ML042300151

July 2004 Monthly Operating Report for Davis-Besse Nuclear Power Station Unit 1

ML042300151
Person / Time
Site:	Davis Besse
Issue date:	08/12/2004
From:	Allen B FirstEnergy Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
308200
Download: ML042300151 (6)

Text

Davis-Besse Nuclear Power Station ArsfineW5501 F;s.g North State Route 2 Oak Harbor, Ohio 43449-9760 Docket No. 50-346 License No. NPF-3 Serial No. 3082 August 12, 2004 Document Control Desk U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 Monthly Operating Report, July 2004 Davis-Besse Nuclear Power Station Unit I Ladies and Gentlemen:

Enclosed is a copy of the Monthly Operating Report for the Davis-Besse Nuclear Power Station for the month of July 2004.

Please direct questions to Brian D. Boles, Manager- Plant Engineering, at (419) 321-7302.

Very truly yours, Barry S. Allen Plant Manager Davis-Besse Nuclear Power Station AWB/s Enclosures cc: DB-1 NRC/NRR Senior Project Manager DB-1 Senior Resident Inspector NRC Region III Administrator

Docket No. 50-346 License No. NPF-3 Serial No. 3082 Distribution bcc: B. S. Allen, DB-2101 A. W. Bless, DB 3065 B. D. Boles, DB-1056 D. R. Converse, DB-3310 J. J. Grabnar, DB-3210 L. J. Kovach, DB-1056 A. R. Miller, DB-1056 M. E. O'Reilly, GO-18 R. Runo, GO-14 T. Schneider, A-GO-17 G. C. Wilson, DB-2103 D. R. Wuokko, DB-3065 F. Heizer, PUCO B. Lewis, Utility Data Institute, Inc.

R. Prijatel, Fuel Accounting, GO-6 R. Schomaker, Framatome American Nuclear Insurers CNRB Administrator INPO Records Center Ohio EPA - DERR Compliance Utility Radiological Safety Board

Docket No. 50-346 License No. NPF-3 Serial No. 3082 Page I of I COMMITMENT LIST The following list identifies those actions committed to by the Davis-Besse Nuclear Power Station in this document. Any other actions discussed in the submittal represent intended or planned actions by Davis-Besse. They are described only as information and are not regulatory commitments. Please notify the Manager - Regulatory Affairs (419-321-8450) at Davis-Besse of any questions regarding this document or associated regulatory commitments.

Commitments Due Date None N/A

Docket No. 50-346 License No. NPF-3 Serial No. 3082 Monthly Operating Report for July 2004 (two pages to follow)

OPERATING DATA REPORT DOCKET NO. 50-0346 UNIT NAME Davis-Besse Unit 1 DATE 08/01/04 COMPLETED BY A. R. Miller TELEPHONE 419-321-7824 REPORTING PERIOD July, 2004 YEAR TO MONTH DATE 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). 882 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 3,214.3 150,848.6 The total number of hours during the gross hours of the reporting period that the reactor was critical.

4 Number of Hours the Generator Was On Line. 744.0 3,062.1 148,099.2 (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 hours of the reporting period that the unit was removed from service for economic or similar reasons but was available for operation.

6 Net Electrical Energy (MWH). 656,635 2,616,783 121,748,581 The gross electrical output of the unit 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.

UNIT SHUTDOWNS DOCKET NO. 50.346 UNIT NAME Davis-Besse #1 DATE 8/01/04 COMPLETED BY A.R. Miller REPORTING PERIOD: July, 2004 TELEPHONE (419) 321-7824 NO. DATE TYPE DURATION REASON (1) METHOD OF CAUSE/CORRECTIVE ACTIONS F: FORCED (HOURS) SHUTTING

&: SCHEDULED DOWN (2) COMMENTS No Unit Shutdowns

SUMMARY

The reactor was at 100% power for the majority of the month. On July 15, the unit downpowered to approximately 92% when an ICS memory module failed.

The unit returned to 100% power on July 16. On July 27, the unit downpowered to approximately 98% when the primary computer server failed to provide updated data to the plant computer. Later that same day, the plant was restored to 100% power after the computer server was rebooted and computer operation was restored.

(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 Exam 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H-Other (Explain)