ML20216J601

Monthly Operating Repts for Aug 1997 for Sequoyah Nuclear Plant

ML20216J601
Person / Time
Site:	Sequoyah
Issue date:	08/31/1997
From:	Hollomon T, Salas P TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9709170372
Download: ML20216J601 (10)

Text

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IUA levestee Va!ty AAvity Post ONe Bca 2000 ScdJr Da+, lewessee 3F]79 September 11, 1997 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket Nos.50-327 Tennessee Valley Authority ) 50-320 SEQUOYAH NUCLEAR PLANT (SQN) - AUGUST 1997 MONTHLY OPERATING REPORT

( Enclosed is the August 1997 Monthly Operating Peport as required by SON Technical Specification 6.9.1.10.

If you have any questions concerning this matter, please telephone me at (423) 843-7170 or J. D. Smith at (423) 843-6672.

Sincerel , _ ,

/ ,

Pe o Salas Site Licensing and Industry Affairs Manager

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Enclosure cc: See page 2 9709170372 970831 ADOCK 05000327

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.U.S. Nuclear Regulatory Commission Page 2 September 11, 1997 cc (Enclosure):

Mr. R. W. Hernan, Project Manager U.S. Nuclear Regul6 tory Commission One-White Flint, North 11555 Rockville Pike Rockville, Maryland 20052-2739 INPO Records Center i Institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, Georgia 30339-5947 Ms. Barbara Lewis, Assistant Editor, Database McGraw-Hill, Inc.

1200 G Street, NW, Suite 1100 Washington, D.C. 20005 *

, Mr. James Lang, Manager i i

Advanced Reactor Department Electric Power Research Institute 3340 Hillview Avenue-Palo Alto, California 94304 NRC Resident Inspector

_ .Sequoyah Nuclear Plant. 3 1

2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II Atlanta Federal Center 61 Forsyth St., SW, suite 23T85 '

Atlanta, Georgia 30303-3415-

TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT MONTHLY OPERATING REPORT TO THE NUCLEAR REGULATORY cot 44ISSION AUGUST 1997 UNIT 1 DOCKET NUMBER 50-327 LICENSE NUMBER DPR-77 I

UNIT 2 DOCKET NUMBER 50-328 LU1!1NSE NUMBER DPR-79 i

OPERATIONAL

SUMMARY

AUGUST 1997 UNIT 1 Unit 1 generated 811,591 megawatthours (MWh (gross) electrical power during August with a capacity factor of 94.45 percent.

On-August 1 at 1929 EDT, Operations personnel received a low control air header pressure alarm. While implementing a modification to improve the materiel condition of the Control and Service Air System, the control air header pressure dropped rapidly after Modifications personnel cut into a six-inch control air header located inside an equipment clearance

-boundary. At 1930 EDT, service sir and nonessential air automatically 1 isolated. The loss of control air pressure resulted in a runback of the Units 1 and 2 turbines and instabilities in Unit 1 secondary side flows sufficient to warrant a manual trip of the Unit i reactor. At 1936 EDT, Operations personnel manually tripped the Unit i reactor. '

Unit i reactor was taken critical on August 2 at 2059 EDT, and the generator was synchronized to the grid on August 3 at 0459 EDT. Unit i reached 100 percent reactor power on August 4 at 0151 EDT. Unit 1 was operating at 100 percent power at the end of August.

UNIT 2 Unit 2 generated 847,666 MWh (gross) electrical power during August with a capacity factor of 98.64 percent.

On August 1 at 1936 EDT, Unit 2 experienced a runback to approximately 80 percent reactor power. The runback was the result of a loss of control air as described above in the Unit 1 performance summary. Unit 2 was operating at 100 percent power on August 2 at 0900 EDT.

On August 23 at 1150 EDT, Unit 2 started coastdown to the Unit 2 Cycle 8 refueling outage. Unit 2 was operating at 94 percent reactor power at ,

the end of August.

SUMMARY

OF POWER-OPERATED RELIEF VALVES (PORVs) AND SAFETY VALVES CHALLENGES No PORVs or safety valves were challenged in August.

I

4 AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50 327_ UNIT NO. One DATE: 09-03 97 COMPLETED BY: T. J. llollomon TELEPilONE: (423) 843 7328 MONTil: AUGUST 1997 l AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net) DAY (MWe-Net) 1 926 17 1121 2 -14 18 1131 3 421 19 1132 4 1114 20 1129 5 1118 21 1119 6 1116 22 1133 7 1118 23 1133 8 1119 24 1122 9 1120 25 1126 10 1123 26 1127 11 1122 27 1122 12 1123 28 1126 13 1124 29- 1124 14- 1122 50 1122 15 1121 31 1124 16 1122

4 AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-328 UNIT NO. Two DATE: 09-03-97 COMPLETED BY: T. J. llollomon TELEPliONE: (423) 843 7528 i MONTil: AUGUST 1997

- AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe Net) DAY (MWe-Net) 1 1075 17 1117-2 1066 18 1127 3 1118 19 1128 4 1117 20 1124 5 1109 21 1128 6 1114 22 1127 7 1114 23 1122 8 1115 24 1102

-9 1118 25 1096 10 1120 26 1087 11 1119 27 1075 12- 1120 28 1072 13 1123 29 1065 14 1117 30 1057 15- 1116 31 1050 16 1117

4 OPERATING DATA REPORT DOCKET NO. 50-327 DATE 09/04/97 COMPLETED BY T. J. liollomon i TELEPilONE . (423) 843-7528 QPERATING STATUS

1. Unit Name: Scauovah Unit One

2. Reporting Period: August 1997

3. Licensed Thermal Power (MWt): 3411.0

4. Nameplate Rating (Gross (MWe): 1220.6

5. Design Electrical Rating (Net MWe): 1148o

6. Maximum Dependable Capacity (Gross MWe): 1155 0

7. Maximum Dependable Capacity (Net MWe): 1117.0

8. If Changes Occur in Capacity Ratings (Item Numbers 3 Through 7) Since Last Report, Give Reasons:

9. Power Level to Which Restricted, If Any (Net MWe): N/A

10. Reasons for Restrictions, if Any: N/A This Month Yr-to-Date Cumulative

11. Ilours in Reporting Period 744 5.831 141,744

12. Number ofIlours Reactor Was Critical 718.7 4,604.0 81,927

13. Reactor Reserve Shutdown liours 0 0 0

14. liours Generator On-Line 710.7 4,559.0 80,130.6

15. Unit Reserve Shutdown flours 0 0 0

16. Gross Thermal Energy Generated (MWh) 2,394,700.6 14,907,496.7 261,262,484

17. Gross Electrical Energy Generated (MWh) 811.591 5,152,428 88,944,568

18. Net Electrical Energy Generated (MWh) 786,415 4,975,152 85,352,790

19. Unit Service Factor 95 5 78.2 56.5

20. Uni tAvailability Factor os 6 78 2 56.5

21. Unit Capacity Factor (Using MDC Net) 94.6 76 4 53 0

22. Unit Capacity Factor (Using DER Net) 92.1 74.3 52.5

23. Unit Forced Outage Rate 4.5 0.7 30.8

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each): N/A

25. If Shut Down At End of Report Period, Estimated Date of Startup: N/A

...m.

1

, OPERATING DATA REPORT DOCKET NO. 50-328 DATE .D934/97 COMPLETED BY T. J. Hollomon TELEPilONE (423) 843 7528

] OPERATING STATUS 1.- Unit Name: Senunvah Unit Two

2. Reporting Period: Aumat 1997 j 3 Licensed Thermal Power (MWt): 3411 0

4. Nameplate Rating (Gross (MWe): 1220 6

5. Design Electrical Rating (Net MWe): 1148 0

, 6. Maximum Dependable Capacity (Gross MWe): , -1155.0 -

7. Maximum Dependable Capacity (Net MWe): ,_ 1117.0

. 8. If Changes Occur in Capacity Ratings (ltem Numbers 3 Through 7) Since Last Report, Give Reasons:

1

! 9. Power Level to Which Restricted, If Any (Net MWe): N/A l

- 10. Reasons for Restrictions, if Any: N/A  !

a i This Month Yr-to-Date Cumulative i . .

11. Ilours in Reporting Period 744 5.831 133.704 l 12. Number ofliours Reactor Was Critical 744.0 5,831.0 85,433 l 13. Reactor Reserve Shutdown Hours 0 0 0

14. Ilours Generator On-Line 744.0 5,810.7 83,483.2 >

l 15. Unit Reserve Shutdown Hours 0 0 0 ,

16. Gross Thermal Energy Generated (MWh) 2,496,364.8 19,522,286.3 267,261,940 '

i. . 17. Gross Electrical Energy Generated (MWh) 847,666 6,708,697 90,907,754-

! -' I8. Net Electrical Energy Generated (MWh) 822,490 6,490,997 87,170,716 j 19. Unit Service Factor 100.0 99.7 62.4 ,

J 20. Unit Availability Factor 100 n 99.7 62 4 L 21.l Unit Capacity Factor (Using MDC Net) _ 99.0 99.7 58.4 -

! 22. Unit Capacity Factor (Using DER Net) 96.3 97.0 56.8 23, Unit Forced Outage Rate _

0.0 0.3 29.7

. 24< Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Unit 2 Cycle 8 Refuelina Outane is scheduled to begin in October 3.1997 with a duration of 40 days. '

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!. 25. If Shut Down At End of Report Period, Estimated Date of Startup: N/A l

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DOCKETNO: % -327

• UNTT NAME: One

• UNTT SHUTDOWNS AND POWER REDUCTIONS DATE- 09M97 ~ .

COMPL'iTED BY: T J Honomon REPORTMONTIL AUGUST 1997 TI1EPHONE- (423) 843-7528 2

No. Date Type' Outage Reason Method of Ixensee System Cumpuuud Cause and Correctne Acton to Prornt Duration Shutting Ennt Report Code

• Code' R-.un (Hours) Down No.

Reactor' 4 970801 F 33.4 A 2 50-327/97012 LF VLV On August I at 1938 EDT, Unit I reacsor was nianually tnpped by cperators. During iruvk. ua.iion of a modiTx:stion to the Control and Senice Air System the control air header pressure dromed rapuffy after Modificatens vu mma cut into a six-inch control air headerlocated insade an w=vmua chduuura! ,. Thecause of the cwnt is an iryu ie work Lum =1.uy -

dunng performance of the work actmty.

The W.bp iu work tv==1.uy was the result of the pocr materiel condition in the sysem. Corrent actions include- 1) the removal of corrosson buildup in the affected portions of the sysem. 2) an inspecten of other portens of the air system. for excessnt wuumm. 3) an saluation of the adcquacyand f.why ofprotntne maintenarxt (PMs) on the affected portions of the system and. 4) roisson of the PMs. as

.prveu ie.

I

'F; Forced 2 Reason hiethod 'Edubit G-Instmctens S: Scheduled A-Eympmcr4 Failure (Explain) 1-Manual for P.e.i.us of Data B-Maintenance or Test 2-Manual Scram Entry sixets for Lacensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regnlatory Restriction 4-Contmuation of Existing Outage (NUREG-1022)

E-OperatorTraining and 1xense Exam 5-Reducten F-Administratne 9-Other tdiiis I- Same Scurm G-Operational Error (Explain)

H-Other (Explain)

~

DOCKET NO.: 50-32s UNTTNAME: Tuo -*

• UNIT SHUTDOWNS AND POWER REDUCTIONS DA"IE O!h0LS T .

COMPLETED BY: T. I Holim REPORTMONDL AUGUST 1997 TELEPHONE (423)543-752s 2

No. Dale Type' Outage Reason Method of Iacensee 53ssem Component Cause am. Cm.e4 Achon to Proemt Durabon Frmttmg Ewat Code

• Code' Recantar (Hours) Down Repost No.

Reactor' There were no outages or power rnhartons of grenser than 20 percent in the average daily powerloti denng Ap

'F: Forced 2

Rease -h *Exhitzt G-Instrechons 5: Scheduled A-Eqmpment Failure (Explam) 1-Manual for Preparabon ofData B-Maneenance orTest 2-Manual Scram Entry sheets for Licensee C-Refueling 3-Automanc Scram Event Report (LER) F:lc D-Reg =Iwory Restnchon 4-Comannushon ofExisting Outage (NUREG-1022)

E-Operator Training and Lacense Exam 5-Redwtwo F-Adonianstratne 9-Other ' Exhibit I- Samme Source G-Operahonal Error (Explain)

HOhcr (Explain)

_