PWRRM November 2010

pwrrm@retaqs.com

5 participants
4 discussions

Accounting for SNM in containment
by Adina K Lafrance 23 Nov '10

23 Nov '10

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(a)dom.com 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.

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SNM inventory question
by WILLETT, JOSEPH E 23 Nov '10

23 Nov '10

Fort Calhoun performs two verifications first in the SFP following CEA Shuffle. Second, core verification is performed following core reload using a PTZ camera. The verification of 133 fuel assemblies takes two(2) hours, including camera setup after reload is complete. We have an RE and an STA or RE-alternate on the refueling machine. QA usually observes. Fuel assembly IDs orientation and core location are read by one person and confirmed by the other that verifies correct core location, ID and orientation. Prior to the serial number verification, FCS utilizes refueling machine mast camera to perform the alignment verification, which also takes about two(2) hours. J. E. Willett ---------------------------------------------------- Joseph E. Willett, P.E. Principal Reactor Engineer-Fuel Nuclear Operations Division E-mail: jwillett(a)oppd.com<mailto:jwillett@oppd.com> Omaha Public Power District Phone: (402) 533-7213 Fort Calhoun Station Pager: (402) 561-3899 9610 Power Lane FAX: (402) 533-6747 Blair, NE 68008 Mail Station: FC-1-1 Plant ---------------------------------------------------- -------- This e-mail contains Omaha Public Power District's confidential and proprietary information and is for use only by the intended recipient. Unless explicitly stated otherwise, this e-mail is not a contract offer, amendment, nor acceptance. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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SNM inventory question
by ddgoff＠aep.com 23 Nov '10

23 Nov '10

DC Cook is looking at efficiencies during the outages. We are trying to minimize activities associated with reload. For those of you who do the Core SNM Inventory as you load the fuel. What is the process you use, camera check of serial number and camera check of the core when you put it in the core? How many people do the video check, one on line and one later, two online, or just one? Where do the checkers sit, in the office, in a camera room? Can you share you SNM procedure on your core Inventory? thanks Glen M Bradham, 269-465-5901 X1538

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reference bank worth by dilution during physics
by Kenneth R Pike 13 Nov '10

13 Nov '10

For those that measure reference bank worth by dilution during physics testing, how do you determine when to stop the dilution? The process for Beaver Valley is to start a dilution with ARO and the reference bank at near ARO. The dilution is compensated for by inserting the reference bank (measured with a reactimiter supplied by the vendor). The goal is terminate the dilution so that less than 75 pcm is left in the reference bank. Contingencies are built in if you "overshoot" to insert another bank then borate it back out. Contingencies are also built in if you come up short of 75 pcm to dilute the bank into less than 75 pcm. We have experienced both under and overshoots here which is fine and allowed by procedure, we are just looking to see if there is a more precise method. Travis B. Link Beaver Valley Reactor Engineering P.O. Box 4 - Mail Drop A-BV-A Shippingport, PA 15077 (724) 682-4149 (Work) (412) 667-1487 (Cell) (412) 305-3041 (Pager) (724) 682-4250 (FAX) tlink(a)firstenergycorp.com

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PWRRM November 2010