ML20059F923

Monthly Operating Rept for Dec 1993 for Cooper Nuclear Station

ML20059F923
Person / Time
Site:	Cooper
Issue date:	12/31/1993
From:	Gardner R, Wheeler S NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CNSS948503, NUDOCS 9401140234
Download: ML20059F923 (5)

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r COOPER NUCLEAR STATON -

.. P.o. DOX 98. BROWNVILLE, NEBRASKA $&321 -

. Nebraska Public Power District n-...

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. CNSS948503 -

j January'7, 1994 i I

Document Control Desk' U. S. Nuclear Regulatory Commission

- Washington, D.C. 20555

' Subj ect: Monthly Operating Status Report for December,-Docket No._50-298.

Gentlemen:

Enclosed for your information and use is the Cooper Nuclear.. Station Monthly;  ;

Operating Status Report for December 1993. .The report includes Operating Status, Average. Daily Unit Power Level, Unit Shutdown Data and-a Narrative Summary of Operating Experience.  !

Should you have any comments, or require additional information regarding this report, please contact me, Sincerely, R. L. Cardner Plant Manager RLG/SCW/ dis Enclosures cc: G.~D. Watson J. L. Milhoan 150006 t

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OPERATING DATA REPORT

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DOCKET NO. 050-0298 i UNIT CNS DATE January 7. 1994 OPERATING STATUS TELEPHONE (402) 825-5487 ,

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1. Unit Name: CooDer Nuclear Station Notes

2. Reporting Period: December 1993 l i

3. Ucensed Thermal Power (MWt): 2381

4. Nameplate Rating (Gross MWe): 836

5. Design Electrical Rating (Net MWe): 778

6. Maximum Dependable Cspacity (Gross MWe): 787

7. Maximum Dependable Capacity (Net MWe): 764

8. If Changes Occur in Capacity Ratings (!tems Number 3 Through 7) Since Last Report, Give Reasons:

g. Power Level To Which Restricted, if Any (Net MWe): ,

10 Reasons For Restriction,If Any:

This Month Yr.-to-Date Cumulative i t. Hours in Reporting Period 744.0 8.760.0 170.977.0

12. Number of Hours Reactor Was Critical 603.8 5.146 8 130.113.8

13. Reactor Reserve Shutdown Hours Op_ 0.0 0.0

14. Hours Generator On-Une 586.4 5.037.4 128.246.3 15 Unit Reserve Shutdown Hours 0.0 0.0 0.0

18. Gross Thermal Energy Generated (MWH) 1.330.296.0 11.513.928.0 264.357.892.0

17. Gross Electric Energy Generated (MWH) 443.811.0 3.830.916.0 85.821.898.0

18. Net Electric Energy Generated (MWH) 430.115.0 3.712.862.0 82.871.178 0 Ig. Unit Service Factor 78.8 57.5 75.0

20. Unit Availability Factor 78.8 57.5- 75.0-

21. Unit Capacity Factor (Using MDC Net) 75.7 55.j_ 63,4

22. Unit Capacity Factor (Using DER Net) 74.3 54.5 62.3

23. Unit Forced Outage Rate 21.2 3.0 4.3 -

24, Shutdown Scheduled Over Next 6 Months (Type Date, and Duration of Each):

A one to two week maintenance outaae is scheduled for March 1994.

73. If Shut Down At End of Report Period, Estimated Date of Startup: ,

26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 050-0298 UNIT CNS DATE January 7. 1994 TELEPHONE (402) 825-5487 MONTH December 1993 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 774 17 0 2 773 18 0 3 774 19 0 4 774 20 50 5 775 21 459 ,

'l 6 749 22 559  ;

l 7 755 23 733 1 8 745 24 769 9 757 25 769 I

10 774 26 767 11 758 27 768 ,

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12 735 28 769 13 774 29 770 14 50 30 770 15 0 31 _

771 16 0 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 050-0298 .

UNIT NAME Cooper Nuclear Station DATE January 7,1994 COMPLETED BY S. C. Wheeler -

TELEPHONE (402) 825-5487 REPORT MONTH December 1993 Method Of Ucensee Cause & Corrective i Duration Shutting Event System' Component' Action to 2

No. Date Type' (Hours) Reason Down Reactor' Report Code Code Prevent Recurrence 93-3 12/14/93 F 157.6 A 3 93-038 JB LC On December 14. feedwater level control RFC-LC83 failed, resulting in a reactor low level and subsequent automat ~c scram.

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! 1 F: Forced 2 Reason: 3 Method 4 Exhibit G - Instructons for S: Scheduled A - Equipment Failure (& plain) 1 - Manual Preparation of Data Entry 8 - Maintenance or Test 2 - Manual Scram Sheets for Licensee Event C - Refueling 3 - Automatic Scram Report (LER) File (NUREG4161)

D - Regulatory Restnction 4 - Continued E - Operator Training & Ucense bamination 5 - Reduced load 5 Exhibit !- Same Source i F- Administrative 6 - Other G - Operational Error (Explain)

H - Other (Explain) 4

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OPERATIONS NARRATIVE COOPER NUCLEAR STATION December 1993 Cooper Station operated at 100 percent for the month of December, with the following exceptions:

1. December 6-9 Slight derate to perform surveillance procedures.

2. December 11-12 Slight derate to perform turbine testing. ,

3. December 14-23 Automatic scram due to reactor feedwater level controller failure.

4. December 26 Slight derate to perform rod operability surveillance procedure.

A unit capacity factor of 75.7 percent (MDC Net) was attained for the month of December.

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