Research Article
Reliability Assessment for a Safety-Related Digital Reactor Protection System Using Event-Tree/Fault-Tree (ET/FT) Method
Table 1
Failure rates of components (/h).
| | Module | λD | λUS | λUU |
| | ACM | 2.52 × 10−6 | 7.50 × 10−8 | 1.25 × 10−8 | | DCM | 6.35 × 10−7 | 3.02 × 10−9 | 3.64 × 10−9 | | TCM | 4.61 × 10−6 | 7.72 × 10−8 | 2.05 × 10−8 | | AI | 2.02 × 10−6 | 3.83 × 10−8 | 9.95 × 10−9 | | DI | 9.00 × 10−7 | 9.45 × 10−9 | 1.71 × 10−9 | | EXT | 6.75 × 10−7 | 5.70 × 10−9 | 1.11 × 10−9 | | COM | 7.65 × 10−7 | 6.60 × 10−9 | 1.11 × 10−9 | | CPU | 3.68 × 10−6 | 3.90 × 10−8 | 1.30 × 10−8 | | DO | 7.38 × 10−7 | 9.46 × 10−8 | 1.24 × 10−9 |
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