View source for PNO-V-87-043, on 870605,discovered Through Wall Crack in Both 8R Cylinder Head & Piston Liner of Diesel Generator B.Cause Under Review.Piston Liner Replaced.Preparations Made to Install Spare Cylinder Head

{{Adams
| number = ML20215H638
| issue date = 06/08/1987
| title = PNO-V-87-043:on 870605,discovered Through Wall Crack in Both 8R Cylinder Head & Piston Liner of Diesel Generator B.Cause Under Review.Piston Liner Replaced.Preparations Made to Install Spare Cylinder Head
| author name = Wagner W, Zimmerman R
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION V)
| addressee name = 
| addressee affiliation = 
| docket = 05000530
| license number = 
| contact person = 
| document report number = PNO-V-87-043, PNO-V-87-43, NUDOCS 8706240167
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:g/                    l PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-V-87-43           Date: 06/08/87 This preliminary notification constitutes EARLY notice of POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by Region V staff on this date.
FACILITY: Arizona Nuclear Power Project                     Emergency Classification              r Palo Verde Unit 3                               Notification of Unusual Event Docket No. 50-530                               Alert Site Area Emergency General Emergency
_X__Not Applicable

==SUBJECT:==
REBUILT DIESEL GENERATOR TEST FAILURE.
On June 5,1987, the "B" Diesel Generator failed to start during its second post maintenance test run since a connecting rod failure in December, 1986. Operators in the area reported hearing a popping sound from the engine after receipt of the start signal.
Licensee investigation identified a through wall crack in both the 8R cylinder head and piston liner. The cylinder head was the original; however, the piston liner was replaced following the December, 1986 failure. Cause of the damage is under review by the licensee and the diesel supplier, Cooper Energy Services. The piston liner has been replaced and preparations are being made to install a spare cylinder head. The diesel had run successfully unloaded for 15 minutes several days earlier. The resident inspector is monitoring the licensee's investigation into the cause of the engine failure.
This information is current as of 10:15 AM (MST) June 8, 1987.
CONTACT:   W. Wagner                                 R. Zimmerman (415) 943-3731                             (602)386-5250/5271 DISTRIBUTION H St.                MNBB      Phillips      E/W     Willste       Air Rights       Mail:
Chairman Zech         ED0        NRR          IE       NMSS                         ADfi:DMB Comm. Roberts         PA                      OIA      RES                   D0T:Trans Only Comm. Asselstine      MPA                     AE0D Comm. Bernthal        ELD Comm. Carr            Regions:
SECY                             INPO       NSAC ACRS                             Licensee:                                                        j CA                               (Reactor Licensees)              REGION V: FORM 211 PDR                              Resident Inspector               (Revised 3/14/83) l l
j B706240167 B70608                                                                           j k$-V h -043         PDR                                                   ,             D\   ,
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