ML20199E250

Monthly Operating Rept for Dec 1998 for Davis-Besse Nuclear Power Station,Unit 1.With

ML20199E250
Person / Time
Site:	Davis Besse
Issue date:	12/31/1998
From:	Lash J, Matranga E CENTERIOR ENERGY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CCN:-P-6-98-12, NUDOCS 9901200358
Download: ML20199E250 (3)

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• Davis-Besse Nuclear Pdwer Staban rE E Y $501 North State Route 2 Oak Harbor, Ohio 43449-9760 January 13,1999 CCN: P-6-98-12 Document Control Desk U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville,MD 20852-2738 Ladies and Gentlemen:

Monthly Operating Report, December 1998 Davis-Besse Nuclear Power Station Unit 1 Enclosed is a copy of the Monthly Operating Report for the Davis-Besse Nuclear Power Station for the month of December 1998.

If you have any questions, please contact E. C. Matranga at (419) 321-8369.

Very tmly yours, "M/w

.Ja s H. Lash Plant Manager Davis-Besse Nuclear Power Station ECM/ljk Enclosure

=cc: J. E. Dyer NRC Region III Administrator A. G. Hansen NRC Project Manager l

K. S. Zellers Acting NRC Senior Resident Inspector h /

9901200358 981231 PDR ADOCK 05000346 R PDR 7b f ,,

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s f' OPERATING DATA REPORT j DOCKET NO. 50-0346 UNIT NAME Davis-Besse Unit 1 DATE January 4.1999 .

COMPLETED BY E. C. Matranaa TELEPHONE 419-321-8369 I

REPORTING PERIOD December,1996 i 4

.YEAB  ;

m MONTH DATE CUMULATIVE i

1 Design Electrical Rating (MWe-Net). 906 I The nominal net electrical output of I the unit specified by the utility and used for the purpose of plant design.

2 Maximum Dependable Capacity (MWe-Net). 873 i The gross electrical output as measured at the output terminals of the turbine-generator during the most restrictive seasonal conditions minus the normal station' service loads.

3 Number of Hours the Reactor Was Critical. 744.0 7,291.7 121,723.9 The total number of hours during the gross hours of the toporting period that the reactor was critical.

4 Number of Hours the Generator Was On Line. 744.0 7,183.9 119,271.7 4 (Also called Service Hours). The total l J

number of hours during the gross hours of the reporting period that the unit operated with breakers closed to the station bus. i The sum of the hours the generator was on line plus the total outage hours should equal the gross hours in the reporting period. l 5 Unit Reserve Shutdown Hours. 0.0 0.0 5,532.0 The total number of hours during the gross hours of the reporting period that the unit was removed from service for economic or similar reasons but was available for j operation. '

6 Net Electrical Energy (MWH), 661,803 6,130,676 96,357,233 The gross electrical output of the unit i measured at the output terminals of the turbine-generator minus the normal station i service loads during the gross hours of l the reporting perlod, expressed in mega-l watt hours. Negative quantities should not be used.

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UNIT SHUTDOWNS

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DOCKET NO. 50-346 ' -

UNIT NAME Davis-Besse #1 .

DATE January 4,1999 COMPLETED BY E. C. Matranga REPORTING PERIOD: December.1998 TELEPHONE (419) 321-8369 NO. DATE TYPE DURATION REASON (1) METHOD OF CAUSE/ CORRECTIVE ACllONS F: FORCED (HOURS) SHUTTING S: SCHEDULED DOWN (2) COMMENTS No Unit Shutdowns m

SUMMARY

Reactor power was maintained at approximately 100% full power for the majority of the month. On December 13,1998, at 0130 hours0.0015 days <br />0.0361 hours <br />2.149471e-4 weeks <br />4.9465e-5 months <br />, reactor power was reduced to approximately 95% to perform Control Rod Drive exercising and turbine valve testing. At the completion of testing at 0434 hours0.00502 days <br />0.121 hours <br />7.175926e-4 weeks <br />1.65137e-4 months <br />, power was increased to 100%.

(1) Reason: (2) Method:

A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Trip / Scram C-Refueling 3-Automatic Trip / Scram D-Regulatory Restriction 4-Continuation E-Operator Training & License Examin 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H-Other (Explain)