Those sites that do not allow dosimeters to leave the site have better control of the dosimeters, eliminate some potential causes of as well as investigations into unexpected doses (these can of course occur on-site as well), reduce variation in dose reported, especially near the Minimum Reportable Dose level due to varying background (a difference of 1 mR/hour can lead to significant man-rem when attributed to thousands of workers over long wear periods). From experience, sites that allow take-home dosimetry often experience wider variation when comparing expected versus observed dose comparisons.
Sander C. Perle President Mirion Technologies Dosimetry Services Division 2652 McGaw Avenue Irvine, CA 92614 +1 (949) 296-2306 (Office) +1 (949) 296-1130 (Fax) Mirion Technologies: http://www.mirion.com/ ”Protecting people, property and the environment” From: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Tuesday, February 5, 2013 1:42 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Powernet: RE: TLD Take Home Policy survey Palo Verde requires individuals to leave their TLDs onsite as they exit the Protected Area (Radiological Restricted Area). This allows for better background control, physical control, and reduces number of TLDs sent thru the x-ray machine when the worker returns to site. We have had this policy in place since day 1. When Security policies regarding site access badges changed (allowed to take home ACAD badge) we devised a drop off and badge storage system. From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of LaFrate, Patrick Sent: Saturday, January 05, 2013 7:21 AM To: [email protected]<mailto:[email protected]> Subject: Powernet: TLD Take Home Policy survey 1. Does your station require individuals to leave their personnel TLDs onsite upon exiting or do individuals take them home? 2. What are the principle benefits of the policy you have adopted? 3. Have you changed this policy in the past 10 years and, if so, why? 4. For multi-site nuclear fleets, is this policy consistent across your fleet or is it site specific due to operating/radiological conditions (i.e. BWR vs PWR; varying site radiation backgrounds due to operating chemistry regimes, etc.). Thanks in advance for any feedback. I appreciate it. Pat LaFrate Progress Energy Carolinas’ Dosimetry Duke Energy [email protected]<mailto:[email protected]> --- 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.
