Environmental Engineering Reference
In-Depth Information
Table 6.4
Initial date for reliability with ageing effects taken into account
Equipment
Rate of
failure
(initial
value)
Selected
reliability
model
Data correction
l(10)
l(20)
l(30)
l(40)
Electric batteries
2.80·10
-6
Linear
Running-in
failures excluded
2.72·10
-6
4.30·10
-6
5.88·10
-6
7.46·10
-6
Flow rate sensors
2.40·10
-6
Weibull
Running-in
failures excluded
2.23·10
-6
4.92·10
-6
7.83·10
-6
1.09·10
-6
Level sensors
2.10·10
-6
Log-linear
-
2.10·10
-6
3.62·10
-6
6.26·10
-6
1.08·10
-5
Pressure sensors
1.40·10
-6
Weibull
-
1.33·10
-6
1.64·10
-6
1.86·10
-6
2.03·10
-6
380 V switches
(pumps) FF
3.10·10
-6
Weibull
-
3.03·10
-7
4.18·10
-7
5.05·10
-7
5.78·10
-7
380 V switches
(pumps) FD
8.40·10
-6
Log-linear
Running-in
failures excluded
6.45·10
-6
2.32·10
-5
8.35·10
-5
3.0·10
-6
6.6 kV switches
FD
4.80·10
-6
Weibull
-
5.54·10
-5
6.48·10
-5
7.10·10
-5
7.57·10
-5
Pump electric
motors 6.6 kV FR
1.90·10
-6
Weibull
Running-in
failures excluded
2.04·10
-6
2.87·10
-6
3.50·10
-6
4.04·10
-6
Pump electric
motors 6.6 kV FS
1.80·10
-5
1.80·10
-5
Log-linear
Weibull
-
1.57·10
-5
1.89·10
-5
2.14·10
-4
8.20·10
-5
2.94·10
-3
1.94·10
-4
4.02·10
-2
3.56·10
-4
LPSI and CSS FR
pumps
8.90·10
-5
Weibull
-
5.91·10
-5
1.38·10
-4
2.26·10
-4
3.21·10
-4
CCS FD pumps
3.60·10
-5
Log-linear
3.85·10
-5
8.25·10
-5
1.77·10
-4
3.78·10
-4
CSS FO valves
6.80·10
-4
Weibull
Running-in
failures excluded
7.59·10
-4
1.49·10
-3
2.21·10
-3
2.92·10
-3
CSS RF reverse
valves
2.30·10
-6
Log-linear
-
1.74·10
-6
3.93·10
-6
8.89·10
-6
2.01·10
-5
LPSI FD valves
1.10·10
-4
Log-linear
-
7.59·10
-4
1.49·10
-3
2.21·10
-3
2.02·10
-3
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