ST-HL-AE-2791, Monthly Operating Rept for Aug 1988 for South Texas Project Electric Generating Station Unit 1

Monthly Operating Rept for Aug 1988 for South Texas Project Electric Generating Station Unit 1

ML20154H519
Person / Time
Site:	South Texas
Issue date:	08/31/1988
From:	Forsyth M, Mcburnett M HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
ST-HL-AE-2791, NUDOCS 8809220035
Download: ML20154H519 (16)

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION UNIT 1 MONTHLY OPERATING F2EORT FOR AUGUST 25 - 31 HOUSTON LIGHTING AND PCUER C'. u NRC DOCKET NO. 50-498 LICENSE NO. NPF-76 1

Prepared by: MIrf 9 8 4

Lead Pe'rformanc4 Tec$1cian Date Reviewed by: s ,

_s T!82 Per ance Technician Supervisor Date

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Reviewed By / W P aiWErfgi sering nager 4 ffW V Dite u

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PiantSper1tendeht Date' Approved By: ll

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' 8809220035 880831 PDR ADOCK 05000498

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OPERATING DATA REPORT DOCKET NO. 50-498 UNIT 1 DATE Aucust 11. 1988 COHPLETED BY A.P. Kent TELEPH0tTE 512-972-7786 OPERATING STATUS

1. REPORTING PERIOD: 08/25-08/31 GROSS HOURS IN REPORTING PERIOD: 168

2. CURRENTLY AUTHORIZED POWER LEVEL (HWt): 3817 MAX. DEPEND. CAPACITY (HWe-Net): 1250.6 DESIGN ELECTRICAL RATING (HWe-Net):1250.6

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

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

5. NUMPER OF HOURS REACTOR WAS CRITICAL...... 96.0 96.0 96.0

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

7. HOURS GENERATOR ON LINE.................... 74.5 74.5 74.5

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

9. GROSS THERHAL ENERGY GENERATED (HVH)..... 200457.6 __

200457.6 200457.6 10.

GROSS ELECTRICAL ENERGY GENERATED (HWH).... 60720 60720 60720 11.

NET ELECTRICAL ENERGY GENERATED (HWH)..... 50420 50420 50420

12. REACTOR SERVICE FACTOR..................... 57% 57% 57%

13. '.EACTOR AVAILABILITY FACTOR............... 577 57% 57%

14 LNIT SERVICE FACT 0R....................... 44% 44% 44%

15. UNIT AVAILABILITY FACTOR.................. 44% 44% 44%

16. UNIT CAPACITY FACTOR (Using HDC)..........._24% 24%_ 24%

17. UNIT CAPACITY FACTOR (Using Design HWe)... 24% __24% 24%

18. UNIT FORCED OUTAGE RATE................... _$6% 56% 56%

19.

SHUTDOWNS SCHEDULED OVER NEXT 6 HCNTHS (TYPE, DATE, AND DURATION OF EACH):

Scheduled 14 day outage to begin September 23, 1988 and February 1, 1989 for Bottom Mounted Instrumentation Inspection.

20. IF SHUT DOWN AT END OF REPORT PERIOD, ESTIMATED DATE OT STARTUP 09/02/88 21.

UNITS IN TEST STATUS (PRIOR TO COMMERCIAL OPERATION): FORECAST ACHIEVED INITIAL CRITICALITY 03/08/38 03/08/88 INITIAL ELECTRICITY 03/30/88 03/30/88 COMMERCIAL OPERATION 08,/25/88 08/25/88 NL.NRC.R.APR.AT (C68)

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-498 ~

UNIT NAME 1 -

DATE An cm m t 1I_ 19h8 COMPLETED BY A.P. Kent TELEPHCIE 512-972-7786 .

REPORT MONTH August -

1 2 No. Date Type Duration Reason Methed of Licensee Cause & Corrective Systgm Compongnt (Hours) Shutting Event Code Code Action to 3

Down Reactor Report # Prevent Recurrence 88-01 880826 F 45.2 A 3 88-049 SB FUB Turbine / Reactor trip from 100% power.

Cause unknown at the time of the event.

88-02 880828 F 12.1 A 9 N/A SB FUB Turbine trip from 23%

power. Cause unknown at the time of the event. (Subsequent investigation determined that the trip was caused by a failed fuse block in the Stator Cooling Vater turbine trip circuitry. This was determined to be th cause of ever.t 88-01. )

I F: Forced Reascn: Method: IEEE 805-1983 S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram.

C-Refueling 3-Automatic Scram.

D-Regulatory Restriction 5 4-Cont. of Existing IEEE 803A-1983 E-Operator Training & License Examination Outage F-Administrative 5-Reduction G-Operational Error (Explain) 9-Other H-Other (Explain) l l

l UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-498 .

UNIT NAME 1 -

DATE August 11, 1988 COMPLETED BY A.P. Kent TELEPHONE 512-972-7786 "

REPORT '"" mi August 1 2 No. Date Type Laration season Method of Licensee Systgm Compongnt Cause & Corrective (Hours) Shutting 3

Event Code Coce Action to Down Reactor Report # Prevent Recurrence 88-03 880830 F 36.3 B 1 N/A SB PFF Steam leak. Cracked weld repair in Steam 1

Generator main steam 1 vent line. Various other welds were l

penetrant tested to ensure problem was not

! common to other areas.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-498 UNIT 1 DATE August 11, 1988 COMPLETED BY A.P. Kent TELEPHONE 512-972-7786 4 4 HON 7H August DAY AVERAGE DAILY POWER LIVIL DAY AVERAGE DAILY PolMR LEVEL (HWe-Nat) (MWe-Net) 1 N/A 17 N/A 2 N/A 10 _

N/A 3 N/A 19 N/A 4 N/A 20 N/A 5 N/A 21 N/A 6 N/A 22 N/A 7 N/A 23 N/A 8 N/A 24 N/A 9 N/A 25 1179 10 N/A 26 841 11 N/A 27 0 12 N/A 28 0 13 N/A 29 82 14 4

_N/A 30 160 15 N/A 31 0 i

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NL.NRC.R.APR.AT (C68)

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• Monthly Summary South Texas Project Unit i declared commercial operational status August 25 at 0001.

On August 26 a turbine / reactor trip occurred due to low stator water differential pressure. Subsequently a Safety Injection occurred due to low compensated steamline pressure. After the unit was placed on line on August 28, a turbine trip occurred delaying power ascension. By August 29 the unit was again on line.

Power ascension to 45% load commenced to allow troubleshooting tse the cause of the previous turbine trips. On August 30 the unit was reduced to 0% power to repair a steam leak in the main steam vent line.

PORVs and Safety Valves Summary No PORVs or Safety Valves were challenged during this reporting period.

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S3JTH TEXAS PROJECT l ELECTRIC GENERATING STATION I UNIT 1 MONTHLY OPERATING REPORT FOR AUGUST 1 - 24 HOUSTON LIGHTING AND POWER CO.

NRC DOCKET NO. 50-498 LICDISE NO. NPF-76 Prepared by: SS #f(Z 9 b Lead Phrformar/ce Tp6hnician 'Da t e Reviewed by: 9 /8/88 Performance Technician Supervisor Date Reviewed B TI

@ p seft n neering nager / Ifate Reviewed By: o 9 9 V[

Plant upe inte ndent Dath i A

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Approved By: _. .h M

'P1' ant Marlager Ddteh 1

'l OPERATING DATA REPORT DOCKET NO. 50-498 UNIf 1 DATE August 11. ]_988 COMPLETED BY A.P. Kent TELEPHONE 512-972-7786 OPERATING STATUS 1.

REPORTING PERIOD: 08/01-08/24 GROSS HOURS IN REPORTING PERIOD: 576

2. CURRENTLY AUTHORIZED POWER LEVEL (HWt): 3817 MAX. DEPEND. CAPACITY (HVe-Net): 1250.6 DESIGN ELECTRICAL RATING (HWe-Net):1250.6 3.

POWER LEVEL TO WHICH RESTRICTED (IF ANY)(HWe-Net): See Item 4

4. PPJETN3 FOR RESTRICTION (IF A!!Y): Unit in power ascension testing phase.

THIS MONTH YR TO DATE CUNULATIVE

5. NUMBER OF HOURS REACTOR VAS CRITICAL...... 460.7 2303.84 2303.84

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

7. HOURS GENERATOR ON LINE.................... 397.0 2030.18 2030.18

8. UNIT RESERVE SHUTDOWN HOURS................ 0 1

0 0

9. GROSS THERMAL ENERGY GENERATED (HVH). . . 1,238,131.2 3,966,352.6 3,966,352.6

10. GROSS ELECTRICAL ENERGY GENERATED (MVH) . . . . 406,360 1,204,902.8 1,204,902.8

11. NET ELECTRICAL ENERGY GENERATED (HVH)..... 370,011 998,930 998,930

12. REACTOR SERVICE FACTOR..................... N/A N/A N/A

13. REACTOR AVAILABILITY FACTOR................ N/A N/A N/A 14 UNIT SERVICE FACT 0R........................ N/A N/A N/A

15. UNIT AVAILABILITY FACTOR................... N/A N/A N/A

16. UNIT CAPACITY FACTOR (Using HDC)..........._N/A _N/A N/A

17. UNIT CAPACITY FACTOR (Using Dasign HWe).... N/A ..

N/A N/A

18. UNIT FO*"ED OUTAGE RATE.................... N/A N/A N/A

19. SHUTD(

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

Schede

,d 14 day outage to begin September 23, 1988 and February 1, 1989 for Bottom Mounted Instrumentation Inspection.

20. IF S.!U1 bCVH AT END OF REPORT PERIOD, ESTIMATED DATE OF STARIUP: N/A 21.

UNITS IN TEST STATUS (PRIOR TO COMMERCIAL OPERATION): FORECAST ACHIEVED INITIAL CRITICALITY 03/08/88 03/08/88 INITIAL ELECTRICITY 03/30/88 _03/30/88, COMMERCIAL OPERATION 08/25/88 08/25/88 NL.NRC.R.APR.AT (C68)

N UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-498 '

UNIT NAME 1 -

DATE Aucust i1. 1988 COMPLETED BY A.P. Kent

• TELEPHONE 512-972-7786 REPORT MONTH August l

No. Date Type Duration Reason Method of Licensee Systga Compongnt Cause & Corrective (Hours) Shutting 3

Event Code Code Action to l Down Reactor Report # Prevent Recurrence '

i 88-17 880728 5 2.8 B 4 N/A N/A N/A Performed React.or Trip Test at 100%

Power Plateau.

88-18 880807 F 0 D 5 N/A N/A N/A Reluced reactor power to comply with Tech.

Spec. action requirement for out of tolerance nuclear enthalpy rise hot channel factor.

88-19 880808 5 0 3 5 N/A N/A N/A Performed Large Load Reduction Test.

s UNIT SHUTDOWNS AND POW 1.R REDUCTIONS DOCKET NO. 50-.98

• UNIT NAME I DATE Anonc:t 11_ 1988 ,

COMPLETED BY A.P. Kent -

TELEPHONE 512-972-7786 REPORT MONTH August i

1 2 No. Date Type Duration Reason Method of Licensee Cause & Corrective Systga Compongnt (Hours) Shutting Event .Me Ne Acdon to 3

Down Reactor Report # Prevent Recurrence 1

88-20 880808 F 122.1 B 1 N/A N/A N/A Feed regulator valve steam leak repair.

88-21 880816 F 54.1 A 3 88-048 SB V Turbine / Reactor trip I due to Stator Cooling System transient experienced during pump switch over. A low flow condition was created by a faulty check valve.

I F: Forced Reason tiethod: IEEE 805-1983 St Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram.

C-Refueling 3-Automatic Scram.

D-Regulatory Restriction 5 4-Cont, of Existing IEEE 803A-1983 E-Opern9r Training & License Examination Outage F-Administrative 5-Reduction G-Operational Error (Explain) 9-Other H-Other (Explain)

AVERAGE DAILY UNIT POWER LIVIL DOCKET NO. 50-498 UNIT 1 DATE Aucunt 11. 1988 COMPLETED BY A.P. Kent TELEPHONE 512-972-7786 MONTH August l

DAY AVERAGE DAILY POWER LEVIL DAY l

AVERAGE DAILY POWEP LEVEL I (MWe-Net) (HWe-Net) 1 55 17 0 2 410 18 0 3 1139 19 591 4 1237 20 1184 5 1239 21 1219 6 1165 22 1214 7 983 23 1211 '

8 777 24 1208 9 0 25 N/A 10 0 26 N/A 11 0 27 N/A 12 0 28 N/A 13 0 29 N/A 14 507 30 ,

N/A 15 1079 31 N/A 16 522 NL.NRC.R.APR.AT (C68)

Monthly Summary Following successful completion of the Reactor Trip at 100%

Power Test ending the July report period, STP Unit 1 again reached the 100% power plateau August 2.

From August 8 through 13 the unit reduced power to 0% to repack several regulator valves in the feedwater system and complete other specific maintenance tasks. The ascension toward 100% power began August 14 at a rate of approximately 3% per hour.

On August 16 the unit tripped during a Stator Cooling System pump switchover as preparations were being made for preventive maintenance on one of the pumps. Following a check of the Estimated Critical Conditions calculations, power ascension resumed and 100%

power was achieved August 20 marking the start of the 100-Hour NSSS Acceptance Test. The acceptance test was successfully completed August 24 ending the Initial Startup testing program.

On August 25. STP Unit I was declared commercially operable.

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PORVs and Safety Valves Summary No PORVs or Safety Valves were challenged during this reporting period.

The Light company " " " . " " ' "I,{001.,,,g)22g9211

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llouston IJghting &: Power J , _

September 12. 1988 ST-HL-AE-2791 File No.: G02 10CFR50.71 U. S. Nuclear Regulatory Commission Attention: Document Control Desk washington, DC 20555 South Texas Project Electric Generating Station Unit 1 i Docket No. STN 50-498 Honthly Ope:*ating Reports for August 1988 Pursuant to 10CFR50.71(a) and the South Texas Project Electric Generating Station (STPEGS) Unit 1 Technical Specification 6.9.1.5, attached are the Monthly Operating Reports for August, 1988. Unit I was declared to be in commercial operation on August 25, 1988 at 0001 houra. As such, two reports are submitted for the month of August covering the conclusion of the startup phase (August 1 to 24) and the beginning of commercial operation (August 25 to 31). The data has teen "rezerced", as of the commercial operation initiation, in the later report.

If you should have any questions on this matter, please contact Mr. C.A. Ayala at (512) 972-8628.

. r Manager, Operations Support Licensing MAH/CAA/n1 Attachments: (1) STPEGS Unit 1 Monthly Operating Report - August 1-24, 1988 (2) STPEGS Unit 1 Monthly Operating Report - August 25-31, 1988 NL.NRC.R.AUG.LT A " U " """""" ""#"' ' I"

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e flouston 1.ighting & lher Comluny ST-HL-AE-2791 File No.: G02 Page 2 CCI Regional Administrator, Region IV Rufus S. Scott Nuclear Regulatory Commission Associated General Counsel 611 Ryan Plaza Drive, Suite 1000 Houston Lighting & Power Cempany Arlington, TX 76011 P. O. Box 1700 Houston, TX 77001 George Dick U. S. Nuclear Regulatory Commission INPO Washington, DC 20555 Records Center 1100 Circle 75 Parkway Jack E. Bess Atlanta, Ga. 30339-3064 Resident Inspector /Operationr c/o U. S. Nuclear Regul tory Commission Dr. Joseph M. Hendrie P. O. Box 910 50 Be11oort Lane Bay City, TX 77414 3ellport, NY 11713 J. I. Tapia Senior Resident Inspector / Construction c/o U. S. Nuclear Regulatory Commission P. O. Box 910 Bay City, TX 77414 J. R. Newman, Esquire Newman & Holtzinger, P.C.

1615 L Street, N.W.

Washington, DC 20036 t

R. L. Range /R. P. Verret Central Power & Light Company P. O. Box 2121 Corpus Christi, TX 78403 R. John Miner (2 copies)

Chief Operating Officer City of Austin Electric Utility 721 Barton Springs Rord Austin, TX 78704 R. J. Costello/M. T. Hardt City Public Service Board P. O. Box 1771 San Antonio, TX 78296 Revised 08/24/88 NL.DIST l

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