Research Article
Time-Series Forecasting of a Typical PWR Undergoing Large Break LOCA
Table 2
Normalized uncertain parameters [
28,
30].
| Nos. | Parameter description | Mean, μ | PDF | Standard deviation, σ | Range, – |
| 1 | Core power | 1.0 | Normal | 0.0155 | 0.9691–1.0309 | 2 | Groeneveld-CHF | 1.0 | Normal | 0.500 | 0.171–2.1711 | 3 | Chen nucleate boiling HTC | 1.0 | Normal | 0.234 | 0.382–1.618 | 4 | Transition boiling HTC | 1.0 | Normal | 0.230 | 0.54–1.46 | 5 | Dittus–Boelter liquid HTC | 1.0 | Normal | 0.196 | 0.607–1.393 | 6 | Dittus–Boelter vapor HTC | 1.0 | Normal | 0.196 | 0.607–1.393 | 7 | Film boiling HTC | 1.0 | Normal | 0.287 | 0.426–1.574 | 8 | Break discharge coefficient | 1.0 | Normal | 0.115 | 0.77–1.23 | 9 | Decay heat | 1.0 | Normal | 0.051 | 0.898–1.102 | 10 | Oxidization dial | 1.0 | Normal | 0.01 | 0.980–1.020 | 11 | SIT actuation pressure | 1.0 | Normal | 0.025 | 0.949–1.051 | 12 | SIT loss coefficient | 1.0 | Normal | 0.20 | 0.6–1.4 | 13 | Pressurizer pressure | 1.0 | Normal | 0.113 | 0.77–1.23 | 14 | Fuel thermal conductivity | 1.0 | Normal | 0.0773 | 0.8455–1.1545 | 15 | Gap conductance | — | Uniform | — | 0.75–1.50 | 16 | Downcomer wall thermal conductivity | — | Uniform | — | 1.0–2.0 | 17 | SIT water inventory | | Uniform | | 0.9634–1.0372 | 18 | Pump two-phase head multiplier | — | Uniform | — | 0.0–1.0 | 19 | Pump two-phase torque multiplier | — | Uniform | — | 0.0–1.0 | 20 | SIT water temperature | — | Uniform | — | 0.955–1.045 | 21 | SIP (IRWST) water temperature | — | Uniform | — | 0.936–1.064 | 22 | SIP flow multiplier | — | Uniform | — | 0.5–1.5 | 23 | Pump K-factor | — | Uniform | — | 0.239–0.577 |
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