![]() 15:30: The emergency condenser designed to cool the steam inside the pressure vessel of the No. 1 reactor fails.Further waves arrive, ultimately a major wave destroys the tidal gauge. This wave was measured by the tidal gauge at 4 m (13 ft) and did not overcome the site design of 5.7 m (18.7 ft), being mitigated by the seawall. 15:27: The first tsunami wave, of a series of seven waves, struck the plant.The operators following the manual, shutting down the emergency cooling system as reactor temperature dropped sharply. 15:03: Reactor 1's emergency cooling system was manually shut down to avoid reactor damage (temperature was not critical at this point).14:52: Reactor 1's emergency cooling system, which was capable of running without external power, turned on automatically.At SCRAM, 6.5% of the previous output power is still generated, falling to 1.5% after an hour, and approximately 0.4% after 24 hours. 14:47: Nuclear reaction has stopped, however decay heat generation continues.14:47: G002 GENERATOR VOLT 18.56 > 18.50 kV (indicates the diesel generators are running above minimum voltage).14:47: A553 ALL CR FULL IN (all control rods full in) ON.14:46:58: 420 ms D535 Reactor SCRM B Trip (Reactor B SCRAM started). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |