ML20211H021

Monthly Operating Rept for Mar 1986

ML20211H021
Person / Time
Site:	La Crosse File:Dairyland Power Cooperative icon.png
Issue date:	03/31/1986
From:	Goodman L, Malin L, Taylor J DAIRYLAND POWER COOPERATIVE
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
LAC-11505, NUDOCS 8606230006
Download: ML20211H021 (5)

Text

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NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE March 1986 At the onset of the March 1986 reporting period, reactor power was 80% Rated Thermal Power (40 MWe-net). The reactor was coasting down towacds the scheduled refueling outage.

Shutdown for refueling commenced on March 17, 1986._ At 2150, when the station loads were being shifted to the reserve feed supplied by offsite. power, the IB 2400V Reserve Feed Breaker did not close, but the IB 2400V Main Feed Breaker did open, de-energizing the IB 2400V Bus and causing a reactor scram from 72%

power. Maintenance was performed on the IB 2400V Reserve Feed Breaker.

Refueling outage activities performed during March included defueling the reactor, installing 9 new control rods, draining the reactor vessel for maintenance, Inservice Inspection, instrument calibration, and preventive maintenance. Major maintenance activities included installing a new generator plant battery, work on Shutdown Condenser valves, replacing a nozzle on the No. 3 Feedwater Heater, troubleshooting a control rod drive mechanism, relocating Overhead Storage Tank piping, installation of Overhead Storage Tank level indication, installation of a turbocharger on the 1A Alternate Core Spray Diesel, installation of other facility changes and performance of corrective maintenance items.

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o OPERATING DATA REPORT DOCKET NO. 50-409 DATE 04/03/86 COMPLETED BY Loree Malin TELEPHONE 608-689-2331 OPERATING STATUS NOTES

1. Unit Name: La Crosse Boiling Water Reactor

2. Reporting Period: 0000, 03/01/86 to 2400, 03/31/86

3. Licensed Thermal Power (MWt ): 165 i 4. Nameplate Rating (Gross MWe ): 65.3 i 5. Design Electrical Rating (Net MW e): 50

6. Maximum Dependable Capacity (Gross MWe ): 50

7. Maximum Dependable Capacity (Net MWe ): 48

8. If Changes Occur in Capacity Ratings (Items 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 744 2,160 143,883

12. Number Of Hours Reactor Was Critical 165.8 1,340.8 97,421.7

13. Reactor Reserve Shutdown Hours 0 0 478

14. Hours Generator On-Line 165.8 1,289.9 90,790.8

15. Unit Reserve Shutdown Hours 0 0 79

16. Gross Thermal Energy Generated (MWH) 22,344 176,225.5 12,635,188.1

17. Gross Electrical Energy Generated (MWH) 6,917 54,826 3,794,035 l 18. Net Electrical Energy Generated (MWH) 6,124 50,954 3,519,699 l 19. Unit Service Factor 22.3 59.7 63.1 i 20. Unit Availability Factor 22.3 59.7- 63.2

21. Unit Capacity Factor (Using MDC Net) 17.2 49.2 51.0

22. Unit Capacity Factor (Using DER Net) 16.5 47.2 48.9

23. Unit Forced Outage Rate 0 18.5 9.8

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

Refueling outage commenced March 7,1986, estimated 6 weeks.

25. If Shut Down At End Of Report Period, Estimated Date of Startup: April 16, 1986

26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION WP-6.8~

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-409 UNIT LACBWR DATE 04/03/86 COMPLETED BY L.S. Goodman TELEPHONE 608-689-2331 MONTH March 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 40 17 0 2 40 18 0 3 40 19 0 4 39 20 0 )

5 39 21 0 6 39 22 0 l l

7 35 23 0 1 I

8 0 24 0 l

9 0 25 0 10 0 26 0 i 11 0 27 0 12 0 28 0 13 0 29 0 14 0 30 0 15 0 31 0 16 0 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.

WP-6.8 l

I UNIT SHUTDOWNS AND POWER REDUCTIONS-DOCKET No. 50-409 -

UNIT NAME LACBWR DATE 04/03/86 REPORT MONTH March 1986 COMPLETED BY L.S. Goodman TELEPHONE 608-689-2331-Method of Licensee Cause & Corrective Duration Shutting Down Event System Component Action to

l No. Date Typel (Hours) Reason 2 Reactor 3 Report # Code 4 Code 5 Prevent Recurrence 86-04 03-07-86 S 578.2 C 3 86-06 EB CKTBRK .During normal shutdown for refueling outage, when the station loads were being shifted to the reserve feed ll.

l ;i l l l l l l l l supply (offsite power), the' -ll IB 2400V Reserve Feed Breaker 1

l ,i l l l l l ,

I did not close, but the IB 2400V Main Feed Breaker did i open, de-energizing the IB 2400V bus, resulting in an automatic shutdown. Mainten-l ance has been performed on the breaker during the re- [

fueling outage. l ll l 1 , 1 I 1: . l I L l' I i i , i I i i i i I i n li i i i i I i I L :i I .I I I I i I l I I I I i l l 1 1 2 3 4 Reason: Method: Exhibit G-Instructionse F: Forced _

A-Equipment Failure (Explain) 1-Manual for Preparation of Data S: Scheduled B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic. Scram Event Report (LER) File D-Regulatory Restriction 4-Other (Explain) (NUREG-0161)

E-Operator Training & License Examination F-Administrative 5 G-Operational Error (Explain) Exhibit 1 - Same Source H-Other (Explain) c____-___-__-____-___ - - _ . _ _ . - _

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D DA/RYLAND h [k COOPERAT/VE

• P.O. BOX 817

• 2615 EAST AV SOUTH

• LA CROSSE. WISCONSIN 54601 (608) 788-4000 April 3, 1986 In reply, please refer to LAC-11505 DOCKET NO. 50-409 Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555

SUBJECT:

DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)

PROVISIONAL OPERATING LICENSE NO. DPR-45 MONTHLY OPERATING DATA REPORT FOR MARCH 1986

Reference:

(1) NRC Letter, Reid to Madgett, dated September 19, 1977.

(2) NRC Letter, Reid to Madgett, dated December 29, 1977 Gentlemen:

In accordance with instructions contained in Reference (1) and Technical Specification Amendments contained in Reference (2), we are submitting information concerning operability and availability of the La Crosse Boiling Water Reactor (LACBWR) for the Month of March 1986.

Please contact us if there are any questions concerning this report.

Very truly yours, DAIRYLAND POWER COOPERATIVE ll James W. Taylor, General Manager JWT:LSG:sks cc: J. G. Keppler, Regional Administrator, NRC-DRO III John Stang, LACBWR Project Manager NRC Resident Inspector D. Sherman (ANI Library)

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