ML073020191
| ML073020191 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 03/22/2007 |
| From: | Bullen D, Latanision R, Taylor D Exponent Failure Analysis Associates, Exponent |
| To: | Jay Collins NRC/NRR/ADES/DCI |
| References | |
| FOIA/PA-2007-0240 | |
| Download: ML073020191 (13) | |
Text
-<-
'1
IN600 nozzle Wastage Cavity 51-5013376-00]
A[BWX>T 1140-025-02-24 (Fki. 7.2.1.1 )1]
Stainless cladding A2ASB3 Nozzle 3 Crack 1 Approximate boundary of material removed by boring tool during nozzle removal.
[EVUT 1140-025-02-24 (Fil. 7.2.4.1)]
(Fig. 7.2.4.6)
[BUt.XT 1140-025-02-24 (Fig. 7.2.3.1)]
(Frnmatorrne 51 -501 8376-00]
Not to scale
ALM 04-Feb-03 WD:14. 6.
10.61WA 9d' 0.01 inch 0,20 inch
[11y1
!1 I.1 I3Y AF lIlJ I
Alloy 600 PWSCC Growth Rates Adjusted to Davis-Besse Cycle-1 3 Operating Temperature: 605 F (318 C) 10 Test Results Davis-Besse Samples (B. Alexandreanu et al., Argonne National Laboratory, 2005)
- 112T CT specimens (Nozzle 3 Alloy 600)
+ 1/4T CT specimens (Nozzle 3 Alloy 600)
Actual D-B Nozzle-3 growth rates are up to 4 times faster than EPRI/MRP Disposition Curve
>~0.32 <------------------
a)
.1 Fit to 112T Specimen Data from D
Curve D-B Nozzle-3 Alloy 600 (EPRIIIVRP >95%)
0 Alloy-600 Disposition Curve 0.0
- F"-knue (EPRIIMRP 75%)
(9 0.01 0.0 Ci)lvyv
!~AI.
ai.P fals iust heim'
~F P 'P
- D4i o
[.
I mjeI 0.0001...
5 10 15 20 25 30 Stress Intensity Factor, K (ksi in"/2)