ML072850064
| ML072850064 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/20/2007 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| SECY RAS | |
| References | |
| 50-219-LR, AmerGen-Intervenor-51, RAS 14368 | |
| Download: ML072850064 (1) | |
Text
Citizens Exhibits 51 ns/r87 DOCKETED
( ISNRC October 1, 2007 (10:45am)
OFFICE OF SECRETARY RULEMAKINGS AND ADJUDICATIONS STAFF Co'Ni~
The:upper _sketch shows the ultrasonic technique used adurg 199.21 ad illustrates a typical (but exaggerated) dishedg.irea produced wheiI surfac prep was pe-foiMed.in 1992. The:sound travel is shlo,,
with -the arro-Vs. The..'air-gap" was assumied to be minitmal.
The loWe sketch sh *histhe rewvr teclogy Whch. all6.,vs§ u. to io6w use a.
techniqu oaUed "T.ho fo.Eoh~o'. This tecl.nique was seiected due to the ice, beib-tg, ~oated, fhe: te*nicue su btracts the coatdingthiekfles*: and displays only thbe.:actw....ltiikgn.ps b)using the nul!tiplel ech~oes gener a,*e.I.
th&2uid...ikund ttrip.) The eeho.-t6-echb tedcmiqtte also -suibtrats lie."aih -gap's to display onlyi the :a.tial. metal thickness. The bold(red) arrow. shoms ihe dimensibn that is being rtecorded.
The chart shows the mock-up: results,, comparing several various diameters and tle resultinig diffoerenees, relating to concavity. Thc fi pcbtor, interview selected the 3" radius sample as the one to most represent a. typical dish area, OFI
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