ML021430409
| ML021430409 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 05/15/2002 |
| From: | Bergendahl H FirstEnergy Nuclear Operating Co |
| To: | Dyer J NRC/RGN-III |
| References | |
| 1-1274, FOIA/PA-2003-0018 | |
| Download: ML021430409 (23) | |
Text
FENOC Davis-Besse Nuclear Power Station 5501 North State Route 2 Oak Harbor, Ohio 43449-9760 FirstEnergy Nuclear Operating Company Howard W Bergendahl 419-321-8588 Vice President-Nuclear Fax: 419-321-8337 Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 May 15, 2002 Mr. J. E. Dyer, Administrator United States Nuclear Regulatory Commission Region III 801 Warrenville Road Lisle, IL 60532-4351
Subject:
Supplemental Information in Response to NRC Question Number 24 on the Preliminary Probable Cause Summary Report dated March 22, 2002 Ladies and Gentlemen:
On April 30, 2002, Davis-Besse Nuclear Power Station, Unit 1 (DBNPS) submitted to the NRC letter Serial Number 1-1272, "Responses to NRC Questions on the Preliminary Probable Cause Summary Report dated March 22, 2002" regarding the Reactor Pressure Vessel (RPV) head degradation. The purpose of this letter is to provide the NRC with supplemental information on crack profiles for significant cracks on nozzles 2 and 3, as discussed in the response to question number 24 of the aforementioned letter.
Cracks that extend above the root of the J-Groove weld were profiled. Crack profiles are provided for two cracks on nozzle 3 and seven cracks on nozzle 2. Elevation values are referenced from the Control Rod Drive nozzle flange face.
Some of the crack profiles show what appears to be a separate inside diameter (ID) connected crack above the main crack. According to the UT-Level III Examiner, it is possible that this is actually connected to the main crack, however, the data shows separation between the cracks. The separation could be caused by loss of contact due to weld shrinkage and may account for what appears to be two separate cracks when in fact they may be the same crack.
12,ICj 2
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Page 2 of 2 In addition, a revised ultrasonic examination data sheet and top-down profile are enclosed for nozzle 2, which includes the recently added flaw 13 that was discussed with the NRC during the May 7, 2002 Root Cause Analysis Meeting. Flaw 13 was not identified in the Root Cause Analysis Report, which was submitted to the NRC on April 18, 2002 by letter Serial Number 1-1270, therefore, the enclosed revision to Table 2 and Figure 9 are provided to update that report. A Condition Report has been generated to evaluate the omission of flaw 13 from the Root Cause Analysis Report.
If you have any questions or require additional information, please contact Mr. David H.
Lockwood, Manager-Regulatory Affairs, at (419) 321-8450.
Very truly yours, Enclosure and Attachment cc:
USNRC Document Control Desk D.V. Pickett, DB-1 NRC/NRR Project Manager C.S. Thomas, DB-1 Senior Resident Inspector Utility Radiological Safety Board
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 1 of 20 Nozzle 3 Flaw #1 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.6 in.
30.68 in.
27.8 in.
29.1 in.
30.75 in.
Meas. Location Elevation Depth from Tube OD UT Depth from ID A
26.60 0.429 0.22 B
26.70 0.579 0.07 C
26.80 0.619 0.03 D
26.90 0.649 0
E 27.00 0.649 0
F 27.10 0.649 0
G 27.20 0.649 0
H 27.30 0.649 0
I 27.40 0.649 0
J 27.50 0.649 0
K 27.60 0.649 0
L 27.70 0.649 0
M 27.80 0.649 0
N 27.90 0.649 0
O 28.00 0.649 0
P 28.10 0.649 0
Q 28.20 0.649 0
R 28.30 0.649 0
S 28.40 0.649 0
T 28.50 0.649 0
U 28.60 0.649 0
V 28.70 0.649 0
W 28.80 0.649 0
X 28.90 0.649 0
Y 29.00 0.649 0
Z 29.10 0.649 0
AA 29.20 0.649 0
AB 29.30 0.649 0
AC 29.40 0.649 0
AD 29.50 0.649 0
AE 29.60 0.649 0
AF 29.70
' 0.649 0
AG 29.80 0.649 0
AH 29.90 0.649 0
Al 30.00 0.649 0
AJ 30.10 0.649 0
AK 30.20 0.649 0
AL 30.30 0.649 0
AM 30.40 0.649 0
AN 30.50 0.649 0
AO 30.60 0.609 0.04 AP 30.70 0.429 0.22
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 2 of 20 Crack Profile for Nozzle 3, Flaw #1 a
0 E
0 L_
I-.
- 0.
0 0.6 0.5 0.4 0.3 0.2 0.1 0
(N) 0 0
0
()
CN 0 0 0
0 0
0 0
0 0
0 (t )
0 (N
(
(N
(
M (0
(N (N
0(
MN c5 o
cO C
Crack Elevation All dimensions are inches
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 3 of 20 Nozzle 3 Flaw #4 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.07 in.
29.89 in.
26.9 in.
28.4 in.
30.75 in.
OD Connected Portion ID Connected Portion Meas. Location Elevation Depth from Tube OD UT Depth from ID UT Depth from ID A
26.07 0.08 B
26.17 0.14 C
26.27 0.13 D
26.37 0.09 E
26.47 0.049 0.6 0.05 F
26.57 0.069 0.58 0.11 G
26.67 0.309 0.34 0.04 H
26.77 0.389 0.26 0.02 1
26.87 0.389 0.26 J
26.97 0.499 0.15 K
27.07 0.559 0.09 L
27.17 0.629 0.02 M
27.27 0.649 0
N 27.37 0.649 0
O 27.47 0.649 0
P 27.57 0.649 0
Q 27.67 0.649 0
R 27.77 0.649 0
S 27.87 0.649 0
T 27.97 0.649 0
U 28.07 0.649 0
V 28.17 0.649 0
W 28.27 0.649 0
X 28.37 0.649 0
Y 28.47 0.649 0
Z 28.57 0.649 0
AA 28.67 0.649 0
AB 28.77 0.649 0
AC 28.87 0.649 0
AD 28.97 0.649 0
AE 29.07 0.649 0
AF 29.17 0.649 0
AG 29.27 0.649 0
AH 29.37 0.649 0
Al 29.47 0.549 0.1 AJ 29.57 0.529 0.12 AK 29.67 0.509 0.14 AL 29.77 0.439 0.21 AM 29.87 0.249 0.4
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 4 of 20 Crack Profile for Nozzle 3, Flaw #4 0.6 0
0 0.1 E
E 0.5 0.2 2
"0.4 0.3 CL 0.3-S0.2 0
Cu 0.1 0.6 L
0C,4 (D
0C I4 0,
CN (0
C)
IT 04 (N
CD L6 (6
(6 p(N (Ný 06 M"
(N (N
(N (N
C)'
All dimensions are inches CCrack Elevation
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 5 of 20 Nozzle Flaw #1 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 2
0.649 in.
Elevation 27.25 in.
29.51 in.
27.8 in.
29.1 in.
30.78 in.
Meas. Location Elevation Depth from Tube OD UT Depth from ID A
27.25 0.009 0.64 B
27.35 0.059 0.59 C
27.45 0.079 0.57 D
27.55 0.239 0.41 E
27.65 0.329 0.32 F
27.75 0.319 0.33 G
27.85 0.419 0.23 H
27.95 0.449 0.2 1
28.05 0.449 0.2 J
28.15 0.449 0.2 K
28.25 0.459 0.19 L
28.35 0.449 0.2 M
28.45 0.459 0.19 N
28.55 0.509 0.14 o
28.65 0.479 0.17 P
28.75 0.529 0.12 Q
28.85 0.529 0.12 R
28.95 0.549 0.1 S
29.05 0.509 0.14 T
29.15 0.439 0.21 U
29.25 0.459 0.19 V
29.35 0.369 0.28 W
29.45 0.279 0.37 X
29.55 0.249 0.4 Y
29.65 0.079 0.57 Z
29.75 0
0.649
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 6 of 20 Crack Profile for Nozzle 2, Flaw #1 0
E 0
CD) 0.6 0.5 0.4 0.3 0.2 0.1 0
O0 )
U-U, I
, 0 03 0*
0 I.0 0
0 0*
I".
0 03 0,.
00
~
CD Mt N-M?
((N 100 W rýt NCD M?
(N,..
(,...
r-...-
d co co N (o m
Nm m
6 6
C?
C?)
C-N4 C4 C4 04 0,4 N4 N4 N4 N4 N4 N4 M3 M
M M
M Crack Elevation All dimensions are inches
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 7 of 20 Nozzle 2 Flaw #2 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.59 in.
30.37 in.
27.4 in.
29 in.
30.78 in.
Meas. Location Elevation Depth from Tube OD UT Depth from ID A
26.59 0.009 0.64 B
26.69 0.629 0.02 C
26.79 0.649 0
D 26.89 0.649 0
E 26.99 0.649 0
F 27.09 0.649 0
G 27.19 0.649 0
H 27.29 0.649 0
1 27.39 0.649 0
J 27.49 0.649 0
K 27.59 0.649 0
L 27.69 0.649 0
M 27.79 0.649 0
N 27.89 0.649 0
O 27.99 0.649 0
P 28.09 0.649 0
Q 28.19 0.649 0
R 28.29 0.649 0
S 28.39 0.649 0
T 28.49 0.649 0
U 28.59 0.649 0
V 28.69 0.649 0
W 28.79 0.649 0
X 28.89 0.649 0
Y 28.99 0.649 0
Z 29.09 0.649 0
AA 29.19 0.649 0
AB 29.29 0.649 0
AC 29.39 0.649 0
AD 29.49 0.649 0
AE 29.59 0.649 0
AF 29.69 0.649 0
AG 29.79 0.649 0
AH 29.89 0.649 0
Al 29.99 0.529 0.12 AJ 30.09 0.449 0.2 AK 30.19 0.239 0.41 AL 30.29 0.009 0.64
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 8 of 20 Crack Profile for Nozzle 2, Flaw #2 0 0 E
0 CL 0..
,,0,,
0, 0.6 0.5 0.4 0.3 0.2 0.1 0
All dimensions are inches (0
C
" (0)
(M
")
M"N U-0W)
C CD 0M) c6 5 6 r,-
r--,,
r-...
00 00 050 5 (Y
0')
o) o' o
o (4
(N (N
(N (N
N N
(N (4
(N.
(N (N
(N CO Cr CO Cvi Crack Elevation
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 9 of 20 Nozzle 2 Flaw #4 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.45 in.
29.39 in.
27.2 in.
28.95 in.
30.78 in.
OD Connected Portion ID Connected Portion Meas. Location Elevation Depth from Tube OD UT Depth from ID UT Depth from ID A
26.45 0.07 B
26.55 0.17 C
26.65 0.23 D
26.75 0.23 E
26.85 0.039 0.61 0.18 F
26.95 0.039 0.61 G
27.05 0.049 0.60 H
27.15 0.039 0.61 1
27.25 0.269 0.38 J
27.35 0.479 0.17 K
27.45 0.529 0.12 L
27.55 0.519 0.13 M
27.65 0.569 0.08 N
27.75 0.649 0.00 O
27.85 0.649 0.00 P
27.95 0.649 0.00 Q
28.05 0.649 0.00 R
28.15 0.649 0.00 S
28.25 0.649 0.00 T
28.35 0.649 0.00 U
28.45 0.649 0.00 V
28.55 0.649 0.00 W
28.65 0.609 0.04 X
28.75 0.599 0.05 Y
28.85 0.589 0.06 Z
28.95 0.559 0.09 AA 29.05 0.549 0.10 AB 29.15 0.499 0.15 AC 29.25 0.389 0.26 AD 29.35 0.019 0.63
5cn Cfl 0
Crack Depth from OD n
o5 zZ 00 C
00 00 00 C)
C)
(D C
26.05 26.45 26.85 27.25 0
N 27.65 0
0 x 28.05 m
< 28.45 0
N N
0 28.85 N
29.25
'I" 29.65 30.05 30.45 0C0 0C0 0C0 CD Crack Depth From ID
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 11 of 20 Nozzle 2 Flaw #6 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.8 in.
29.36 in.
27.4 in.
28.75 in.
30.78 in.
Meas. Location Elevation Depth from Tube OD UT Depth from ID A
26.80 0.359 0.29 B
26.90 0.459 0.19 C
27.00 0.489 0.16 D
27.10 0.509 0.14 E
27.20 0.589 0.06 F
27.30 0.649 0
G 27.40 0.649 0
H 27.50 0.649 0
I 27.60 0.649 0
J 27.70 0.649 0
K 27.80 0.649 0
L 27.90 0.649 0
M 28.00 0.649 0
N 28.10 0.649 0
O 28.20 0.649 0
P 28.30 0.649 0
Q 28.40 0.649 0
R 28.50 0.649 0
S 28.60 0.649 0
T 28.70 0.649 0
U 28.80 0.649 0
V 28.90 0.649 0
W 29.00 0.649 0
X 29.10 0.629 0.02 Y
29.20 0.579 0.07 Z
29.30 0.499 0.15
Crack Depth from OD G
N) 0 C) C
ýO
-p, Or a) 0 0
CD CD Z
i (CnD t-z(
t'J C
26.40 26.70 27.00 27.30 27.60 27.90 28.20 28.50 28.80 29.10 29.40 29.70 30.00 30.30 30.60 30.90 31.20 0
"-I 0
0 0
MI z
0 "N
N
-D irn*
%)
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 13 of 20 Nozzle 2 Flaw #8 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.35 in.
30.16 in.
27.45 in.
28.9 in.
30.78 in.
Meas. Location Elevation Depth from Tube OD UT Depth from ID A
26.35 0.059 0.59 B
26.45 0.099 0.55 C
26.55 0.109 0.54 D
26.65 0.059 0.59 E
26.75 0.069 0.58 F
26.85 0.079 0.57 G
26.95 0.159 0.49 H
27.05 0.149 0.5 1
27.15 0.109 0.54 J
27.25 0.099 0.55 K
27.35 0.209 0.44 L
27.45 0.449 0.2 M
27.55 0.469 0.18 N
27.65 0.499 0.15 0
27.75 0.499 0.15 P
27.85 0.559 0.09 Q
27.95 0.579 0.07 R
28.05 0.619 0.03 S
28.15 0.639 0.01 T
28.25 0.649 0
U 28.35 0.649 0
V 28.45 0.649 0
W 28.55 0.649 0
X 28.65 0.649 0
Y 28.75 0.649 0
Z 28.85 0.649 0
AA 28.95 0.649 0
AB 29.05 0.649 0
AC 29.15 0.649 0
AD 29.25 0.649 0
AE 29.35 0.649 0
AF 29.45 0.649 0
AG 29.55 0.649 0
AH 29.65 0.619 0.03 Al 29.75 0.619 0.03 AJ 29.85 0.559 0.09 AK 29.95 0.539 0.11 AL 30.05 0.399 0.25 AM 30.15 0.159 0.49
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 14 of 20 Crack Profile for Nozzle 2, Flaw #8 E
0 16 L_
4
- 0.
L.)
0.6 0.5 0.4 0.3 0.2 0.1 0-L All dimensions are inches LO LO LO LO LO LO LO tO LO LO LO LO LO tO LO LO LO M 0 LO O0 I-r'-
0 CO (D,0. )
N LO O0 T-r N
- .o (0
(0, ("
P-.
r.-ý r,--
oo' 00o 00 005 (D C: ) 5 CraN N
N N
N NEn Crack Elevation I
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 15 of 20 Nozzle 2 Flaw #10 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.8 in.
30.35 in.
27.4 in.
29 in.
30.78 in.
OD Connected Portion ID Connected Portion Meas. Location Elevation Depth from Tube OD UT Depth from ID UT Depth from ID A
26.80 0.01 B
26.90 0.04 C
27.00 0.11 D
27.10 0.076 E
27.20 0.12 F
27.30 0.04 G
27.40 H
27.50 0.459 0.19 1
27.60 0.549 0.1 J
27.70 0.589 0.06 K
27.80 0.629 0.02 L
27.90 0.629 0.02 M
28.00 0.649 0
N 28.10 0.649 0
0 28.20 0.649 0
P 28.30 0.649 0
Q 28.40 0.649 0
R 28.50 0.649 0
S 28.60 0.649 0
T 28.70 0.649 0
U 28.80 0.649 0
V 28.90 0.649 0
W 29.00 0.649 0
X 29.10 0.649 0
Y 29.20 0.649 0
Z 29.30 0.649 0
AA 29.40 0.649 0
AB 29.50 0.649 0
AC 29.60 0.649 0
AD 29.70 0.629 0.02 AE 29.80 0.619 0.03 AF 29.90 0.599 0.05 AG 30.00 0.459 0.19 AH 30.10 0.459 0.19 Al 30.20 0.439 0.21 AJ 30.30 0.419 0.23
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 16 of 20 Crack Profile for Nozzle 2, Flaw #10 a
0 E
0 C
0.
0.6 0.5 0.4 0.3 0.2 0.1 0
All dimensions are inches U
a 0.1 E
0 0.2 U
0.3 0.4 0.5 0.6 CD CD CD CD CD CD CD CD CD CD CD (D CD CD (D (O
M N
LO O
I --
CD CO CO CD N
LO CO Crack Elevation I
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 17 of 20 Nozzle 2 Flaw #13 Wall Tk.
Crack Start Crack End Upper Weld Edge Lower Weld Edge End of Nozzle 0.649 in.
Elevation 26.6 in.
29.81 in.
27.4 in.
28.7 in.
30.78 in.
Meas. Location Elevation Depth from Tube OD UT Depth from ID A
26.60 0.599 0.05 B
26.70 0.649 0.00 C
26.80 0.649 0.00 D
26.90 0.649 0.00 E
27.00 0.649 0.00 F
27.10 0.649 0.00 G
27.20 0.649 0.00 H
27.30 0.579 0.07 1
27.40 0.389 0.26 J
27.50 0.409 0.24 K
27.60 0.409 0.24 L
27.70 0.379 0.27 M
27.80 0.389 0.26 N
27.90 0.419 0.23 o
28.00 0.369 0.28 P
28.10 0.429 0.22 Q
28.20 0.489 0.16 R
28.30 0.469 0.18 S
28.40 0.449 0.20 T
28.50 0.499 0.15 U
28.60 0.549 0.10 V
28.70 0.539 0.11 W
28.80 0.649 0.00 X
28.90 0.649 0.00 Y
29.00 0.649 0.00 Z
29.10 0.649 0.00 AA 29.20 0.599 0.05 AB 29.30 0.619 0.03 AC 29.40 0.429 0.22 AD 29.50 0.359 0.29 AE 29.60 0.239 0.41 AF 29.70 0.039 0.61 AG 29.80 0.009 0.64 OD Connected Portion
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 18 of 20 Crack Profile for Nozzle 2, Flaw #13 a 0 E
0 L
M.
0.6 -
0.5 0.4 0.3 0.2 0.1 0 1 0
0.1 E
0 0.2 0.3 0.4 0.5 0.6
- 0) 0D 0
0 0
0 0
0 0
0 0
0 N
(D 0
'T WO N
,0 0
T WO N
(C0 C,,..
C0 I-I-
I"-.
CO CO a) 0")
0")
0 0
04 04 04 04 0
04 00 64
- 04)
(T; 6O N
N N
N N
N N
N\\
N N
- 00)
CIO Crack Elevation All dimensions are inches I
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 19 of 20 Table 2. Nozzle 2 NDE Examination Results CRDM Nozzle Ultrasonic Examination Data Sheet Customer:
FENOC Plant:
Davis Besse jUnit:
N/A Nozzle:
2 Procedure:
54-11-100-08 CA: FRA-02-002, DB-02-012 Nozzle Dimensions: (in.)
ID: 2.765 OD: 4.06 Thicknes 0.649 Downhill Side of Nozzle (deg.):
315 End of Noz. (in.):
30.78 Probe Serial No.'s: Ch 1 2078-01002-OL Ch 6 21GB-01002-45L Axial Scan Start: -5, 16.1 Stop: 360, 30.77 Setup:
1 Ch 2 21GF-01004-30L Ch 7 21GC-01001-55L Files:
T2061 09.12.19 Ch 3 21GA-01004-45L Ch 8 22CD-01001-65L Circ. Scan Start: 0, 18.95 Stop: 360, 29.52 Setup:
2 Ch 4 2623-01002-60S Ch 9 2624-01005-60S Files:
T2061 07.25.10 Ch5 2623-01002-60S Ch10 2624-01005-60S Flaw Surface Depth End Point I End Point 2 Axial Adjusted Ci rc. Extent Flaw Flaw Flaw Flaw Flaw Weld Location No.
(ID/OD) to Min Min Max Max Total Min Max Total Length Angle TWD Aspect Drientatior
( Flaw Flaw Tip (in.)
(deg.)
(in.)
(deg.)
(in.)
(deg.)
(deg.)
(in.)
(in.)
(deg.)
(in.)
Ratio Min Max 1
OD 0.236 27.46 291.0 29.51 275.0 2.05 24.0 40.0
-0.57 2.13 165 0.41 0.19 AXIAL In Weld Region 2
OD TW 26.59 262.0 30.37 240.0 3.78 53.0 75.0
-0.78 3.86 168 0.65 0.17 AXIAL In Weld Region 3
0.65 1
i 4
OD TW 26.69 148.0 29.39 141.0 2.70 167.0 174.0
-0.25 2.71 175 0.65 0.24 AXIAL In Weld Region 5
OD 0.33 27.87 130.0 28.7 127.0 0.83 185.0 188.0
-0.11 0.84 173 0.32 0.38 AXIAL In Weld Region 6
OD TW 26.8 67 29.36 78 2.56 248.0 237.0 0.39 2.59 9
0.65 0.25 AXIAL In Weld Region 7
11 8
OD TW 26.35 32 30.16 61 3.81 283.0 254.0 1.03 3.95 15 0.65 0.16 AXIAL In Weld Rego 9I 10 OD TW 27.39 7
30.35 26 2.96 308.0 289.0 0.67 3.04 13 0.65 0.21 AXIAL In Weld Region 11 OD 0.344 27.9 314 27.75 347 0.15 361.0 328.0 1.17 1.18 83 0.31 0.26 CIRC.
0.1 i
0.1 12 OD 0.572 29.02 320 29.6 327 0.58 5.0 12.0 0.25 0.63 23 0.08 0.12 AXIAL In Weld Region 13 OD TW 26.6 259.0 29.81 258.1 3.21 101.9 101.0
-0.03 3.21 179 0.65 0.20 AXIAL In Weld Region 14 15 Revision 2 514/02 16 17 Data Loc.
315 345 15 45 75 105 135 165 195 225 255 285 315 Degrees WELD Noz. Loc.
0 30 60 90 120 150 180 210 240 270 300 330 360 Degrees Noz. End 30.78 30.78 30.78 30.78 30.78 30.78 30.78 30.78 30.78 30.78 30.78 30.78 30.78 Inches PROFILE MAX.
29.17 29.09 29.02 28.84 28.61 28.49 28.46 28.49 28.76 28.92 29.04 29.14 29.17 Inches MIN.
28.06 27.79 27.36 27.39 27.31 27.16 27.16 27.24 27.36 27.39 27.84 27.89 28.06 Inches Notes:
Adjusted Circ. Extent is relative to downhill side of nozzle:clockwise looking down. TWD is Through-Wall Dimension Comments:
Data was encoded with positive Theta going counterclockwise. Adjusted circ. positions have corrected the position to read clockwise looking down.
Flaws #3, 7,and 9 were identified as axial flaws using the circ. blade probe but are not confirmed with the rotating UT. Therefore, flaws #3, 7, and 9 are not relevant.
Analyzed by:
K.C.Gebetsberger Date:
3/5/2002 Analyzed by:
M.G. Hacker Date:
3/5/2002
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Enclosure Page 20 of 20 Figure 9. Nozzle 2 Crack Locations and Sizing Nozzle2ProfIle Reision 2l Top-Down Data Degrees 0
90 180 270 21.0 21.5-22.0 22.5 -------------------------------------------------------------------
23.0 -
23.5 24.0 24.5
= 25.0 i
L 25.5 o 26.0 S 26.5 27.5 29.0 2 7.5 3 1.0 -
-- 1--2--3--
4--
5--
6 --
7--- -10--
11 --
12--
13 14-15 16 -- Noz. End ]
Docket Number 50-346 License Number NPF-3 Serial Number 1-1274 Attachment Page 1 of 1 COMMITMENT LIST The following list identifies those actions committed to by the Davis-Besse Nuclear Power Station (DBNPS) in this document. Any other actions discussed in the submittal represent intended or planned actions by the DBNPS. They are described only for information and are not regulatory commitments. Please notify the Manager - Regulatory Affairs (419-321-8450) at the DBNPS of any questions regarding this document or associated regulatory commitments.
COMMITMENTS DUE DATE None