PNO-IV-98-016, on 980413,operators at River Bend Station Initiated Normal Reactor Shutdown.Plant Shutdown Deemed Necessary After Operators Identified Main Generator Hydrogen Seal Oil Leak at Main Generator Casing

PNO-IV-98-016:on 980413,operators at River Bend Station Initiated Normal Reactor Shutdown.Plant Shutdown Deemed Necessary After Operators Identified Main Generator Hydrogen Seal Oil Leak at Main Generator Casing

ML20216H157
Person / Time
Site:	River Bend
Issue date:	04/14/1998
From:	Collins E, Replogle G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:
References
PNO-IV-98-016, PNO-IV-98-16, NUDOCS 9804210072
Download: ML20216H157 (1)

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April 14,1998 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-IV-98-016 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or j evaluation, and is basically all that is known by Region IV staff in Arlington, Texas on this i date.

l Facility Licensee Emeraency Classification

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Entergy Operations, Inc. Notification of Unusual Event River Bend 1 Alert St Francisville, Louisiana Site Area Emergency Dockets: 50-458 General Emergency X Not Applicable l

Subject:

PLANT SHUTDOWN GREATER THAN 72 HOURS On April 13, at 8:25 p.m. CDT, operators at River Bend Station initiated a normal reactor shutdown. At 11:29 p.m. the reactor shutdown was completed by inserting a manual scram at 30 percent reactor. power as prescribed by the normal shutdown procedure At that time, the plant entered Operational Mode 3, Hot Shutdown. As of 11 a.m. on April 14, the unit was at approximately 250 degrees F and was proceeding to cold shutdown.

The plant shutdown was deemed necessary after operators identified a main generator hydrogen seal oil leak at the main generator casing. During and after the shutdown, the licensee monitored for hydrogen accumulation in the turbine building, but none was identified. The licensee had previously planned a facility shutdown later this month to repair a main generator hydrogen leak and a main turbine steam leak. The licensee plans to complete repairs to the generator and turbine and then return the plant to power. The shutdown is expected to exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The date to retum the unit to oower has not yet been established.

The state of Louisiana will be informed.

Region IV received notification of this occurrence by phone from the Senior Resident inspector at 8:30 p.m. on April 13. Region IV has informed the EDO, NRR, and PA.

This information has been discussed with the licensee and is current as of 11 a.m. on April 14,1998.

Contact:

E. E. Collins G. D. Replogie (817)860-8291 (504)635-3193 9804210072 980414 PDR I&E  !

PNO-IV-98-016 as; PDR '

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