from making any other use of this e-mail. Although we have taken reasonable precautions to ensure no viruses are present in this e-mail, we accept no liability for any loss or damage arising from the use of this e-mail or attachments, or for any delay or errors or omissions in the contents which result from e-mail transmission. ---------------------------------------------------------------------
