ML19325C917

Monthly Operating Rept for Sept 1989 for Cooper Nuclear Station.W/891010 Ltr

ML19325C917
Person / Time
Site:	Cooper
Issue date:	09/30/1989
From:	Horn G, Jacqueline Thompson NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CNSS898352, NUDOCS 8910180100
Download: ML19325C917 (5)

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f' .:., . . , . -. COOPER NUCLEAR ST ATION Nebraska Public Power District "^" Xt'is =??n n,"a,^5,"^ "'"-

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. i October 10..1989-s Ik s 1

- y& Document' Control Desk- t

,T . U.S.: Nuclear Regulatory Commission-

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Washington, D.C. !20555 ,

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Subject:

' Monthly Operation Status Report for September 1989 ..

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Docket- No. 50-298 1

1 Gentlemen:

Enclosed for your'information~and use is,the Cooper Nuclear Station MonthlyJ 10p' e rating Status Report for September 1989. The report includes Operating ~

Status,LAverage: Daily. Unit Power Level Unit' Shutdown Data,'.and.a: Narrative

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Summary of Operating: Experience.

Should you.have any-' comments or-require additional information.regarding'this- -q

-report, please' contact me. ,

' Sinc ely,.

d G. .

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Div 'sion Manager of Nuclear _0perations GRH/KJW:nd ,

JEnclosure.

10.:D. Watson w/ene. '

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' OPERATING DATA REPORT.

' DOCKET NO. 050-0298

<' DATE October 10, 1989-COMPLETED BY J. E. Thompson (402) 825-3811 TELEPHONE

< . OPERATING STATUS

,o 1. Unit Names Cooper Nuclear Station Notes 2.-; Reporting Period: SeptMmber 1989

3. Licensed Thermal P mer (MWt): 2381

'4 Nameplate Rating (Cross MWe): 836

$. Design Elwtrical Rating (Net MWe): 778

6. Maximum Dependable Capacity (Cross MWe): 787

7. .

Maximus Dependable Capacity (Net MWe): 764 'j If Changes occur it. Capacity ratings (Items Number 3 Thrcugh 7) Since Last Report, Give Reasons: I 8.

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

10. Reasons For Restrict S n, If Any q i

This Month Yr.-to-Date Cumulative )

~ 11. Hours In Reporting Peritd 720.0- 6,551.0 1.13,704.0-I 1 12. Number of Hours Reactor Was Critical 675.7 4,589.1 100,564.4 l

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0 j 14 Hours Generator On-Line -664.3 4,527.0 98,961.6 15.' Unit Reserve Shutdown Hours 0.0 0.0 0.0 16.- Gross Tt.ersal Energy Generated (HWH) 1,541,520.0 10,184,856.0 197,915,580.0

17. Cross Electrical Energy Generated (MWH) 510,564.0 3,361,770.0 63,754,591.0

18. Net Electrical Energy Generated (MWH) 494,837.0 3.255,027.0 61,484,261.0

19. Unit Service Factor 92.3 69.1 74.0 92.3 69.1 74.0 -'

20. Unit Availability Factor-21.' Unit Capacity Factor (Using MDC Net) 90.0 _

65.0 60.2 j

'2. Unit Capacity Factor (Using DER Net) _ 88.3 63.9 59.1 l

23. Unit Forced Outage Rate 7.7 6.7 4 .,8 24 Shutdown Scheduled Over Next 6 Months (Type, Date, and Duration of Each): 1 Rerueline and Maintenance Outace 13. scheduled March 4.1990. 6 week duration.__

25. If Shut Down At End of Report Period, Estimated Date of Startups  !

26.. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY 1

C0tHERCIAL PaERATION l i

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, AVERAGE DAILY UNIT POWER LEVEL u

-DOCKET NO.. 050-0298-

e. 1-b UNIT ~ CNS

,. DATE. October- 10.-1989 COMPLETED BY J. E; Thompson TELEPHONE (402)/825-3811

' MONTH September 1989-DAY: ~ AVERAGE DAILY. POWER LEVEL- DAY AVERAGE DAILY POWER LEVEL-(MWe-Net) .(MWe-Net) sg 1.- ._

-758- 17 563 q 2' 755- 18 693 3 -752 19 -765

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'760' 20 765 i: .

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< -9 756 25 769 10 :751 26 771

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N 12: 765 28 371  :

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765 29 0

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14 --765 30 16 1'5 767 31 --

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1 INSTRUCTIONS-  !

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On_ this- format, list' th'e average daily unit power level in MWe-Net for each day in y.i. .: .the: reporting' month. Compute to the nearest whole megawatt. -l l:T: , j

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' DOCKET NO..

UNIT SHUTDOWNS AND POWER REDUCTIONS.

Cooper MuClear Station- S

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_ DATE October 10, 1989 ^- -

COMPLETED BYi J. E. Thompson ~ * ~

REPORT MONTH ~ September 1989  : TELEPHONE' (402) 825-3811e

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Method of Licensee .4 Cause & Co m etive -

Duration Shutting: ~ Event System Caspotent3

• Action to '

2 3 No .' Date Tvpe (Hours)- Reason Down Reactor  :

Report #- Code Code l Prevent Recurrence _

89-08 890917 'S 12.0 B 5 1N/A' N/A 'N/A Load reductionTto repairla steam leak,: perform MSIV closureite's ting} 1 and turbine . testing, 'and backwash 1 -

debris fromthe condenser.. A' control rod sequence exchange was-performed.

89-09 890928 F 55.7 H 3 * *

• Reactor scram occurred due to 'a spurious actuation of thel -

Turbine-Generator. Digital' Electro--

hydraulic-fluid reservoir low.

level trip circuit.. ?A detailed investigation was. undertaken to determine the root cause as a mechanical' agitation due to' abnormal unloader valve actuation.

I 1 F: Forced - 2 Reason: . 3' Method: . 4 Exhibit C. -Instructions" for -

S: Scheduled A - Equipment Fai7ure (Explain) 1 - Manual Preparation of Data Entry .

3 - Maintenarce or Test Manual Scram Sheets for Licensee Event

~ C - Rsfueling :_ .

l3 - Automatic Scram . Repert (LER) File.(NUREG-0161)1 D.- Regulatory Restriction , . .

4 - Continued E - Operator Training & License Examination -- 5 - Reduced load 5 - Exhibit -1'- Sase Scurce -

F - Administrative 6 -' Other 1 -

G - Operational Error (Explain).

H ,Other (Explain)

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• LER Number, System Code, . and Conponent Code': have. not ' been designated < atithe; time : of 4 this report. :

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. 0PERATIONS NARRATIVE ,

Cooper Nuclear Station September 1989 i'

j. . A 36 percent reduction in power was scheduled on September 17 for steam leak ,

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repairs on Moisture Separator."D",' Turbine manway cover and joint. Turbine '

testing and MSIV closure testing was also performed. A' control rod. sequence

• exchange was performed' and reactor power.was slowly ramped up af terward.

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F: On September 28 a' spurious actuation of- the Turbine-Cent rator Digital Electro-Hydraulic fluid; reservoir low. level trip circuit resulted in a reactor scram. .The.DEH System was inspected and tested to determine the root cause which was' attributed to mechanical agitation caused by abnormal unloader valve actuation. This occurred after shifting DEH pumps. Startup surveillances were performed on September 29 and the plant was started up on September 30, 1989.

A capacity factor of 90.0 percent was achieved for the month of September 1989.-

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