ML20093G765

Monthly Operating Rept for Aug 1984

ML20093G765
Person / Time
Site:	Cooper
Issue date:	08/31/1984
From:	Nollet M, Thomason P NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
CNSS840347, NUDOCS 8410160023
Download: ML20093G765 (5)

Text

_ __ ______________ _

OPERATING DATA REPORT DOCKET NO.

50-298 DATE 9-10-84 C0hlPLETED BY.ith Nol_let TELEPil0NE 402-825-3811 OPERATING STATUS I. Unit Name:

Cooper Nuclear Statlon N8kS

2. Reporting Period:

August, 1984 2381

3. Licensed ThermalPower(htWt):

4. Nameplate Rating (Gross blWe):

778

5. Design Electrical Rating (Net SIWel:

787

6. Statimum Dependable Capacity (Gross.\\lWe):

764

7. Staximum Dependable Capacity (Net.\\lWe):

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

9. Power Level To Which Restricted.lf Any (Net blWe):

10. Reasons For itestrictions.If Any:

This hionth Yr..to.Date cumulatlie

!!. Ilours in Reporting Perird 744.0

$,855.0 89,160.0

12. Number Of Ilours Reactor Was Critical 707.5 5,595.5 72,598.5

13. Reactor Hewrve Shutdown flours 0.0 0.0 0.0

14. Ilours Generator 0n.Line 698.4 5,545.2, 71,463.5

15. Unit Rewise Shutdown llaurs O*O 0*6 0'O

16. Gross Thermal Energy Generated (hIWil)

I,306,584.0_

10,419,087.0 140,932,245.0

17. Gross Electrical En.r?y Generated (.\\lWil) 426,418.,0,,

3.454,086.0 44,860,441.0

18. Net Electrical Energy Generated (htWil) 409,23_7_.0 3,312,235.0 41,278,894.0

19. Unit Senice factne 94*9 94'7 "O'2

20. Unit Asailability Factor 93.9 94.7 80.2

21. Unit Capacity Factor (Uning SIDC Ney 72.0 74.0 61.5

22. Unit Capacity Factor lUsing I)ER Net) 7'). 7 72.7 62.3

23. Unie Forced 0utage Rate 6.1 2.3 3.7

' 24. Shutdowns Scheduled Over Nest 6 hionths (Type.Date.und Duration of Eacht:

_ 1984 Refueling and Hnintenaner. Outage September 24, 1984, 7 monthn

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

26. Units in Test Status (Prior to Commercial 0perationt Forcent Achiesed INITIA L CRiflCALITY INITI A L ELEC TRICITY C0\\l\\tERCI AL OPER Ail 0N 0410 0023 8408 1 M

if/

PDR DOCK O$000 99 R

PDR po;;,

=

AVERAGE DAILY UNIT POWER LEVEL 50-298 DOCKET NO.

UNIT CNS 9-10-84 DATE M.F. Nollet-COMPLETED BY 402-825-3811 TELEPHONE MON 1y August, 1984 DAY

. AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 672 652 37 2

672 is 652 3

669

'600 39 4

'668 654 20 596 636 5

21 6

669 22 496 7

678 498 23 8

446 490 24 9

0 489 25 39 382 10 N

11 425 27 576-12 558 628

g 643 613 13 9

l4 654 497 30 655 W

15 3,

16 653 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.

(9/77) w-w -

,r

50--298 '

DOCKET NO.

UNITSIIU1 DOWNS AND' POWER REDUCTIONS UNIT NAME -

N' DATE 9-10-84 COMPLETED BY M. F. Nollet-REPORT MONTil August, 1984 TELEPilONE

'3 =a 3 5"

Cause & Corrective c

re L.icensee g t, c.

.2 _e E

,2.E ;43g5 Event u?

83 Action to

- o No.

Date g

3g g-oE j@

Report,

@G u

Prevent Recurrence H

Q 84-5 840808 F

45.6 H

3 84-010 NA NA liigh taperature irrlication in unin stem line break detection systs, causing Group I isolation and ser m.

Cause was hot sumer day tire taperatures and poor insulation -

around the unin stem lines. Added insulation was placed around main stem lires to prevent recurren'e.

c I

I e

3 4

1 2

I r

F: Ferced Reason:

Method:

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

Entry Sheets for Licensee C-Refueling 3 Automatic Scram.

Event Report (LER) File (NLIREG-D-Regulatory Restriction 4 Other (Explain) 0161)

E Operator Training & License Examination F Administrative 5

G-Operational Error (Explain)

Exhibit I Same Source

-(9/77)

II-Other (Explain)

(

l*

-a.

OPERATIONS NARRATIVE' COOPER NUCLEAR STATION AUGUST, 1984 The plant operated during the month of August with no' scheduled shutdowns, one (1) unscheduled shutdown, and no other unscheduled power changes.

_The unscheduled shutdown took place on August _8, 1984. It was caused by high temperature indications in the main steam line-break detection system which generated a Group I isolation signal..This caused the main steam isolation' valves (MS1V's) to. shut,' triggering a reactor scram. The high temperature indications were caused by the presence of heat from poorly insulated main steam lines and by the hot summertime conditions outside the plant which~

~

l i reduce the ability of the plant to shed internally generated heat.

.Insu at on was added around the main steam lines and has since been effective in preventing any further unwarranted Group I isolation signals from being' generated by the main steam line break detection system.

A capacity factor of 72.0% was' achieved for the month of August.

P

,1

-n,e,- > -

,r n,,-

.vn, -~

+w.cere

-ee

-t'

,e COOPER NUCLEAR STATION Nebraska Public Power District

" " * ?A*c a!'tM;%"."^i a

" ^ " ' ' '

CNSS840347 September 10, 1984 Director, Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

Monthly Operation Status Report for August 1984 Docket No. 50-298 Gentlemen:

Enclosed for your information and use is the Cooper Nuclear Station Monthly Operating Status Report for August 1984. 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, b

. V. Thomason Division Manager of Nuclear Operations PVT:lb Enclosure cc:

G. D. Watson w/ enc.

A. C. Gehr w/ene.

J. T. Collins w/ enc.

d IV' 1