If your controls have been compromised then I'd use the control values from a previous period. If personnel take them home, I'd use the same time of yr last yr as the affected batch to account for any seasonal variance. I wouldn't go beyond previous controls.
I would avoid trying to inject electronic dosimeter performance/bias from previous periods as that value can vary significantly just based upon wear patterns and how much ED dose might be lost on each transaction. If someone tried to press for certainty on ED bias, your previous history more than likely has significantly more variance than control dosimeters. Glen Vickers, CHP Exelon Corp RP Technical Lead 815-216-2723 (work/cell) From: Barnhart, Jarrad T [mailto:[email protected]] Sent: Monday, March 20, 2017 3:40 PM To: [email protected] Subject: [EXTERNAL] [powernet] accidental irradiation of personnel DLRs Question from Susquehanna: A recent OSLD shipment to our vendor is showing results that indicate it may have been accidentally irradiated in transit. I am wondering if any utilities have any guidance or experience in conducting dose evaluations for this scenario. What I'm really interested in are opinions on what level of justification is needed to assign dose to individuals based on electronic estimate and/or area DLRs. In many cases I think I can build a strong argument for assigning dose based on these access records or work area dose rates, but I do not know if the basis/methodology would hold water with the NRC. I appreciate any input you may have. Thank you, [cid:[email protected]] Jarrad T. Barnhart * Health Physicist - Dosimetry Supervisor Radiation Protection * (570) 542-6529 (w) [email protected]<mailto:[email protected]> Talen Energy * 769 Salem Boulevard * NUCSA1 * Berwick, PA 18603 The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message. This Email message and any attachment may contain information that is proprietary, legally privileged, confidential and/or subject to copyright belonging to Exelon Corporation or its affiliates ("Exelon"). This Email is intended solely for the use of the person(s) to which it is addressed. If you are not an intended recipient, or the employee or agent responsible for delivery of this Email to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this Email is strictly prohibited. If you have received this message in error, please immediately notify the sender and permanently delete this Email and any copies. Exelon policies expressly prohibit employees from making defamatory or offensive statements and infringing any copyright or any other legal right by Email communication. Exelon will not accept any liability in respect of such communications. -EXCIP
