ML12216A387

2012/08/01 Watts Bar 2 OL - TVA Letter to NRC_07-31-2012_Vibration Induced Fatigue Submittal

ML12216A387
Person / Time
Site:	Watts Bar
Issue date:	08/01/2012
From:	- No Known Affiliation
To:	Division of Operating Reactor Licensing
References
Download: ML12216A387 (9)

Text

1 WBN2Public Resource From: Boyd, Desiree L [dlboyd@tva.gov]

Sent: Wednesday, August 01, 2012 12:47 PM To: Epperson, Dan; Wilson, George; Poole, Justin; Milano, Patrick Cc: Arent, Gordon; Hamill, Carol L; Boyd, Desiree L

Subject:

TVA letter to NRC_07-31-2012_Vibration Induced Fatigue Submittal Attachments:

07-31-2012_Vibration Induced Fatigue Submittal_Final.pdfPlease see attached TVA letter that was sent to the NRC today.

The enclosures are too large to send by e-mail. For those of you who receive a cc in the mail, the attachments will be included with your letter.

Thank You, ~*~*~*~*~*~*~*~*~*~*~

Désireé L. Boyd WBN Unit 2 Licensing dlboyd@tva.gov 423-365-8764

Hearing Identifier: Watts_Bar_2_Operating_LA_Public Email Number: 721 Mail Envelope Properties (7AB41F650F76BD44B5BCAB7C0CCABFAF305A45E8)

Subject:

TVA letter to NRC_07-31-2012_Vibration Induced Fatigue Submittal Sent Date: 8/1/2012 12:46:45 PM Received Date: 8/1/2012 12:47:23 PM From: Boyd, Desiree L Created By: dlboyd@tva.gov Recipients: "Arent, Gordon" <garent@tva.gov>

Tracking Status: None "Hamill, Carol L" <clhamill@tva.gov>

Tracking Status: None "Boyd, Desiree L" <dlboyd@tva.gov> Tracking Status: None "Epperson, Dan" <Dan.Epperson@nrc.gov> Tracking Status: None "Wilson, George" <George.Wilson@nrc.gov>

Tracking Status: None "Poole, Justin" <Justin.Poole@nrc.gov> Tracking Status: None "Milano, Patrick" <Patrick.Milano@nrc.gov> Tracking Status: None

Post Office: TVANUCXVS2.main.tva.gov Files Size Date & Time MESSAGE 419 8/1/2012 12:47:23 PM 07-31-2012_Vibration Induced Fatigue Submittal_Final.pdf 135386

Options Priority: Standard Return Notification: No Reply Requested: Yes Sensitivity: Normal Expiration Date: Recipients Received: is to be withheld from public disclosure under 10 CFR

§ 2.390. When separated from this enclosure, this letter is decontrolled.

Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000

July 31, 2012

10 CFR 50.4

U.S. Nuclear Regulatory Commission

ATTN: Document Control Desk Washington, D.C. 20555-0001

Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391

Subject:

Watts Bar Nuclear Plant (WBN) Unit 2 - WBN Unit 2 Evaluation for Tube Vibration-Induced Fatigue

Reference:

1. TVA letter to NRC dated March 1, 1989, Watts Bar Nuclear Plant (WBN) Units 1 and 2 - Nuclear Regulatory Commission (NRC) Bulletin 88-02, Rapidly Propagating Fatigue Cracks In Steam Generator Tubes This letter provides documents that TVA committed to provide in response to NRC

Bulletin 88-02, Rapidly Propagating Fatigue Cracks in Steam Generators Tubes, as detailed

in the reference above.

TVA Commitment Item 4 of Enclosure 2 of the reference stated, The results of the thermal-hydraulic analysis and details of the permanent long-term corrective actions will be submitted to the NRC when they become available to TVA.

Commitment Closure Enclosure 1 contains the Westinghouse Electric Company (WEC) proprietary version of WCAP-17309-P, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue,

dated February 2012. This report documents the evaluation for tube vibration-induced fatigue

for the WEC Model D3 steam generators at WBN Unit 2 for susceptibly to fatigue-induced cracking of the type experienced at North Anna Unit 1 in July 1987.

Enclosure 2 contains WEC non-proprietary version of WCAP-17309-P, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 2012.

U.S. Nuclear Regulatory Commission Page 3 July 31, 2012

Enclosures:

1. WEC Proprietary Document: WCAP-17309-P Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 2012.

2. WEC Non-Proprietary Document: WCAP-17309-NP, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 2012. 3. WEC non-proprietary document CAW-12-3414, Application for Withholding Proprietary Information from Public Disclosure WCAP-17309-P, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 28, 2012.

cc (Enclosures):

U. S. Nuclear Regulatory Commission

Region II Marquis One Tower

245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant

1260 Nuclear Plant Road Spring City, Tennessee 37381

U.S. Nuclear Regulatory Commission Page 4 July 31, 2012

bcc (Enclosures):

George Wilson

U.S. Nuclear Regulatory Commission

MS 08B1A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738

Fred Brown, Deputy Regional Administrator for Construction U. S. Nuclear Regulatory Commission Region II Marquis One Tower

245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257

Withhold from Public Disclosure Under 10 CFR 2.390 Enclosure 1 WCAP-17309-P, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 2012 E1-1 Enclosure 2

WCAP-17309-P, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 2012 E2-1 Enclosure 3

CAW-12-3414, Application for Withholding Proprietary Information from Public Disclosure WCAP-17309-P, Revision 1, Watts Bar Unit 2 Evaluation for Tube Vibration Induced Fatigue, dated February 28, 2012 E3-1