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.
