PNO-III-87-095, on 870709,reduction in Power Occurred Due to Handswitch Failure on Cooling Tower Pump B Discharge Valve. on 870710,decreasing Oil Pressure in Primary Coolant Pump Noted.Possibly Caused by Pump Vibration Creating Oil Leak

PNO-III-87-095:on 870709,reduction in Power Occurred Due to Handswitch Failure on Cooling Tower Pump B Discharge Valve. on 870710,decreasing Oil Pressure in Primary Coolant Pump Noted.Possibly Caused by Pump Vibration Creating Oil Leak

ML20235N592
Person / Time
Site:	Palisades
Issue date:	07/10/1987
From:	Burgess B, Kazmar R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-87-095, PNO-III-87-95, NUDOCS 8707200144
Download: ML20235N592 (1)

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PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III--87-95 Date 7/10/87 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety j$b j 1

or public interest significance. The information is as initially received without '

verification or evaluation, and is basically all that is known by the Region III staff on this date.

i Facility: Consumers Power Company Licensee Emergency Classification.

Palisades Nuclear Power Plant Notification of an Unusual Event Covert, MI 49043 Alert Site Area Emergency Docket No. 50-255 General Emergency X Not Applicable

Subject:

OIL LEAK IN COOLANT PUM."

On the afternoon of July 9,1987, a reduction in power commenced due to a handswitch failure on the "B" cooling tower pump discharge valve. Subsequently at 1:00 a.m., July 10, 1987, l operators identified decreasing oil pressure in one of two primary coolant pumps. Operators further reduced reactor power from 75 percent to 14 percent, but the oil loss continued.

The unit was manually scrammed at 1:21 a.m. All systems functioned as designed except for two secondary plant problems. The unit remains in hot shutdown.

The oil leak was located on the discharge line of the AC backstop oil pump. The leakage may have been caused by pump vibration. The licensee is continuing its investigation. Repairs are being planned. The unit will remain shutdown for more than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

The secondary problems involved the failure of a main feed pump trip and *.hrottle valve (high pressure valve) to fully close and the failure of the recirc valve on the same feed pump to open.

Region III (Chicago) is monitoring the licensee's course of action.  !

The State of Michigan will be notified. I Region III first learned of this event about 1:00 a.m. (CDT), July 10, 1987. This information is current as of 1:00 p.m. (CDT), July 10, 1987 NW LL V l l CONTACT: R. Ka ar B. Burg j FTS G88-5540 FTS 388-5689 '

DISTRIBUTION:

H. St. EDO NRR E/W Willste Mail: ADM:DMB 5"32 met  !

Chairman Zech PA IE NMSS D0T:Trans only l Comm. Roberts ELD OIA RES Comm. Asselstine AEOD NRC Ops Ctr @o(a Comm. Bernthal Comm. Carr ACRS SP $Q Regional Offices i SECY INP0 4'-00 NSAC Ch 04 -

CA PDR RIII Reside4'0 Licensee: ~nt Offic$e(Corp. Office - Reactor Lic. Only)

Region III Rev. November 1986 j 8707200144 870710 l PDR jh $

} $<E FNO-1 I I-87-095 PDR - <

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