Adina,
Beaver Valley responses:
1. Yes. We have operating movable incore detectors and some used incore detectors. We also have gamma metric detector at BV2.
2. The operating incore detectors are verified by the fact they have a signal. We only require that the used incore detectors are verified during accessible times, i.e. refueling. This is once every 18 months. We go into containment and verify that the ends of the detector with the ID tags are in the lead lined storage area. When the detectors are transferred to the barrel for eventual disposal, we (REs) witness the transfer. We then place a TID on the barrel. Gamma metric detectors are verified by signal responses.
3. We currently reference NRC Reg Guide 5.15 for the use and control of TIDs. The details of the TID are contained in our procedures and copies of the forms are sent to Records through annual SNM inventory work orders.
4. If a container with a TID were to be openned we would witness the openning and just annotate what was removed or added. All verifications are required to have two individuals familiar with the items being inventoried. This means that it does not necessarily need to be an RE. Our I&C techs are familiar with incore detectors and can be used as a second verifier. Usually at least one of the verifiers is an RE.
Anthony (A.R.) Burger Supervisor, Reactor Engineering FENOC - Beaver Valley Power Station Phone: (724) 682-4108 Cell: (724) 601-3224 FAX: (724) 682-4250 Email: aburger@firstenergycorp.com
Adina K Lafrance <adina.k.lafrance @dom.com> To Sent by: "RETAQS (pwrrm@retaqs.com)" pwrrm@retaqs.com pwrrm@retaqs.com cc
10/11/2010 04:49 Subject PM [Pwrrm] Accounting for SNM in containment
Please respond to PWR Reactivity Management <pwrrm@retaqs.com >
The recent OE concerning the reactor vessel surveillance capsules, OE32026, has generated a number of additional questions here at Dominion concerning the storage of used non-fuel SNM items in our containment buildings. In particular, how are physical inventories performed when an item is relativity inaccessible during reactor operation (e.g., sub-atmospheric containments)? In the past Dominion has used administrative controls. Realizing the 2009 ANSI Standard, N15.8 “Material Control Systems-SNM Control and Accounting Systems for Nuclear Power Plants” provides some guidance in situations such as this, we are looking for some practical approaches to satisfy this guidance.
1. Do you have Non-Fuel SNM stored in containment (not installed in a system)? 2. If yes, when and how are physical inventories performed on these items, i.e. during outages or at-power entries, item count or container count if protected by tamper-indicating devices (TIDs)? 3. If TIDs are used, do you have a TID control program that follows the May 2010 Reg. Guide 5.80, “Pressure-Sensitive and Tamper-Indicating Device Seals for Material Control and Accounting of SNM”? If you do not follow Reg. Guide 5.80, where do you differ? 4. If a container that is protected by a TID is opened, what actions are taken to assure the contents of the container are properly accounted for prior to applying another TID e.g. piece count of items in the container, simultaneous verification by two individuals of the items added or removed from the container, etc?
Thank you in advance for your help.
Adina LaFrance Reactor Engineer Nuclear Analysis and Fuels, Surry Power Station
Dominion Generation Phone: 757-365-2658; Internal: 8-798-2658 E-mail: Adina.K.LaFrance@dom.com
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