Palo Verde provides the following response: We have seen variants of this phenomenon when doing in field RWP changes and as Joe indicated, when you are using a substation on Sentinel you want to look to see how your parameters compare to your standard log in stations. We use an LDM-250 (a 220 built inside a housing to preclude electronic dosimeter movement during log-in).
When we change RWPs in the field the system requires that the worker to remove the dosimeter from reader and to start the log in transaction over again. Because we have had events where workers have left with the dosimeter in pause we put in some additional corrective actions for in-field RWP changes such as requiring a second, independent check by another Radiation Protection Technician to make sure that the electronic dosimeter in on. We also set up DMC Viewer stations in the field with an LDM-220 to allow verification of a dosimeter's status, i.e., running, correct RWP and task, alarm status, etc. For help with the in-field substation settings, contact Phil Wall (623) 393-2627, [email protected]<mailto:[email protected]> Seth From: [email protected] [mailto:[email protected]] On Behalf Of Danek, Joe Sent: Wednesday, November 02, 2011 7:09 AM To: '[email protected]' Subject: Powernet: RE: ED Turned Off in RCA We haven't seen this here. Do you know if they were using a sub station? There are preference settings for sub stations which will turn the dosimeter off when changing RWPs or leave it on and just reset the set points and dose total depending on which you select, which may be a contributor to this if it happened at a substation and the preference was set to turn it off. When changing RWPs at the primary station the system requires the worker to remove the dosimeter from near the reader in order to start a new log in transaction. We use the DMC-2000S with the LDM -200 reader, the log in screen has a message that displays not to remove the dosimeter until it has been programmed, the screen turns green and states access permitted when it's ready. Cathy Dole Senior Radiation Protection Analyst ALARA Coordinator From: [email protected] [mailto:[email protected]] On Behalf Of Courtenay, Christopher C Sent: Wednesday, November 02, 2011 7:38 AM To: [email protected] Cc: Jonas, Kathy L; Litaker, Jeffrey R; Morgan, Steven L; Marek, Jeff Subject: Powernet: ED Turned Off in RCA Duke Energy would like to know if anyone has or is experiencing the following: ED (electronic dosimeter) problems being experienced when changing RWPs (Radiation Work Permits). When change RWPs the ED is turned off and back on to write the new RWP dose and dose rate alarm set points to the ED. Currently, the following is randomly occurring: After the ED is turned off and the worker is logged onto the new RWP in Sentinel, the following error message occurs on the kiosk 'ACCESS DENIED The Dosimeter has been removed from the Reader!'. The worker has not removed the ED from the reader. The results is the worker is logged into the RCA/RCZ with an inactivated ED. Duke Energy uses Sentinel 1.09 and the DMC2000S ED. Has anyone else experienced this on a more than "normal" basis? What is the age of your dosimeters? What LDM readers do you use? What is the configuration of your LDM readers and access stations? (Duke uses an LDM101 shell with LDM220 reader inside, facing down, on some stations) Any experience or insight would be greatly appreciated. Chris Courtenay Engineer, Duke Energy 980-875-5005 "To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be." --- 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.
