View source for PNO-III-87-007, on 870107,diesel Generator 1A Declared Inoperable.Caused by Potentially Defective Piston Connecting Rod.Spare Rod Taken from Braidwood & Installation & Testing Completion Expected by 870110

{{Adams
| number = ML20207P289
| issue date = 01/09/1987
| title = PNO-III-87-007:on 870107,diesel Generator 1A Declared Inoperable.Caused by Potentially Defective Piston Connecting Rod.Spare Rod Taken from Braidwood & Installation & Testing Completion Expected by 870110
| author name = Forney W, Warnick W
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION III)
| addressee name = 
| addressee affiliation = 
| docket = 05000454
| license number = 
| contact person = 
| document report number = PNO-III-87-007, PNO-III-87-7, NUDOCS 8701150356
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:PRELIMINARYNOTIFICATIONOFEVENTORUNUSUALOCCbRRENCE--PNO-III-87-07DateJanuary 9, 1987 l
This preliminary notification constitutes EARLY notice of events of POSSIBLE safety cr public interest significance. The information is as initially received without v;rification or evaluation, and is basically all that is known by the Region III staff on this date.
Facility: Commonwealth Edison Company                  Licensee Emergency Classification:                           ,
Byron Unit 1                                     Notification of an Unusual Event                      )
Byron, IL 61010                                  Alert Site Area Emergency Docket No. 50-454                                General Emergency X Not Applicable

==Subject:==
DIESEL GENERATOR CONNECTING R0D REPLACEMENT                                                                 !
As a result of a piston connecting rod failure at Palo Verde 3 (reference PN0-V-86-93 and                            4 93A), the licensee was advised by the manufacturer, Cooper-Bessemer, that a connecting rod                           j in the 1A diesel generator at Byron Unit 1 was potentially defective. (Themanufacturerhad                           j d:tarmined that the rod failure at Palo Verde 3 was attributable to fatigue cracking in an area that had been built up by iron plating and remachined. Similar buildup and remachining had occurred on the Byron 1A diesel generator).
Tha licensee declared the 1A diesel generator inoperable on January 7, 1987. A spare connecting rod was obtained from Braidwood. The licensee expects to complete the rod installation and testing of the diesel generator by early January 10, 1987.                 (The unit has remained in operation under a 72-hour Limiting Condition of Operation that would rquire unit shutdown at 3:50 p.m., January 10, 1987, if the diesel generator is not returned to service.)
The Vendor Branch, Office of Inspection and Enforcement, has been involved in coordinating the generic aspects of the connecting rod problem. The resident inspectors are reviewing tha rod replacement activities.
The State of Illinois will be informed.
This information is current as of 11 a.m., January 9, 1987.
CONTACT:
Y W. Forney hh    W. Wa- ick FTS 388-5590              FTS 31  "575 DISTRIBUTION:
H. St.                      E00        NRR           E/W          Willste      Mail: ADM:DMB Chairman Zech               PA                       IE           NMSS                 D0T:Trans only Comm. Roberts               ELD                      OIA          RES I Comm. Asselstine                                      AE0D                      NRC Ops Ctr /2/dd r  Comm. Bernthal l Comm. Carr                   SP //.g          Regional Offices i ACRS l SECY                         INP0 /[fS7               NSAC/.l!#7 CA                          RIII Resident Office PDR                         Licensee:      /2lOI             (Corp. Office - Reactor Lic. Only)
                   $11@5687o109                                                      Pegion III              O    (
PNO-III-g7.OO7 PDR                                                Rev. November 1986              ,f f
                                                    ._.         .            .              --             ,   .-}}

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