ML20197D128

Monthly Operating Rept for Feb 1986

ML20197D128
Person / Time
Site:	Cooper
Issue date:	02/28/1986
From:	Horn G, Sutton K NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
CNSS860190, NUDOCS 8605140158
Download: ML20197D128 (5)

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4 OPERATING DATA REPORT DOCKET NO.

050-0298 DATE 3-7-86 COMPLETED BY K.

E.

Sutton TELEPHONE (402)825-3811 OPERATING STATUS

1. Unit Name:

Cooper Nuclear Station Notes

2. Reporting Period:

February 1986

3. Licensed Thermal Power (MWt):

2381

4. Nameplate Rating (Gross MWe):

836 778

5. Design Electrical Rating (Net MWe):

6. Maximum Dependable Capacity (Gross MWe):

787 764

7. Maximum Dependable Capacity (Net MWe):

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

9. Power Level To Which Restricted,If Any (Net MWe):

10. Reasons For Restrictions,If Any:

This Month Yr to-Date Cumulative

11. Hours in Reporting Period 672.0 1,416.0 102,265.0

12. Number Of Hours Reactor Was Critical 644.0 1.388.0 76.40I.I

13. Reactor Reserve Shutdown Hours 0.0 0.0 O.0

14. Hours Generator On.Line 632.0 1,376.0 75,081.8

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 1,471,661.0 3,209,093.0 148,071,759.0

17. Gross Electrical Energy Generated (MWH) 496,004.0_

1,084,497.0 47,224,470.0

18. Net Electrical Leergy Generated (MWH) 477,426.0 1,043,79I.0 45,498,I5I.0 l

19. Unit Senice Factor 94.0 97.2 73.4 l

20. Unit Availability Factor 94.0 97.2 73.4

21. Unit Capacity Factor (Using MDC Net).

93.0 96.5 58.2

22. Unit Capacity Factor (Using DER Net) 91.3 94.7 57.2

]

23. Unit Forced Outage Rate 5.9 2.8 4.9

• 24. Shutdowns Scheduled Over Next 6 Months (Type. Date, and Duration of Each 3:

l l

25. If Shut Down At End Of Report Period. Estimated Date of Startup:

26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved INITIA L CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPER ATION 8605140158 860228 PR ADOCK 05000298

'hh I"IID PDR f

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

050-0298 LWIT CNS DATE 3-7-86

_CO.\\fPLETED BY K. E. Sutton TELEPHONE (402)825-38l1

.\\f0 NTH February, 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (5sWe-Neti 15f We-Net) 2 152 18 775 3

754 4

780 20 778 5

779 21 777 6

778 22 770 7

777

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__.. 2.7 a _...._.

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774 24 775 -'

9 754 25 763 10 770 26 775 11 770 27 131.3 12 773 2S 21.3 13 752 29 14 771 30 15 655 31 16 776 INSTRUC~'ONS On this format.!is: the ner2;e dady unit power I: vel in MWe Net for each day :n the reporting month. Comnute the nearest whole me;2w.itt.

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050-0298 DOCKET NO.

UNIT SilU1 DOWNS AND POWER REDUCTIONS UNIT N AME CNS 3-7-86 DATE COMPLETED BY K.

E.

Sutton REPORT MON 111 February 1986 TELEPHONE (402)825-3811 "E

E Licensee

,E t, jvb Cause & Corrective

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,j E 3 gg5 Event sT o3 Action to No.

Daic h

3g 3-H

$E 5

j5g Report #

u$0 0

Prevent Recurrence 6

During the performance of a Special 86-01 860227 F

40 0

3 Procedure to transfer operation from two RF pumps to a single RF pump, an error in the procedure allowed a mismatch of feed pump flow and steam flow.

This resulted in a decreasing reactor water level and caused a low water level scram.

The Special Procedure for single Reactor Feed Pump (RFP) operation overestimated available single RFP flow at reduced power (approx. 72% power).

• Not a /aila )le at t Te titie of tl.is report.

A Special Order has been issued which has placed more restrictive guidance on single RFP operation.

i I

2 3

4 I

F: Forced Reason:

Method:

Exhibit G - Instructions S: Scheduled A Equipment Failure (Explain) 1 Manual for, Preparation of Data B-Maintenance of Test 2-Manual Scram.

Entry Sheets for Licensee C Refueling 3 Automatic Scram.

Event ReporI (LER) File (NUREG-D Regulatory Restriction 4 Other (Explain) 0161)

E-Operator Training & License Examination F-Administrative 5

Exhibit I Same Source G Operational Error (Explain)

(9/77) ll Other (Explain)

.e s

Operations Narrative Cooper Nuclear Station February, 1986 The plant operated the month of February with no scheduled shutdowns, one (1) unscheduled shutdown on February 27 and no other unscheduled power changes.

The unscheduled shutdown on February 27 was caused by operating at too high of a power level for single Reactor Feed Pump (RFP) operation. The reactor scram followed a switch from two pump to single pump operation. A special procedure was being implemented to take RFP-1A off-line for repairs. Power was to remain constant by simultaneously increasing flow from RFP-1B while decreasing flow from RFP-1A and removing it from service. During the transfer RFP-1E engaged an upper speed stop prior to reaching its desired flow resulting in a declining reactor water level and subsequent scram on low water level.

Investigation revealed problems with the single RFP special procedure.

Repairs to RFP-1A were completed during cold shutdown. On February 28 procedures were implemented to bring the plant back into service (two pump operation). The plant was placed on-line February 28.

A capacity factor of 93.0 was achieved for the month of February.

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P COOPER NUCLEAR STATION Nebraska Public Power District a "

"'A"c" "O='ts;"ga^5*a "

s CNSS860190 March 7, 1986 s

Director, Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

Monthly Operation Status Report for February 1986 Docket No. 50-298 Gentlemen:

Enclosed for your information and use is the Cooper Nuclear Station Monthly Operating Status Report for February 1986. 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,

. h orn Division Manager of Nuclear Operations GRH:lb Enclosure cc:

G. D. Watson w/ enc.

A. C. Gehr w/ene.

R. D. Martin w/ene.

,,L

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