ML12053A098
| ML12053A098 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 09/14/2011 |
| From: | Ganesh Cheruvenki Division of Engineering |
| To: | Rajender Auluck, James Medoff Division of License Renewal |
| References | |
| FOIA/PA-2011-0357 | |
| Download: ML12053A098 (2) | |
Text
From:
Cheruvenki. Ganesh To:
Auluck. Raiender Medoff. James Cc:
Mitchell, Matthew; Khanna. Meena; Tsiriaotis. Alexander
Subject:
FW: North Anna--Unit 1 and 2--After the earthquake Date:
Wednesday, September 14, 2011 8:32:22 AM Importance:
High Raj and Jim, My mistake
-After discussions with Matt, I found out that it is my mistake to assume that the following items require further evaluation. Since these items are not affected by seismic event. no further evaluation is required by Matt's branch.
The components that are not affected by a seismic event are-Sections 4.3.2-RPV underclad cracking and 4.7.2-RC Pump Flywheel.
The other components listed in TLAA sections 4.3.1, 4.3.3, 4.3.4, and sections 4.7.1, 4.7.3 and 4.7.4 thru 4.7.6 may or may not require further evaluation. That decision needs to be made by branches that are responsible for evaluating these TLAA sections.
From: Cheruvenki, Ganesh Sent: Tuesday, September 13, 2011 12:54 PM To: Auluck, Rajender Cc: Medoff, James; Mitchell, Matthew; Khanna, Meena; Sheng, Simon
Subject:
North Anna--Unit 1 and 2--After the earthquake Importance: High
Further evaluation is needed for these components based on the new OBE and SSE design criteria. Meena Khanna's group will handle this evaluation.
Components-Metal Fatigue-Section of TLAA 4.3.1-ASME Ill Class 1 components 4.3.3-ANSI B31.1 PIPING 4.3.4-Environmentally assisted fatigue 4.7.1-Crane Load Cycle Limit 4.7.3-Leak before break 4.7.4-Spent fuel pool liner
4.7.5-Piping subsurface indications 4.7.6-Reactor coolant pump-Code Case N-481 Sections 4.3.2-RPV underclad cracking and 4.7.2-RC Pump Flywheel may be reviewed by Matt's group.
Ganesh 2501