ST-HL-AE-5277, Monthly Operating Repts for Dec 1995 for South Texas Project

Monthly Operating Repts for Dec 1995 for South Texas Project

ML20096E904
Person / Time
Site:	South Texas
Issue date:	12/31/1995
From:	Hill R, Mallen F HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ST-HL-AE-5277, NUDOCS 9601230073
Download: ML20096E904 (14)

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The Light c o mp a nyS uth Texas Project Electric Generating P. O.Station Box 289 Wadsworth, Texas 77483 Houston Lighting & Power January 15, 1996 ST-HL-AE-5277 File No.: G02 10CFR50.71 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Monthly Operatine Reports for DecemLr 1995 Pursuant to 10CFR50.71(a) and South Texas Project (STP) Technical Specification 6.9.1.5, attached are the Monthly Operating Reports for December 1995.

If you should have any questions on this matter, please contact Ms. D. M. Bergendahl at (512) 972-7688.

/MM _-

F. H. Mallen Manager, Planning & Controls RLH/lf Attachments: 1) STPEGS Unit 1 Monthly Operating Report - December 1995

2) STPEGS Unit 2 Monthly Operating Report - December 1995 9601230073 951231 i PDR ADOCK 05000498  :

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1 SOUTH TEXA5 PROJECT ELECTRIC GENERATIBIG STATIOtt UttIT 1 3000fTMLY OPERATISUG REPORT DECERGEER 1995 MOUSTott LIGNTISOG ABID POWER CO.

SERC DOCKET 300. 50-498 LICEBESE 35 0 . BfPF-7 6 Reviewed By: -' A h8 6.MQEdGhND'HL' A Dgte i Approved M dM / ~ //~ 94r

i. W. MYERS C Q Date m _ _ _ _.

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RAcakthly summarv ,

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STPEGS Unit .1 began the reporting period operating at 100% reactor power.  !

On December 18, 1995 at 0335 a reactor trip occurred due to a turbine trip -

above 50% reactor power. The cause of the trip was a pilot wire monitoring relay ,

actuation causing Main Generator Lockout. '

r The root cause of the trip was determined, corrective maintenance performed f and the unit returned to service on December 21 at 1843. The unit achieved full power on December 23 and operated for the remainder of the reporting period with ,

no unit shutdowns or significant power reductions.  ;

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OPERATIasG DATA REPORT DOCKET NO. 50-498 UNIT 1 DATE Jan. B. 1996 COMPLETED BY R.L. H111 TELEPHONE 512/972-7667 OPERATIses STATUS

1. REPORTING PERIOD: 12/01/95-12/31/95 GROSS HOURS IN REPORTING PERIOD: 744 '

2. CURRENTLY AUTHORIZED POWER LEVEL (MWt): 3800 MAX. DEPEND. CAPACITY (MWe-Net): 1250.6 DESIGN ELECTRICAL RATING (MWe-Net): 1250.6

3. POWER LEVEL TO WHICH RESTRICTED (IF ANY) (MWe-Net) : None

4. REASONS FOR RESTRICTION (IF ANY): N/A THIS MONTH YR TO DATE CUMULATIVE

5. NUMBER OF HOURS REACTOR WAS CRITICAL..... 669.7 7684.3 41637.2

6. REACTOR RESERVE SHUTDOWN HOURS........... 0 0 0 ,

7. HOURS GENERATOR ON LINE.................. 656.9 7572.0 40339.3

8. UNIT RESERVE SHUTDOWN HOURS.............. 0 0 0

9. GROSS THERMAL ENERGY GENERATED (MWt).... 2405809 28334354 148156335

10. GROSS ELECTRICAL ENERGY GENERATED (MWH).. 825800 9726710 50381670  ;

11. NET ELECTRICAL ENERGY GENERATED (MWH).... 789780 9301768 47812720

12. REACTOR SERVICE FACTOR................... 90.0% 87.7% 64.6%

13. REACTOR AVAILABILITY FACTOR.............. 90.0% 87.7% 64.6%

14. UNIT SERVICE FACTOR...................... 88.3% 86.4% 62.6% ..

15. UNIT AVAILABILITY FACTOR................. 88.3% 86.4% 62.6%

16. UNIT CAPACITY FACTOR (Using MDC)........ 84.9% 84.9% 59.3%

17. UNIT CAPACITY FACTOR (Using Design MWe).. 84.9% 84.9% 59.3%

18. UNIT FORCED OUTAGE RATE.................. 11'. 7 % 2.4% 26.3% I

19. SHUTDOWNS SCHEDULED OVER NEXT 6 MONTHS (TYPE, DATE AND DURATION OF EACH) :

Scheduled 35 day refueling outage to begin on May 18, 1996. .

20. IF SHUT DOWN AT END OF REPORT PERIOD, ESTIMATED DATE OF STARTUP: N/A

)

J AVERMaB DhZLY U3 TIT POTTER LEVEL DOCKET NO. 50-490 I UNIT 1 l DATE Jan. 8, 1996 COMPLETED BY R.L. 11111 TELEPHONE 512/972-7667 MONTH DECEMBER DhY AVERMBE DAILY POttBR LEVEL DhY AVERMBE DAILY Potter LEVEL (MWe-Net) (MWe-Net)

I 1 1260 17 1262 j 2 1263 18 174 3 1263 *9

. 0 1

4 1254 20 0  ;

5 1256 21 0 1 6 1254 22 163 7 1263 23 1025 8 1258 24 1262 j 9 1263 25 __ 1267 10 1263 26 1266 11 1263 27 1267 12 1257 28 1267 13 1262 __ 29 1266 14 1262 30 1263 15 1263 31 1266 16 1259

UstIT SHUTDO4WES AND POWER REDUCTIONS .

DOCKET NO. 50-498 UNIT 1 .

DATE Jan. 8. 1996 -

COMPLETED BY R.L. Fill TELEPHONE 512/972-7667

• REPORT MONTH DECEMBER 1 2 3 4 5 No. Date Type Duration Reason Method of Licensee System Component Cause & Corrective Action.to (Hours) Shutting Event Ne Code Prevent Recurrence Down Report #

Reactor f 93-09 951218 F 87.1 H 3 1-95-013 EA RLY-85 A reactor trip occurred due to a turbine trip above 50% reactor power. The cause of the trip was a pilot wire monitoring relay actuation causing Main Generator Lockout. The Main Generator Lockout resulted in an automatic turbine trip and automatic reactor trip. '

The cause of.the pilot wire monitoring relay actuation was due to an "A phase" ground on a Main Transformer protection relay. This ground combined with a fault to a 345 KV transmission line caused by lightning resulted in an actuation of the pilot wire monitoring relay.

i The corrective actions to prevent recurrence will be discussed in the LER.

1 2 3 4 5 F: Forced Reason: Method: IEEE 805-1983 IEEE 803A-1983 l

S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Cont. of Existing E-Operator Training & License Exam Outage F-Administrative 5-Reduction G-Operational Error (Explain) 9-Other H-Other (Explain)

__m__ _ _ _ . _ . _ _ _ . _ _ _ _ _ _ . _ _ . - . _ . _ _ _ _ _ _ . _ . - _ _ _ . _ _ _ _ _ _ _ _ _ _ _ . -_ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , - * . _ . -m

• _ , _ . _ _ _ _ _ . _ . _ _ _ _ _ . __ _ _ _ _ _ _ _ _ _-m__ -_ _ ___-

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Pomvm and safety valves summmary Following the Unit 1 reactor trip on December 18 at 0335, at approximately 0350, the Pressurizer Power Operated Relief Valves cycled open and closed three times. Auxiliary spray flow was used to regain control of pressurizer pressure.

The electrical buses supplying power ' to the Reactor Coolant Pumps were ,

reenergized at approximately 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br />. At approximately 0511. hours, Reactor Coolant Pump 1A was started followed by starting Reactor Coolant Pump 1D approximately eleven minutes later. The reestablished forced Reactor Coolant-System flow restored normal pressurizer spray. capability. j i

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e SOUTE TEXAS PROJECT ELECTRIC GENERATIBOG STATIOtt UNIT 2 3000ETMLY OPERATI3IG REPORT s DECEsdERR 1995 MOUSTOtt LIGatTISOG ABID POWER CO.

asRC DOCKET 350. 50-499 LICE 38SE 300. NPF-SO r

Reviewed By: Ol@) k_

" NM~ 'ENbAHL Dale '

' Approved By: 4 h f fd R. d. MASSE Date

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1 Menthly sumum;r STPEGS Unit 2 operated during the reporting period with no unit shutdowns or significant power reductions.

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OPERATING DATA REPORT DOCKET NO. 50-499 UNIT 2 )

DATE Jan. 8. 1995 l COMPLETED BY R.L. Hill TELEPHONE 512/972-7667 OPERATING STATUS

1. REPORTING PERIOD: 12/01/95-12/31/95 GROSS HOURS IN REPORTING PERIOD: 744

1. CURRENTLY AUTHORIZED POWER LEVEL (MWt): 3800 MAX. DEPEND. CAPACITY (MWe-Net) : 1250.6 DESIGN ELECTRICAL RATING (MWe-Net): 1250.6

3. POWER LEVEL TO WHICH RESTRICTED (IF ANY) (MWe-Net) : None

4. REASONS FOR RESTRICTION (IF ANY) : N/A THIS MONTH YR TO DATE CUMULATIVE

5. NUMBER OF HOURS REACTOR WAS CRITICAL..... 744.O _ 8064.0 38100.7

6. REACTOR RESERVE SHUTDOWN HOURS........... 0 0 0

7. HOURS GENERATOR ON LINE.................. 744.0 7985.8 36818J B. UNIT RESERVE SHUTDOWN HOURS.............. 0 0 0

9. GROSS THERMAL ENERGY GENERATED (MWt).... 2805403 30194180 134974677

10. GROSS ELECTFICAL ENERGY GENERATED (MWH).. 966700 10370511 45828381

11. NET ELECTRICAL ENERGY GENERATED (MWH).... 926620 9923091 43649346

12. REACTOR SERVICE FACTOR................... 100.0% 92.1% 66.5%

13. REACTOR AVAILABILETY FACTOR.............. 100.0% 92.1% 66.5%

14. UNIT SERVICE FACTOR...................... 100.0% 91.2% 64.3%

15. UNIT AVAILABILITY FACTOR................. 100.0% 91.2% 64.3%

16. UNIT CAPACITY FACTOR (Using MDC)......... 99.6% 90.6% 60.9%

17. UNIT CAPACITY FACTOR (Using Design MWe).. 99.6% 90.6% 60.9%

18. UNIT FORCED OUTAGE RATE.................. 0.0% 1.7% 25.9%

19. SHUTDOWNS SCHEDULED OVER NEXT 6 MONTHS (TYPE, DATE AND DURATION OF EACH) :

N/A

20. IF SHUT DOWN AT END OF REPORT PERIOD, ESTIMATED DATE OF STARTUP: N/A

AVERAGE DAILY UNIT POWER LEVEL 3 DOCKET NO. 50-499 UNIT 2 DATE Jan . 8, 1995 COMPLETED BY R.L. Hill TELEPHONE 512/972-7667 MONTH DECEMBER DhY AVERAGE DAILY POWER LEVEL DhY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 1263 17 1263 2 1263 18 1238 3 1259 19 1233 4 1262 20 1228 5 1263 21 1216 6 1258 22 1199 7 1258 23 1200 8 1263 24 1200 9 1258 25 1198 10 1264 26 1200 11 1259 27 1209 12 1264 2B 1263 13 1258 29 1263 14 1263 30 1259 15 1263 31 1264 16 1259

e .* l UstIT suuTDosess Asso yourant REDUCTroues ,

DOCKET NO. 50-499 UNIT 2 DATE Jan. R. 1995 .

I COMPLETED BY R.L. Hill ]

TELEPHONE 512/972-7667 i REPORT MONTH DECEMBER

• j 1 2 3 4 5 No. Date Type Duration Reason Method of Licensee System Couponent cause & Corrective Action to (Hours) Shutting Event Code Code Prevent Recurrence Down Report #

Reactor l

THERE WERE NO UNIT SHUTDOWNS OR SIGNIFICANT POWER REDUCTIONS DURING THE REPORTING PERIOD 1 2 3 4 5 F: Forced Reason: Method: IEEE 805-1983 IEEE 803A-1983 S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Cont. of Existing E-Operator Training & License Exam Outage F-Administrative 5-Reduction G-Operational Error (Explain) 9-Other H-Other (Explain)

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PORVs and Safety Valves . Susan 4DC There were no PORV or Safety Valves challenged during the reporting period.

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