ML110190647
| ML110190647 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 11/07/2010 |
| From: | NRC Region 1 |
| To: | |
| References | |
| FOIA/PA-2011-0045, FOIA/PA-2011-0066 | |
| Download: ML110190647 (4) | |
Text
Failure Mechanism of 21 Main Transformer and Extent of Condition CR: IP2-2010-6801 CA: 15 Summary:
Outside of Scope
,*Atl18:39 on 11/-7l/l10,"with !the plant at approximately
- 100%
ona-2lTVMain 'Transformeriwhich-resultedjn, a Unit :power, afault o-6ccurred°n
.Aler wasideclared, in acc rdance.With-EAL,8.2.:3;,,d 2 autbmatic-trip,.,An ue to:the subsequent 21 Main Trarsfotmer explosion.
Outside of Scope t4 ~)
-~
L I The'transformer' experienceda rapid increase in pressure due
'B'.phase high voltage bushing. Thisý sudden to the-failure-of the.
increase caused the tank to fail.
,Combustible gases, from arcing, built up in theitransformer leaked. from-the tank~breach After several rmore6 aszthe insulating oil minutes, enough oxygen
,combined .,with the hot gasescausing.a secondary.,explosion!
forphotos' of damage to bushings and ruptured See Attachment 3 transformer tank.
Outside of Scope
- , 1,~,A
-I-awaWtum ruft Froaftn ap-__IL_
RUMA 2ýkl I QQ15:1 K
Outside of Scope (23 Pages)
Outside of Scope (42 Pages)