ML20079C126

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Monthly Operating Rept for May 1991 for Wolf Creek Generating Station
ML20079C126
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 05/31/1991
From: Rhodes F, Mike Williams
WOLF CREEK NUCLEAR OPERATING CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ET-91-0103, ET-91-103, NUDOCS 9106180438
Download: ML20079C126 (7)
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1 WOLF CREEK ' NUCLEAR OPERATING CORPORATION Forrest T. Rtuxks Vee President Engineering & Techneeal Services June 11, 1991 ET 91-0103  ;

U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station Pl-137 Vashington', D. C. 20555

Subject:

Docket No. 50-482: May, 1991 Monthly Operating Report Gentlemen Attached is the Hay, 1991 Monthly Operating Report for Wolf Creek Generating Station. This submittal is being made in accordance with the requirements of Technical Specification 6.9.1.8.

Very truly yours, 0

nxl,. [ c. . . imd'o Forrest T. Rhodes Vice President Engineering & Technical Services FTR/aem Attachment cca L. L. Gundrum (NRC), w/a A. T. !!owell (NRC) , w/a R. D. Martin (NRC). w/a D. V. Pickett ( N'.C ) , w/a i

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RO Box 411/ Burfingtort, KS 66839 / Phone. (316) 364 8931 FDR 9 1 v e, . ,1 :-.. .,4 c.. c.

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(-, D 0 C F . OSOO040; An Equal opportrwty Empoyer M F+CVET

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Atthct} ment to ET 91-0103 I

e NC[E CREEK 1RXLEAR OPERATIlG CORPORATION NOIE CREEK GENERATIlG STATIO4

}DmILY OPERATIIG REPORT MOtm!: May YEAR: 1991 Docket Ib. : 50-482 Facility Operating License Ib. : NPF-42 Report tb. 75 ,

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Prepanad by: 1 l

Merlin G. Williams '

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Att.achmdnt to ET 91-0103 SIM4ARY ,

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She following report highlights the operating experience of Wolf Cmok l Generating Station for the nonth of my,1991. This report is being provido:1 pursuant to Ubchnical Specification 6.9.1.8.

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SUMMARY

OF OPERATUG EXPERIDCE The unit operated continuously thwughout the nonth of May 1991. The plant began the nonth at 60% power in support of fuel conservation activities for full power operation this sunner. Power meined at or ncnr 60% for the mminder of the nonth, with the exception of one power decrease zugttimi by l Wolf Creek Ubcimical Specifications and two power increases to full power.

A lbtification of Unusual Event (!UE) ma declared and a plant shutdown ccmmnced May 12 at 2115 hours0.0245 days <br />0.588 hours <br />0.0035 weeks <br />8.047575e-4 months <br /> as a result of the failure of a 15V power supply in Engineerni Safety Features Actuation Systm cabinet SA036D.

However, the pcw.r supply was ruplaced and the ICE tenninated beforu a total plant shutdown was achieved, reactor power being reduced to a low of 50%

during the event, Pomr was increased fmn 60% to 100% May 13 at the request of Systm Operations to noot grid damnd. The unit rumined at 100% until late May 17 when a power reduction to 60% was commnood for fuel conservation. In addition, a power increase to 100% was again initiated May 30 at 0528 hours0.00611 days <br />0.147 hours <br />8.730159e-4 weeks <br />2.00904e-4 months <br /> at the request of Systan Operations, and powr meined at or near 100% for the muinder of the nonth.

II. MAJCR SAtTIY REIATED MAINfENA!CE ICTIVITIES

1. Replacment of instrunant and service air compressor CKA01A in support of Plant Modification Request 2495.
2. Ongoing replacmant of Ehlance of Plant (DOP) and 1Alclear Steam Supply Systm (NSSS) cmputers in support of P1 ant Modification Request 1479.

Wolf Creek Generating Station Monthly Operating Report May 1991 Page 1 of 5

Attachmeit to ET 91-0103 9

4 OPDtATIlG FATA REIUtT D000?P IG. 50-482 NorE CREIE GDERATIlG STATIQ1 WIP CREEK 1RCLFAR OPDIATIlO CORIORTIQ1 IATE 06-01-91 CD4PILTED BY M. WI1liams TELEPilCNE 316-364-8831 OPERATIIG Stim 1S

1. Reporting Period: Mw, 1991 Gross ! burs in Reporting Period 744_;
2. Currently Authorize:i Power Invel(MYt): 3411 Max. Depend. Capacity (Mhlbt) _)13h Design Electrical Rating (M6 Net): 1170
3. Power Invel to Nhich Restrictcd (If Any)(M6 Net): N/A
4. Reasons for restriction (If Any): N/A

'Ihis Month Yr. to Date Cumulative

5. Number of Iburs Reactor was Critical 744.0__ __Lj 23. 0 41,018.5
6. Reactor Reserve Shutdown 11ours 0. 0 ._ 0.0 339.8
7. Iburs Generator on Line 744.0 3,623.0 40,446.8
8. Unit Reserve Shutdown ! burs 0.0 0.0 0.0
9. Gross 'Ihernal Energy Generatoi (MG) 1.692,964 9.372,222 131,437,247
10. Gross Electrical Energy Generated (ME) 566,701 3,226;477 45,741,246
11. Net Electrical Energy Generated (MhM) 532,892 3,058,826 43,655,684
12. Reactor Service Factor 100.0 100.0 81.5
13. Reactor Availability Factor 100.0 100.0__ 82,2
14. Unit Service Factor 100.0 100.0 80.4 l 15. Unit Availability Factor 100.0 100.0 80.4 l 16. Unit Capacity Factor (Using MDC) 63.1 74.4 76.7 l
17. Unit Capacity Factor (Using Design Mie) 61.2 72.2 74.1
18. Unit Forced Outage Rate 0.0 0.0 3.7
19. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of each): Refueling Outage on Septanber 19, 1991 for 75 days.
20. If Shut Down at End of Report Period, Estinated Date of Startup: N/A l

l Wolf Creek Generating Station l Monthly Operating Report l May 1991

! Page 2 of 5

, At.+ a hme'nt to ET 91-0103 i

l A'IERAGE DAILY UNIT POiER LEVIL DOCKE71' !O. 50-482 NULF CREEK GENERATIfG STATIOi NOLF CREEK 1RELEAR OPDIATI!G CORPCRATIQ1 DATE 06-01-91 OCHPLImD BY M. Williams TELEPl[NE 316-364-883J.

lONIH Mw, 1991 DAY AVERAGE DAILY POfLil LEVEL DAY AVERAGE DAILY 104D1 LEVEL I (M9e-lbt) (lMe-Net) 1 632 17 1123 2 632 18 764 3 632 19 629 4 633 20 628 5 633 21 623 6 633 22 622 7 632 23 623 8 628 24 622 9 626 25 621 10 623 26 619 11 624 27 618 12 613 2. 616 13 761 29 614 14 1078 _. 30 774 15 1111 31 1093 16 1124 i

Wolf Cmek Generating Station Monthly Operating Report May 1991 Page 3 of 5

Attachment to ET 91-0103 .

UNIT SHUTDOWN AND POWER REDUCTIONS DOCRET NO. 50 482 .

VOLF CREEK GENERATING STATION VOLF CREEK NUCLEAR OPERATING CORPORATION DATE 06-01-91 COMPLETED BY M. Willia =s REPORT MONTH May. 1991 TELEPHONE 316-364-8831 TYPE METHODS SHUTTING F: FORCED DURATION REASON DOWN THE REACTOR CORRECTIVE ACTIONS / COMMENTS No Date S: SCHEDULED (BOURS) (1) OR REDUCING PCWER(2) 2 910517 S 0.0 F 5 Comenced power reduction at 2225 hours0.0258 days <br />0.618 hours <br />0.00368 weeks <br />8.466125e-4 months <br /> from 100Z to 60Z power for fuel conservation purpcses.

SIR 9tARY: The unit operated continuously throughout the month of May 1991. The only significant power reduction was comenced May 17, 1991 for fuel conservation purposes.

1) REASON: A: EQUIPMENT FAILURE (EXPLAIN) E: OPERATOR TRAINING AND LICENSE EXAMINATION (2) METHOD: 1. MANUAL [

B: MAINTENANCE OR TEST F: ADMINISTRATIVE 2. PANUAL SCRAM t C: REFUELING G: OPERATIONAL ERROR (EXPLAIN) 3. AUTOFATIC SCRAM l D: REGULATORY RESTRICTION H: OTHER (EXPLAIN) ~4 CONTINUED {

5. REDUCED LOAD  !
9. OTHER [

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Wolf Creek Generating Station l Monthly Operating Report i May 1991 Page 4 of 5 i

Att )

. .o )chient to ET 91-0103 1

1 NOLF CREEK NLCLEAR OPERATIIG 00RPORATION NOLP CREEK GENERATIIG STATIO1 UNIT 10.1 l

Inmi May, 1991

SUMMARY

OF OPERATIIG EXPERIDCE Idsted below in chronological sequence is a sunmuy of operating experiences for this month which zuquimi load reduction or msulted in significant non-load mlated incidents.

l IRTE TIME INFNP May 1, 1991 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> thit at 60% power.

ley 12, 1991 2115 hours0.0245 days <br />0.588 hours <br />0.0035 weeks <br />8.047575e-4 months <br /> tbtification of Unusual Event (NUE) declamd as a result of failum of 15V power supply in Engineerud Safety Features Actuation Systcri cabinet fiA036D.

Ccmnanced plant shutdcun.

2150 hours0.0249 days <br />0.597 hours <br />0.00355 weeks <br />8.18075e-4 months <br /> Power supply replaced / tested, discontinutd power decrmse, unit at 50% pomr.

2201 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.374805e-4 months <br /> Taminated NUE.

2209 hours0.0256 days <br />0.614 hours <br />0.00365 weeks <br />8.405245e-4 months <br /> Ccnmmeed power increase to 60% powr.

May 13, 1991 0122 hours0.00141 days <br />0.0339 hours <br />2.017196e-4 weeks <br />4.6421e-5 months <br /> thit at 60% power.

0758 hours0.00877 days <br />0.211 hours <br />0.00125 weeks <br />2.88419e-4 months <br /> Ccaumanced power increase to 100% per request of Systm Operations.

May 14, 1991 1313 hours0.0152 days <br />0.365 hours <br />0.00217 weeks <br />4.995965e-4 months <br /> thit at 100% power.

May 17, 1991 2225 hours0.0258 days <br />0.618 hours <br />0.00368 weeks <br />8.466125e-4 months <br /> Ccmnanced power decrease to 60% for fuel consttvation.

May 18, 1991 1448 hours0.0168 days <br />0.402 hours <br />0.00239 weeks <br />5.50964e-4 months <br /> Unit at 60% power.

May 30, 1991 0528 hours0.00611 days <br />0.147 hours <br />8.730159e-4 weeks <br />2.00904e-4 months <br /> Ccmnenced powe.r increase to 100% I nr request of Systra Operations.

May 31, 1991 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br /> Unit at 99% power.

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Wolf Crtok Generating Station Monthly Operating Report i

May 1991 Page 5 of 5

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