Probabilistic Structural Integrity Analysis of Boiling Water Reactor Pressure Vessel under Low Temperature Overpressure Event
Table 7
Fractions of CPI and CPF by flaw categories.
Flaw category
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 × 10−6
% of CPI
CPI
% of CPF
CPF
% of CPI
CPI
% of CPF
CPF
Flaw Category 1
Inner
0.08
1.10 × 10−10
0.03
3.90 × 10−11
0.20
8.26 × 10−10
0.08
3.08 × 10−10
Outer
0
0
0
0
0
0
0
0
Flaw Category 2
Inner
94.67
1.31 × 10−7
99.97
1.30 × 10−7
93.52
3.86 × 10−7
99.92
3.85 × 10−6
Outer
0
0
0
0
0
0
0
0
Flaw Category 3
Inner
0
0
0
0
0
0
0
0
Outer
5.25
7.25 × 10−9
0
0
6.28
2.59 × 10−8
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.
