ML072850052

2006/10/10-Oyster Creek September 2007 Evidentiary Hearing - Intervenors Exhibit 43, Email from J. Hufnagel, External Inspections of DW in Sandbed Region

ML072850052
Person / Time
Site:	Oyster Creek
Issue date:	10/10/2006
From:	Hufnagel J Exelon Corp
To:	O'Rourke J - No Known Affiliation, Office of Nuclear Reactor Regulation
SECY RAS
References
50-219-LR, AmerGen-Intervenor-43, RAS 14360
Download: ML072850052 (1)

Text

Citizens Exhibits 43"g'/ A /'-/(,o From: Sent: To:

Subject:

Hufnagel Jr, John G <john.hufnage1@exe1oncorp.com; Tuesday, October 10, 2006 8:10 AM O'Rourke, John F. <t925jfo@ucm.com>

RE: External Inspections of DW in Sandbed Region ILL NUC~jal2LZniWu fo~inm'0 by-Ap4pllica-;ý---Qt~reo~

RIv~ffM on Thanks for the clear update, John.----Original Message---

From: O'Rourke, John F.Sent: Tuesday, October 10, 2006 8:08 AM To: Gallagher, Michael P; Polaski, Frederick W; Warfel Sr, Donald B; Hurnagel Jr, John G; Ouaou, Ahmed DOCKETED IJSNRC, October 1, 2007 (10:45am)OFFICE OF SECRETARY RULEMAKINGS AND ADJUDICATIONS STAFF

Subject:

External Inspections of DW in Sandbed Region In response to a question by Mike last night, I talked to Pete Tamburro this morning about the external UTs.Currently, Pete's spec has not been revised and is still specifying 16 locations to be examined.

There are 19 locations that were less than 0.736 inch thickness; however, 3 were in bays that were not originally planned to be accessed and inspected.

One of our recommendations could be to inspect these other 3.Mike mentioned a figure of 125 inspections done externally in the sandbed region. Pete could not confirm the number without going to the data sheets and counting up the number of inspections.

The 19 subset were the locations under 0.736. The remainder were above 0.736. All locations inspected are located on the data sheets;therefore, re-inspections in the locations above 0.736 can be done with reasonable assurance that the readings would be close to the areas originally inspected.

Pete noted that not all the areas were prepared by grinding.

If the surface was reasonably flat such that a good reading could be taken, prep's were not done. Locating such areas would be done by the horizontal and vertical measurements on the data sheets.Pete said he sent Ahmed a copy of the calculation (the '24' calc) that has the data attached.Any questions, let me know. John phz~e~~C/f-0~ ~Y a 56'cy-og-