ML11347A438
| ML11347A438 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 12/02/2011 |
| From: | Office of Nuclear Reactor Regulation |
| To: | Division of Operating Reactor Licensing |
| References | |
| Download: ML11347A438 (3) | |
Text
1 WBN2Public Resource From:
Poole, Justin Sent:
Friday, December 02, 2011 3:30 PM To:
Arent, Gordon; Bryan, Robert H Jr Cc:
WBN2HearingFile Resource
Subject:
FW: For Your Review - Potential Issue - TS SFP Storage Importance:
High This was the email that was sent to Unit 1 about 2 weeks ago. The concern was found while reviewing the proof and review of the Unit 2 TS. Please work with Unit 1 to resolve the potential issue. Thanks.
Justin C. Poole Project Manager NRR/DORL/LPWB U.S. Nuclear Regulatory Commission (301)415-2048 email: Justin.Poole@nrc.gov From: Lamb, John Sent: Monday, November 21, 2011 1:41 PM To: Shea, Joseph W Cc: Stacy, Kara Morgan; Riedl, Christopher John; Arent, Gordon; Raghavan, Rags; Bavol, Bruce; Milano, Patrick; Poole, Justin; Lyon, Fred; Schulten, Carl; Wood, Kent; Monk, Robert; Miller, Kenneth; Shaeffer, Scott
Subject:
For Your Review - Potential Issue - TS SFP Storage Importance: High
- Joe, The NRC staff found a potential issue with WBN Unit 1 during our review of the WBN Unit 2 proposed TS 4.3 Fuel Storage.
The proposed WBN Unit 2 TS 4.3.1.1 d says Fuel assemblies with enrichments less than or equal to 3.80 weight percent U-235 are allowed unrestricted storage.
The proposed WBN Unit 2 TS 4.3.1.1.e.2 says, New and spent fuel assemblies may be stored in a checkerboard arrangement of 2 new and 2 spent assemblies, provided that each spent fuel assembly has accumulated a minimum burnup in the acceptable domain identified in Figure 4.3-4. Figure 4.3-4 requires fuel assemblies with an enrichment of 3.80 weight percent U-235 to have a burnup of approximately 10.32 GWD/MTU before they are candidates for storage in that checkerboard. Figure 4.3-4 requires some amount of burnup down to an enrichment of 2.51 weight percent U-235.
Therefore, fuel assemblies with enrichments less than or equal to 3.80 weight percent U-235 are NOT allowed unrestricted storage in the WBN Unit 2 SFP and proposed WBN Unit 2 TS 4.3.1.1 d must be removed from the TS. The wording in TS 4.3.1.1.e will also need to be revised.
As the WBN Unit 2 proposed TS are virtually identical to the WBN Unit 1 TS, this is a potential issue that currently exists in the WBN Unit 1 TS. Therefore, TVA must (1) correct the WBN Unit 1 TS, (2) identify whether or not WBN Unit 1 currently has any fuel stored in the New and spent fuel assemblies may be stored in a checkerboard arrangement of 2 new and 2 spent assemblies that does not meet Figure 4.3-4, and (3) if, so, move them immediately, and (4) determine whether WBN Unit 1 ever had any fuel stored in the New and spent fuel assemblies may be stored in a checkerboard arrangement of 2 new and 2 spent assemblies that does not meet Figure 4.3-4.
2 Thanks.
John
Hearing Identifier:
Watts_Bar_2_Operating_LA_Public Email Number:
599 Mail Envelope Properties (19D990B45D535548840D1118C451C74DC534A25FEC)
Subject:
FW: For Your Review - Potential Issue - TS SFP Storage Sent Date:
12/2/2011 3:30:09 PM Received Date:
12/2/2011 3:30:10 PM From:
Poole, Justin Created By:
Justin.Poole@nrc.gov Recipients:
"WBN2HearingFile Resource" <WBN2HearingFile.Resource@nrc.gov>
Tracking Status: None "Arent, Gordon" <garent@tva.gov>
Tracking Status: None "Bryan, Robert H Jr" <rhbryan@tva.gov>
Tracking Status: None Post Office:
HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 2617 12/2/2011 3:30:10 PM Options Priority:
High Return Notification:
No Reply Requested:
No Sensitivity:
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