ML20076C564

Monthly Operating Repts for June 1991 for Sequoyah Nuclear Plant

ML20076C564
Person / Time
Site:	Sequoyah
Issue date:	06/30/1991
From:	Hollomon T, Wallace E TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9107220242
Download: ML20076C564 (10)

Text

-

o knnessee wey Aut*pdv.1101 Mrku S9 eel Creavega Tawnee 3?40?

July 15. 1991 i

U.S.

e. lear Regulatory Cornission ATTN: -Dccument Control Desk Washington, D C.

20555 Centlemen:

In the Matter of

)

Docket sos. 50-327 Tennessee Valley Authority

)

50-328 SEQUOYAll NUCLEAP. PLANT (SQN) - JUNE 1991 MONTilLY OPERATING REPORT Enclosed is the June 1991 Monthly Operating Report as required by SQN Technical Specification 6.9.1.10.

If you have any questions concerning this matter, please call M. A. Cooper at (615) 843-8422.

Very truly yours.

TENNESSEE VALLEY AUT110RITY l

?q.Q. &p--

fE.C.Wallace, Manager c

J Nuclear Licensing and Regulatory Affairs l

l-Enclosure cc: See page 2 l

l f-L 9107220242 910630 PDR ADOCK 05000327 N

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2 U.S. Nuclear Regulatory Conmission July 15, 1991 cc (Enclosura):

INPO Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30389 Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Conrission One White Flint, North 11555 Rociville Pike Rockville, Maryland 20852 Mr. Ted Marston, Director Electric Power Research Institute P.O. Box 10412 Palo Alto, Califoraia 94304 NRC Resident Insoector

=

Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379 Regional Administration U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region 11 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. B. A. Wilson, Project Chief U.S. Nuclear Regulatory Commission Region 11 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. F. Yost, Director I(esearch Services Utility Data Institute 1700 K Street, NW, Suite 400 Washington, D.C.

20006 1

IENNESSEEVAllEYAUIBORITY hT0lEARPOWERGROUP SEQU0YAHNUCLEARPI).NI l

MONIHlYOPERAIlNGREPORI I0THE hTCLEAR REGULATORY COEISSION J N 1991 UNII1 DOCKEI ElBER 50-327 LICENSENUMBERDPR-77 l

UNIT 2 DOCKET ElBER 50-328 l-LICENSEN913ERDPR-79

i OPERATIONAL

SUMMARY

JUNE 1991 UNIT 1

-Unit 1-generated 827,310 megawatthours (MWh) (gross) electrical power during June, with a capacity factor of 98.9 percent.

UNIT 2 Unit 2 generated 806,600 MWh (gross) electrical power during June with a capacity factor of 96.4 percent. On June 23, 1991, at'0824 Ea& tern daylight

~

-time (EDT), with Unit-2 operating at 100- percent power, Hotwell Pump 2B tripped due to an electrical short in the motor stator.

The motor stator had a weak insulation area in the ground-wall insulation portion of the coil L

resulting in the failure of-the coil. Manual turbine runback was initiated, and-Unit 2 power level was reduced to 88-percent. The Hotwell Pump 2B motor-stator coll = windings were replaced, and vibration tests were' perf ormed. At 0002-EDT on June L8, 1991, Unit-2 power increase was initiated.

Unit 2 was operating at 100 percent power at 0210 EDT on June 28, 1991.

POWER-0PERATED RELIEF VALVES (PORV) AND SAFETY VALVES

SUMMARY

There'were no challenges to PORVs or_ safety valves in June.

OFFSITE DOSE CALCULATION MANUAL (ODCM) CHANGES

-There were no changes to the ODCM during June.

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AVERAGE dally BIT POWER LEVEL DOCKET NO.

50-327 UNIT No.

One DATE:

07-08-91 COMPLETED BY:

T. J._Hollomon TELEPHONE: _(615) 843-7528 MONTH: JITNE 1991 AVERAGE DAILY POWER LEVEL DAY (MWe-Net)

AVERAGE DAILY POWER LEVEL DAY (MWe-Net)

I 1121 17 1114 2

1122 18 1116 3

1122 19 1115 4

1120 20 5

1116 1121 21 1090 6

1119 22 7

1050 1119 23 1068 3

1119 24 1076 ___ _

9 1121 25 1102 10 1119 26 1116 11 1120 27

___ 1118 12 1119 23 1116 13 1118 29 1119 14 1119 30 L117 15 1117 31 N/A 16 1107

-E

AVERAGEDAILYUNIIPOWERLEVEL 1

DOCKET NO.

50-328 UNIT No.

Two DATE:

_97 38-91 COMPLETED BY:

T. J. Ho11omon TELEPHONE:

(615) 843-7528 MONTH: JUNE 1991 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL l

DAY (MWe-Net)

DAY (MWe-Net) 1 1108 17 1100 2

1108 18 1100 3

1108 19 1098 4

1105-20 1093 5:

1103 21 1090 I

-6 1102 22 1090 7

1102 H23 1019 8

1100 24 980 9

-1100 25 986 l'0 1101-26 1001 l

11 1101

-27 1003 j

12-1101 28 1093-

'13-1101 29 1097 14 1101 30 1097 15-1101

-31 N/A i

16 1100-l

a-J OPERATING DATA REPORT DOCKET NO.

50-327 DATE Julv 8. 1991 COMPLETED BY T.-J. Hollomon TELEPHONE (615) 843-7528 OPERATING STATUS

.l Notes l

1. -Unit Name.. Seqggyah Unit One l

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2. ~ Reporting Period: June 1991 l_

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

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. 4 Nameplate Rating (Gross MWe): 1220.6 l

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

l 6.

Manimum Dependable Capacity (Gross MWe):,_L112. 0

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-- 7. Maximum Dependable Capacity (Net MWe): 1122:0 l

J

. 8.

If Changes Occur _in Capacity Ratings (Items Number 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

31. Hours in. Reporting Period -

720 4.343 87.648

12. Number of Hours Reactor Was Critical 720.0 4.212.3 44.284-13i Reactor Reserve' Shutdown Hours 0

0 0

=14. Hours Generator On-Line 720.0'-

4.193.3:

43.289.3

15. Unit Reserve. Shutdown Hours __

0. 0 -

0 0

16. Gross. Thennal: Energy Generated (MWH) _

2.435.763.4 14.180.520.6 141.466.588' 17., Gross Electrical Energy Generated (.MWH) 827.310 4.842.990-47.963.576

.18. Net Electrical Energy Generated (MWH) 799.550

_ 4.675.824' 45.972.700

.~19. Unit Service Factor 100.0-96.6 49.4

20. Unit Availability Factor 100.0 96. ft.

49.4

21. Unit Capacity Factor (Using MDC Net) 99.0 96.0-46.7 f 22.' Unit Capacity factor (Using DER Net).

96.7 93.8 45.7

23. Unit Forced Outage Rate 0.0

-- 3. 4 -

42.9' 24.- Shutdowns Scheduled Over Next 6 Months (Typei Date.'and Duration of Each);

Unit 1 Cvele' S refuelina outage is scheduled to becin October S.1991. with generator synchronization scheduled for November 29. 1991.

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'.25. If Shut Down At End Of Report Period. Estimated Date of Startup; N/A l

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i OPERATING DATA REPORT DOCKET NO.

_50-328 DATE _ July _B.

1991 COMPLETED BY L_,L_tial l omon L' 5L.04.1-152S__

TELEPH0hE d

OPERATING STATUS l Notes l

1 Unit Name:

Scauoyah Unit Two l

l 2.

Reporting Period: June 1991 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); _LllE Q l

l 6.

Maximum Dependable Capacity (Gross MWe):

1162.0, i

l 7.

Manimum Dependable Capacity (Net MWe): 1122.0 l

l 8.

If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report. Give Reasons:

9.

Power level To Which Restricted, If Any (Net MWe):

N/A

10. Reasons f or Restrictions, If Any:

N/A This Month Yr-to-Date Cumulative

11. Hours in Reporting Period 720 d.343___

79.LQ8

12. Number of Hours Reactor was Critical 720.0 4.343,j_

44.814

13. Reactor Reserve Shutdown Hours 0

0 0

14. Hours Generator On-Line 720.0___

4.306.0 43.866.4

15. Unit Reserve Shutdown Hours 0.0 0

0

16. Gross Thermal Energy Generated (MWH) 2.414.990.2 14.529.214.5 136.a03.665 17, Gross Electrical Energy Generated (MWH) 806.600 4.942.610

_ 46.430.826

18. Net Electrical Energy Generated (MWH) 777.392 4.768.619 44.111 h97

19. Unit Service factor 100.0 99.1 55.1__

20. Unit Availability factor 120.0 99.1 55.1

21. Unit Capacity f actor (Using MDC Net) 96.2 97.9 49.7

22. Unit Capacity factor (Using DER Net) 94.1 95,f_

48.6

23. Unit forced Outage Rate 0.0 0.9._

35,0__

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

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

N/A

00CKEI NO: _ _30-327 UNIT f4AME:

Gn g __.

UNIT SHulDO@ S AND POWEk REDUCTIONS DATE:___0/130/9i_,__

COMN EIED BY:Im.JJ19_1 uman 1

REPORT MONTti:_Je f 99I TE t[hiONE :iL!Ll_n4 }-75ZQ Cause and Correttsee Method of iitensee Action to Duration Shutting Do n Event Systgm Comppnent l

Z 3

Report No.

Code Code Prevent Recurrence No.

Date Type (Hours)

Reason Reactor feo shutdown or power reductions greater than 10 percent for a 24-hour period to report.

1 3

Enhibit G-Instruttions 2

Method:

I F ; f orced Reason:

for Pr?paration of Data 1-Manual S: Stheduled A-Equipment failure (E> plain) intry sheets fur licensee 2-Manual Scram B-Maintenance or Test Event Report (LER) file 3-Autueratic Scram C-Refueling 4-Continuation of Existing Outage (NUKEG-1022)

D-Requiatory Restruction E-Operator T raining and L icense Exaininetion 5-Reductiun 9-O t he r S.hi tii t 1-Some Source f-Administrative E

G-Operational Error (Enplain)

H-Other (E xplain)

..9 DOCRET NO:

50-328 l

UNIT NAME:

Two J ul41T SHUTDOWNS AND POWER REDUCTIONS :

DATE:2__DI/10/91

. REPORT f1DNTH: June. 1991.

. COMPLETED BY:1,_J. Hollomon TELEPH0taE :(615) 841-7328 Method of-Licensee Cause and Corrective Action to Shutting Down.

Event Systge.

Coopgnent Duration

-2 Code Prevent Recurren(e No.

Date Type (Hours)

-Reason Reactor Report'No.

Code 4

910623 f

A~

5.

SD -

MO On 6/23/91 at 0824 EDT Hotwell Pump.28 tripped due to an electrical short in the motor-stator. The motor stator had a wea nsulation area in the grour.d-wall' insulation portion of the coil resulting in:a failure of the coil. Manual turbine runback was initiated, and power was reduced to 88 percent. the Hotwell Pump 2B motor stator:

windings were replaced.- and vibration tests were performed.

At 0002 EDT on 6/28/91, Unit 2 j

power increase was initiated.

Unit 2 was again operating at 100 percent reactor power level at 0210 EDT on 6/28/91.

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d F: forced Reason:

.3 Method:

Enhibit G-Instructions I

5: Scheduled 1A-Equipment f ailure (Explain) Manual for Preparation of Data B-Maint enance 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 (NOREG-1022)

.E-Operator Training and License Enamination S-Reduction f-Admini st rati ve 9-Other

$ xhibit 1-Same Source E

G-Operational Error (Explain)

H-Other. (E = plain)

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