Research Article
Assessment of Severe Accident Depressurization Valve Activation Strategy for Chinese Improved 1000 MWe PWR
Table 1
Progressions of the three accident sequences.
| | | Without SADV activation | With SADV activation | | | TMLB’ | SBLOCA | LOFW | TMLB’ | SBLOCA | LOFW |
| | Progression (s) | | | | | | | | Start of accident | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | Reactor shutdown | 0.0 | 1220 | 20 | 0.0 | 1220 | 20 | | Opening SADV manually | / | / | / | 7410 | 8100 | 5630 | | Accumulator activation | / | / | / | 7410 | 8100 | 5630 | | Start of core melt | 8430 | 8950 | 6470 | 12450 | 12610 | 10020 | | Lower head of RPV fails | 18990 | 17250 | 15520 | 20100 | 21850 | 19050 | | RCS pressure when lower head of RPV fails/MPa | 16.5 | 16.5 | 16.5 | 0.55 | 0.26 | 0.31 |
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