Research Article
Assessment of Severe Accident Management for Small IPWR under an ESBO Scenario
Table 2
Sequence of the different mitigation measures.
| | Accident sequence | Depressurization (lower pressure) | No depressurization (high pressure) | Depressurization-PSS working | No depressurization- PSS working |
| | Accident began (s) | 1000 | 1000 | 1000 | 1000 | | Reactor scram (s) | 1010 | 1010 | 1010 | 1010 | | Core began to uncover (s) | 1045 | 4215 | 1045 | 4410 | | Achieve SAM entrance standards (core exit temperature > 1083 K) (s) | 1405 | 8090 | — | 8090 | | PRV action (s) | 1010 | — | 1010 | — | | PRHRS work (s) | — | — | — | 8090 | | Passive high-pressure safety injection system work (s) | — | — | 1015 | 8095 | | Core’s final state (s) | Melting (1845) | Melting (12080) | Avoid melting (core is uncovering) | Avoid melting (core is submersed) |
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