Just off the cuff, it sounds like the unexpected accumulated dose you are seeing could be a different setting in your access control software. When people log in or out of the RCA, the software has a lower threshold below which it will round down to zero and not record exposure accumulated by the dosimeter. If your old threshold was 0.2 mrem and your new threshold is 0.1 mrem or something else lower, that could account for the small amounts of dose you are now accumulating.
One quick way to support or refute the idea that the DMC3000 responds differently relative to your TLD/OSL than your previous electronic dosimeters do is to compare the energy dependent response curves from the tech manuals for the dosimeters. If the new electronic dosimeters are more sensitive than your old ones at the energy ranges that matter to you (in a PWR aux building, it will be the low-energy range), the difference in response could explain the unexpected dose you're measuring. Best of luck! Heather [cid:[email protected]][cid:[email protected]] Heather Jackson, CHP, RRPT| Sr. Health Physicist *623-393-6076 | *[email protected]|<mailto:[email protected]%7C>*623-393-1853 | PVNGS Mail Station 7397 From: Macho, Michael [mailto:[email protected]] Sent: Tuesday, July 12, 2016 2:25 PM To: [email protected]; [email protected] Subject: [powernet] DMC 3000 G2 electronic dosimeters increased response. ____________________________________________________ USE CAUTION - EXTERNAL SENDER:([email protected]<mailto:[email protected]>) Do not click on links or open attachments that are not expected. For questions or concerns, please email the APS Cyber Defense Center team at [email protected]<mailto:[email protected]> or contact the APS Helpdesk. ____________________________________________________ We are completing the first six month monitoring period using DMC3000 G2 version electronic dosimeters and have noticed that individual departments (e.g., Security) and individuals who previously received little or no exposure and make numerous entries now are accumulating small amounts during the week. I would not expect to receive the processed TLD results for a month. My questions are: 1) I would like to know if any other DMC3000 users have experienced similar occurrences? 2) Has the increase in estimated dose resulted in an increase in TLD/OSL to estimated (DMC3000) dose mismatch? Michael Macho Radiation Protection Supervisor [email protected]<mailto:[email protected]> [cid:[email protected]] SAFETY is first QUALITY SCHEDULE Luminant Power Comanche Peak Nuclear Power Plant 6322 North FM 56 or PO Box 1002 Mail Code 005A Glen Rose, TX 76043 (254)897-5698 --- 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.
