We manually track 4 isotopes, Xe-131m, Xe-133, Xe-133m, and Xe-135m. We start tracking exposure when the airborne concentration exceeds the calculated exposure rate of 25 mrem/hr. This number is derived from the 50 rem SDE limit in 10CFR20 (40 hours/week, 50 weeks/year = 2000 hours/year)
[APS_NLOGO_CMYK_Gradient] PHILLIP WALL Sr. Health Physicist, Radiation Protection 5801 S. Wintersburg Rd., Tonopah AZ 85354, M.S. 7397 Tel 623 393 2627 [email protected]<mailto:[email protected]> aps.com<http://www.aps.com/> From: Lloyd, David J [mailto:[email protected]] Sent: Wednesday, March 16, 2016 14:36 To: [email protected] Subject: [powernet] Xe-133 Threshold for Tracking ____________________________________________________ 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 Information Systems Security team at [email protected]<mailto:[email protected]> or contact the APS Helpdesk. ____________________________________________________ Question: At what DAC value does your site start tracking Xe-133 exposure and what is the basis for your number? Thanks, Dave David J. Lloyd | Fleet Scientific Services | Senior Scientist | Duke Energy Carolinas, LLC 526 S. Church St. | Mail Stop EC07F | Charlotte, NC 28202 | 980-373-7437 office | 704-678-3603 cell [DE_Logo] --- 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.
