NLS2003043, Corrected May 2002 & November 2002 Monthly Operating Report for Cooper Nuclear Station

Corrected May 2002 & November 2002 Monthly Operating Report for Cooper Nuclear Station

ML031480515
Person / Time
Site:	Cooper
Issue date:	05/19/2003
From:	Hutton J Nebraska Public Power District (NPPD)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NLS2003043
Download: ML031480515 (4)

Text

Nebraska Public Power District Always there when you need us NLS2003043 May 19, 2003 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001

Subject:

Corrected Monthly Operating Report Data for May 2002 and November 2002, Cooper Nuclear Station, Docket No. 50-298, DPR-46 The purpose of this letter is to submit corrected information for the May 2002 and November 2002 Monthly Operating Reports. Attached are revised Appendix B's, Unit Shutdown Report, for May 2002 and November 2002 correcting unit shutdown data.

Should you have any comments or require additional information regarding this report, please contact Paul Fleming at (402) 825-2774.

Sincerely, ames . Hutton plant Manager

/cb Enclosure cc: NRC Regional Administrator W. J. Fehrman NRC Senior Resident Inspector W. D. Shanks ANI Library C. C. Warren J. M. Cline B. Lewis A. L. Dostal G. W. Griffith J. W. Dutton D. T. McNeil R. L. Gumm INPO Records Center Records COOPERNUCLEARSTATION , _ 9)

P.O. Box 98 / Bro wnville, NE 683210098 Telephone: (402) 825-3811 / Fax: (402) 825-5211 ww.nppd.com

APPENDIX B UNIT SHUTDOWNS DOCKET NO. 050-0298 UNIT NAME Cooper Nuclear Station DATE 6/15/2002 COMPLETED BY Rodrick Wilson TELEPIIONE (402) 825-5135 REPORT MONTI] May 2002 Type Method Of Shutting CAUSE/CORRECTIVE ACTIONS No. Date F: FORCED Duration (lours) Reason (I) Down (2) COMMENTS S: SCIIEDULED 02-01 05/10/02 S SCIIEDULED 36.4 A 5 Generator taken omine during drywell entry for fan coil unit repairs. Rx remained critical l 02.02 05/14/02 F FORCED 167.1 A I Failure of DEII system required plant shutdown for repairs I

SUMMARY

On 5/10/02, CNS reduced power and took the generator offline to perform an online drywell entry to repair a fan coil unit. During this period, the Rx remained critical.

The generator was brought back online on 5/12/02 and power ascension began.

On 5/14/02, arcing in the B' phase of the potential transformer required a rapid drop in Rx power to again take the generator ofine.

During the recovery from this, the DEH system failed and resulted in a manual Rx shutdown.

(I) Reason:

A - Equipment Failure (Explain)

- Maintenance or Test C - Refueling D -Regulatory Restriction E - Operator Training/License Examination F -Administrative G - Operational Error (Explain) 11- Other (Explain)

(2) Method:

I - Manual 2 - Manual Trip/Scram 3 - Automatic Trip/Scram 4 - Continuation 5 - Other (Explain) 3/24/2003 3:26 PM

4 APPENDIX B UNIT SHUTDOWNS DOCKET NO. 050-0298 UNIT NAME Cooper NuIclear Station DATE 12/15/2002 COMPLETED BY Rodrick Wilson TELEPHONE (402) 825-5135 REPORT MONTH November 2002 Type D Hsethod Of Shutting CAUSE/CORRECTIVE ACTIONS No. D)ate F: FORCED Duration (Hours) Reason (I) Down Reactor (2) COMMENTS S: SCIIEDULED I 02-03 1109/02 S SCIIEDULED 14.6 B 5 Rx remained critical while work on switchyard disconnect was performed

SUMMARY

On 11/09/02, CNS reduced power and took the generator offline to repair a hot disconnect in the switchyard.

The Rx remained critical during the maintenance activities.

(1) Reason:

A -Equipment Failure (Explain)

B- Maintenance or Test C -Refueling D -Regulatory Restriction E - Operator Training/License Examination F -Administrative G - Operational Error (Explain) 11- Other (Explain)

(2) Method:

I - lanual 2 - Manual Trip/Scram 3 - Automatic Trip/Scram 4 - Continuation 5 - Other (Explain) 3/18/2003 12:54 PM

I ATTACHMENT 3 LIST OF REGULATORY COMMITMENTS Correspondence Number: NLS2003043 The following table identifies those actions committed to by Nebraska Public Power District (NPPD) in this document. Any other actions discussed in the submittal represent intended or planned actions by NPPD. They are described for information only and are not regulatory commitments. Please notify the NL&S Manager at Cooper Nuclear Station of any questions regarding this document or any associated regulatory commitments.

COMMITTED DATE COMMITMENT OR OUTAGE None I

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