ML13252A013

Response to NRC Request for Additional Information Related to the Application to Revise the Updated Final Safety Analysis Report Regarding Changes to the Hydrologic Analysis

ML13252A013
Person / Time
Site:	Watts Bar, Sequoyah
Issue date:	08/28/2013
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML13252A013 (6)

Text

Su-it-Relate Information. Wit*held U'ndr 10 CFR 22'^ /2.89 1t Thlis Ietter as deeentro'lld when separated fi-em Attechmenf OCLI 4A Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 August 28, 2013 10 CFR 50.4 10 CFR 2.390(d)(1)

U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 1 Facility Operating License No. NPF-90 NRC Docket No. 50-390 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328

Subject:

Response to NRC Request for Additional Information Related to the Application to Revise the Updated Final Safety Analysis Report Regarding Changes to the Hydrologic Analysis for Watts Bar Nuclear Plant, Unit 1, and Sequoyah Nuclear Plants, Units 1 and 2

References:

1. Letter from TVA to NRC, "Application to Revise Watts Bar Nuclear Plant Unit 1 Updated Final Safety Analysis Report Regarding Changes to Hydrologic Analysis, TAC No. ME8200 (WBN-UFSAR-12-01)," dated July 19, 2012 (ML122360173)

2. Electronic Mail from A. Hon (NRC) to J. W. Shea (TVA), "Watts Bar Nuclear Station, Unit 1 - Request for Additional Information Related to License Amendment Request to Updated Final Safety Analysis Report Changes Associated with Hydrological Analysis (TAC No. ME9130),"

dated August 15, 2013 (ML13231A082)

3. Letter from TVA to NRC, "Application to Revise Sequoyah Nuclear Plant Units 1 and 2 Updated Final Safety Analysis Report Regarding Changes to Hydrologic Analysis, (SQN-TS-1 2-02)," dated August 10, 2012 (ML12226A561)

4. Electronic Mail from S. Lingam (NRC) to E. D. Schrull (TVA), "Watts Bar Nuclear Station, Unit 1 - Request for Additional Information Related to License Amendment Request to Updated Final Safety Analysis Report Changes Associated with Hydrological Analysis (TAC No. ME9130),"

dated August 16, 2013 (ML13231A082)

By letter dated July 19, 2012 (Reference 1), Tennessee Valley Authority (TVA) submitted an application to revise the Watts Bar Nuclear Plant (WBN), Unit 1 Updated Final Safety Printed on renycled paper

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U.S. Nuclear Regulatory Commission Page 2 August 28, 2013 Analysis Report to reflect the results from a new hydrologic analysis. By letter dated August 10, 2012 (Reference 3), TVA submitted a LAR to revise the Sequoyah Nuclear Plant (SQN), Units 1 and 2 Updated Final Safety Analysis Report to reflect the results from the same hydrologic analysis. The proposed changes include updated input information, and updates to the methodology that include the use of U. S. Army Corps of Engineers Hydrologic Modeling System and River Analysis System software.

On August 15, 2013, the NRC transmitted a request for additional information (RAI) by electronic mail (email) for WBN, Unit 1 (Reference 2). The staff identified three items in the NRC's confirmatory hydrologic analysis model that require the updated information contained in TVA's new hydrologic analysis addressed in the Reference 1 submittal. The RAI requested that TVA submit for docketing, six specific calculation packages contained in the new TVA hydrologic analysis. The response to the RAI is due by September 13, 2013. The enclosure to this letter provides TVA's response.

On August 16, 2013, the NRC clarified by email (Reference 4) the applicability of the subject RAI to SQN, Units 1 and 2. As a result, the enclosed TVA response is also applicable to SQN, Units 1 and 2.

The requested information is contained in the attached Optical Storage Media (OSM)

(Attachment OSM-1). The OSM contains security-related information identified by the designation "Security-Related Information - Withhold Under 10 CFR 2.390." TVA requests this information be withheld from public disclosure in accordance with the provisions of 10 CFR 2.390.

There are no new regulatory commitments included in this submittal. Please address any questions regarding this submittal to Edward D. Schrull at (423) 751-3850.

I declare under penalty of perjury that the foregoing is true and correct. Executed on this 28th day of August 2013.

Respe ul J..

S a

Vi e Preisident, Nuclear Licensing

Enclosure:

Response to NRC Request for Additional Information Related to License Amendment Request to Updated Final Safety Analysis Report Changes Associated with Hydrologic Analysis for Watts Bar Nuclear Plant, Unit 1

Attachment:

OSM-1 "Security-Related Information Withhold Under 10 CFR 2.390" cc: See Page 3

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U.S. Nuclear Regulatory Commission Page 3 August 28, 2013 Enclosure cc (Enclosure w/o attachment):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - Sequoyah Nuclear Plant NRC Senior Resident Inspector - Watts Bar Nuclear Plant, Unit 1 PNNL

... urit; RelateJd Irfnn.t,.o, W;i.thhould U.nder 10 CFR 72.390 This letter Rs deeontrelled when sep~arated frer "ttahment 9SrMi-.

ENCLOSURE TENNESSEE VALLEY AUTHORITY WATTS BAR NUCLEAR PLANT, UNIT I SEQUOYAH NUCLEAR PLANT, UNITS I AND 2

Subject:

Response to NRC Request for Additional Information Related to the Application to Revise the Updated Final Safety Analysis Report Regarding Changes to the Hydrologic Analysis for Watts Bar Nuclear Plant, Unit 1, and Sequoyah Nuclear Plants, Units I and 2 NRC RAI By letter dated July 19, 2012 (Reference 1), Tennessee Valley Authority (IVA) submitted a license amendment request (LAR) to revise the Watts Bar Nuclear Plant (WBN), Unit 1 Updated Final Safety Analysis Report to reflect the results from new hydrologic analysis. On August 15, 2013, the NRC transmitted a request for additional information (RAI) by electronic mail (email) (Reference 2). The RAI requests that TVA submit for docketing, six specific calculation packages contained in the new TVA hydrologic analysis. The RAI requests and TVA response are presented below:

1.0 "CDQ000020080054_Rev_3.pdf', which includes a discussion of the methods applied to Dallas Bay rim leak for the 21,400 mi2 PMP case. This calculation package also includes several attachments, of which the following are also needed:

Attachment "CDQ000020080054_APPENDIXH.pdf', which includes discussion, discharge plots, and a Chickamauga-Dallas Bay rating curve.

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Attachment "CDQ000020080054 Appendix H - H.pdf' o

Attachment:

"21400_Seg1_WBNSQNElevation and Discharge PlotsCurrentLockConfigRev3.xlsx" Worksheet: "Elevation and Discharge Data" o

Attachment:

"21400 Seg2 WBNSQNElevation and Discharge PlotsCurrentLockConfig Rev3.xlsx" Worksheet: "Dallas Bay 2.86 Plot" Worksheet: "Looped Rating Curve Data" o

Attachment:

"21400 Seg2 WBNSQNMaximum Profile PlotsCurrentLockConfigRev3.xlsx" Worksheet: "Tennessee River Max Elevation" Worksheet: "Tennessee River Max Discharge" Worksheet: "North Chickamauga Max Elevation" Worksheet: "North Chickamauga Max Discharge" Worksheet: "Lick Branch Max Elevation" Worksheet: "Lick Branch Max Discharge" E1-1

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This letter ne deeentFOIlcd when separated from Atbc8hffict OSIV 1.

ENCLOSURE 2.0 "CDQ000020080054_APPENDIX G.pdf', which includes a discussion of the methods applied to Dallas Bay rim leak for June 7980 mi2 PMP case. This calculation package also includes the following attachment which is needed:

Attachment:

"CDQ000020080054_.Appendix G-G.pdfr o

"7980_BGJUNWBNSQN_Seg2_Elevation and Discharge Plots20O1 10808.xlsx" Worksheet: "Elevation and Discharge Data" 3.0 "CDQ000020080054_APPENDIX M.pdfr, which includes a discussion of the methods applied to Dallas Bay rim leak for March 7980 mi 2 PMP case. This calculation package also includes the following attachment which is needed:

Attachment:

"CDQ000020080054_Appendix M-M.pdf' o

"7980BGMARSQNWBNCurrent_Seg _Elevation and Discharge Plots.xlsx" Worksheet: "Elevation and Discharge Data" o

"7980BGMARSQNWBNCurrentSeg2_Elevation and Discharge Plots.xlsx" 0

Worksheet: "Elevation and Discharge Data" 4.0 "Calc_CDQ000020080020 Rev4.pdf', which includes a discussion of the methods applied to Watts Bar West Saddle Dike. This calculation package also includes the following attachments that are needed:

• 1: "Watts Bar Area Topo.pdf'

• 0: "Watts Bar Rating Curves Rev4.xlsm" o

Worksheet: "W. Saddle Dam" 5.0 "Calc_CDQ000020080020 Rev4.pdf', which includes a discussion of the methods applied to account for rim leaks around Watts Bar Dam. This calculation package also includes the following attachments that are needed:

• 1: "Watts Bar Area Topo.pdf'

• 0: "Watts Bar Rating Curves Rev4.xIsm" o

Worksheet: "Weir 7 Crit Discharge" o

Worksheet: "Weir 7 Rating Curve" o

Worksheet: "Additional Weirs" 6.0 "CDQ000020080009. PDF" "Calc_CDQ000020080009_Dam_RatingCurveFortLoudounRev_3,15Junl2.pdf",

which includes a discussion of the methods applied to account for rim leak around Fort Loudoun Dam. This calculation package also includes the following attachments that are needed:

Attachment:

16 - "Fort Loudoun DRCRev3.xls" o

Worksheet: "Additional Weir Flow"

" 7 - "Fort Loudoun Area Topo.pdf' E1-2

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ENCLOSURE TVA Response TVA is providing the requested updated calculation packages in electronic format via the enclosed OSM (Attachment OSM-1). Each file is password protected, please contact Edward D. Schrull at (423) 751-3850 for the password. The contents of the OSM follow:

File Name File Size 1CDQ000020080054 R3 Body Only.pdf 11, 305 KB 2

2_CDQ000020080054 R3 Appendix H 21,400 Sq-Mi.pdf 7,161 KB 3 thru 5_CDQ000020080054 R3 Appendix H-H documents.pdf 2,125 KB (with attached Excel files)

- 3_CDQ000020080054 R3 Appendix H-H 21400 Segment 1 189 KB 3

Elevation and Discharge Data.xlsx

- 4_CDQ000020080054 R3 Appendix H-H 21400 Segment 2 5,241 KB Elevation and Discharge Plots Requested.xlsx

- 5_CDQ000020080054 R3 Appendix H-H 21400'Segment 2 70 KB Maximum Profile Plots Requested.xlsx 4

6_CDQ000020080054 R3 Appendix G 7,980 Sq-Mi,Bulls Gap June.pdf 4,935 KB 7_CDQ000020080054 R3 Appendix G-G documents.pdf 155 KB 5

(with attached Excel file)

- 7_CDQ000020080054 R3 Appendix G-G 7980_BGJUNSegment 2_Elevation and Discharge Data.xlsx 146 KB 6

8_CDQ000020080054 R3 Appendix M 7,980 Sq-Mi Bulls Gap March.pdf 6,929 KB 9 and 10_CDQ000020080054 R3 Appendix M-M documents.pdf 311 KB (with attached Excel files) 7

- 9_CDQ000020080054 R3 Appendix M-M 7980BGMARSegment 189 KB 1_Elevations and Discharge Data.xlsx

- 10_CDQ000020080054 R3 Appendix M-M 7980BGMARSegment 139 KB 2_Elevations and Discharge Data.xlsx 8

11_CDQ000020080020 R4 Body Only.pdf 8,783 KB 9

12_CDQ000020080020 R4 Attachment 21 Watts Bar Area Topo.pdf 9,444 KB 13_CDQ000020080020 R4 Attachment 20.pdf 189 KB 10 (with attached Excel file)

- 13_CDQ000020080020 R4 Attachment 20 Watts Bar Rating Curves 181 KB Requested.xlsm 11 14_CDQ000020080009 R3 Body Only.pdf 4,791 KB 15_CDQ000020080009 R3 Attachment 16.pdf 34 KB 12 (with attached Excel file)

- 15_CDQ000020080009 R3 Attachment 16 Fort Loudon DRC 99KB Additional Weir Flow.xls 13 16 CDQ000020080009 R3 Attachment 17 Fort Loudon Area Topo.pdf 1,352 KB 14 Attachment OSM-1 lndex.pdf 19 KB E1-3