Under vessel (Incore sump area) is posted VHRA and locked with VHRA key. Incore system is taken out of service. Any work group entering containment signs onto the out of service. Exception is when we are actually doing maintenance on drive boxes that requires a temp lift of the OOS or potential for detector movement. We have detailed plan for that activity.
Harry L Miller Exelon Nuclear Braidwood Station 815-417-2713 [email protected] North Anna uses the lockout / tagout process. HP signs out on the master tagout for the incore system. This prevents the system from being operated without our knowledge/consent. In addition, we lock and post our under vessel area to prevent access We do administratively control lock and prevent access to our under vessel area when retracting the guide thimbles, moving the incore detectors, or when the incore detectors are not in storage (in the core or storage well). We do not normally lock our seal table room during refueling outages. Barbara J. Thompson Supervisor of Exposure Control Dominion - North Anna Power Station Email: [email protected] <mailto:[email protected]> Phone: 540-894-2605 Beeper: #3469 FAX: 540-894-2408 From: [email protected] [mailto:[email protected]] On Behalf Of Barber, Jerry Sent: Friday, January 20, 2012 10:42 AM To: '[email protected]' Subject: Powernet: Incore System Controls During Refuel Outages Robinson has the following question for other PWRs: How do you ensure that Incore detectors are not inadvertently operated during refueling outages while personnel are present in containment? Is a clearance routinely taken out on your Incore System at the beginning of a refueling outage? Do you normally keep your seal table room locked during refuel outages? CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and/or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you. ----------------------------------------- ************************************************** This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies. This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. Thank You. **************************************************
