ML073650129

(PA-LR) Modified Question

ML073650129
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	11/26/2007
From:	Rowley J NRC/NRR/ADRO/DLR
To:	David Mannai, Metell H Entergy Nuclear Operations
References
TAC MD2297
Download: ML073650129 (2)

Text

Page 1 of 1 Jonathan Rowley - modified question From: Jonathan Rowley To: 7429078@cvcpaging.com; dmannai@entergy.com; hmetell@entergy.com Date: 11/26/2007 2:05 PM

Subject:

modified question Dave/Mike On Wednesday (11/21) 1 sent you the draft of a potential question the staff has related to Audit Question #387.

Here is an advance copy of the final version of the question. Formal transmittal of this question to follow.

Your response to audit question # 387 in your November 14, 2007, letter states that "In most cases the maximum component stress difference with time matched the maximum stress intensity calculated by ANSYS. This shows that shearingstresses are negligible for the thermal transient at that location and the maximum component stress difference is the maximum stress intensity."

Please identify the exceptions to the quoted statements. In addition, please justify the exceptions, based on quantitative evaluations, that the shearingstresses are negligible and the maximum component stress difference is the maximum stress intensity for the branch nozzle blend radius (nozzle corner) locations with geometrical discontinuitiesfor the applicable thermal transients. Your response should cover the shearingstress differences at the 0-180 degree axis and the 90-270 degree axis to the pipe run axis.

Jonathan Rowley, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission (301) 415-4053 file://C:\temp\GW }00002.HTM 12/28/2007

1!6.-V6aip\GW)60006.TMP Page 1('1 i

c :\... . \G W } 0000....... .. . . .. . . . . ... . . . . .. .... .... . . .. .. . ... . .P.. ........ . . . .. . . ... . . ... . . .. . .e...

Mail Envelope Properties (474B18FE.5E1 : 12 : 35182)

Subject:

modified question Creation Date 11/26/2007 2:05:34 PM From: Jonathan Rowley Created By: JGR(cnrc.gov Recipients Action Date & Time cvcpaging.com Transferred 11/26/2007 2:06:05 PM 7429078 (7429078 (acvcagainvz.com) entergy.com Transferred 11/26/2007 2:06:05 PM dmannai (dmannai(Rentergy.com) hmetell (hrnetell(Fentergy.com)

Post Office Delivered Route cvcpaging.com entergy.com Files Size Date & Time MESSAGE 2008 11/26/2007 2:05:33 PM TEXT.htmr 3613 Options Auto Delete: No Expiration Date: None Notify Recipients: Yes Priority: Standard ReplyRequested: No Return Notification:

Send Notification when Opened Concealed

Subject:

No Security: Standard To Be Delivered: Immediate Status Tracking: Delivered & Opened