ML20154H580

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

ML20154H580
Person / Time
Site:	Davis Besse
Issue date:	09/30/1998
From:	Lash J, Matranga E CENTERIOR ENERGY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CCN:P-6-98-09, CCN:P-6-98-9, NUDOCS 9810140258
Download: ML20154H580 (3)

Text

.- .

gn= men =

Daws-Besse Nuclear Power Station

• y. y 5501 Neth State Route 2 '

Oak Harbor. Ohio 43449-9760 October 13,1998 CCN: P-6-98-09 1

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, September 1998 Davis-Besse Nuclear Power Station Unit 1 l

Enclosed is a copy of the Monthly Operating Report for the Davis-Besse Nuclear Power Station for the month of September 1998.

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

l Very truly yours, i

H Wlct l James H. Lash Plant Manager Davis-Besse Nuclear Power Station ECM/ljk Enclosure cc: J. L. Caldwell NRC Region C Acting Administrator A. G. Hansen NRC Project Manager S. J. Campbell NRC Senior Resident Inspector 9810140258 990930 PDR ADOCK 05000346 R PDR l

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

3 OPERATING DATA REPORT DOCKET NO.- 50-0346 UNIT NAME Davis-Besse Unit 1 DATE October 2,1998 COMPLETED BY E. C. Matranaa l TELEPHONE -419-321-8369 '

' REPORTING PERIOD September,1998 YEAR IQ MONTH DAIE CUMULATIVE 1 Design Electrical Rating (MWe-Net). 906 The nominal net electrical output of the unit specified by the utility and used for the purpose of plant design.

2 Maximum Dependable Capacity (MWe-Net). 873

! The gross electrical output as measured at the output terminals of the turbine-generator during the most restrictive i

seasonal conditions minus the normal I station service loads. j 3 Number of Hours the Reactor Was Critical. 688.1 5,203.1 119,635.3 The total number of hours during the i gross hours of the reporting period that

]

the reactor was critical.

4 Number of Hours the Generator Was On Line. 678.7 5,114.9 117,202.7

' (Also called Service Hours). The total number of hours during the gross hours of the reporting period that the unit operated with breakers closed to the station bus.

The sum of the hours the generator was on line plus the total outage hours should equal the gross hours in the reporting period. -

5 Unit Reserve Shutdown Hours. 0.0 0.0 5,532.0 The total number of hours during the gross l

hours of the reporting period that the '

unit was removed from service for economic I

or similar reasons but was available for operation.

l 6 Net Electrical Energy (MWH). 596,586 4,310,653 94,537,210 l l The gross electrical output of the unit

{

l. measured at the output terminals of the

]

turbine-generator minus the normal station service loads during the gross hours of the reporting period, expressed in mega-watt hours. Negative quantities should not be used.

1

e . , .

'?

UNIT N -

DOCKET NO. 50446 - ' +-

UNIT NAME Davis-Besse #1 ,

DATE October 2,1998 COMPLETED BY E. C. Matranga -

REPORTING PERIOD: Seplamber.1998 TELEPHONE (419) 32f-8369 NO. =DATE TY_PE .- DURATION REASON (1) METHOD OF ' CAUSE/ CORRECTIVE ACTIONS . ,

F: FORCED - (HOURS) - SHUTTING .

S: SCHEDULED DOWN (2) - COMMENTS 9/24/98 F 41.3 A 2s The Reactor was manually tnpped after failure of a Main Feedwater Control Valve Solenod Valve during testing caused the Control Valve to begin to close (LER 98-010).

The solenoid valve was replaced prior to plant startup.

i i

SUMMARY

Reactor power was maintained at approximately 100% full power for the majority of the month. On September 20,1998, at 0305 hours0.00353 days <br />0.0847 hours <br />5.042989e-4 weeks <br />1.160525e-4 months <br />, reactor power was reduced to approximately 92%, to perform turbine valve testing. After the completion of the testing power was increased to 100%. ,

Reactor power of 100% was achieved at 0414 hours0.00479 days <br />0.115 hours <br />6.845238e-4 weeks <br />1.57527e-4 months <br /> on September 20,1998. On September 24,1998, the reactor was manually tripped from

- 100% full power at 2203 hours0.0255 days <br />0.612 hours <br />0.00364 weeks <br />8.382415e-4 months <br /> when a Main Feedwater Control Valve began to close during testing of the Steam and Feedwater Rupture Control System  ;

' (SFRCS). After a solenoid valve for the Main Feedwater Control Valve was repaired, the plant startup was cci n.enced. The reactor was taken cnbcal at 0557 hours0.00645 days <br />0.155 hours <br />9.209656e-4 weeks <br />2.119385e-4 months <br /> on September 26,1998. The Main Generator was synchronized to the grid at 1517 hours0.0176 days <br />0.421 hours <br />0.00251 weeks <br />5.772185e-4 months <br /> on September 26, and 100% full power i was achieved at 2354 hours0.0272 days <br />0.654 hours <br />0.00389 weeks <br />8.95697e-4 months <br /> on September 27,1998. i i

(1) Reason: (2) Method:  !

A-Equipment Failure (Explain) 1-Manual  !

B-Maintenance orTest 2-ManualTrio/ Scram f

. C-Refueling 3-Automabc Trip / Scram '

D-Regulatory Restrichon 4-Continuabon E-Operator Training & License Examin 5-Other (Explam) .!

F-Administrative .

G-Of rat;0nal Error (Explain) .

H-Other (Explain) i

-- --- . - . _ =_ _ - - _-- _ - __ - - ____ . - _ _ - ____ - __-_- --_ ___-- ____-__- __d

_