PNO-I-97-068, on 971103,unplanned Shutdown Greater than 72 H Occurred.Oil Leaks Detected & Repaired.Third RCP Inspected & Engineers Found Low Seal Flow at Second Stage Pump Seal. Resident Inspectors Following Onsite Activities

PNO-I-97-068:on 971103,unplanned Shutdown Greater than 72 H Occurred.Oil Leaks Detected & Repaired.Third RCP Inspected & Engineers Found Low Seal Flow at Second Stage Pump Seal. Resident Inspectors Following Onsite Activities

ML20198P132
Person / Time
Site:	Three Mile Island
Issue date:	11/05/1997
From:	Schmidt W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
References
PNO-I-97-068, PNO-I-97-68, NUDOCS 9711060281
Download: ML20198P132 (2)

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-9 November 5,1997 g.

PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENHE PNO l-97 068 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by Region I staff (King of Prussia, Pennsylvania) on this date.

Facility: Licensee Emeroency Classification l Three Mile Island Notification of Unusual Event GPU Nuclear Corporation Alert Post Office Box 480 Site Area Emergency Middletown, PA 17057 0480 General Emergency Docket No.: 50 289 X Not Applicable License No.: DPR 50

SUBJECT:

UNPLANNED SHUTDOWN GREATER THAN 72 HOURS On November 3,1997, GPU Nuclear commenced a TMl Unit 1 shutdown in order to repair a smallleak in a half inch makeup system flow transmitter line associated with reactor coolant pump (RCP) sealinjection. The unit arrived at hot shutdown at 10:20 p.m. on November 3 and the leak (less than 0.3 gpm) was repaired and tested satisfactorily on November 4.

In addition to the makeup system leak, two RCPs had higher than normal oil leakage (!ess than 0.1 gpm) prior to the shutdown. The oilleaks were detected and repaired. A third RCP was inspected and engineers found low seal flow at the second stage pump seal.

The unit will remain in hot standby until the RCP seal problem is corrected, which may result in the unit being shutdown greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

The contents of this Preliminary Notification have been communicated to the Commonwealth of Pennsylvania.

The resident inspectors are following onsite activities. This information is correct as of 11:00 a.m., November 5,1997.

Contact:

Wayne Schmidt (717) 9481165 4

9y7 1 g 281 971105 PNO-1-97-068 PDR:

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