ML20069L377

Monthly Operating Rept for May 1994 for Davis-Besse Nuclear Power Station Unit 1

ML20069L377
Person / Time
Site:	Davis Besse
Issue date:	05/31/1994
From:	Koch S, Jeffery Wood ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
KB-94-1279, NUDOCS 9406170375
Download: ML20069L377 (5)

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d TOLEDO E-[3lEit)PJ A Centerior Energy Cornpany EDtSON PLAZA 3OO MADtSON AVENUE TOLEDO. OHIO 43652-OOO1 June 14, 1994 KB-94-1279 Docket No. 50-346 License No. NPF-3 U.S. Nuclear Regulatory Commission Document Control Desk Vashington, D.C. 20555 Gentlemen:

Monthly Operating Report, May 1994 Davis-Besse Nuclear Power Station Unit 1 Enclosed are ten copies of the Monthly Operating Report for Davis-Besse Nuclear Power Station Unit No. 1 for the month of May 1994.

If you have any questions, please contact S. D. Koch at (419) 321-7791.

Very truly yours, J in K. Vood P ant Manager Davis-Besse Nuclear Power Station SDK/dmc Enclosures cc: Mr. J. B. Martin Region III Administrator Mr. S. Stasek NRC Senior Resident Inspector Mr. G. Vest, Jr.

NRC Senior Project Manager 9406170375 940531 ,

PDR ADOCK 05000346 ,

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. l AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50 -0346 UNIT Davis-Besse Unit 1 DATE 6-1-94 l

COMPLETED BY STEVE KOCH l

TELEPHONE 419 -321 -7791 MONTH M AY 1994 l AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL i DAY (MWe-Net) DAY (MWe-Net)  !

l 1 878 17 873 2 878 18 875 l 3 877 19 874 4 876 20 870 l I

5 874 21 849

) l 6 876 22 866  !

7 876 23 870 8 874 24 872 9 875 25 870 l

10 876 26 873 11 873 27 876 l 12 875 28 875 13 868 29 870 14 661 30 867 15 860 31 864 l 16 869 1

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, OPERATING DATA REPORT DOCKET NO 50-0346 DATE 6 94 COMPLETED BY Steve Koch TELEPHONE 419 -321 -7791 OPERATING STATUS

1. Unit Name: Davis-Besse Unit 1 Notes

2. Reporting Period., . . ..MAY 1994

3. Licensed Thermal Power (MWt).. .2772

4. Nameplate Rating (Gross MWe).. .925

5. Design Electrical Rating (Net MWe).. .906

6. Maximum Dependable Capacity (Gross MWe).. . ..913

7. Maximum Dependable Capacity (Net MWe).. .. .868

8. If Changes Occur in Capacity Ratings (items number 3 through 7) since last report, give reasons:

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

10. Reasons For Restrictions, If Any (Net MWe):

This Month Yr-to-Date Cumulative

11. Hours in Reporting Period., . . 744.00 3,623.00 138,816.00

12. Number Of Hours Reactor Was Critical.. . 744.00 3,623.00 85,863.45

13. Reactor Reserve Shutdown Hours.. . 0.00 0.00 5,532.00

14. Hours Generator On-Line.. . 744.00 3,623.00 83,646.73

15. Unit Reserve Shutdown Hours.. 0.00 0.00 1,732.50

16. Gross Thermal Energy Generated (MWH).. 2,044,405 10,018,451 215,790,220

17. Gross Electrical Energy Generated (MWH).. 676,739 3,326,296 69,666,317

18. Net Electrical Energy Generated (MWH).. . 643,447 3,163,423 65,689,793

19. Unit Service Factor.. 100.00 100.00 60.26

20. Unit Availability Factor.. . 100.00 100.00 61.51

21. Unit Capacity Factor (Using MDC Net).. . 99.64 100.59 54.52

22. Unit Capacity Factor (Using DER Net).. 95.46 96.37 52.23

23. Unit Forced Outage Rate... . 0.00 0.00 20.60

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

Scheduled maintenance and refueling outage - October 1,1994 Planned duration - 54 days

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

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

Forecast Achieved INITAL CRITICALITY INITAL ELECTRICITY COMMERCIAL OPERATION l 1

UNIT SBUTDOVNS AND POVER REDUCTIONS DOCKET NO.: 50-346 -

. UNIT NAME: Davis-Besse #1.

DATE: June 6, 1994 -

Completed by: S. D. Koch Report Month May, 1994 Telephone: (419)321 7791 C

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C ucenses t '8 C*"** ' C "******

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{j 2 o wo. Date "g 3 o

Event R. port e e

u Action to 3

01 94-05-13 S 0 B 5 N/A N/A N/A Planned power reduction to approx.

55 percent to clean low pressure condenser loop 2 waterbox.

02 94-05-20 S 0 B 5 N/A N/A N/A Moderator temperature coefficient testing.

F: Forced Reason: Method: Exhibit G - Instructions for Freparation of Data S: Scheduled A-Equipment Failure (Explain) 1-Manual Entry Sheets for Licensee Event Report (LER)

B-Maintenance or Test 2-Manual Scram File (NUREG-0161)

C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-<ontinuation f rom E-Operator Training & License Examination Previous Month Exhibit I - Same Source F-Administrative 5-Ioad Reduction

• Report challenges to Power Operated Relief Valves G-Operational Error (Explain) 9-Other (Explain) (PORVs) and Pressurizer Code Safety valves (PCSVs)

H-Other (Explain)

, OPERATIONAL

SUMMARY

May 1994 Reactor power was maintained at approximately 100 percent full power until 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> on May 13, 1994, when a manual power reduction was initiated to perform main turbine control valve testing, combined intercept valve testing, and clean the loop 2 low pressure condenser waterbox. Power was manually reduced to approximately 92 percent, at which point main turbine control valve testing was performed. Power was then manually reduced to approximately 55 percent by 0400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> on May 14, 1994, at which point the loop 2 low pressure condenser cleaning and combined intercept valve testing vere initiated. Reactor power was slowly increased to approximately 76 percent at 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br /> on May 14, 1994, and manually reduced to approximately 70 percent at 1315 hours0.0152 days <br />0.365 hours <br />0.00217 weeks <br />5.003575e-4 months <br /> on May 14, 1994 limited by condenser vacuum. Following CIV testing and loop 2 low pressure condenser waterbox cleaning, reactor power was slowly increased to 100 percent full power, which was achieved at 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br /> on May 14, 1994. Reactor power was maintained at this level until May 19, 1994.

At approximately 1755 on May 19, 1994, following maintenance on the RPS Channel 1 Reactor Trip Module, the 15 Vdc power supply failed shorting to ground. This caused NNI to produce a high Reactor Coolant System (RCS) pressure signal momentarily opening the Pilot Operated Relief Valve (PORV). The PORV was open for approximately 5 seconds and then closed. RCS pressure decreased approximately 60 psig. Following the PORV closure, Operations placed the pressurizer heaters in manual, entered the pressurizer abnormal operating procedure DB-0P-02513, and verified the FORV closed. RCS pressure and flov inputs to NNI vere transferred to RPS Channel 2 and at 1806 the pressurizer heaters were placed back in auto. At 1845 hours0.0214 days <br />0.513 hours <br />0.00305 weeks <br />7.020225e-4 months <br />, the pressurizer abnormal operating procedure was exited. At 1755 hours0.0203 days <br />0.488 hours <br />0.0029 weeks <br />6.677775e-4 months <br /> on May 19, 1994, reactor power was approximately 99 percent. At approximately 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> on May 19, 1994, reactor pcVer was slowly increased to 100 percent which was achieved at 2230 hours0.0258 days <br />0.619 hours <br />0.00369 weeks <br />8.48515e-4 months <br /> and was maintained at this level until May 20, 1994.

At approximately 2318 hours0.0268 days <br />0.644 hours <br />0.00383 weeks <br />8.81999e-4 months <br /> on May 20, 1994, a manual power reduction to approximately 97 percent power was initiated and achieved by 2345 hours0.0271 days <br />0.651 hours <br />0.00388 weeks <br />8.922725e-4 months <br />, to perform Moderator Temperature Coefficient (HTC) testing and control rod drive breaker testing. After testing completion, at 1825 hours0.0211 days <br />0.507 hours <br />0.00302 weeks <br />6.944125e-4 months <br />, reactor power was slowly increased to approximately 100 percent which was achieved at 1918 hours0.0222 days <br />0.533 hours <br />0.00317 weeks <br />7.29799e-4 months <br /> on May 21, 1994. Reactor power was maintained at this level for the rest of the month.

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