ML20058M806

Monthly Operating Repts for Nov 1993 for Sequoyah Plant Units 1 & 2.W/931214 Ltr

ML20058M806
Person / Time
Site:	Sequoyah
Issue date:	11/30/1993
From:	Fenech R, Hollomon T TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9312210112
Download: ML20058M806 (11)

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l Tennessee Va4ey Autnonty. Post Offce fb 20'XL Soddy Daisy. Tenressee 373797J00 i

i Robert A. Fenech v.c eaesdent seaaayuh Nxcar Pielt j

December 14, 1993 U.S. Nuclear Regulatory Commission AT1W: Document Control Desk Washington, D.C. 20555 l

l Gentlemen:

In the Matter of ) Docket Nos. 50-327  :

Tennessee Valley Author 3.ty ) 50-328 SEQUOYAH NUCLEAR PLANT OiQN) - NOVEMBER 1993 MONTHLY OPERATING REPORT Enclosed is the November 1993 Monthly Operating Report as required by SQN Technical Specification 6.9.1.10. .

If you have any questions concerning this matter, please. call J. W. Proffitt at (615) 843-6651.

Sincerely. -

d Robert A. Fenech Enclosure cc: See page 2 1

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1 I i l' U.S. Nuclear Regulatory Commission .l Page 2 ,i December.14, 1993 cc (Enclosure): )

INPO Records Center <

Institute of Nuclear Power OperationsL y, 700 Calleria Parkway.  !

Atlanta, Georgia 30339-5957: :l t

Mr. D. E. LaBarge, Project Manager

- U.S. . Nuclear Regulatory Conunission ' .j One White Flint, North:

11555 Rockville' Pike y Rockville, Maryland 20852-2739-Mr. Ted Marston,. Director Electric Power Research' Institute 7j P.O. Box 10412 Palo Alto, California 94304 i NRC Resident Inspector -l Sequoyah Nuclear Plant ,

2600 I?,ou Ferry Road '1 Soddy-Daisy, Tennessee 37379-3624-Regional Administration U.S. Nuclear Regulatory Conunission Office of Inspection and Enforcement Region II ~

101 Marietta Street, NW, Suite 2900 'i Atlanta, Georgia 30323-2711  :

1 Regional Administrator l U.S. Nuclear Regulatory Conunission ]

Region II 'l l 101 Marietta Street, NW, Suite 2900 1 Atlanta, Georgia 30323-2711- 1 i

Mr. F. Yost, Director Research Services Ij Utility Data Institute 1700 K Street, NW, Suite 400 Washington, D.C. 20006-3800 I

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r TEMEESSEE VALLEY AUTHORITY ~!

9 NUCLEAR POWER GROUP  ;

SEQUDYAE NUCLEAR FIANT .)

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IRAITELY OPERATINC REPORT. i TU THE NUCIEAR REGUIATURY C0fftISSI(38 l NOFEftBER 1993 i

I UNIT 1 l .

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I DOCERT NtfIBER 50-327 'i LICENSE NtftBER DPR-77.

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l UNIT 2 I

6 DOCEET NIEtBER 50-328 l

LICENSE NUttBER DPR-79 1

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OPERATIONAL

SUMMARY

NOVEMBER 1993

. UNIT 1

! The Unit 1 Cycle 6 refueling outage continued. Unit I remained in Mode 5 at the end of November.

UNIT 2 l Unit 2 generated 468,680 megawatthours (MWh) (gross) electrical power

! during November with a capacity factor of 56.02 percent. Unit 2 was operating at approximately 49 percent reactor power and increasing at the beginning of November and reached 100 percent reactor power on November 5 at 0545 EST.

At 2115 EST on November 5, a power level decrease to 30 percent was initiated to allow repairs on the excitation system to be performed. On Novesber 8 at 1921 EST, the Unit 2 generator was removed from the grid for exciter work.

Unit 2 was returned to service on November 10 at 0417 EST when the generator was tied to the grid. Reactor power level was at approximately 25 percent.

Unit 2 reached 100 percent reactor power on November 12 at 0557 EST.

On November 16 at 0913 EST, a reactor shutdown to Mode'4 was initiated as a l result of thermal barrier check valve issues. At 2217 EST that day, the unit vas removed from the grid. Unit 2 entered Mode 2 at 2245 EST and entered l

Mode 3 at 2330 EST on November 16. Unit 2 entered Mode 4 on November 17 at 1847 EST.

On November 20, startup was initiated. Unit 2 entered Mode 3 on November 22 l at 0132 EST, and the reactor was taken critical at 1814 EST.that day. Urdt 2 entered Mode 1 on November 23 at 0256 EST and was returned to service that day at 0852 EST when the generator was tied to the grid. Unit 2 reached 100 percent reactor power on November 27 at 0340 EST.

Unit 2 was operating at 100 percent reactor power at the end of November.

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AVERACE IIAILY UNIT POWR LEVEL DOCKET NO. 50-327' UNIT No. One DATE:- 12-04-93 COMPLETED BY: T. J, Hollomon TELEPHONE: '(615) 843-7528 l MONTH: NOVEMBER 1993 i

i AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL-  !

pH (MWe-Net) DM (MWe-Net) -j i

-i 1 -1 '17 '-28  ;

i 2 -1 -18 -19 3 -5 19 -16  ;

4 -2 20 -19  !

5 -2 21 -23 ,

i 6 -2 22 -33 7 -2 23- l 8 -16 24 _ -1 .!

i 9 -26 25 -1  ;

10 -16 26 -1 11 -2 27 -1 4

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-i 12 -1 28 -1 1 13 -2 29' -1 14 -1 30 15 -1 31 N/A 16 -7 -

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-i AVERAGE MILY llNIT POWER LEVEL j DOCKET NO. 50-328 UNIT No. 'Two vale: 12-04-93 ,

COMPLETED BY: T. J. Hollomon TELEPHONE: (615) 843-7528' l i

MONTH: NOVEMBER 1993 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL i DAY (MWe-Net) I DAY Q9(e-Net)-

1 1167 17- -2 2 820 18 -5  !

3 894 ~19- -5 4 1058 20 -2 5 1114 21 -5 t

6 527 12 2 7 421 23 124 i 8 277 24 386 $

9 -2 ,_ 25 623 10 266 26' 695 11 858 27 1130 i

12 1109 28 1133 l, 13 1124 29 1131 .

14 1126 30 1125'  !

i 15 1128 31 N/A 16 762 l

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. OPERATING DATA REPORT -i DOCKET NO. _50-327'- .i DATE 12/04/93 4 COMPLETED BY:. T. J. Hollomon i iTELEPHONE'- (6151 843-7528 f i

QEf, RATING STATUS l Notes .- l- e

1. Unit Name: _ 1gguoyah Unit One -l. l'

2. Reporting Period: November 1993' l l. .l

3. Licensed Thermal Power (MWt): 3411.0 l 1l; l

4. Nameplate Rating (Gross MWe): _1220.6 l. ll l

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

6. Maximum Dependable Capacity (Gross MWe): 1162.0' l -- l j

.l l 7. Maximum Dependable Capacity (Net MWe): 1122.0 l

8. If Changes Occur in Capacity Ratings (Item Numbers 31hrough 7) Since'Last' Report,?Give Reasons:

9. Power Level To Which Restricted, If Any (Net MWe): N/A 5

10. Reasons For Restrictions, If Any: N/A 3 a

l This Month Yr-to-Date CumulativeL

11. Hours in Reporting Period -720 -8.016- 108.865 c

12. Number of Hours Reactor Was Critical 0' 1.281.3~ 56.029 '!

13. Reactor Reserve Shutdown Hours 0 0 0 l

14. Hours Generator On-Line 0- '1.220.6- 54.828.5  !

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWH)' 0 3.915.909.5 '

178.893.754  !

17. Gross Electrical Energy Generated (MWH) 0 1.358.540 60.702.654

18. Het Electrical Energy Generated (IMI) -6.048~ -1.248.787: 58:171.009~ 'j

19. Unit Service Factor 0 15.2 50.4 .{

20. Unit Availability Factor 0 '15.2 ' 50.4> j

21. Unit Capacity Factor (Using MDC Net). 13.9'

-0.7 '47.6'

22. Unit Capacity Factor (Using DER Net) -Os 7 13.6 46.5

23. Unit Forced Outage Rate 0 47.5' 38.7

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

25. If Shut Down At End Of Report Period. Estimated Date of Startup: February 1. 1994' l

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t OPERATING DATA REPORT l

I DOCKET ~NO. _10-J28 ,

'DATE 12/04/93

' COMPLETED BY 1. J. Hollomon TELEPHONE f6151 843-7528 I

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l Of1FA11NG STATUS l Notes l

1. Unit Name: ..Seavoyah Unit Two l 'l' i 2. Reporting Period: November 1993 l l

3. Licensed Thermal Power (HWt): 3411.0 l l l 4. Nameplate Rating (Gross HWe): 1220.6 l -l '

l S. Design Electrical Rating (Net HWe): 1148.0 l l

6. Maximum Dependable Capacity (Gross HWe): 1162.0 l' ,l l 7. Maximum Dependable Capacity (Net HWe): 1122.0 l l 3

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

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I 9. Power Level To Which Restricted If Any (Net HWe): N/A

10. Reasons for Restrictions, If Any: N/A ,

This Month .Yr-to-Date' Cumulative

11. Hours in Reporting Period 720 8.016 100.825

12. Number of Hours Acactor Was Cr;tical 581.3 2.068.3 58.281

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On-Line 532.5 1;801.3 56.878.7

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (HWH) 1.401.901.4 5.312.980.0 178.494.759 '

17. Gross Electrical Energy Generated (HWH) 468.680 1.785.463 60.508.582

18. Net Electrical Energy Generated (HWH) 448.190 1.661.627 57.876.902

19. Unit Service Factor __ 74.0 22.5 56.4

20. Unit Availability Factor 74.0 22.5 56.4

21. Unit Capacity Factor (Using HDC Net) 55.5 18.5 51.2

22. Unit Capacity Factor (Using DER Net) 54.2 18.1 50.0

23. Unit Forced Outage Rate 2fiQ___ 77.5 37.1

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

Unit 2 Cvele 6 Refuelino Outtge. April 1. 1994. 65' Days

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

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d-DOCKET NO: 50-327 o UNIT SWJTDOWHS AND POWER REDUCTIONS UNIT NAME: One .

DATE: 12/03/93 "

REPORY NONTH: November 1993 COMPLETED BY:T. J. Hollomon TELEPHONE:f6151 843-7528 Method of Licensee Cause and Corrective 1 Duration Shutting Down Event System Comp nent Action to No. Date Type l (Hours) Reason 2 Reactor 3 Report No. Code 4

Code Prevent Recurrence 4 931101 5 720 C 4 N/A N/A N/A The Unit 1 Cycle 6 refueling outage continued.

- F: Forced; 2 Reason 3Method:

. ..dExhibit G-Instructions. ,

5: Scheduled- A-Equipment Failure (Explain) 1-Manual .for Preparation of Data 8-Maintenance'or Test- l2-Manual Scram- ' Entry sheets for Licensee-C-Refueling -

,3-Automatic Scram Event Report (LER) File.~ ,.

D-Regulatory Restruction' 4-Continuation of. Existing Outage '(NUREG-lO22)

E-Operator. Training and -License Examination 5-Reduction .-.

F-Administrative 9-Other-5 G-Operational Error (Explain) Exhibit I-Same' Source J

. H-Other . (Explain) '.

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00CXET NO: 50-328 UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME: Two ,

DATE: 12/03/93 REPORT NONTH: November 1993 COMPLETED BY:7. J. Hollomon TELEPHONE:f615) 843-7528 Method of Licensee Cause and Corrective Ouration Shutting Down Event System Compgnent Action to No. Date Type l (Hours) Reason 2 Reactor 3 Report No. Code 4

Code Prevent Recurrence ,

5 931101 F B 4 N/A N/A N/A At the beginning of November, Unit 2 was increasing power after an outage for voltage regulator repairs. l Unit 2 reached 100 percent power on November 5 at 0545 EST. .

6 931105 F 4.6 B 5 N/A At 2115 EST on November 5,' a reactor  !

power decrease to 30 percent was 1 initiated to allow excitation system repairs to be performed. On November 8 at .1921 EST, the Unit- 2 generator was removed from the grid i for exciter work. Problems with the compensator card, minimum excitation L limitor card, transformer card, and logic drawer were identified. These components were replaced and the system was tested and determined to operable. Unit 2 was returned to service on November 10 at 0417 EST when the generator was once again tied to .the grid. Reactor power level was at approximately 25 per-cent. Unit 2 reached 100 percent 4 reactor power on November 12 at . 1 0557 EST.

7 931116 F 21.5 B 1 327/93029 CC 1SV On November 16 at 0913 EST, a reactor shutdown to Mode 4 was initiated as a result of a thermal barrier check valve issue. Seven of the eight check valves were stuck in the open position. The cause of the condition was oxide wedging (iron oxide corrosion build--up) between valve components (piston and bonnet). The valves were 2 Reason: 3 Hethod: 4 I:F Forced Exhibit G-Instructions 5: Scheduled .A-Equipment Failure (Explain) 1-Mandal for Preparation of Data B-Maintenance or Test 2-Manual Scram Entry sheets for Licensee C-Re fueling 3-Automatic Scram Event Report (LER) File D-Regulatery Restruction ' 4-Continuation of Existing Outage. (NUREG-1022)  ;

-E-Operator Training and License Examination 5-Reduction F-Administrative 9-Other 5

G-Operational Erro? (Explain) Exhibit I-Same Source H-Other (Explain) j

DOCKET NO: 50-328 UNIT SHUTDOWNS AND 10WER REDUCTIONS UNIT NAME: Two .

DATE: 12/03/ E,__

REPORT MONTH: November 1993 COMPLETED BV:T. 1 Mallamon

• TELEPHONE:(6151 843-7528 Method of Licensee Cause and Corrective Duration Shutting Down Event System Component Action to No. Date Type l Reason 2 Reactor 3 Report No. Code 4

Code 5 Prevent Recurrence (Hou rs) ,

7 931116 F 21.5 B 1 327/93029 CC ISV disassembled, cleaned, repaired, and cont. returned to service. A long-term action plan is being developed to ensure continued check valve oper-ability. Unit 2 entered Mode 1 on November 23 at 0256 EST and was returned to service.

'I F: Forced '2 Reason: 3 Method: 4 Exhibit G-Instructions S: Scheduled 'A-Equipment Failure (Explain) -l-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 Restruction 4-Continuation of Existing Outage (NPREG-1022)

E-Operator Training and License Examination. 5-Reduction F-Admini strative 9-Other 5

G-operational Error (Explain) Exhibit I-Same Source H-Other (Explain) w -- . . . _ _ . _ . - - ._ .