Probabilistic Structural Integrity Analysis of Boiling Water Reactor Pressure Vessel under Low Temperature Overpressure Event
Table 5
PFM analysis results of beltline region materials.
Material ID
32 EFPY
64 EFPY
Total CPI
Total CPF
Total CPI
Total CPF
1.38 × 10−7
1.30 × 10−7
4.13 × 10−7
3.85 × 10−7
% of CPI
CPI
% of CPF
CPF
% of CPI
CPI
% of CPF
CPF
Axial welds
W-1001-07
5.33
7.36 × 10−9
5.45
7.09 × 10−9
7.64
3.16 × 10−8
7.90
3.04 × 10−8
W-1001-08
45.37
6.26 × 10−8
44.65
5.80 × 10−8
38.38
1.59 × 10−7
37.13
1.43 × 10−7
W-1001-09
25.92
3.58 × 10−8
25.35
3.30 × 10−8
23.68
9.78 × 10−8
23.25
8.95 × 10−8
W-1001-10
15.82
2.18 × 10−8
16.78
2.18 × 10−8
17.01
7.03 × 10−8
18.22
7.01 × 10−8
W-1001-11
0
0
0
0
0.21
8.67 × 10−10
0.21
8.09 × 10−10
W-1001-12
7.53
1.04 × 10−8
7.75
1.01 × 10−8
12.97
5.36 × 10−8
13.23
5.09 × 10−8
Circumferential weld
W-1102-3
0.04
5.52 × 10−11
0.01
1.30 × 10−11
0.11
4.54 × 10−10
0.05
1.93 × 10−10
Plates
SC-03-S3
0
0
0
0
0
0
0
0
SC-03-S2
0
0
0
0
0
0
0
0
SC-03-S1
0
0
0
0
0
0
0
0
SC-04-S1
0
0
0
0
0
0
0
0
SC-04-S3
0
0
0
0
0
0
0
0
SC-04-S2
0
0
0
0
0
0
0
0
The conditional probabilities should be multiplied by 10−3/year (the occurrence frequency of LTOP transient) to determine the fracture and failure frequencies per year.
