ST-HL-AE-4061, Monthly Operating Repts for Mar 1992 for South Texas Project Units 1 & 2

Monthly Operating Repts for Mar 1992 for South Texas Project Units 1 & 2

ML20091E016
Person / Time
Site:	South Texas
Issue date:	03/31/1992
From:	Jump W, Kent A HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ST-HL-AE-4061, NUDOCS 9204130283
Download: ML20091E016 (15)

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'The Light company llomton Lighting A: PowerfaupiJesu Project Untric Generating Station P,(f. Ilos 289 Wadsworth, Tesu 77483 April 10, 1992 ST-HL-AE-4061 File No.: G02 10CFR50.71 U. S. Nu;1 ear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 South Texas Project Units 1 & 2 Docket Nos. STN 50-498 & 50-499

, Monthly Operatina Renorts for March, 19Jl Pursuant to 10CFR50.71(a) arid South Texas Project Electric Generating Station (STPEGS) Technical Specification 6.9.1.5, attached are the Monthly Operating Reports for March, 1992.

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

'd Y b hvvL sw a Will3 m J. Jump O Manager Nuclear Licensing MKJ/lf Attachments: 1) STPEGS Unit 1 Monthly Operating Report -

March, 1992

2) STPEGS Unit 2 Monthly Operating Report -

March, 1992 9204130283 920331 PDR ADOCK 05000498 PDR gg.  !

R p1 M P192098002.1&2 A Subsidiary of Ilouston industries itNotporated j

4 Ilouston 1.ighting k I'owcr Compins Sautb Texas l'roject Ihtric Generat'ing Station IIL"A 4 Page 2 cc b

Ro9fcnal Administrator, Region IV Rufus S. Scott Nan'aar Requlatory Ccmmission Associato General Counsel 611 Ryan Pluza Drivo, Suite 400 llouston Lighting & Power Company Arlington, TX 76011 P. O. Box 61867 Georgo Dick, Project N r ger U.S. Nuclear Regulator -osamission INPO Washington, DC 20555 Records Conter '

1100 circio 75 Parkway _

J. I. Tapia Atlanta, GA 30339-3064

, Senior Resident Inspector c/o U.-S. Nuclear Regulatcty Dr. Joseph M. liondrio commission 50 Bo11 port Lano p P. O. Box 910 Bollport, NY 11713 Bay _ City,-TX 77414 l0 D. K. Lacker J.-R. Newhan, Esquire Bureau of Radihtion Control Hewman & Holtzinger,-P.C. Texas Department of Iloalth 1615 L Street, N.W. 1100 West 49th Stroot Washington, DC 20036 Austin, TX 78756-3189 D. E. Ward /T. M. Puckett contral Power and Light Company P. O. Box 2121 Corpus Christi, TX 78403 J. C. Lanier/M. B. Lee City of Austin _

Electric Utility Department P.O. box 1088 C Austin, TX 78767 K. J. Fiedler/M. T. Hardt City Public Servico Board

'P.

O.' Box 1771 San Antonio, TX' 78296 s

h Revised 10/11/91

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i SOUTl! TEXAS PROJECT ELECTFIC CENERATING STATION UNIT 1 MONTilLY OPERATING REPORT MARCil 1992 110USTON LIGilTING AND POWER CO.

NRC DOCKET NO. $0 498 LICENSE NO. NPF-76

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. . J STPEGS 'Jnit 1 began the reporting period at 1006 reactor power.

On 3/14/92 at 1109 a reactor trip occurred due to a momentary false reactor '

coolant flow trip signal. Maintenance was bt:ing performed to calibrate a th0P 2 Reactor Coolant Flow. Protection Set flow t ransmitter, 1%11owing calibration. .

when returning the transmitter to service, the high pressure side of the l transmitter was opened first instead of the low pressure side to pressurize the '

transmitter. This caused a momentary low (below setpoint) dif ferential pressure to be detected by two adjacent flow transmitters which initiated a reactor trip caused by a reactor coolant low flow indication.

The cause of the trip was attributed to failure to follow procedures. The l unit was returned to service on 3/17/92 at 2359 and concluded the reportirt ,

period at full power.  !

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OPERATING DATA REPORT DOCKET No. 50 498 UNIT 1 DATE Apr. 2._1992 COMPLETED BY LP rent TELEPil0NE 112/972 778f:

OPERATING STATUS

1. REPORTING PERIOD: 03/01-03/11 CROSS Il0URS IN REPORTING PERIOD: 744

2. CURRENTLY AUT110RIZED POWER LEVEL (MWt): 3800 MAX. DEPEND. CAPACITY (MWe-Net): 1250.6 DESIGN ELECTRICAL RATING (MWe Net): _.1250.6

3. POWER LEVEL TO WillC!! REST.11CTED (IF ANY)(MWe Net): None

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4. REASONS FOR RESTRICTION (IF ANY): N/A Tills MONTH YK TO DATE CUMUIATIVE

5. NUMBER OF 110URS REACTOR VAS CRITICAL. . 668.6 _l106.6 2212,LJ

6. REACTOR RESERVE bilDTDOWN 110URS. , . . ... 0 0 0

7. Il0URS CENERATOR ON LINE. . . . . . . . _.f:5.L.2 2009.2 21311,3

8. UNIT RESERVE SHUTDOWN 110URS. .. .. .... Q 0 0

9. CROSS THEPyAL ENERGY GENERATED (MWt) . . 241QE3,1 79603fn4 78114691

10. GROSS ELECTRICAL ENERGY GENERATED (MWil).. 834460 __ 271812D 2642617,.Q s

11. NET ELECTRICAL ENERGY GENERATED (MWil). . 7986.Q.1 _ 26061M 24934}25,

12. REACTOR SERVICE FACTOR ... . ..... ...... 8 4 ._?.1 96.5% 70.1%

13. REACTOR AVAILABILITY FACTOR. . . . .... .. 89J1 96di 70.1%

14. UNIT SERVICE FACTOR. . . ... .... .... , 8 R ,{d, 96.1% 67. 3

15. UNIT AVAllABILITY FACTOR. . . . . ... . ... 88.64 96.1% 67.5%

16. UNIT CAPACITY FACTOR (Using MDC). . 85.8% 95di 63 21

17. UNIT CAPACITY FACTOR (Using Design MWe). 85dll 95.41 63.2%

18. UNIT FORCED OUTAGE RATE., . . .... .. . 11di 3.91 13.41

13. SHUTDOWNS ScilEDULED OVER NFXT 6 MONTHS (TYPE, DATE, AND DURATION OF FACH):

Scheduled 8 day maintenance outage to begin April 6, 1992. Refueling and scheduled maintenance outage to begin September 19, 1992.

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

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- _ . . . . _ _ . . -_ l AVERAGE DAILY UNIT l'0VER LEVEL DOCKET NO. 50 498 UNIT 1 DATE 6DL_2ml?ll C0!!Pl.ETED BY C'ent_ _

TELEMIONE hl2/S]2 778J MONTil JAPCll DAY AVERAGE DAILY l'0VER LEVEL DAY AVERAGE DAILY l'OWER LEVEL (MWe-Net)

(MUc Net) 1258 17 .9_

1 18 652 2 _

1257 125R 19 I?15 3

4 1258 20 12J_7._

$ 1258 21 _

d 211__

1255 22 1219 _

6 23 1221 7 12D 1252 24 .1221 8

9 1254 25 122_1 _

26 _1219 10 12M .

27 1207 11 1255 28 1131 12 _

1258 13 1?56 29 1216 555 30 1219 14 _

15 0 31 1218 16 0

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There were tw I'ORY tir Saf etya v lves challenged during the reporting period, 1

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'-.C0?h. . k::,,.(lY l$._..___a SOUTli TEXAS PROJECT ELECTRIC GENERATING STATION UNIT 2 MONTilLY OPERATING REPORT MARCll 1992 1100STON LIGitTING AND POWER CO, NRC DOCKET NO, 50-499 LICENSE NO. NPF-80

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STPECS Unit 2 began the reporting period at 1006 reactor power. l On 3/9/92 Steam Generator Feedwater Pump Turbine 23 was tripped due to an ,

electro hydraulic control fluid leak on the line to the low pressere stop valve. l The fluid leak caused the stop valve to stick in the open position. A weld had cracked causing a leak to develop. The weld and a portion of the line was >

replaced. Two hydraulie actuators were replaced to allow tl.c stop valve to return to service. During the loss of the feedwater pump turbine, the Master controller was responding erratically. Reactor power was reduced to 49% to ,

minimize the possibility of a unit trip during troubleshooting. A spike was i detected on an auxiliary relay card in the 7300 cabinet. The card was replaced i and the unit was returned to full power on 3/12/9?. ,

On 3/30/92 Steam Generator Feedwater Pump Turbine ?? tripped on low oil

. pressure when a main oli pump tripped due to.a fault in the cabling. Reactor i power was reduced to 48% while investigating the cause of the pump trip. The I enble at the oil pump was repaired. The unit completed the reportin6 period with 'l the unft approaching full power.

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OPERATING DATA REPORT DOCKET NO, 50 499 l UNIT 2 DATE Apr 2. 1992 ,

COMPLETED !sY A.P. Rent  !

l TELEP110NE 512/972-7786

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i OPERATING STATUS

1. REPORTING PERIOD: 03/01 03/31 CROSS Il0URS IN REPORTING PERIOD: 744 ,

2. CURRENTLY AUTil0RIZED POWER LEVEL (MWt): 3800' i MAX.DEPENDtCAPACITY (MWe. Net): _1250.6- j DESIGN ELECTRICAL RATING (MWe Net): 1250.(t  ;

3.- POWER LEVEL TO WilICll RESTRICTED (IP ANY)(MWe. Net): None.

4. REASONS FOR RESTRICTION (IF ANY): N/A l 1

i THIS MONTil YR TO DATE CUMUIATIVE l \

5. ' NUMBER OF HOURS REACTOR WAE CRITICAL. . . . . 16LO 2035.6. 17450.2 l

6. REACTOR RESERVE ' SilUTDOWN 110URS . . . . . . . . . . . 0 0 0  ;

'7. Il0URS GENERATOR ON LINE............... .. 744.0 1998.3 _ 16480.5 ]

8. UNIT RESERVE SHUTDOWN 1100RS . . . . . . . . . . . . . . 0 0 0 l

9. CROSS TilERMAL EN5'RCY CENERATED (MVt).....F 63411 . 7366291 $9759562 l" 10. CROSS ELECTRICAL ENERGY GENERATED (MWil) . . 908680 2513490 20180850  ;

11. NET ELECTRICAL ENERGY CENERATED (MVil)..., 870309 _ 2407855 _19111858'

-12. REACTOR SERVICE FACT 0R.................. 100.0% 93.2.1 71.5%  !

13. REACTOR AVAIIABII.ITY l ACTOR. . . . . . . . . . . . . . l.Q0.,.J.1 93.2,1 Z.1,di .

14. ' UNIT SERVICE FACTOR.. .... ....... ..... 100.0% 91 11- 67.5%

15. UNIT AVAIIABI LITY FACTOR. . . . . . . . . . . . . . . .. _100. 0t 9L11 67.5%

16. UNIT CAPACITY FACTOR (Using MDC). ....... 93.5% 88.21 ' 62.6%

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17. UNIT CAPACITY FACTOR (Vain.g Des! En MWe) . . 93.5% _ 88.2% 62.6%- .,

1B. UNIT FORCED ("JTAGE RATE . . . . . . . . . . . . . . . . . _. ,,,_QJ.1 8,% 15.54-

19. SilUTDOWNS SCllEDULID OVER NEXT 6 MONTilS (TYPE DATE AND DURATION OF EACll):

. N/A

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

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AVERACE DAILY UNIT POWER LEVEL DOCEET No. 50 499 UNIT 2 DATE Apr 2. 1902 COMPLETED BY LP. Kept TELEPil0NE 112/972-7786 MONTil _116RCil DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MVe-Net) (MWo Net) 1 1251 17 1Z12 2 1214 18 1255 3 ,_,

1255 19 ,

1257 _

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1256 20 1255 _ , . ,

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1255 21 _ 1215 _

6 12 M__ 22 ,_

1256 ,

s 7 1255 23 . 1252 8 ,_1255 24 12}0 9 _

476 25 1250 10 54) 26 1255 11 545 27 1256 12 912 28 1253 13 _,

1252 29 ,_ l.256 14 1231 30 1252 15 1249 31 649 16 1249

UNIT SHUTDOWNS AND POWE2 REDUCTIO!sS DOCKET NO. 50-499 .

, UNIT 2 ,

DATE Apr. 2. 1992 COMPLETED BY A.P. Kent TELEPHONE 512/972-7786 REPORT MONTH MAPai

• 1 2 . 3 4 .

5 Type

'No. Date Duration Reason Method of Licensee System Component Cause & Corrective Action to (Hours) Shstting Event Code Code. Prevent . Recurrence Down Report #

Reactor.

92-03 920309 F 0.0 B -5 N/A JC P Steam Generator Feedwater Pump Turbine 23 was tripped due to an electro-hydraulic control fluid leak on the line to the low pressure stop valve. The fluid leak caused the stop valve to stick in the open position. A weld had cracked causing a leak to develop. The weld and a portion

.,of the line was replaced. Two hydraulic actuators were replaced to allow the stop valve to return to service. During the loss of the feedwater pump turbine, the Master Controller was respoMing erratically. The reactor wa.s reduced to 49% to minimize the possibility of a unit trip during troubleshooting. A spike was detected on an auxiliary relay card in the 7300 cabinet. The card was replaced.

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1 F: Forced 2

Reason:

3 Method:

4 IEEE 805-1983 5

IEEE 803A-1983 lj g=

h S: Scheduled A-Equipment Failure (Explain)

B-Maintenance or Test 14'.anual 2 Pfanual Scram (Ot $

j! gg C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Cont. of Existing { 'c3 r#

E-Operator Training & License Exam Outage L F-Administrative. 5-Reduction .

G-Operational Error (Explain) 9-Other.

H-Other (Explain) l 1

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-449 CIIT L DATE Arr. 2. 19?2 COMPLtit.D BY A.P. Vent TELEPHONE 512/972-77FA REPORT MONTH MARCH 2 3 4 5 1

Duration Reason Method of Licensee System Component Cause & Corrective Action to No. Date Type Prevent Recurrence Shutting Event Code Code (Hours)

Down Report

• Reactor SJ P Steam Generator Feedwater Pump Turbine 22 92-05 920330 F O.0 i B 5 N/A tripped on low oil pressure when a enin oil pump tripped due to a fault in the cabling. Reactor power was reduced to 48%

while investigating the cause of the pump trip. The cable at the oil pump was repaired.

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3 1 2 Method: IEEE 805-1983 IEEE 803A-1983 l N E 1, F: Forced Reason:

1-Manual ,, 4 r-S: Scheduled A-Equipoent Failure (Explain) lf" ['

B-Maintenance or Test 2-Manual Scram M 0>

3-Automatic Scram C-Refueling 4-Cont. of Existing  ; a [ -' j D-Regulatory Restriction i,' - N!

E-Operator Training 6 License Exaa Outage F-Administrative 5-Reduction O f I, C-Operational Error (Explain) 9-Other e

H-Other (Explain) f

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i PAGE -- ']-_. OF . '1 T9]LVA and Sa f e ty Valy,gg _ Suragry These vore no PORV on Safety Valves challenged during the report.InB period, i 1

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