>From Callaway:
1) Where do your workers typically place the TLD/DLR and ED when working in PCs? Primary Monitoring Device (PMD) - Under the PCs on a lanyard, clipped to the clothing near the PC pocket to hold the PMD in place. Procedure requires approximate 4" proximity. We currently use the Mirion DMC-2000 with the Landauer OSLD. 2) If both are placed in the PC pocket, how do you keep the ED separate from the TLD/DLR? The PMD will be in the bag with the Secondary monitoring Device (SMD) if there is an expectation of relocating the dosimetry pack once in the field. There are concerns with shielding the PMD beta window with the SMD in this case, and we brief the person. 3) If they are not both placed in the PC pocket, have you had any issues with ED/TLD discrepancies attributed to this possible positioning difference? We used to require the PMD and SMD to be in the PC pocket as a matter of routine. According to the Dosimetry Program Owner, "we have never seen an concern with a PMD/SMD mismatch that could be attributed to shielding of the PMD by the SMD. The issue is theoretical". This WAS the prime motivator to having the workers keep their PMD under the PC coverall. (Personally, I'm of the opinion keeping the PMD on a lanyard under the coverall improves the chances that the worker will actually keep the PMD on his person while undressing and not trash it with the SMD). Questions? Call or email Dewey at Callaway : : : : : : : : : : : : : : : : : : : : : : : : : Dewey Thompson Staff HP Radiation Protection Department T 314.225.1061 F 573.676.4484 E [email protected]<mailto:[email protected]> From: [email protected] [mailto:[email protected]] On Behalf Of Sewell, Linda Sent: Thursday, January 09, 2014 10:27 AM To: [email protected] Subject: Powernet: Quick Benchmarking Question - Dosimetry Location in PCs EXTERNAL SENDER. Do not click on links or open attachments that are not expected and do not give out User IDs or passwords. ________________________________ Hi All, Diablo Canyon began using TLDs supplied by a vendor on 1/1/14. The new TLD has been integrated into the keycard lanyard. For work in CAs we have used an ED/TLD orientation card that fit into the PC pocket. Our new TLDs do not easily integrate into our existing cards. 1) Where do your workers typically place the TLD/DLR and ED when working in PCs? 2) If both are placed in the PC pocket, how do you keep the ED separate from the TLD/DLR? 3) If they are not both placed in the PC pocket, have you had any issues with ED/TLD discrepancies attributed to this possible positioning difference? Please provide a contact for follow-up questions. Thanks!!! Linda Linda M. Sewell, CHP Principal Health Physicist Pacific Gas & Electric Company Diablo Canyon Power Plant MS 119/1/117 PO Box 56 Avila Beach, CA 93424 P: 805.545.4315 | F: 805.545.2618| [email protected]<mailto:[email protected]> ________________________________ PG&E is committed to protecting our customers' privacy. To learn more, please visit http://www.pge.com/about/company/privacy/customer/ ________________________________ The information contained in this message may be privileged and/or confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. Note that any views or opinions presented in this message are solely those of the author and do not necessarily represent those of Ameren. All e-mails are subject to monitoring and archival. Finally, the recipient should check this message and any attachments for the presence of viruses. Ameren accepts no liability for any damage caused by any virus transmitted by this e-mail. If you have received this in error, please notify the sender immediately by replying to the message and deleting the material from any computer. Ameren Corporation
