ML070530366
| ML070530366 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 02/01/2007 |
| From: | Hamer M Entergy Corp |
| To: | Rowley J NRC/NRR/ADRO/DLR |
| References | |
| TAC MC2297 | |
| Download: ML070530366 (3) | |
Text
icharoEmch - VY Eval of Monticello Event
. a e 1 1 Richarc~Emch - VY Eval of Monticello Event Paae 1 From:
To:
Date:
Subject:
"Hamer, Mike" <mhamer@entergy.com>
"Jonathan Rowley" <JGR@nrc.gov>
Thu, Feb 1,2007 2:17 PM VY Eval of Monticello Event
- Jonathan, FYI - attached is VY Engineering's review of the recent event that occurred at Monticello. This review has been formally documented in a Condition Report (CR).
Please call me if you have any questions.
lFc7\\-tem-i)\\GW-IoO--O-O'f-.--rM--F:i-- -"'-
Paqe 1 IF~f6~ii~\\Gwboooo1.TMP Pacie Mail Envelope Properties (45C23CA8.FE4: 13 : 40932)
Subject:
Creation Date From:
Created By:
VY Eval of Monticello Event Thu, Feb 1, 2007 2:16 PM "Hamer, Mike" <mhamer@entergy.com>
mhamer@entergy.com Recipients nrc.gov TWGWPO03.HQGWDOO1 JGR (Jonathan Rowley)
Post Office TWGWPO03.HQGWDO01 Route nrc.gov Files Size Date & Time MESSAGE 225 Thursday, February TEXT.htm 2583 Monticello CV Servo Enclosure Failure Applicability to VY.pdf Mime.822 1
1, 2007 2:16 PM 37733 Options Expiration Date:
Priority:
ReplyRequested:
Return Notification:
Concealed
Subject:
Security:
None Standard No None No Standard Junk Mail Handling Evaluation Results Message is eligible for Junk Mail handling This message was not classified as Junk Mail Junk Mail settings when this message was delivered Junk Mail handling disabled by User Junk Mail handling disabled by Administrator Junk List is not enabled Junk Mail using personal address books is not enabled Block List is not enabled
Monticello CV Servo Enclosure Failure Applicability to VY There are 5 US Nuclear Power Plants with similar Turbine Control System Configuration (MHC - TCV Servo Enclosure). Monticello, Pilgrim, Vermont Yankee (VY), Nine Mile 1, Oyster Creek.
VY Turbine Control Engineer immediately sent to Monticello to assist in investigation and understand failure for applicability to Vermont Yankee. VY has also discussed its observations with Pilgrim.
" Although VY has a similar Servo Enclosure, it is physically located in a different location.
- VY Civil / Structural Engineers have investigated details of servo enclosure support structure.
" Investigation has determined that the VY structure is of a different and more robust design. VY structure supports the cabinet load. Monticello cabinet load is suspended from the structure.