ML072850051
| ML072850051 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 04/03/2006 |
| From: | Tamburro P Exelon Corp |
| To: | Ouaou A Exelon Corp, Office of Nuclear Reactor Regulation |
| SECY RAS | |
| References | |
| 50-219-LR, AmerGen-Intervenor-42, RAS 14359 | |
| Download: ML072850051 (2) | |
Text
Citizens Exhibits 42
-R1+5 143,67 From:
Tamb.
Sent:
Mond2 To:
Ouaou Cc:
Ray, H-
Subject:
Surfac Action Required: None Recommendation: None D~~U~9
.Ž)Offi cdbf Jrro, Peter iy, April 03, 2006 3:24 PM
, Ahmed lowie; Quintenz, Tom e Are of the Drywell in the sand bed DOCKETED IISNRC October 1,2007 (10:45am)
OFFICE OF SECRETARY RULEMAKINGS AND Ahmed ADJUDICATIONS STAFF
- 1) Total surface area of the Drywell Vessel that was (prior to 1992) in contact with sand in the sandbed.
701.5 square feet
- 2) Total surface area of the Drywell Vessel that was (prior to 1992) in contact with sand in the sand bed and is accessable by UT from inside the Drywell Vessel 115.6 Square feet
- 3) Total Surface area of the Drywell Vessel that will be inspected by UT 3.9 square feet 7Te Mp I a-te =. 5 Ff-)1
From:
Tamburro, Peter <Peter.Tamburro@exeloncorp.com>
Sent:
Wednesday, June 14, 2006 9:57 AM To:
Ouaou, Ahmed <u999ao2@ucm.com>
Cc:
Ray, Howie <uOOlfhr@ucm.com>; Quintenz, Tom <u777teq@ucm.com>
Subject:
average Thickness of thinnest Sanebed area in sandbed - 1996 Ahmed -
Calculation C-10302-187-5320-024 and the respective NDE Data sheets provide the following information related to the worst Drywell Vessel sandbed location for corrosion (located in Bay 13). The worst corrosion was located over a 15" by 43' inch area (15" axial and 43" circumferential). This area included 7 pits (very local - less than 2" in diameter) that were less than 0.736". The thinnest of these was 0.618". Calculation C-10302-187-5320-024 develops a thicknesses profile of this area (starts on page 25) and concludes that this area is on average 0.778" thick