Research Article
Application of ASTEC, MELCOR, and MAAP Computer Codes for Thermal Hydraulic Analysis of a PWR Containment Equipped with the PCFV and PAR Systems
Table 2
Main results of the in-vessel severe accident analysis important for the latter containment behaviour.
| Parameter | ASTEC | MELCOR | MAAP |
| Mass of water released from the RCS before the RPV failure | 128000 kg | 105000 kg | 130000 kg | Mean mass flow rate at the break | 11 kg/s | 9 kg/s | 11 kg/s | Temperature of released water/steam | 600–1100 K | 600–1100 K | 600–1000 K | Mass of hydrogen produced in the RPV | 268 kg | 211 kg | 265 kg | RCS pressure at the time of the RPV failure | 5.6 MPa | 7.8 MPa | 6.9 MPa | Mass of material released from the RPV | 85700 kg | 87500 kg | 88000 kg | Temperature of released material | 2400 K | 2120 K | 2330 K | Long term decay heat level in the material accumulated in the cavity | 4–14 MW |
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