The massive 9.0-magnitude quake and the tsunami on 11 March have killed more than 11,000 people, with at least 16,700 people still missing across north-eastern Japan along with a massive Nuclear crisis. Major events of Fukushima Dai‐ichi Nuclear Power Station Unit 1 upto today are:
11th 14:46 Under operation, Automatic shutdown by the earthquake
11th 15:42 Report based on the Article 10 (Total loss of A/C power)
11th 16:36 Occurrence of the Article 15 event (Inability of water injection of the Emergency Core Cooling System )
12th 01:20 Occurrence of the Article 15 event (Unusual rise of the pressure in PCV)
12th 10:17 Started to vent.
12th 15:36 Sound of explosion
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| Reactor-1 |
12th 20:20 Started to inject seawater and borated water to core.
23rd 02:33 The amount of injected water to the Rector Core was increased utilizing the Feedwater Line in addition to the Fire Extinguish Line. (2m3/h →18m3/h)
23rd 09:00 Switched to the Feedwater Line only.(18m3/h →11m3/h)
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| Reactor-1 |
25th 15:37 Started fresh water injection.
29th 08:32 Switched to the water injection to the core using the temporary motor‐driven pump.
31st 12:00 Started to transfer the stagnant water from the Condensate Storage Tank (CST) to the Surge Tank of Suppression Pool Water (SPT)
31st 13:03 ~16:04 Fresh water spray by Concrete Pump Truck (Fresh water)
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