Research Article
Cost Estimation and Efficiency Analysis of Korean CANDU Spent Fuel Disposal Alternatives in Consideration of Future Price Volatility
Table 5
ARIMA estimation models for the price forecasting of cost drivers.
| | Model type | Model parameters | Ljung-Box Q | Coefficients | -value (sig.) | Statistics | DF | Sig. |
| Tunnel excavation | | AR Lag 1 | 0.984 | 10.669 (0.000) | 17.380 | 16 | 0.361 | MA Lag 1 | 0.862 | 3.194 (0.003) |
| Disposal hole | | AR Lag 1 | 0.984 | 10.669 (0.000) | 17.380 | 16 | 0.361 | MA Lag 1 | 0.862 | 3.194 (0.003) |
| Bentonite | | AR Lag 1 | 0.999 | 337.68 (0.000) | 3.848 | 17 | 1.000 |
| Canister | Cast iron | | MA Lag 1 | −0.338 | −1.961 (0.059) | 5.479 | 17 | 0.996 | Copper plate | | Constant | 7,299.2 | 3.405 (0.002) | 7.765 | 17 | 0.971 | AR Lag 1 | 0.946 | 19.069 (0.000) | Copper powder | | Constant | 43,434.7 | 4.479 (0.000) | 9.616 | 17 | 0.919 | AR Lag 1 | 0.929 | 14.854 (0.000) |
| Backfilling | | AR Lag 1 | 0.999 | 337.68 (0.000) | 3.848 | 17 | 1.000 |
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