PNO-III-87-103, on 870727,licensee Reduced Power to Approx 2% to Repair Feedwater Check Valve Which Was Leaking. Unusual Event Under Licensee Emergency Plan Was Declared,Due to Required Shutdown
| ML20212E225 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 07/31/1987 |
| From: | Norelius C, Patricia Pelke NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| References | |
| PNO-III-87-103, NUDOCS 9711030108 | |
| Download: ML20212E225 (1) | |
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PRELIMINARY NOTIFICATIOj! 0F EVENT OR UNUSUAL OCCURRENCE--PHO-Ill 3 Date July 31, 1987 AAVuct &W--
This preliminary notification constitutes EARL 4 notice of events of POSSIBLE safety or public interest significance. The information is as initially received without O verification or evaluatioc, and is basically all that is known by the Region !!!
jstaff on this date.
Facility: Detroit Edison Licensee Emergency Classification:
Fenni 2 X Notification of an Unusual Event Newport MI 48166 Alert Site Area Emergency Docket No. 50-341 General Emergency Not Applicable
Subject:
FEEDWATgCHECKVALVELEAKAGF On July 27, 1987, the licensee reduceo power to approximately two perunt to repair a feedwater check.nlyg which was leaking. Repair efforts, using a metallic sealant (Furmanite),
continued throudtf t,er,weeJ. y}d tpe licensee began to increase power on July 30.
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The leakage resumed, however, and the licensee commenced a reactor shutdown from three percent pcwer because the leakage (4.2 liters per minute) exceeded Technical Specification limits.
(The check valve, which is locatd in the reactor building steam tunnel, is part of the reactorcoolantsystempressureboundary.)
During the shutdown, the reactor scramed as a result of feedwater flow variations while reactor power and pressure were being reduced.
Because of the required shutdown.the licensee declared an Unusual Event under its emergency plan. Appropriate governmental notifications were made.
C The licensee is reviewing possible repair options for the leaking valve. The resident
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inspectors will monitor the repair activities. An Operational Safety Team member was on
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site and observed the licensee's actions during the event. The plant is expected to remain shut down for greater than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
The State of Michigan will be notified.
There has been local news media interest in the shutdown.
-)[g The Headquarters Duty Officer was notified of the shutdown at 2:45 a.m. (EDT). This inf)rmationiscurrentasof12 noon (EDT), July 31, 1987.
i CONTACT:
P. Pelke C. Norelius 1
FTS 388-5560 FTS 388-5717 DISTRIBUTION:
H. St.
EDO NRR E/W Willste Mail: ADM:DMB Chairman Zech PA IE NMSS DOT:Trans only Com Roberts ELD OIA RES Com.= Bernthal AE00 NRC Ops Ctr Com. Carr ACRS SP Regional Offices SECY CA INP0 NSAC CPOR-~9 R!ll Resident Office
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Licensee:
(Corp. Office - Reactor Lic. Only) 9711030108 870731 Region !!!
m (J)d fNO-I 87-103 PDR C/R Distribution:
Chm, Cmes W. GC, CA, MAS. Historian, SECY, Records.
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