ML20207F653

Monthly Operating Rept for Sept 1986

ML20207F653
Person / Time
Site:	Cooper
Issue date:	09/30/1986
From:	Horn G, Jacqueline Thompson NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
CNSS867754, NUDOCS 8701060171
Download: ML20207F653 (5)

Text

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OPERATING DATA REPORT DOCKET NO. _050-0298 DATE 10-2-86 COMPLETED BY J. E. Thompson TELEPHONE (402)825-3811 OPERATING STATUS

l. Unit Name:

Cooper Nuclear Station Notes

2. Reporting Period:

September, 1986

3. Licensed Thermal Power (MWt):

2381

4. Nameplate Rating (Gross MWe):

836

5. Design Electrical Rating (Net MWe):

778

6. Maximum Dependable Capacity (Gross MWe):

787

7. Maximum Dependable Capacity (Net MWe):

764

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

9. Power Level To Which Restricted,1f Any (Net MWe):

10. Reasons For Restrictions.If Any:

i This Month Yr.-to Date Cumulative

11. Ilours in Reporting Period 720.0 6,551.0 107.400.0

12. Number Of flours Reactor Was Critical 720.0 6.492.I 81.505.2

13. Reactor Resene Shutdown llours 0.0 0.0 0.0 I4. Ilours Generator On Line 720.0 6,468.2 80,174.0

15. Unit Reserve Shutdown flours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWil) 1,108.200.0 12.483.195.0 157.345.861.0

17. Gross Electrical Energy Generated (MWil) 366,361.0 4,164,538.0 50,304,511.0

18. Net Electrical Energy Generated (MWill 3S3,632.0 4,013,097.0 48,467,457.0

19. Unit Service Factor 100.0 98.7 74.6

20. Unit Availability Factor 100.0 98.7 74.6

21. Unit Capacity Factor (Using Mi>C Net, 64.3 80.2 59.I

22. Unit Capacity Factor (Using DER Net) 63.1 78.7 58.0

23. Unit Forced Outage Rate 0.0 1.3 4.7

24. Shutdowns Scheduled Oser Next 6 Months (Type. Date.and Duration of Each):

1986 Refueling and Maintenance Outage starting October 4, 1986 with an approximate duration of 10 weeks.

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

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

Forecast Achiesed INITIA L CRITICA LITY INITIA L ELECTRICITY CO\\lM ERCI \\L OPER ATION 8701060171 860930 g

p,j773 DR ADOCK 0500 8

[

'E s

DOCKET NO.

50-298 UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME CNS DATE 10-2-86 REPORT MONTH September. 1986 COMPLETED BY ~

J.

E. Thompson TELEPHONE (402)825-3811 3?

3

.Y

' Licensee 5 r, Cause & Corrective No.

Date g

3g g

,g g 5 Event u '9 83 Action to

$5 5

3 di c Report #

<# G gu Prevent Recurrence H

u O

86-06 F

0 H

4 N/A N/A N/A An excessive unidentified leak rate in the drywell initiated a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> LC0~as required by Technical Specifi-cations.

Power was reduced to allow entry into the,drywell to invest!igate the problem. The source of the Icak was identified as the packing on the "A" Reactor Recirculation pump dis-charge valve. After the valve pack-ing was adjusted and.successfully tested, normal plant operation re-sumed. The valve packing will be replaced during the next extended outage.

I 2

3 4

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 Report (LER) File (NUREG-D-Regulatory Restriction 441her (Explain) 0161)

E Operator Training & Ucense Examination F-Administrative 5

G-Operational Error (Explain)

~

Exhibit I-Same Source (9/77)

Il-Other (Explain)

E e-

Operations Narrative Cooper Nuclear Station September 1986

-The plant' operated the month of September with no scheduled or unscheduled' shutdowns, and one unscheduled power reduction. A capacity factor of 64.3%

was achieved for'the month.

-On September 21, a high unidentified drywell: leak rate put the plant into a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> limiting condition for operation.. Power was reduced to less than 18%

. thermal to gain access to the drywell. The leakage source was found to be the discharge valve for reactor recirculation. loop "A".

The valve packing was adjusted to reduce the leak rate to an acceptable level. After succeasful valve testing, normal operation resumed.

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Ql c ~.;.m..a -

AVERAGE DAILY UNIT POWER LEVEL j

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CNSS867754 October 2, 1986 Director, Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

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

Enclosed for your information and use is the Cooper Nuclear Station Monthly Operating Status Report for September, 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, t

W Horn Di on Manager of Nuclear 6perations GRH:drf Enclosure cc:

G. D. Watson w/ enc.

A. C. Gehr w/ enc.

R. D. Martin w/ enc.

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