| 1 |
3/11 14:46:00 |
0 |
0.00 |
Earthquake |
| 2 |
3/11 14:47:35 |
95 |
0.03 |
Reactor scram |
| 3 |
3/11 14:48:45 |
165 |
0.05 |
MSIV closed |
| 4 |
3/11 15:05:00 |
1,140 |
0.32 |
RCIC manually started |
| 5 |
3/11 15:25:00 |
2,340 |
0.65 |
RCIC automatically tripped (L-8) |
| 6 |
3/11 15:36:00 |
3,000 |
0.83 |
Tsunami hit |
| 7 |
3/11 15:38:00 |
3,120 |
0.87 |
Station black-out |
| 8 |
3/11 16:03:00 |
4,620 |
1.28 |
RCIC manually started |
| 9 |
3/12 11:36:00 |
75,000 |
20.83 |
RCIC automatically tripped |
| 10 |
3/12 12:06:00 |
76,800 |
21.33 |
Alternative S/C spray by DDFP |
| 11 |
3/12 12:35:00 |
78,540 |
21.82 |
HPCI automatically started (L-2) |
| 12 |
3/13 02:42:00 |
129,360 |
35.93 |
HPCI manually stopped |
| 13 |
3/13 03:05:00 |
130,740 |
36.32 |
Alternative S/C spray by DDFP was stopped. Completion of switchover to alternative water injection into the reactor reported to MCR |
| 14 |
3/13 05:08:00 |
138,120 |
38.37 |
Alternative S/C spray by DDFP started (switched over from the alternative water injection line into the reactor) |
| 15 |
3/13 07:39:00 |
147,180 |
40.88 |
Alternative D/W spray by DDFP started (switched over from the alternative S/C spray) |
| 16 |
3/13 07:43:00 |
147,420 |
40.95 |
Alternative S/C spray by DDFP was halted |
| 17 |
3/13 08:40:00 to 09:10:00 |
150,840 to 152,640 |
41.9 to 42.4 |
Alternative D/W spray by DDFP halted. Switched over to alternative water injection line into the reactor. |
| 18 |
around 3/13 09:08:00 |
around 152,520 |
around 42.37 |
Reactor depressurized |
| 19 |
3/13 09:20:00 |
153,240 |
42.57 |
PCV pressure decrease by venting confirmed |
| 20 |
3/13 09:25:00 |
153,540 |
42.65 |
Freshwater injection started by fire engines |
| 21 |
3/13 11:17:00 |
160,260 |
44.52 |
Closure of AO-valve of S/C venting line confirmed due to loss of driving gas pressure |
| 22 |
3/13 12:20:00 |
164,040 |
45.57 |
Freshwater injection terminated due to water inventory depletion in fire protection pools. Switching over to seawater injection started |
| 23 |
3/13 12:30:00 |
164,640 |
45.73 |
S/C vent valve opened for PCV venting |
| 24 |
3/13 13:12:00 |
167,160 |
46.43 |
Seawater injection line configured and injection started |
| 25 |
3/14 01:10:00 |
210,240 |
58.40 |
Water injection halted to make up the water source pit |
| 26 |
3/14 03:20:00 |
218,040 |
60.57 |
Water source pit make up done. Seawater injection resumed |
| 27 |
3/14 05:20:00 |
225,240 |
62.57 |
Small S/C vent valve (AO) opening started for PCV venting |
| 28 |
3/14 06:10:00 |
228,240 |
63.40 |
Small S/C vent valve (AO) opening started for PCV venting |
| 29 |
3/14 11:01:00 |
245,700 |
68.25 |
Unit 3 reactor building exploded |
| 30 |
3/14 11:01:00 |
245,700 |
68.25 |
Seawater injection halted (as consequence of the explosion) |
| 31 |
3/14 15:30:00 |
261,840 |
72.73 |
Seawater injection resumed |
| 32 |
3/14 19:30:00 to 19:54:00 |
276,240 to 277,680 |
76.73 to 77.13 |
Seawater injection halted (fire engines found to have been out-of-service from 30 min to 1 hour before 19:20) |
| 33 |
3/14 21:14:00 |
282,480 |
78.47 |
Seawater injection halted |
| 34 |
3/15 02:30:00 |
301,440 |
83.73 |
Seawater injection resumed |
| 35 |
3/15 16:05:00 |
350,340 |
97.32 |
S/C vent valve closure assumed for PCV venting |