PNO-II-87-015A, on 870305,two High Temp Bearing Trips Occurred.Caused by Failure of California Controls Eutectic Type Temp Sensors.No Damage,Unusual Wear or Excessive Temps Revealed.Diesel Generator 1-B Journal Bearing Refurbished: Difference between revisions

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#REDIRECT [[PNO-II-87-015, on 870305,unit out-of-svc Greater than 48 H. Caused by Damaged Journal Bearing in One Tdi Diesel Generator.Damaged Bearing Found During Routine Maint & Replaced]]
| number = ML20207T523
| issue date = 03/11/1987
| title = PNO-II-87-015A:on 870305,two High Temp Bearing Trips Occurred.Caused by Failure of California Controls Eutectic Type Temp Sensors.No Damage,Unusual Wear or Excessive Temps Revealed.Diesel Generator 1-B Journal Bearing Refurbished
| author name = Crlenjak J
| author affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
| addressee name =
| addressee affiliation =
| docket = 05000413
| license number =
| contact person =
| document report number = PNO-II-87-015A, PNO-II-87-15A, NUDOCS 8703240096
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION & AUDIT & I&E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:-.                                                                                                        .
March 11, 1987 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-87-15A 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 II staff on this date.
FACILITY: Duke Power Company                            Licensee Emergency. Classification:
Catawba Unit 1                                              Notification of Unusual Event Alert Docket No. 50-413 Rock Hill, South Carolina                                  Site Area Emergency General Emergency X Not Applicable
 
==SUBJECT:==
UPDATE ON SHUTDOWN DJE TO DAMAGED DIESEL GENERATOR BEARING This PN updates PN0-II-87-15, issued March 6, h M7 Tha licensee reports that inspection of the journal bearing on the 1-B diesel generator, which led to an unscheduled shutdown of Unit 1, revealed no damage, unusual wear, or indications of excessive temperatures.         The inspection was conducted by the licensee and th3 vendor, Transamerica Delaval. The bearing was refurbished anyway.
The cause of two high bearing temperature trips has been attributed to the failure of California Controls (CALCON) eutectic type temperature sensors in which solder, designed to melt at 228 degrees (F), melted prematurely due to the metallurgic composition of the solder.
The high bearing temperature trip function would be bypassed during emergency operation of the engine.
The diesel generator was successfully tested on March 9, and the Unit is being prepared for return to service.
Unit 2 was unaffected.
The State of South Carolina has been informed.
This PN is being issued for information purposes only.
 
==Contact:==
J. Crlenjak DISTRIBUTION:
H. Street              MNBB      Phillips    E/W      Willste                            MAIL:
Chairman Zech          EDF      NRR        IE        NMSS                                ADM:DMB Comm. Roberts          PA                    OIA      RES                                00T: Trans Only Comm. Asselstine        MPA                  AE0D                                        Applicable State Comm. Bernthal          ELD                          () ,-
Comm. Carr              Air Rights            INFO-- //
k'        M7 7 ,.h-(/' g / g SECY                        SP              NSAC                          1, ACRS                                      gyN7 ~
                                                        /
R                          Regions:                                                                              ,
j  j Licensee:      "D Z U                                                                          f    i (ReactorLicensees)
Applicable Resident Site h,2 e}                                                                      ,  ,
87J32g96870311'                                  ,
          !                PNO-II-87-015A Pr.R a_-_-______________-__n______ _ - . _ _ .
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