ML19276E668
| ML19276E668 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah, Midland  |
| Issue date: | 01/30/1979 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| References | |
| NUDOCS 7903200151 | |
| Download: ML19276E668 (1) | |
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TELEPHONE REPORT 2
s' FACH.ITY:
Sequovah 1 and 2 50-327 & 50-328 DOCKET f:
D A". :
1-10-79 Tm:
3:30 LIC. OCC. f:
W ECT:
CDR - Relay Tachometer Pailures on Diesel Generators s
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15.:2'?! ION 0? Ormumg; The Dynalco Type RT 2429 relay tachemeters purchased
'about 1971 have faifed on one Unit 1 and two Unit 2 diesel generators.
The zener diodes in the power supply have shown evidence of overheating prior to failure.
Dvnalco renlaced tvne RT 2429 with type SDC 4000 about three years ago.
Potential eeneric problem for relays purchased hrior to 1976.
Improper regulation in tachometer would disable diesef start motor on start function Part 21 potential dependent on contract"~ spec and service conditions 55(e) report due 3-1-79.
Potential appliegtions to Watts Bar being investigated.
V. Potapovs, RIV informed. RII to send RIV a copy of 'IVA 55(e) report upon receipt.
~ g,' g cc:
M. Thomas B. Coahran 8
g 790320016\\