ML20052G203

Monthly Operating Rept for Mar 1982

ML20052G203
Person / Time
Site:	Cooper
Issue date:	04/05/1982
From:	Ballinger P NEBRASKA PUBLIC POWER DISTRICT
To:
Shared Package
ML20052G198	List: ML20052G197 ML20052G203
References
NUDOCS 8205140402
Download: ML20052G203 (4)

Text

9 OPERATLNG DATA REPORT DOCKET NO.

050-298 DATE April 5, 1982 COMPLETED BY P. L. Ballinger TELEPHONE 402-825-3811

• ~

OPERATING STATUS Cooper Nuclear Station Notes

1. Unit Name:

2. Reporting Period: March 1982 2381

3. Licensed Thermal Power (MWt):

836

4. Nameplate Rating (Gross MWe):

778

5. Design Electrical Rating (Net MWe):

787

6. Maximum Dependable Capacity (Gross MWe):

7D4

7. Maximurn Dependable Capacity (Net MWe):

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

9. Power Le re! To Which Restricted,If Any (Net MWe):

None

10. Reasons For Restrictions,if Any:

This Month Yr.-to.Date Cumulative 744.0 2,160.0 67,945.0

11. Hours In Reporting Period 686.9 2,102.9 55,989.3

12. Number Of Hours Rezetor Was Critical 0.0 0.0

'0.0

13. Reactor Reserve Shutdown Hours

14. Hours Generator On-Line 679.3 2,095.3 55,052.8

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 1,510,176.0 4,735,104.0 108,423,582.0

17. Gross Electrical Energy Generated (MWH) 504. 28 3.,Q.

1.577.045.0 34.057.832.0 489,325.0 1,528,273.0 32,825,651.0

18. Net Electrical Energy Generated (MWH) l

19. Unit Service Factor 91.3 97.0 ~

81.0 91.3 97.0 81.0

20. Unit Availability Factor

21. Unit Capacity Factor (Using MDC Net) 86.1 92.6 63.2 84.5 90.9 62.1

22. Unit Capacity Factor (Using DER Net) 8.7 3.0 4.0

23. Unit Forced Outage Rate

24. Shutdowns Scheduled Over Next 6 Months (Type. Date.and Duration of Each1:

1 Rnfun14ng, m y

'9 10Q9 A, mi g l

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

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

Forecast Achieved INITIA L CRITICALITY INITI A L ELECTRICITY l

COMMERCIA L OPER ATION O205140402 820405 PDR ADOCK 05000298 cm7 PDR l

9

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

050-298 UNIT Cooper Nuclear Stat.

DATE._ April 5, 1982 t

COMPLE'IED BY P. L. Ballinger TELEPHONE 402-825-3811 MONTH __ March DAY AVER AGE DAILY POWER LEVEL DAY AVER AGE DAILY POWER LEVEL (MWe Net)

(MWe-Net) 1 766 37 752 2

774 gg 753 3

774 39 739 775 255 4

20 5

776 21 0

6 774 22 0

302 768 33

,, 7 8

771 23 659 9

769 25 716 10 766 26 705 705 13 758 27 609 12 755 g

13 753 748 29 752 14 558 30 745 15 721 31 16 764 INSTRUCTIONS On this format. list the average daily unit power levelin MWe Net for each day in the reporting month. Compute to the nearest whole megawatt.

(9/77)

050-298 DOCKETNO.

C Per auclear Stat.

UNIT Sil01 DOWNS AND POWER REDUCTIONS UNIT N AME DATE April 5, 1982 COMPLETED llY P. L.

Ballinter March REPORT MONTil TELEPHONE 402-825-3811 3

Lic(asce 31, b't Caese & Corrective

!E 3

h Yk No.

Date g

3g 4

,3 g 5 Event

?

E.?

Action to t

$E j@g Report e tN G l

fU Prevent Recurrence d

82-4 820314 S

0 H

N/A N/A N/A N/A Power was reduced to adjust the control i

rod pattern. All rods were withdram from the core and the end of cycle coast down started.

82-4 820320 F

64.7 A

3 N/A N/A N/A An intermittent source of spikes and l

fluctuations in the main generarir vol tage regulator system in the automatic mode of operation was noticed in Jan-uary and February 1982. On March 22, 1982, to stop these spikes, the voltag e regulator control system was transferred f

from automatic operation to manual op-eration and a generator trip resulted.

A circuit card in the voltage regulato r system was replaced and some adjustmeri ts l

to the circuitry were made to improve l

the voltage regulator operation. The

(

generator was returned to service and i

no spikes were observed, however, a g e<n,,<ng ortsre se,,nAoruny en nn-j alyze thig problem.

3 l.

I 2

Method:

Exhibit G -Instructions F: Forced Reason:

1-Manual for P<eparation of Data l

S: Scheduled A-Equipment Failure (Explain) 2 Manual Scram.

Entry Sheets for Licensee I

(1-Maintenance or Test 3 Automatic Scram Esent Report (LER) File INURIG C-Refueling 4 Other (Explain) 0161)

D Regulatory Restriction E-Operator Training & Licenv Et mination 5

F Administralise Eshibit I Same Source G-Operational Error (Explain t p)/77) ll Other (Explain)

E

4 OPERATIONS NARRATIVE Cooper Nuclear Station March 1982 A power reduction was taken on March _14 to adjust the control rod pattern. All the control rods were withdrawn from the core at that time and the end of cycle power coastdown started.

On March 20, 1982, voltage spikes in the main generator field voltage regulator system were observed and were similar to spikes observed in January and February 1982. To stop these spikes, the operator trans-ferred the voltage regulator control from automatic operation to manual operation. This action resulted in a generator voltage decrease and loss of excitation.

The generator tripped on loss of excitation and the reactor subsequently scrammed.

An examination of the voltage regulator system was made to find the problem. A marginal circuit board was replaced and some adjustments were made to the voltage regulator circuitry to improve its operation but a definitive cause of the problem could not be found. The generator was returned to-service on March 23, 1982 and no voltage spikes have been observed. A continuing effort to analyze this problem is under way.

The plant operated the remainder of March with no reductions or outages.

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