PNO-II-85-082, Westinghouse Turbine Reults Indicate Resonance Vibration in High Pressure End of Turbine.Caused by Mod to Governor Valves.Governor Valves Will Be Replaced

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PNO-II-85-082:Westinghouse Turbine Reults Indicate Resonance Vibration in High Pressure End of Turbine.Caused by Mod to Governor Valves.Governor Valves Will Be Replaced
ML20134M306
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 08/22/1985
From: Carroll R, Panciera V
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
References
PNO-II-85-082, PNO-II-85-82, NUDOCS 8509040075
Download: ML20134M306 (1)


r August 22, 1985 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-85-82 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verifi-cation or evaluation, and is basically all that is known by the Region 11 staff on this date.

FACILITY: Florida Power Corporation Licensee Emergency Classification:

Crystal River Unit 3 Notification of Unusual Event Docket No. 50-302 Alert Crystal River, Florida Site Area Emergency General Emergency X Not Applicable

SUBJECT:

HIGH PRESSURE TURBINE VIBRATION The licensee reports that evaluation of turbine test results by Westinghouse indicates a resonance vibration in the high pressure end of the turbine.

The vibration is attributed to the newly modified governor valves that were installed during the recent outage and has been linked to the socket-weld failures on the 1 1/2-inch steam chest drain drain line. This drain line ruptured twice following initial startup of the facility on August 18 following an extended outage.

The plant is expected to be shut down for approximately five days while the governor valve replacement is being performed.

Area media interest has occurred, and both the licensee and the NRC have responded to inquiries.

The State of Florida has been informed.

This information is current as of 12 noon on August 22, 1985.

Contact:

R. Carroll, 242-5543 V. Panciera, 242-5525 DISTRIBUTION: .D MNBBY[Phillipsbg4 Willstef'\MAIL:

H. Street 05k E/W Chairman Palladino TD F NRR TF NMSS %DMTUMB Comm. Roberts PA OIA RES DOT: Trans Only Comm. Asselstine MPA AE0D Applicable State Com. Bernthal ELD gb Comm. Zech Air Rights INP07-SECY SP NSAC Regions: b M, N E '

Licensee: 3.'15 (ReactorLicensees)

ApplicableResidentSite9..,13 8509040075 850822

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