ML20043F408

Monthly Operating Rept for May 1990 for Wolf Creek Generating Station

ML20043F408
Person / Time
Site:	Wolf Creek
Issue date:	05/31/1990
From:	Mike Williams WOLF CREEK NUCLEAR OPERATING CORP.
To:
Shared Package
ML20043F407	List: ML20043F405 ML20043F408 ML20043F409
References
NUDOCS 9006140491
Download: ML20043F408 (7)

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.. NOLF CREEK NUCLEAR OPERATDG CORP @ATIN 1

l NOLF CREEK GENERATDG STATION EtmILY OPERATDG REPORT r Ermin May YEAR: 1990  :

Docket No.: 50-482 1' Facility Operating License No.: NPF-42 i

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Pmpamd by:

L Merlin G. Williams 1

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SIM ERY

'1he following_ report highlights the operating experience of Wolf Creek Geerating Station for the nonth of May,1990. 'lhis report is being provided pursuant to Technical Wification 6.9.1.8. .

? I. SCH ERY OP OPERATING EXPERIENCE

'1he unit cmpleted its fourth refueling outage in May. '1he unit began the i month in Made 5, Cold Shutdown; entered Mode 4, Ibt Shutdown, on May.7 at 1706 hours0.0197 days <br />0.474 hours <br />0.00282 weeks <br />6.49133e-4 months <br />; entered Mode 3, Hot Standby, on May 9 at 1510 hours0.0175 days <br />0.419 hours <br />0.0025 weeks <br />5.74555e-4 months <br />; and entered k:

L Made 2,1 Startup, on May 13 at 1702 hours0.0197 days <br />0.473 hours <br />0.00281 weeks <br />6.47611e-4 months <br />. On May 14 at 0230 hours0.00266 days <br />0.0639 hours <br />3.80291e-4 weeks <br />8.7515e-5 months <br /> the reactor became critical and at 1222 hours0.0141 days <br />0.339 hours <br />0.00202 weeks <br />4.64971e-4 months <br /> entered Mode 1, Power Operation. .

l- h generator was synchronized to the grid for approximately three hours at' lt s .1746 hours0.0202 days <br />0.485 hours <br />0.00289 weeks <br />6.64353e-4 months <br /> on May 14 in preparation for a turbine overspeed trip test.

Following the test a reactor trip occurred at 2137 hours0.0247 days <br />0.594 hours <br />0.00353 weeks <br />8.131285e-4 months <br /> due to low level in Steam Generator "C" caused by lower than nomal feedwater tannaratures, h unit as restarted frcan Mode 3 and synchronized to the grid at 0017 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br /> on

,' May 16. '1his marked the end of the refueling outage which lasted 67 days,  ;

l 23 hours2.662037e-4 days <br />0.00639 hours <br />3.80291e-5 weeks <br />8.7515e-6 months <br />, and 50 minutes, j _On May 17 at 1725 hours0.02 days <br />0.479 hours <br />0.00285 weeks <br />6.563625e-4 months <br /> with the unit at 92% power, a leak was discovered on

., the seal water return line for Main Feedwater Purnp "A". A power reduction I was initiated and the unit entered Mode 2 at 2152 hours0.0249 days <br />0.598 hours <br />0.00356 weeks <br />8.18836e-4 months <br />. At 2305 hours0.0267 days <br />0.64 hours <br />0.00381 weeks <br />8.770525e-4 months <br /> a reactor trip occurred due to low level in Steam Generator "C" caused by its aLu g m.ic relief valve failing open. h leaking seal water return line and aba peric relief valve were repaired and the unit was restarted and synchronized to the grid at 1920 hours0.0222 days <br />0.533 hours <br />0.00317 weeks <br />7.3056e-4 months <br /> on May 18.

On May 19 at 2353 hours0.0272 days <br />0.654 hours <br />0.00389 weeks <br />8.953165e-4 months <br />, with the unit at 98% power, a high level in Moisture Separator Drain Tank "A" caused a turbine trip which then caused a reactor trip. h high drain tank level was caused by a failed check valve on a line that controls tank level, h valve was repaired and the unit was restarted and synchronized to the grid at 0025 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> on May 21. '1he unit-reached 100% power at 1830 hours0.0212 days <br />0.508 hours <br />0.00303 weeks <br />6.96315e-4 months <br /> on May 22 and renained at or near 100%

power for the remainder of the nonth.

II. MAKR SAFEI"I REIATED MAINTENANCE ACTIVITIES

1. "A" Train Essential Service Water flow halance.

2. Containment hydrogen analyzer nodification to improve reliability.

3. Main Steam Isolation Valve testing.

Wolf Creek Generating Station Monthly Operating Report May 1990 Page 1 of 6

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OPERATDG DMA REPGtP DOCKET NO. 5G 482 NOLF CREEK GENERATDG S'IATIO4 NOLF CREEK NUCLEAR OPERATING CXRPCR,L'I'ITE DATE 06-01-EQ,, 1 CCMPIRFED BY M. Willime3 TELEP10NE 316-364-9Qt.

TERATDG STAMS i

1. Reporting Period: May, 1990 Gross Hours in Reporting Periods ,_734_

2. Currently Authorized Power Isvel(MNt):_.}{ n Max. Depend.-Capacity (M4e-Net):_.113.5 l l

Design Electrical Rating (MNe-Net): 1170 l

3. Power level to Which Restricted (If Any)(MNe-Net): N/A 4.- Reasons for restriction (If Any): N/A

'1his Month Yr. to Date Cunulative ,

5. Numoer of Hours Reactor was Critical 381.8 1959.1 32,258.5

6. Reactor Reserve Shutdown Hours 0.0 0.0 339.8 t

7. Hours Generator on Line ,

345.0 1899.7 31,686.8

8. Unit Reserve Shutdown H3urs 0.0 0.0 0.0

9. Gross '1hemal Energy Generated (MHH) 1,003,923 G,156,031 104,633,286 ,

10. Gross Electrical Energy Generated (MHH) 345,546 2.141,786 36,420,733

11. Het Ele.,trical Energy Generated (MWH) 316,614 2,027,810 34,750,181 l

12. Reactor Service Factor 51.3 54.1 77.6

13. Reactor Availability Factor 51.3 54.1 31

14. Unit Service Factor 46.4 52.4 76.2 l

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15. Unit Avai1ahi1ity Factor 46.4 52.4 76.2

16. Unit Capacity Factor (Using MDC) 37.5 49.3 74.0

(_ 17. Unit Capacity Factor (Using Design NWe) 36.4 47.8 71. 5 __

18. Unit Forced Outage Rate 16.5 6.0 4.7 l

19. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of each): N/A 1 1

20. If Chut Down at End of Report Period, Estimated Date of Startup: N/A 1

l Wolf Creek Generating Station Monthly Operating Report May 1990 l

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Y AVERAGE DAILY WIT PONER IEv'EL DOCKET NO. 50-482 .j 1 NOLF JUEK GDERATDG SMPIN- '

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N11F CREEK NUCLEAR OPERATDG O@PORATIN DATE 06-01-90

,, O N PLETED'BY M. Wi11i=== j i

TELEPtKME 316-364-8831- -l hl6lOmi c 1 May, 1990  !

i IRY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL i (M4e-Net)- (MNe-Net) i l

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• 0 17 704  !

!;!i 21 0 18 -8

' 3~ 0 19 705 l 4~ 0 20 0 .

5 0 21 481

- 6' m O 22 1071 U ;7 0 23 1146 n, 8 0 24 1147 9 0 25 1146 10 0 26 1146 ill 0 27 1147

'12 0 28. 1148 13' O 29 1147 s 14 0 30 1147 15 0 31 1146 16> 388 ni

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Wolf Creek Generating Station Monthly Operating Report

,4 May 1990 Page 3 of 6

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UNIT SHUTDOWN AND POWER REDUCTIONS .

DOCRET NO. 50-482 WOLF CREEK GENERATING STATION WOLF rmrmit NUCLEAR OPERATING CORPORATION

. DATE 06- 0.".- 90 COMPLETED BT M. Wi. liana May. 1990 TELEPHONE 316-3M-8831 REPORT MONTH TYPE METHODS SHUTTING F: FORCED DURATION REASON DCWN THE REACTOR CORRECTIVE ACTIONS /C009ENTS No Date S: SCHEDULED (HOURS) (1) OR REDUCING POWER (2) 4 900501 S 329.8 C 4 Continued scheduled refueling outage.

5 900514 F 22.4 G 3 Reactor trip due to steam generator low level caused by low feedwater temperature. (Licensee Event Report 90-011-00 due June 13. 1990.)

0.7 B 1 Performance of Main Turbine Overspeed Test.

6 900515 S 7 900517 F 21.6 A 1/3 Manual shutdown from 92Z due to feedwater pump seal line leak: reactor trip from OZ due to steam generator low level. (Licensee Event Report 90-012-00, due June 16. 1990.)

8 900519 F 24.5 A 3 Reactor trip due to high water level in Moisture Separator Drain Tank. (Licensee Event Report 90-013-00 due June 18. 1990.)

SMSWhRY: The unit completed its fourth refueling outage on May 16, 1990. Three reactor trips occurred: one near the end of the uutage due to operational error and two shortly afterwards due to minor equipment problems. Following these events the unit operated at or near 100Z for the remainder of the month.

1. MANUAL

1) REASON: A: EQUIPMENT FAILURE (EKPLAIN) E: OPERATOR TRAINING AND LICENSE EKAMINATION (2) METHOD: 2. MANUAL SCRAM B: MAINTENANCE OR TEST F: ADMINISTRATIVE G: OPERATIONAL ERROR (EXPLAIN) 3. AUTOMATIC SCRAM C: REFUELING 4. CONTINUED D: REGULATORT RESTRICTION B: OTHER (EXPLAIN) 5. REDUCED IAAD

9. OTHER Wolf Creek Generating Station Monthly Operating Report May 1990 Page 4 of 6

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W2E CREEK NUCLEAR CPERATDG C%PCRATICH W37 CREEK GENERATDC SThTICH LMIT IG.1 30 01 Mav, 1990 SGMARY OF OPERATDG IXPERIDGE Listed belw in chronological sequence is a sumary of operating experiences for this acnth which required load reduction or resulted in significant non-load related incidents.

D!E M .EVDC May 1, 1990 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> tlnit in Mode 5 - Cold Shutdown. Continuing Refueling Outage activities.

May 7, 1990 1706 hours0.0197 days <br />0.474 hours <br />0.00282 weeks <br />6.49133e-4 months <br /> Entered Mode 4 - Hot Shutdown.

May 9, 1990 1510 hours0.0175 days <br />0.419 hours <br />0.0025 weeks <br />5.74555e-4 months <br /> Enterui Mode 3 - }bt Standby.  !

May 13, 1990 1702 hours0.0197 days <br />0.473 hours <br />0.00281 weeks <br />6.47611e-4 months <br /> Entered Mode 2 - Startup.

May 14, 1990 0230 hours0.00266 days <br />0.0639 hours <br />3.80291e-4 weeks <br />8.7515e-5 months <br /> Reactor critical.

1222 hours0.0141 days <br />0.339 hours <br />0.00202 weeks <br />4.64971e-4 months <br /> Entered Mode 1 - Power Operation.

2137 hours0.0247 days <br />0.594 hours <br />0.00353 weeks <br />8.131285e-4 months <br /> Reactor trip - low level Steam Generator "C".

May 15, 1990 1302 hours0.0151 days <br />0.362 hours <br />0.00215 weeks <br />4.95411e-4 months <br /> Entered Mode 2 - Startup.

1419 hours0.0164 days <br />0.394 hours <br />0.00235 weeks <br />5.399295e-4 months <br /> Reactor critical.

1422 hours0.0165 days <br />0.395 hours <br />0.00235 weeks <br />5.41071e-4 months <br /> Entered Mode 1 - Power Open tion.

May 16, 1990 0017 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br /> Generator synchronized to the grid. Refueling outage emplete.

May 17, 1990 1725 hours0.02 days <br />0.479 hours <br />0.00285 weeks <br />6.563625e-4 months <br /> Began decreasing power from 92% due to a leak on the seal water return line for Main Feedwater Punp "A".

2152 hours0.0249 days <br />0.598 hours <br />0.00356 weeks <br />8.18836e-4 months <br /> Entered )bde 2 - Startup.

2305 hours0.0267 days <br />0.64 hours <br />0.00381 weeks <br />8.770525e-4 months <br /> Reactor trip - low level Steam Generator "C".

May 18, 1990 1155 hours0.0134 days <br />0.321 hours <br />0.00191 weeks <br />4.394775e-4 months <br /> Entered Mode 2 - Startup.

1235 hours0.0143 days <br />0.343 hours <br />0.00204 weeks <br />4.699175e-4 months <br /> Reactor critical.

1727 hours0.02 days <br />0.48 hours <br />0.00286 weeks <br />6.571235e-4 months <br /> Entered Mode 1 - Power Operation.

1920 hours0.0222 days <br />0.533 hours <br />0.00317 weeks <br />7.3056e-4 months <br /> Generator synchronized to the grid.

Wolf Creek Generating Station Manthly Operating Report May 1990 Page 5 of 6

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May 19, 1990 2353 hcurs Reactor trip - high water level in Moisture Separator Drain Tank *A". l May 20, 1990' 1702 hours0.0197 days <br />0.473 hours <br />0.00281 weeks <br />6.47611e-4 months <br /> Entered Mode 2 - Startup.

1724 hcurs Reactor critical.

1911 hcurs attered Mode 1 - Power Operation.

May 21, 1990 0025 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> Generator synchrmised to the grid.

May 22, 1990 1830 hours0.0212 days <br />0.508 hours <br />0.00303 weeks <br />6.96315e-4 months <br /> thit at 100% power. ,

May 31, 1990 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br /> Continuing operation at 100% pcuar.

Wolf Creek Generating Station hthly Operating Report May 1990 Page 6 of 6

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