ML20085M199
| ML20085M199 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/25/1974 |
| From: | Eric Thomas TENNESSEE VALLEY AUTHORITY |
| To: | Oleary J US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20085M206 | List: |
| References | |
| AO-BFAO-744W, NUDOCS 8311080112 | |
| Download: ML20085M199 (2) | |
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TENNESSEE VALLEY AUTI-lOAITY I~7n, 'r7 '7 y
CHATTANOOGA, TENNESSEE f.
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i a t, January 25, 1974 yktyd[
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.,MfW r% nrA Mr. John F. O' Leary, Director I
Directorate of Licensing Office of Regulation U.S. Ato::lic Energy Co= mission
~ Wrishington, DC 20545
Dear Mr. O' Leary:
TEIIITESSEE VALLEY AUTHCRITY - BROWS FERRY ITUCLEAR PLANT iUIT 1 -
DOC:GT 170. 50-259 - FACILITY OPERATIM LICEliSE DPR ABliORMAL OCCURREliCE REPORT BFAO-744W The enclosed report is to provide details concerning start syste:: 1 failure on standby diesel engine which occurred on Browns Ferry IIuelcar Plant unit 1 on Jcnuary 16, 1974, and is submitted in accordance with Appendix A to Reguintory Guide 1.16, Revision 1, October 1973.
Very truly yours, 7
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TEICIESSEE VALLEY AUTHORITY l'
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,.,. Th_
Jirector of Power Production Ng
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"U Enclosure
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Mr. ITorman C. Moseley,= Director Region II Regulatory Operations Office, USAEC 230 Peachtree Street, liki.
Suite 818 Atlanta, Georgia 30303 8311000112'740125 COEy 3F;ST REGIO ( >
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ABNORMAL OCCURRENCE REPORT r
Report No.:
BFAO-744W Report Date: January 25, 1974 Occurrence Date: January 16, 1974 Facility:
Browns Ferry Euclear Plant unit 1 Identification of Occurrence Start system failure on standby diesel engine.
Conditions Prior to Occurrence Reactor was at 50-percent power.
Description of Occurrence On January 16, 1974, during scheduled surveillance testing of the diesel generator, diesel engine B failed to start with the -left bank of starters; however, it did start satisfactorily with the right bank of starters.
Analysis of Occurrence Each diesel engine contains two co=pletely independent air-starting syste=s,-
either of which is capable of starting the engine. When the:left bank of starters did not start the engine in the required time, the right bank of starters was energized automatically and started the engine. Failure of the left-bank starters
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threatened the starting capability of the diesel generator but did not render it-inoperable. The left-bank. starters failed to develop enough torque-to: start the engine..
Corrective Action The lower starter of the left bank was removed from the engine. IA replacement;
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starter was installed. The engine started satisfactorily using the replacement..
starter. This assembly of the failed starter. revealed rust from air supply piping c
i and possible lack of adequate lubrication'from the air.line lubricator. The air w
line lubricator was adjusted to provide. necessary lubrication to the starters,.
and all' other diesel generator air line lubricators ' vere inspected for proper :
operation.. Frequency of ' inspection of the diesel starting air' systems will be increased from annual to s eiannual.
i Failure Data r
.L-Starter data: -Ingersoll-Rand, size 150_'BMP,JModel 289RH-49 1.
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