ML20115H037

Monthly Operating Repts for June 1996 for SQN

ML20115H037
Person / Time
Site:	Sequoyah
Issue date:	06/30/1996
From:	Hollomon T, Shell R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9607220192
Download: ML20115H037 (10)

Text

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En Tenressee Vapey Autionty Post Office Ek)x 2000. Soddy-D+sy Tennessee 37379 I

July 12,1996 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen: I In the Matter of ) Docket Nos. 50-327 i

! Tennessee Valley Authority ) 50-328 SEQUOYAH NUCLEAR PLANT (SON) - JUNE 1996 MONTHLY OPERATING REPORT Enclosed is the June 1996 Monthly Operating Report as required by SON Technical Specification 6.9.1.10.

If you have any questions concerning this matter, please telephone J. W. Proffitt at (423) 843-6651.

Sincerely, u Y, R. H. Shell Manager SON Site Licensing Enclosure cc: See page 2 9607200192 960630 PDR ADOCK 05000327 R PDR

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j U.S. Nuclear Regulatory Commission Page 2 July 12,1996 cc (Enclosure). j Mr. R. W. Hernan, Project Manager i U.S. Nuclear Regulatory Commission i One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 INPO Records Center institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, Georgia 30339-5957 Mr. James Lang, Manager Advanced Reactor Department Electric Power Research Institute 3340 Hillview Avenue

• Palo Alto, California 94304 NRC Resident inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region ll 101 Marietta Street, NW, Suite 2900 .

Atlanta, Georgia 30323-2711 l l

Mr. F. Yost, Director Research Services i Utility Data institute )

1200 G Street, NW, Suite 250 Washington, D.C. 20005

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TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT MONTHLY OPERATING REPORT TO THE NUCLEAR REGULATORY COMMISSION JUNE 1996 UNIT 1 DOCKET NUMBER 50-327 LICENSE NUMBER DPR-77 UNIT 2 DOCKET NUMBER 50-328 LICENSE NUMBER DPR-79

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OPERATIONAL

SUMMARY

JUNE 1996  ;

UNIT I I Unit 1 generated 768,008 megawatthours (MWh) (gross) electrical power during June with a capacity factor I

. of 92.7 percent. On June 12 at 2000 Eastern daylight time (EDT), a power decrease was initiated for repairs on the 1 A main feedwater pump control system. Reactor power was decreased to 63 percent. Reactor power  ;

increase was initiated at 1157 EDT on June 14, and the reactor was operating at 100 percent at 2005 EDT on l t

June 14.

On June 23 at 1714 EDT, the Unit I reactor tripped as a result of a failure of a 500-kilovolt switchyard Bus 1  !

Section I coupling capacitor potential device (CCPD). Following the investigation of the event and i verification that no other plant equipment had been damaged, the reactor was taken critical on June 24 at 1208 EDT. The failed CCPD was spared out-of-service with no affect on unit operation. Unit I was tied online on June 25 at 0307 EDT and reached 100 percent power at 2140 that day. l Unit I was operating at 100 percent reactor power at the end ofJune.

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UNIT 2 {

Unit 2 generated 497,598 megawatthours (MWh) (gross) electrical power during June with a capacity factor  !

of 60.3 percent. The Unit 2 Cycle 7 refueling outage ended on June 9 at 1824 EDT when the generator was j synchronized to the grid. The turbine was taken offline on June 10 at 1047 EDT for turbine overspeed testing i and turbine balancing. Unit 2 was tied to the grid on June 11 at 0255 EDT. l Unit 2 was operating at 100 percent reactor power at the end ofJune. l 1

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AVERAGE DALLY UNIT POWER LEVEL DOCKET NO. 50-327 UNIT NO. One DATE: 07-01-96 COMPLETED BY: T. J. Hollorran TELEPHONE: (423) 843-7528 MONTH. JUNE 1996 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net) DAY (MWe-Net)

I 1122 17 1123 2 1123 18 -

1121 3 1122 19 1121 I

4 1123 20 1121 5 1121 21 1124 6 1122 22 1124 7 1122 23 795 8 1119 24 -33 9 1121 25 539 10 1120 26 1122 11 1123 27 1123 l 12 1083 28 1126 13 686 29 1125 i 14 849 30 1123 15 1122 31 NA 16 1122

AVERAGE DAILY UNIT POWER LEVEL DOCKETNO. 50-328 ' UNIT NO. Two DATE: 07-01-96 L COMPLETED BY: T. J. Hollomon TELEPHONE: (423) 843-7528

' MGNTH JUNE 1996 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net) . DAY (MWe-Net) 1 -17 17 1112 2 -15 18 - 1112 3 -30 19 1106 4 '28

- 20 1114 5 -30 21 1124 6 -30 22 1125 l 7 _,, -3 2 23 1125 8 -30 24- 1127 9 50 25 1126 10 ,

67 26 1127 11 170 27 1124 12 299 28 1124 13 718 29 1124 14 835 30 1124 15 982 31 NA 16 1101

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I OPERATING DATA REPORT DOCKET NO. 5n 127 DATE 07/01/96 COMPLETED BY T. J. Hollomon TELEPHONE (423) 843-7528 OPERATING STATUS Notes

1. Unit Name: Seauovah Unit One

2. Reporting Period: In= 1006

3. Licensed Thermal Power (MWt): 341 to

4. Nameplate Rating (Gross (MWe): 1220.6

5. Design Electrical Rating (Net MWe): 11420

6. Maximum Dependable Capacity (Gross MWe): 1151.0

7. Maximum Dependable Capacity (Net MWe): 1111.0 ,

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. Hours in Reporting Period 720 4.367 131.496 l

12. Number of Hours Reactor Was Critical 701.1 4,051.3 72,946

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On-Line 686.1 3,984.7 71,211.1

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWh) 2,257,394.9 13,324,303.2 231,655,719

17. Gross Electrical Energy Generated (MWh) 768,008 4,592,700 78,758,045

18. Net Electrical Energy Generated (MWh) 739,820 4,428,652 75,512,799

19. Unit Service Factor 95 3 91.2 54.2

20. . Unit Availability Factor os 1 91.2 54.2

21. Unit Capacity Factor (Using MDC Net) 92 5 91.3 51.7

22. Unit Capacity Factor (Using DER Net) 89.5 88.3 50.0

23. Unit Forced Outage Rate 4.7 1.2 33.4

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

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

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OPERATING DATA REPORT DOCKETNO. 50-328 .

DATE 07/01/96 i COMPLETED BY T. J. Hollomon TELEPHONE (423) 843-7528 OPERATING STATUS 1 Notes  !

1. Unit Name: Seouovah Unit Two

2. Reporting Period: June 1996  :

3. Licensed Thermal Power (MWt): 34110

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

5. Design Electrical Rating (Net MWe): 1148.0

6. Maximum Dependable Capacity (Gross MWe): 1146.0 ,

7. Maximum Dependable Capacity (Net MWe): 1106.0  ;

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 Restri:tions, If Any: N/A This Month Yr-to-Date Cumulative ,

11. Hours in Reporting Period 720 4,367 123.456

12. Number of Hours Reactor Was Critical 547.0 3,187.2 75,781

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On-Line 493.5 3,133.7 73,909.9

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWh) 1,497,931.7 10,450,303.2 234,991,900

17. Gross Electrical Energy Generated (MWh) 497,598 3,620,838 79,844,610

18. Net Electrical Energy Generated (MWh) 473,146 3,485,286 76,487,155 19.' Unit Service Factor 68.5 71.8 59.9

20. Unit Availability Factor 6R 5 71.8 59.9

21. Unit Capacity Factor (Using MDC Net) 59.4 72.2 56.0

22. Unit Capacity Factor (Using DER Net) 57.2 693 54.0

23. Unit Forced Outage Rate 0.0 0.0 31.9

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

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

e DOCKET NO.: 50-327 UNIT NAME: One '

UNIT SHUrDOWNS AND POWER REDUCTIONS DATE: 07/01/96

• COMPLETED BY: T. J. Hollomon REPORT MONTH: JUNE 19% TELEPHONE: (423) 843-7528 >

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No. Date Type' Duration Reason

• Method of Licensee System Component Cause and Corrective Action to Prevent  !

(Hours) Shutting Event Report Code

• Code' Recurrence Down No.

Reactor' 1 l

6 960612 S N/A B 5 N/A N/A N/A On June 12 at 2000 EDT a power reduction to 63 percent was initiated for repairs on the

'l A main feedwater pump control system. [

The control system problem was the result  !

of the electro-hydraulic converter torque motor bearing being frozen up. The motor l

was replaced and reactor power increase  ;

wr; initiated at 1157 EDT on June 14.  !

7 960623 F 33.9 A 3 50-327/96006 EL XPT On June 23 at 1714 EDT the Unit I reactor 1 tripped as a result of a failure of a 500-kV switchyard Bus 1 Section 1 CCPD desice.

The cause of the failure appears to be degradation of the lower module causing stress on the other two modules, resulting in  ;

the failure. The CCPD was spared out-of- .

senice with no affect on unit operation.

The reactor was taken critical again on June 24 at 1208 EDT. Unit I was tied  !

online on June 25 at 0307 EDT. i e c 2

'F: Forced Reason: ' Method ' Exhibit G-Instructions I S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data ,

B-Maintenance or Test 2-Manual Scram Entry sheets for Licensee [

C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation of Existing Outage (NUREG-1022) t E-Operator Training and License Exam 5-Reduction 5

F-Administrative 9-Other Exhibit 1 - Same Source i G-Operational Error (Explain) l H-Other (Explain)  ;

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DOCKET NO.: 50-328 ,

UNIT NAME: Tun *-

UNIT SHUTDOWNS AND POWER REDUCTIONS DATE: 07/o1/96 COMPLETED BY: T. J. Hollomon REPORT MONTH: JUNE 1996 TELEPHONE: (423) 843-7528 2

No. Date Type' Duration Reason Method of Licensee System Component Cause and Corrective Action to Prevent d 5 (Hours) Shutting Event Code Codc Recurrence Down Report No.

8 Reactor 1 960601 S 210.4 C 4 N/A N/A N/a The Unit 2 Cycle 7 refueling outage ended on June 9 at 1824 EDT when the generator was synchronized to the grid.

2 960610 S 16.1 B 5 N/A N/A N/A The turbine was'taken offline on June 10 at 1047 EDT for turbine overspeed testing and turbine balancing. Reactor power was maintained at approximately 25 percent. ,

Unit 2 was tied to the grid on June 11 at ,

0255 EDT.

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'F: Forced Reason: ' Method ' Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data ,

B-Maintenance or Test 2-Manual Scram Entry sheets for Licensee l C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation of Existing Outage (NUREG-1022)

E-Operator Training and License Exam 5-Reduction 5

F-Administrative 9-Other Exhibit I- Same Source  :

G-Operational Error (Explain)  ;

H-Other (Explain)

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