ML070780237
| ML070780237 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 03/14/2007 |
| From: | Feintuch K NRC/NRR/ADRO/DORL/LPLIII-1 |
| To: | Browning T Nuclear Management Co |
| K. Feintuch, LPL3-1 | |
| References | |
| TAC MD4630 | |
| Download: ML070780237 (2) | |
Text
March 14, 2007 PI~
o~f 2-.
To:
Tony Browning,
301-415-1222 This explanation accompanies a sketch faxed from Karl Feintuch (USNRC PM) to Tony Browning (DAEC) to obtain crack data as part on an independent assessment of UT data (TAC MD4630)
The "picture" of a "flaw profile" shows the length and depth of the flaw around the circumference of the pipe.
There are many ways to show a flaw profile. The one sketched is one way (although what is desired is a scale showing the length and depth of the flaw). Other ways to show a flaw profile would be, starting at one end of the flaw, to show the depth of a cross-section and then incrementally go along the length of the flaw providing the thru-wall depth at each location. For example, for slices taken at 0.02" increments, the crack could be characterized as:
0.00" 0.0% TW 0.02" 0.5% TW 0.04" 0.6% TW 0.06" 0.6% TW and so on until the end of the flaw.
We recognize that the crack might be irregular relative to the direction /Kthe slices. Please kF..
advise us if your measurements make it impractical to create the requested profile or if you have 3/q, an alternate way of characterizing the profile of the crack..(42 Karl Feintuch Project Manager
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