ML20076G196

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

ML20076G196
Person / Time
Site:	Davis Besse
Issue date:	09/30/1994
From:	Wolf G, Jeffery Wood TOLEDO EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
KB-94-1723, NUDOCS 9410190167
Download: ML20076G196 (6)

Text

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TOLEDO

%ms EDISON i A Centerior Energy Company  ;

EDISON Pl.AZA '!

300 MADISON AVENUE TOLEDO. OHIO 43652-0001 ,

October 14, 1994 t

KB-94-1723 Docket No. 50-346 License No. NPF-3 U.S. Nuclear Regulatory Commission Document Control Desk Vashington, D.C. 20555 Gentlemen:

Monthly Operating Report, September, 1994  ;

Davis-Besse Nuclear Power Station Unit 1 .

Enclosed are ten copies of the Monthly Operating Riport for Davis-Besse Nuclear Power Station Unit No. I for the month of: September, 1994.

If you have any questions, please contact G. H. Volf at-(419) 321-8114.

Very truly yours, J hn K. Vood Plant Manager Davis-Besse Nuclear Power Station GHV/dmc Enclosures cc: L. L. DurAlas NRC Do bt h /' ject Manager J. B. Hartin Region III Administrator S. Stasek NRC Senior Resident Inspector, Stop 4030 i l

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9410190167 940930 6 PDR ADOCK 0500 ff?' ,l

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-0346 UNIT Davis-Besse Unit 1 DATE 10-3-94 COMPLETED BY Gerry Wolf TELEPHONE 419-321 -8114 MONTH SEPTEMBER 1994 AVERAGE DAILY POWER LEVEL AVERAGE DALLY POWER LEVEL DAY (MWe-Net) DAY (MWe-Net) 1 728 17 620 2 711 18 516 3 550 19 569 4 566 20 619 5 669 21 592 6 691 22 592 7 695 23 577 8 674 24 436 9 672 25 419 10 667 26 580 11 658 27 E77 12 654 28 556 l

13 626 29 552 l l

14 618 30 509 1 15 554 1

16 618 l

OPERATING DATAREPORT DOCKET NO 50-0346 DATE 10 94 COMPLETED BY Gerry Wolf TELEPHONE 419 - 321 - 8114 OPERATING STATUS

1. Unit Name: Davis-Besse Unit 1 Notes

2. Reporting Period SEPTEMBER,1994

3. UcensedThermalPower(MWt) 2772

4. Nameplate Rating (Gross MWe) 925

5. Design ElectricalRating (Net MWe) 906

6. Maximum DependableCapacity (Gross MWe) 913

7. Maximum Dependable Capacity (Net MWe) 868

8. If Changes Occurin CapacityRatings (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 720.00 6,551.00 141,744.00

12. Number Of Hours Reactor Was Critical 720.00 6,551.00 G8,791.45

13. Reactor Reserve Shutdown Hours 0.00 0.00 5,532.00

14. Hours GeneratorOn-Une 720.00 6,551.00 86,574.73

15. Unit Reserve Shutdown Hours 0.00 0.00 1,732.50

16. Gross Therma! Energy Generated (MWH) 1,404,406 17,425,014 223,196,783

17. Gross Electrical Energy Generated (MWH) 462,443 5,759,822 72,099,843

18. Net Electrical Energy Generated (MWH) 433,566 5,469,441 67,995,810

19. Unit Service Factor 100.00 100.00 61.08

20. Unit Availability Factor 100.00 100.00 62.30 .

21. Unit Capacity Factor (Using MDC Net) 69.38 96.19 55.27 j

22. Unit Capacity Factor (Using DER Net) 66.47 92.15 52.95

23. Unit Forced Outage Rate 0.00 0.00 20.04

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

Scheduled maintenance and refueling outage - October 1,1994.

Planned duration - 45 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 INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO.: 50-346 ,

UNIT NAhlE: Davis-Besse #1 DATE: October 5.' 1994 Completed by: G. ht Wolf Report hionth September 1994 Telephone: (4191321-8114

=q e gy n Liceesee

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Cause & Corrective

( jg g } j= y Event gj. [j Action to No. Date t.-

C; y

yg5 e RW# gu gu Prevent Recurrence

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4 94-09-02 F 0 B 5 N/A N/A N/A Unscheduled power reduction for repair of steam leak at htFP 1 drain line.

5 94-09-14 S 0 B 5 N/A N/A N/A Scheduled power reduction to remove Circulating Water Loop 1 from service.

6 94-09-17 S 0 B 5 N/A N/A N/A Scheduled power reduction to reraove i Circulating Water Loop 1 from service.

. i 7 94-09-24 5 0 B 5 N/A N/A N/A Scheduled power reduction to remove Circulating Water Loop 1 from service.

8 94-09-30 S 0 C 5 N/A N/A N/A Plant shutdown initiated to start maintenance and refueling outage.

I 2 3 4 F: Forced Reason: hiethod: Exhibit G -Instructions for Preparation of Data S: Scheduled A-Equipment Failure (Explain) 1-h1anual Entry Sheets for Licensee Event Report (LER)

B-htaintenance or Test 2-h1anual Scram File (NUREG-0161)

C-Refueling 3-Automatie Scram D-Regulatory Restriction 4-Continuation from 5 -

E-Operator Training & License Examination Previous h1onth Exhibit I - Same Source F-Administrative 5-Load Reduction

• Report challanges to Power Operated 141ief Valves G-Operational Error (Explain) 9-Other (Explain) (PORVs and Pressurizer Code Safety Valves (PCSVs)

Il-Other (Explain)

_ _ . . _ . . . _ _ . .~. . . _ _ _ _ _ _ _ _ . . _ _ . . _ . - . _ . . _ . . - . . . . . . - . _ . _ . _ . _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ . -

OPERATIONAL

SUMMARY

(All power levels stated are approximate. All power changes were at three percent per hour unless otherwise stated.)

Reactor power was maintained at 85 percent full power until 1025 hours0.0119 days <br />0.285 hours <br />0.00169 weeks <br />3.900125e-4 months <br /> on September 1,1994, when a manual power reduction was initiated in accordance with the cycle coastdown schedule. The power reduction to 82 percent was completed at 1218 hours0.0141 days <br />0.338 hours <br />0.00201 weeks <br />4.63449e-4 months <br />.

On September 2 at,2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br />,, an unplanned er reduction was initiated to repair a leak in the drain piping for Main Feed Pump (FP) 1. Power was manually reduced to 60 percent by 0441 hours0.0051 days <br />0.123 hours <br />7.291667e-4 weeks <br />1.678005e-4 months <br /> on September 3, an MFP 1 was removed from service for repairs. At 1023 hours0.0118 days <br />0.284 hours <br />0.00169 weeks <br />3.892515e-4 months <br /> reactor power was gradually increased to 65 percent full power, which was achieved at 1435 hours0.0166 days <br />0.399 hours <br />0.00237 weeks <br />5.460175e-4 months <br />. Sixty-five percent full power is the maximum wer level when only one MFP is operating. When MFP 1 repairs were complete at 19 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> on September 4, a gradualpower increase was initiated. This power increase was stopped at 75 percent power at 2356 hours0.0273 days <br />0.654 hours <br />0.0039 weeks <br />8.96458e-4 months <br /> at the load dispatcher's request. On September 5 at 1157 hours0.0134 days <br />0.321 hours <br />0.00191 weeks <br />4.402385e-4 months <br /> reactor power was gradually increased to 80 percent full power, which was achieved at 1425 hours0.0165 days <br />0.396 hours <br />0.00236 weeks <br />5.422125e-4 months <br />.

Power continued to be manually reduced at the approximate rate of three percent every

- three days in accordance with the coastdown schedule:

Dalc lung Power History 9/08/94 0220 Commenced power reduction from 80%

0305 Completed power reduction at 78%

9/10/94 1328 Commenced power reduction from 78%

1500 Completed power re:1uction at 76%

9/13/94 0517 Commenced power reduction from 76%

0623 Completed power reduction at 73%

On September 14 at 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br />, a planned power reduction was initiated to remue Circulating Water Loop 1 from service for maintenance. Power was manually r:duced to 65 percent by 0110 hours0.00127 days <br />0.0306 hours <br />1.818783e-4 weeks <br />4.1855e-5 months <br /> on September 15, and Circulating Water Pump 1 was '

removed from service. Circulating Water Pump 1 was the only operating pump in Circulating Water Loop 1 because Circulating Water Pum out for maintenance. Because of atmospheric conditions, p 2 motor condenser pressure rosewas abovepreviously taken expected values, and at 0115 hours0.00133 days <br />0.0319 hours <br />1.901455e-4 weeks <br />4.37575e-5 months <br />, power was manually reduced to restore normal condenser pressure. By 0135 hours0.00156 days <br />0.0375 hours <br />2.232143e-4 weeks <br />5.13675e-5 months <br /> power had been reduced to 60 percent, and by 0202 hours0.00234 days <br />0.0561 hours <br />3.339947e-4 weeks <br />7.6861e-5 months <br /> power had been reduced to 55 percent, but condenser pressure remained above normal. At 0245 hours0.00284 days <br />0.0681 hours <br />4.050926e-4 weeks <br />9.32225e-5 months <br />, Circulating Water Pump I was restarted to restore normal condenser hours, the power pressure. At 0300 increase was comp hours,leted at 73 percent full power.a gradual power in 1

1 I

On September 17 at 2300 hours0.0266 days <br />0.639 hours <br />0.0038 weeks <br />8.7515e-4 months <br />, another planned power reduction was initiated to remove Circulating Water Loop 1 from service for maintenance. Power was manually reduced to 60 percent by 0348 hours0.00403 days <br />0.0967 hours <br />5.753968e-4 weeks <br />1.32414e-4 months <br /> on September 18. Because of weather conditions, it did not seem favorabfe to remove Circulating Water Loop 1 from service at this time for maintenance. Therefore at 1038 hours0.012 days <br />0.288 hours <br />0.00172 weeks <br />3.94959e-4 months <br /> on September 19 a gradual power increase was initiated. At 1530 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.82165e-4 months <br />, the power increase was completed at 73 percent full power.

Power continued to be manually reduced at the approximate rate of three percent every three days in accordance with the coastdown schedule:

Dale Ilme Power Historv 9/20/94 1757 Commenced power reduction from 73%

1841 Completed power reduction at 70% i 9/22/94 1850 Commenced power reduction from 70%

1956 Completed power reduction at 67%

On September 24 at 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, another planned power reduction was initiated to remove Circulating Water Imop 1 from service for maintenance. Power was manually reduced to 55 percent by 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br />, and Circulating Water Pump I was removed from service. Because of atmos condenser pressure rose above expected values, and at 2250 hours0.026 days <br />0.625 hours <br />0.00372 weeks <br />8.56125e-4 months <br />,pheric conditions, lly reduced to restore normal power was manua condenser '

pressure. By 0000 on September 25, power had been reduced to 46 percent. At the i Ioad Dispatcher's request (due to storms in the area),, Circulating Water Pump I was ,

restarted at 1149 hours0.0133 days <br />0.319 hours <br />0.0019 weeks <br />4.371945e-4 months <br /> and a gradual power increase mitiated. At 2105 hours0.0244 days <br />0.585 hours <br />0.00348 weeks <br />8.009525e-4 months <br />, the power '

increase was completed at 67 percent full power. ,

1 Power continued to be manually reduced in accordance with the coastdown schedule:

Date Ilme Power History I

9/28/94 0720 Commenced power reduction from 67%

0825 Completed power reduction at 64%

9/29/94 1400 Commenced power increase from 64%

1503 Completed power increase at 65 %  ;

9/29/94 0746 Commenced power increase from 65 %

0810 Completed power increase at 66% j On September 30, at 1800 hu'rs, a plant shutdown was initiated to start the Ninth Refueling Outage. Power wa.s reduced at a rate of eight percent per hour, and the Main Turbine was tripped on October 1 at 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />.