There are thousands of reactor-yrs of operations with good levels of human performance without trying to have a timer or distract the radworker. I think we can focus on other processes and behaviors with our limited resources and better maintain or improve our performance. A decent site will probably only have 1 dose alarm event in a 3-5 yr period.
Last yr a large dual unit BWR had 152438 ED log in/out transactions and a large dual unit PWR had 74319 transactions. You're talking 1 event for 3 times these record yields. I'd also bet in most all of those cases workers received less than 5 mrem additional unanticipated exposure after the infrequent event. This is better than the frequency of occurrence for important events like operator misposition events, improper clearance order activities putting workers at risk, etc. I'd focus on mechanical and human performance excellence in the field and the good radiological metrics will follow. At least 73% of the workforce would fail the 15 minute test if time with a watch, but that doesn't mean they are bad radworkers. I think counting dose and rate alarms is a better measure of RP and/or worker performance. We can easily identify and count the adverse event. Rate alarms many times have RP and radworker causal factors so you have to dig into those a little deeper. I think an excessive number of "planned dose rate alarms" is warning flag for the RP program. These will also be the sites with higher numbers of unplanned rate alarm events. Sometimes RP also contributes to dose alarms by making the dose alarm unusually low relative to the task at hand and increasing the likelihood of an event. Good luck in trying to find the right measures to properly characterize your population of radworkers... Glen Vickers, CHP Exelon Corp RP Technical Lead 815-216-2723 (work/cell) From: Whitener, Christopher Alan [mailto:[email protected]] Sent: Tuesday, April 18, 2017 5:59 PM To: '[email protected]' Subject: [EXTERNAL] [powernet] Dose Check Timers Does anyone use 15 minute alarm timers or other devices to remind workers to check dose on their electronic dosimeter? Chris Whitener MNS Chemistry Manager [https://nuc.duke-energy.com/sites/McGuireComms/Shared%20Documents/2016%20Documents/PROS%20Email%20Banner.jpg][cid:[email protected]] The #1 PROs have a coach!!! 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
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