ML20086S330

Rev to Monthly Operating Repts for June 1995 for Sequoyah Nuclear Plant

ML20086S330
Person / Time
Site:	Sequoyah
Issue date:	06/30/1995
From:	Hollomon T TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20086S002	List: ML20086S000 ML20086S330
References
NUDOCS 9508010182
Download: ML20086S330 (8)

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TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT MONTHLY OPERATING REPORT TO THE NUCLEAR REGULATORY COMMISSION JyNE 1995 l

UNIT 1 DOCKET NUMBER 50-327 ,

LICENSE NUMBER DPR-77 UNIT 2 DOCKET NUMBER 50-328 LICENSE NUMBER DPR-79 l

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OPERATIONAL

SUMMARY

l JUNE 1995 UNIT 1 ,

5 Unit 1 generated 701,510 megawatthours (MWh) (gross) electrical power

. during June with a capacity factor of 84.65 percent.

At 0327 EDT on June 23, a reactor trip occurred as a result of a lo-lo level on a steam generator. During the process of establishing a clearance for a maintenance activity on a radiation monitor, an auxiliary unit operator (AUO) opened the wrong breaker. This resulted in a loss of power to reactor protection set 1. The loss of power to the protection set caused a reduction in feedwater flow resulting in decreasing levels in the steam generators and subsequent reactor trip. Unit 1 was taken critical on June 24 at 0600 EDT and was tied online at 1329 EDT that same day.

At 1308 EDT on June 29, with Unit 1 operating at 98 percent reactor ',

power, a power decrease was initiated as a result of problems with the IB main feedwater pump. Reactor power was reduced to approximately 65 percent to allow the pump to be removed from service for repairs. At 1945 EDT, after receiving frequent alarms on quadrant power tilt ratio, further power reduction was initiated to 48 percent reactor power.

Unit 1 was operating at 48 percent at the end of June.

UNIT 2 Unit 2 generated 771,830 megawatthours (MWh) (gross) electrical power during June with a capacity factor 93.5 percent- Unit 2 was offline because of a turbine trip / reactor trip that occurred on May 31. Unit 2 returned to operation on June 2 at 0722 EDT. ,

Unit-2 was operating at 99.5 percent reactor power at the and of June.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-327 UNIT No. One DATE: 07-05-95 COMPLETED BY: T. J. Hollomon TELEPHONE: (615) 843-7528 MONTH: JUNE 1995 i

AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL R&I (MWe-Net) phy (MWe-Net) 1 1137 17 1094 2 1138 18 1035 3 1137 19 1118 4 1135 20 1124 5 1129 21 1127 6 1128 22 1127 7 1131 23 133 8 1115 24 56 9 1128 25 416 10 1129 26 495 l 11 1129 27 519 l 12 1127 28 826 13 1065 29 891 14 1036 30 499 15 1028 31 N/A 16 1012

AVERACE DAILY UNIT POWER LEVEL DOCKET NO. 50-328 UNIT No. Two DATE: 07-05-95 COMPLETED BY: T. J. Hollomon TELEPHONE: (615) 843-7528 MONTH: JUNE 1995 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net) R&L (MWe-Net) 1 -37 17 1047 2 193 18 1082  ;

3 922 19 1105 4 1109 20 1106 5 1117 21 1108 6 1115 22 1107 7 1113 23 1107 8 1115 24 1108 9 1117 25 1109 10 1114 26 1109 11 1115 27 1109 12 1109 28 1104 13 1104 29 1100 14 1109 30 1103 15 1108 31 N/A 16 1109

OPERATING DATA REPORT DOCKET NO. 50-327

• DATE 07/05/95 COMPLETED BY T . J . Ho' lomon TELEPHONE (615) 843-7528 OPERATING STATUS l Notes l

1. Unit Name: Seouovah Unit One l l

2. Reporting Period: June 1995 l l

3. Licensed Thermal Power (MWt): 3411.0 l l

4. Nameplate Rating (Gross MWe): 1220.6 l l

5. Design Electrical Rating (Net MWe): 1148.0 l l

6. Maximum Dependable Capacity (Gross MWe): 1151.0 l l

7. Maximum Dependable Capacity (Net MWe): 1111.0 l  !

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 4.343 122.712

12. Number of Hours Reactor Was Critical 693.5 4.120.1 66.170

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On-Line 686.0 4.098.2 64.702.5

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWH) 2.063.579.5 13.480.910.6 .111.056.908

17. Gross Electrical Energy Generated (MWH) 701.510 4.671.870 71,722.754

18. Net Electrical Energy Generated (MWH) 675.044 4.512.045 68.775.458

19. Unit Service Factor 95.3 94.4 52.7

20. Unit Availability Factor 95.3 94.4 52.7

21. Unit Capacity Factor (Using HDC Net) 84.4 93.5 50.4

22. Unit Capacity Factor (Using DER Net) 81.7 90.5 48.8

23. Unit Forced Outage Rate 4.7 5.6 35.3

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

Unit 1 Cvele 7 refuelina outaae is scheduled to becin September 9.1995. with a duration of 50 days.

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

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OPERATING DATA REPORT DOCKET NO. 50-328 DATE 07/05/95 COMPLETED BY T. J. Ho11amon  ;

TELEPHONE f615) 843-7528 j OPERATING STATUS l Notes l ,

1. Unit Name: Seauovah Unit Two l l

2. Reporting Period: June 1995 l l

3. Licensed Thermal Power (Wt): 3411.0 l l }

4. Nameplate Rating (Gross We): 1220.6 l l ,

5. Design Electrical Rating (Net We): 1148.0 l l

6. Maximum Dependable Capacity (Gross We): 1146.0 l l

7. Maximum Dependable Capacity (Net We): 1106.0 l l

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

9. Power Level To Which Restricted, If Any (Net We): N/A {

10. Raasons For Restrictions If Any: N/A l

This Month Yr-to-Date Cumulative l

11. Hours in Reporting Period 720 4.343 114.672

12. Number of Hours Reactor Was Critical 697.8 3.845.7 68.202

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On-Line 688.6 3.731.1 66.440.8

15. Unit Reserve Shutdown Hours 0 0 0 3

16. Gross Thermal Energy Generated ( WH) 2.276.770.1 12.301.339.2 209.828.802 7 ,

17. Gross Electrical Energy Generated (WH) 771.830 4.214.403 71.222.012 ,

18. Net Electrical Energy Generated (HWH) 744.334 4.0 % .175 68.170.357  :

19. Unit Service Factor 95.6 85.9 57.9 [

20. Unit Availability Factor 95.6 85.9 57.9

21. Unit Capacity Factor (Using MDC Net) 93.5 84.4 53.8

22. Unit Capacity Factor (Using DER Net) 90.1 81.4 51.8

23. Unit Forced Outage Rate 4.4 14.1 34.2

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

25. If Shut Down At End Of Report Period, Estimated an te of Startup: l l

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DOCKET NO: 50-327 UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME: One DATE: 07/07/95 i-REPORT MONTH: June 1995 COMPLETED BY:T. J. Hol10 mon ~ ,

TELEPHONE:1615) 843-7528 Method of Licensee Cause and Corrective P4 ation Shutting Down Event System Component Action to No. Date Type l  !(Hours) Reason 2

Reactor Report No. Code # Code 5 Prevent Recurrence .

2 950623 F 34.0 G 3 50-327/ At 0327 EDT on June 23, a reactor 95008 trip occurred as a result of a lo-lo level m a steam generator.

During the process of establishing a clearance for a maintenance activity on a radiation monitor, an auxiliary unit operator (AUD) opened the wrong breaker. This resulted in a loss of power to reactor protection set 1. The loss of poweN to the protection set caused a reduction in feedwater flow resulting in decreasing levels in the steam generators and sub-sequent reactor trip. Unit I was taken critical on June 24 at 0600 EDT and was tied online at 1329 EDT that same day.

s 950629 F A 5 At 1308 EDT on June 29, with Unit 1 operating at 98 percent reactor power, a power decrease was initiated as a result of problems with the 18 main feedwater pump.

Reactor power was reduced to approximately 65 percent to allow 1 the pump to be removed from service for repairs. At 1945 EDT, af ter receiving frequent alarms on quadrant power tilt ratio, further power reduction w3s initiated to 48 percent reactor power. Unit I was operating at 48 percent at the end of June.

2 3Method: 4 I:F Forced Reason: 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 C-Refueling 3-Automatic Scram Event Report (LER) File D-Regu1Ltory Restruction 4-Continuation of Existing Catage .(NUREG-1022)

E-Operator Training and License Examination 5-Reduction F-Administrative 9-Other G-Operational Error (Explain) 5 Exhibit I-Same Source H-Other (Explain)

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DOCKET NO: 50-328 UNTT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME: Iwo -

DATE: 07/07/95 .

REPORT MONTH: June 1995 COMPLETED BY:T. J. Hollomon .

TELEPHONE:(615) 843-7528 Method of Licensee Cause and Corrective Duration Shutting Down Event System Component Action to Type l d 5 No. Date (Hours) Reason 2 Reactor3 Report No. Code Code Prevent Recurrence ,

6 950601 F 31.4 N/A 4 50-328/ TJ TS Unit 2 was offline because of a 95003 turbine trip / reactor trip that occurred oc May 31. Unit 2 returned to operation on June 2 at 0722 EDT.

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2 Reason: 3 Method: 4 I:F Forced Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation cf Data '.

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

E-Operator Training and License Examination 5-Reduction F-Administrative 9-Other G-Operational Error (Explain) 5 Exhibit I-Same Source H-Other (Explain) l

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