Research Article
Reliability Assessment for a Safety-Related Digital Reactor Protection System Using Event-Tree/Fault-Tree (ET/FT) Method
Table 4
Calculation results for Top Event RT 1IN ST (1/yr).
| | Signal type | CCFs included | CCFs excluded | | Mean | 5th perc. | 95th perc. | Mean | 5th perc. | 95th perc. |
| | Analog | 5.97 × 10−4 | 1.12 × 10−4 | 1.88 × 10−3 | 1.94 × 10−5 | 1.43 × 10−5 | 9.47 × 10−5 | | Digital | 2.51 × 10−4 | 4.61 × 10−5 | 7.88 × 10−3 | 6.11 × 10−6 | 3.82 × 10−6 | 3.23 × 10−5 | | Thermocouple | 7.94 × 10−4 | 1.47 × 10−4 | 2.50 × 10−3 | 2.70 × 10−5 | 1.99 × 10−5 | 1.41 × 10−4 |
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