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Table 5
Main scenario uncertainties − truncated normal law at ±3σ⋅
| Scenario variables | Uncertainty range at (±2σ) | Nominal value | Derivation (σ) | Inf limit (−3σ) | Sup limit (+3σ) |
|---|---|---|---|---|---|
| Initial reactor power | ±5% | 1500 MW | 2.5 | −7.5 | 7.5 |
| Residual power | ±20% | Calculated decrease (neutronic results) | 10 | −30 | 30 |
| Primary pumps inertia | ±20% | 8000 kg.m2 | 10 | −30 | 30 |
| % of primary flow rate; criterion for RBH rods triggering | ±20% | 45% | 10 | −30 | 30 |
| Anti-reactivity of one RBH rod | ±5% | 722 pcm | 2.5 | −7.5 | 7.5 |
| Fall duration of RBH rods fall | ±20% | 3 s | 10 | −30 | 30 |
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