Research Article
Simulations of Core Damage Progression for TMI-2 Severe Accident Using CINEMA Computer Code
Table 1
Detailed main events in TMI-2 severe accident.
| Time (s) | Main events |
| 0 | Turbine and main feedwater pump trip | 3 | Pressurizer PORV valve opening | 8 | Reactor scram on high pressure signal | 13 | No pressurizer PORV valve closing | 41 | Operation of 1 (of 3) makeup pump 1B | 122 | HPI operation | 278 | Stop of HPI | 480 | Auxiliary feedwater startup | 552 | Core boiling begins | 4,440 | Shutdown B-loop RCP (end of phase 1) | 6,000 | Shutdown A-loop RCP | 6,184 | Core uncover | 7,442 | Cladding oxidation begins | 7,719 | Cladding failure | 8,340 | Close of the PORV line block valve | 9,014 | Fuel melting | 10,440 | Restart one B-loop RCP (end of phase 2) | 11,580 | Shutdown of the B-loop RCP | 12,000 | Start of primary system feed and bleed | 13,440 | Core material slumping (end of phase 3) | 18,000 | General emergency declared (end of phase 4) |
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