ML20210J935

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Informs That NMP Is Changing Completion Date for Replacement of Valves Having O Rings with Installed Life Greater than Eight Years.Replacement to Be Completed by 991031, During Hydrogen Monitoring Sys Maintenance Outage
ML20210J935
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 07/29/1999
From: Rich Smith
NIAGARA MOHAWK POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NMP1L-1452, NUDOCS 9908050145
Download: ML20210J935 (1)


Text

_

hN 1

July 29, 1999 '

NMPIL 1452 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 RE: Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 1

Subject:

February 8,1999, Special Report (NMP1L 1400)

Gentlemen: 4 l

In Niagara Mohawk Power Corporation's (NMPC's) Special Report of February 8,1999 (NMPIL 1400), NMPC indicated that the remaining hydrogen monitoring system check valves having 'O' rings with an installed life greater than eight years would be replaced by July 29, 1999. The purpose of this letter is to inform you that NMPC is changing the completion date for the replacement of the valves.

NMPC had scheduled the replacement of the check valves to be completed following the recent Refueling Outage 15 in accordance w th Nine Mile Point Unit l's integrated maintenance sebadule. However, as a result of the unplanned extension of the refueling outage, NMPC :d reschchied the replacement of the check valves. The work will be completed by Obtober 31,1999, during a hydrogen monitoring system maintenance outage.

There is no safety significance associated with the change in schedule. The subject check valves have functioned properly and have satisfactorily passed surveillance testing since the submission of NMPC's February 8,1999, Special Report.

Very truly yours, l

9900050145 990729

/ $

PDR ADOCK 05000220 P PDR Robert G. Smith i Plant Manager - NMP1 D l RGSIKLIJsc

]

xc: Mr. H. J. Miller, NRC Regional Administrator Mr. S. S. Bajwa, Section Chief PD-I, Section 1, NRR Mr. G. K. Hunegs, NRC Senior Resident Inspector y Mr. D. S. Hood, Senior Project Manager, NRR "v I Records Management 7

050029 Nine Mile Point Nuclear Station, RO. Box 63, Lycoming, New York 13093-0063

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