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Reactor no.1
Reactor no.2
Reactor no.3
Reactor no.4
The observations from the Tepco webcam (cached since 5am March 11th)
Sprayings to the spent fuel pools * Anti-dust sprayings * Fukushima Images
Fukushima reactor no.1 monitoring pressure/temperature data
For more recent data from Tepco, go here
Time RP(A) RP(B) D/W S/C FNT BHT WL(A) WL(B) DW R/H Ref
MPa abs MPa abs MPa abs MPa abs gr.C gr.C meter meter gr.C
11:00, May 16th 0.586 1.451 0.117 0.100 94.6 83.1 DS -1.75 83.5/80.5 Tepco
05:00, May 16th 0.586 1.451 0.118 0.100 95.1 83.9 DS -1.70 84.6/81.1 Tepco
11:00, May 15th 0.586 1.436 0.122 0.100 110.4 88.6 DS -1.70 89.1/84.1 Tepco
05:00, May 15th 0.589 1.431 0.122 0.100 110.2 88.8 DS -1.70 89.1/84.0 Tepco
11:00, May 14th 0.584 1.406 0.121 0.100 111.0 90.0 DS -1.70 90.2/84.7 Tepco
05:00, May 14th 0.581 1.411 0.121 0.100 114.5 90.2 DS -1.70 89.9/85.0 Tepco
11:00, May 13th 0.579 1.399 0.120 0.100 114.2 91.0 DS -1.70 90.9/85.5 Tepco
05:00, May 13th 0.586 1.396 0.120 0.100 114.3 91.3 DS -1.70 91.2/85.8 Tepco
11:00, May 12th 0.566 1.401 0.121 0.100 114.9 92.5 DS -1.65 92.7/87.0 Tepco
05:00, May 12th 0.564 1.394 0.120 0.100 114.7 92.7 DS -1.65 93.0/87.3 Tepco
11:00, May 11th 0.561 1.379 0.110 0.100 114.1 93.2 DS -1.50 93.3/88.0 Tepco
05:00, May 11th 0.564 1.381 0.120 0.105 114.9 93.7 DS -1.70 93.8/88.6 Tepco
11:00, May 10th 0.564 1.374 0.120 0.105 114.7 94.5 DS -1.65 94.6/89.2 Tepco
05:00, May 10th 0.559 1.376 0.115 0.105 115.7 94.7 -1.65 -1.65 94.7/89.4 Tepco
11:00, May 9th 0.566 1.389 0.120 0.105 116.6 95.3 -1.65 -1.65 95.4/89.8 Tepco
05:00, May 9th 0.561 1.401 0.120 0.105 115.8 95.4 -1.65 -1.70 95.5/89.9 Tepco
05:00, May 8th 0.561 1.391 0.120 0.110 119.8 96.9 -1.65 -1.70 97.0/91.0 Tepco
11:00, May 7th 0.564 1.391 0.125 0.115 124.7 98.7 -1.70 -1.65 98.6/92.1 Tepco
05:00, May 7th 0.566 1.404 0.125 0.115 124.8 99.4 -1.70 -1.70 99.4/92.6 Tepco
11:00, May 6th 0.566 1.386 0.130 0.120 134.1 102.6 -1.65 -1.70 102.9/94.7 Tepco
05:00, May 6th 0.564 1.396 0.130 0.120 134.7 102.8 -1.70 -1.70 103.1/94.9 Tepco
11:00, May 5th 0.561 1.384 0.130 0.130 134.7 101.5 -1.65 -1.50 102.4/92.2 Tepco
05:00, May 5th 0.551 1.379 0.130 0.130 135.2 102.0 -1.60 -1.60 102.6/92.3 Tepco
11:00, May 4th 0.551 1.366 0.135 0.135 137.5 103.2 -1.70 -1.70 104.1/92.7 Tepco
05:00, May 4th 0.561 1.369 0.135 0.135 138.4 103.6 -1.70 -1.70 104.3/92.8 METI125
11:00, May 3rd 0.556 1.359 0.135 0.135 141.9 105.7 -1.70 -1.70 106.5/95.0 METI124
05:00, May 3rd 0.554 1.354 0.135 0.135 142.1 105.7 -1.70 -1.70 106.5/94.8 Tepco
11:00, May 2nd 0.549 1.346 0.135 0.135 142.2 105.8 -1.65 -1.70 106.5/94.8 Tepco
05:00, May 2nd 0.554 1.341 0.135 0.135 142.3 105.7 -1.65 -1.70 106.4/94.8 METI123
11:00, May 1st 0.541 1.326 0.130 0.130 142.0 105.2 -1.65 -1.70 105.8/94.3 METI122
05:00, May 1st 0.546 1.331 0.130 0.130 141.3 104.7 -1.65 -1.65 105.2/94.0 Tepco
05:00, April 30th 0.546 1.306 0.120 0.115 131.2 101.6 -1.65 -1.70 102.2/91.4 METI121
11:00, April 29th 0.511 1.276 0.105 0.105 114.7 95.0 -1.70 -1.70 95.2/87.0 METI120
10:14, April 29th Water injection returned to 6 m3/h, after testing of increased rates since 10:02, April 27th
09:00, April 29th Water injection rate currently at 10 m3/h
05:00, April 28th 0.516 1.269 0.125 0.125 107.3 98.5 -1.65 -1.60 100.5/88.3 METI118
10:02, April 27th Start test of increased injection rates (up to 14 m3/h) to determine rate needed to flood CV
05:00, April 27th 0.551 1.306 0.150 0.155 132.0 110.5 -1.65 -1.60 112.6/97.2 METI116
05:00, April 26th 0.546 1.286 0.150 0.150 134.7 110.9 -1.65 -1.65 113.4/96.9 METI115
23:00, April 25th 0.551 1.274 0.150 0.150 133.3 111.3 -1.65 -1.65 113.7/97.0 METI114
06:00, April 25th 0.551 1.274 0.155 0.155 137.7 111.4 -1.70 -1.65 114.0/96.6 METI113
00:00, April 25th 0.541 1.261 0.155 0.155 137.7 111.3 -1.70 -1.70 114.0/96.5 METI112
12:00, April 24th 0.534 1.244 0.155 0.155 133.5 110.8 -1.70 -1.70 114.0/96.3 METI111
12:00, April 23rd 0.541 1.231 0.160 0.160 142.3 112.4 -1.70 -1.70 METI110
00:00, April 23rd 0.541 1.229 0.160 0.160 135.3 112.7 -1.65 -1.65 METI109
12:00, April 22nd 0.541 1.221 0.160 0.160 136.5 112.8 -1.65 -1.65 METI108
06:00, April 22nd 0.536 1.214 0.160 0.160 137.4 113.0 -1.65 -1.65 METI107
12:00, April 21st 0.534 1.211 0.160 0.160 153.3 113.6 -1.65 -1.65 METI106
06:00, April 21st 0.526 1.204 0.160 0.160 153.4 113.5 -1.70 -1.65 METI105
12:00, April 20th 0.521 1.179 0.160 0.160 154.1 113.3 -1.70 -1.70 METI104
00:00, April 20th 0.524 1.171 0.165 0.165 164.1 113.9 -1.60 -1.65 METI103
12:00, April 19th 0.531 1.149 0.165 0.170 167.8 114.9 -1.60 -1.65 METI102
06:00, April 19th 0.524 1.141 0.170 0.170 169.0 115.1 -1.60 -1.65 METI101
13:00, April 18th 0.529 1.136 0.170 0.170 170.2 115.2 -1.65 -1.65 METI100
06:00, April 18th 0.524 1.131 0.170 0.170 173.9 115.4 -1.65 -1.65 METI99
12:00, April 17th 0.521 1.074 0.175 0.170 180.4 116.6 -1.65 -1.65 METI98
12:00, April 16th 0.524 1.076 0.185 0.175 189.9 118.1 -1.65 -1.65 METI97 WL time 14.:00
06:00, April 16th 0.523 1.079 0.190 0.170 189.9 118.3 -1.65 -1.65 METI96
12:00, April 15th 0.530 1.064 0.190 0.170 195.4 119.9 -1.65 -1.65 METI95
03:00, April 15th 0.529 1.054 0.185 0.165 197.0 119.4 -1.55 -1.55 METI94
06:00, April 14th 0.521 1.041 0.190 0.165 201.8 119.2 -1.60 -1.60 METI93
00:00, April 14th 0.524 1.041 0.190 0.165 203.6 119.5 -1.60 -1.60 METI92
12:00, April 13th 0.520 1.034 0.190 0.165 204.5 118.9 -1.60 -1.65 METI91
06:00, April 13th 0.524 1.029 0.190 0.165 206.2 119.0 -1.65 -1.65 METI90
06:00, April 12th 0.517 1.009 0.190 0.165 220.8 119.9 -1.65 -1.65 METI88
18:11, April 11th --injection of water to core resumed--- -----------------------------
17:56, April 11th --injection of water to core is stopped -----------------------------
17:16, April 11th --M7.1 earthquake, epicenter 80 km south of Fukushima, tsunami warning
12:00, April 11th 0.517 0.974 0.195 0.165 216.2 119.0 -1.65 -1.65 METI87
06:00, April 11th 0.511 0.974 0.195 0.165 222.9 N/A -1.65 -1.65 J80
02:00, April 11th 0.514 0.974 0.195 0.165 222.8 120.2 -1.65 -1.65 METI86 Time for RP is 00:00
10:00, April 10th 0.514 0.959 0.195 0.160 227.1 120.4 -1.60 -1.70 METI85
06:00, April 10th 0.511 0.949 0.195 0.165 227.7 120.6 -1.65 -1.65 METI84
12:00, April 09th 0.510 0.924 0.190 0.160 235.2 120.1 -1.65 -1.65 METI83
00:00, April 09th 0.496 0.904 0.190 0.155 240.5 119.7 -1.65 -1.65 METI82
12:00, April 08th 0.496 0.894 0.185 0.155 246.6 119.4 -1.65 -1.65 METI81
00:00, April 08th 0.491 0.889 0.180 0.150 260.7 118.6 -1.65 -1.65 METI80
12:00, April 07th 0.476 0.859 0.165 0.150 223.8 116.9 -1.65 -1.65 METI79
06:00, April 07th 0.464 0.859 0.155 0.155 216.3 116.2 -1.65 -1.65 METI78
01:31, April 07th -start injection of nitrogen gas into the drywell--------------------
22:30, April 06th -valve opening operation as preparation of injection of nitrogen gas-
12:00, April 06th 0.414 0.754 0.150 0.150 214.0 115.0 -1.65 -1.65 METI77
00:00, April 06th 0.405 0.733 0.150 0.150 221.6 114.8 -1.65 -1.65 METI76
06:00, April 05th 0.409 0.720 0.150 N/A 233.5 114.8 -1.70 -1.65 METI74
11:00, April 04th 0.399 0.704 0.150 0.150 242.8 115.3 -1.65 -1.65 METI73
00:00, April 04th 0.405 0.693 0.155 0.155 243.1 115.8 -1.65 -1.65 METI72
09:00, April 03rd 0.394 0.648 0.155 0.155 252.8 116.7 -1.65 -1.65 METI71
03:00, April 03rd 0.391 0.643 0.155 0.160 256.7 117.2 -1.65 -1.65 METI70
12:00, April 02nd 0.391 0.632 0.155 0.155 259.4 117.6 -1.65 -1.65 METI69
04:00, April 02nd 0.389 0.621 0.160 0.160 261.5 118.0 -1.60 -1.60 METI68
10:00, April 01st 0.396 0.598 0.165 0.165 248.6 118.5 -1.65 -1.65 METI67
06:00, April 01st 0.394 0.596 0.170 0.170 255.2 119.7 -1.60 -1.60 N66
00:00, April 01st 0.394 0.583 0.175 N/A 256.2 N/A -1.65 -1.65 J53
12:00, March 31st 0.430 0.609 0.210 0.205 246.1 126.1 -1.60 -1.65 N65
08:00, March 31st 0.430 0.609 0.210 0.205 249.4 N/A -1.65 -1.65 J52
04:00, March 31st 0.434 0.612 0.210 0.210 251.2 128.0 -1.65 -1.65 J50/METI
13:00, March 30th 0.441 0.592 0.230 0.230 270.1 130.2 -1.60 -1.60 J49
04:00, March 30th 0.454 0.589 0.235 0.235 281.2 133.9 -1.60 -1.60 N62
22:00, March 29th 0.454 0.583 0.245 N/A 290.5 N/A -1.65 -1.65 J47
13:00, March 29th 0.472 0.592 0.265 0.265 299.4 135.8 -1.65 -1.60 N61
12:00, March 29th 0.484 0.592 0.275 0.275 309.6 137.6 -1.65 -1.65 N61
09:40, March 29th 0.484 0.592 0.275 0.275 N/A N/A -1.65 -1.65 N61
06:00, March 29th 0.493 0.603 0.285 0.285 323,3 139.4 -1.60 -1.60 N60
04:00, March 29th 0.493 0.603 0.285 0.285 323,3 139.4 -1.60 -1.60 N60
01:00, March 29th 0.495 0.601 0.290 N/A N/A N/A -1.50 -1.65
12:30, March 28th 0.477 0.533 0.270 0.270 304.5 139.3 -1.70 -1.65 N59
03:00, March 28th 0.477 0.544 0.270 0.270 N/A N/A -1.70 -1.65 N58
09:00, March 27th 0.475 0.517 0.270 0.270 224.8 143.4 -1.65 -1.60 N57
05:00, March 27th 0.472 0.508 0.270 0.270 212.8 141.7 -1.65 -1.60 N56
13:00, March 26th 0.452 0.481 0.275 0.275 212.3 146.9 -1.65 -1.60 N55
09:30, March 26th 0.477 0.461 0.270 0.270 195.3 146.3 -1.65 -1.60 N54
05:00, March 26th 0.454 0.461 0.270 0.270 209.4 144.3 -1.65 -1.60 N53
16:30, March 25th 0.443 0.443 0.275 0.275 196.9 148.5 -1.65 -1.60 N52
15:37, March 25th - start injection of fresh-water to the core ---------------------
10:00, March 25th 0.450 0.450 0.295 0.290 197.8 153.6 -1.65 -1.65 N51
06:00, March 25th 0.466 0.452 0.310 0.305 204.5 157.5 -1.70 -1.65 N50
17:00, March 24th 0.540 0.468 0.355 0.355 217.9 172.4 -1.65 -1.65 N49
11:00, March 24th 0.533 0.502 0.400 0.395 175.3 182.8 -1.70 -1.70 N48
01:00, March 24th 0.511 0.488 0.385 0.370 243 229 -1.70 -1.70 N47
16:00, March 23rd 0.481 0.459 0.360 0.330 305 306 -1.75 -1.70 N46
12:00, March 23rd 0.457 0.420 0.320 0.300 345 350 -1.75 -1.75 N45
06:00, March 23rd N/A N/A N/A N/A 400 400 OT
04:00, March 23rd 0.403 0.391 0.260 0.240 >400 >400 -1.75 -1.75 N44
17:00, March 22nd N/A N/A N/A N/A 386 394 OT
15:30, March 22nd 0.317 0.270 0.175 0.160 386 394 -1.80 -1.75 N43
11:20, March 22nd 0.328 0.306 0.175 0.155 383 394 -1.80 -1.75 N42/PC
06:00, March 22nd 0.297 0.268 0.160 0.155 380 388 -1.75 -1.70 N41/PC
05:00, March 22nd N/A N/A N/A N/A 383 391 N/A N/A PC
00:15, March 22nd N/A N/A N/A N/A 381 387 N/A N/A PC
14:25, March 21st 0.299 0.272 0.160 0.155 380 390 -1.75 -1.75 N40/OT
14:00, March 21st N/A N/A N/A N/A 380 390 N/A N/A PC
13:30, March 21st N/A N/A N/A N/A 380 390 N/A N/A PC
08:00, March 21st 0.297 0.265 0.160 0.160 370 390 -1.75 -1.75 N39/PC
05:00, March 21st 0.295 0.259 0.160 0.160 N/A N/A N38
03:00, March 21st N/A N/A N/A N/A 370 381 N/A N/A PC
22:00, March 20th N/A N/A N/A N/A 370 388 PC
15:00, March 20th 0.288 0.259 0.170 0.160 N/A N/A N37
13:00, March 20th N/A N/A N/A N/A 394 400 OT
11:00, March 20th 0.295 0.261 0.170 0.160 N/A N/A N36
05:00, March 20th 0.304 0.263 0.180 0.170 393 396.6 N35/PC
03:30, March 20th N/A N/A N/A N/A 393 397 OT
16:50, March 19th 0.306 0.261 0.180 0.170 N/A N/A N34
11:00, March 19th 0.297 0.252 0.170 0.170 N/A N/A N33
03:30, March 19th 0.306 0.256 0.180 0.165 N/A N/A -1.80 -1.70 N32
21:10, March 18th 0.295 0.252 0.180 0.160 N/A N/A N31
07:55, March 18th 0.270 0.247 N/A N/A N/A N/A -1.70 dscal N30
02:50, March 18th 0.265 0.243 N/A N/A N/A N/A N29
11:30, March 17th 0.274 0.245 N/A N/A N/A N/A -1.80 N28
03:10, March 17th 0.299 0.252 N/A N/A N/A N/A -1.80 -1.75 N27
00:07, March 17th N/A 0.315 N/A N/A N/A N/A N/A -1.80 OTH
14:30, March 16th N/A 0.308 N/A N/A N/A N/A N/A -1.75 OT
12:25, March 16th 0.308 0.272 N/A N/A N/A N/A -1.75 -1.75 N26
10:00, March 16th N/A 0.268 N/A N/A N/A N/A N/A -1.75 OT
09:20, March 16th N/A 0.268 N/A N/A N/A N/A N/A -1.75 OT
07:00, March 16th N/A 0.268 N/A N/A N/A N/A N/A -1.75 OT
06:55, March 16th 0.28 N/A N/A N/A N/A N/A -1.8 N/A FEPC
06:00, March 16th N/A 0.263 N/A N/A N/A N/A N/A -1.75 OT
04:00, March 16th N/A 0.259 N/A N/A N/A N/A N/A -1.75 OT
01:35, March 16th N/A 0.270 N/A N/A N/A N/A N/A -1.75 OT
18:43, March 15th 0.270 0.267 N/A N/A N/A N/A -1.80 -1.80 N25
11:42, March 15th 0.274 0.286 0.315 N/A N/A N/A -1.70 -1.70 N24
04:00, March 15th N/A 0.317 N/A N/A N/A N/A N/A -1.75 OT
03:00, March 15th N/A 0.324 N/A N/A N/A N/A N/A -1.70 OT
22:40, March 14th N/A 0.341 N/A N/A N/A N/A N/A -1.70 OT
19:30, March 14th 0.249 0.371 N/A N/A N/A N/A dscale dscale N23
16:00, March 14th N/A 0.371 N/A N/A N/A N/A N/A -1.75 OT
15:00, March 14th N/A 0.369 N/A N/A N/A N/A N/A -1.80 OT
14:00, March 14th N/A 0.377 N/A N/A N/A N/A N/A -1.80 OT
13:00, March 14th N/A 0.376 dscale N/A N/A N/A N/A -1.80 OT
12:00, March 14th N/A 0.376 0.480 0.485 N/A N/A N/A -1.80 OT
11:30, March 14th N/A 0.376 0.440 0.435 N/A N/A N/A -1.80 OT
09:00, March 14th N/A 0.376 0.450 0.445 N/A N/A N/A -1.75 OT
08:00, March 14th N/A 0.385 0.460 0.455 N/A N/A N/A -1.75 OT
07:00, March 14th N/A 0.389 0.475 0.470 N/A N/A N/A -1.75 OT
06:00, March 14th N/A 0.394 0.485 0.480 N/A N/A N/A -1.70 OT
05:00, March 14th N/A 0.400 0.490 0.485 N/A N/A N/A -1.70 OT
04:00, March 14th N/A 0.405 0.495 0.490 N/A N/A N/A -1.70 OT
03:00, March 14th N/A 0.409 0.505 0.500 N/A N/A N/A -1.70 OT
03:00, March 14th N/A 0.416 0.510 0.505 N/A N/A N/A -1.70 OT
00:30, March 14th N/A 0.425 0.530 0.530 N/A N/A N/A -1.75 OT
23:30, March 13th N/A 0.425 0.530 0.530 N/A N/A N/A -1.75 OT
23:00, March 13th N/A 0.434 0.540 0.530 N/A N/A N/A -1.75 OT
22:20, March 13th N/A 0.434 0.540 0.540 N/A N/A N/A -1.75 OT
22:05, March 13th N/A 0.443 0.540 0.540 N/A N/A N/A -1.75 OT
21:40, March 13th N/A 0.443 0.550 0.550 N/A N/A N/A -1.75 OT
20:45, March 13th N/A 0.443 0.560 0.560 N/A N/A N/A -1.75 OT
19:55, March 13th N/A 0.454 0.575 0.570 N/A N/A N/A -1.70 OT
19:30, March 13th N/A 0.459 0.580 0.580 N/A N/A N/A -1.70 OT
18:45, March 13th N/A 0.463 0.590 0.585 N/A N/A N/A -1.70 OT
17:30, March 13th N/A 0.472 0.600 0.600 N/A N/A N/A -1.70 OT
17:00, March 13th N/A 0.479 0.606 0.600 N/A N/A N/A -1.70 OT
16:45, March 13th N/A 0.479 0.605 N/A N/A N/A N/A -1.70 OT
16:15, March 13th N/A 0.479 0.605 0.600 N/A N/A N/A -1.70 OT
15:00, March 13th N/A 0.474 0.600 0.600 N/A N/A N/A -1.70 OT
14:10, March 13th N/A 0.472 N/A N/A N/A N/A N/A -1.70 OT
13:00, March 13th N/A 0.468 N/A N/A N/A N/A N/A -1.70 OT
12:40, March 13th N/A 0.466 N/A N/A N/A N/A N/A -1.70 OT
11:55, March 13th N/A 0.466 N/A N/A N/A N/A N/A -1.70 OT
11:25, March 13th N/A 0.465 N/A N/A N/A N/A N/A -1.70 OT
10:55, March 13th N/A 0.459 N/A N/A N/A N/A N/A -1.70 OT|
10:35, March 13th N/A 0.483 N/A N/A N/A N/A N/A -1.70 OT
09:55, March 13th N/A 0.454 N/A N/A N/A N/A N/A -1.70 OT
09:25, March 13th N/A 0.454 N/A N/A N/A N/A N/A -1.70 OT
09:10, March 13th N/A 0.459 N/A N/A N/A N/A N/A -1.70 OT
08:20, March 13th N/A 0.459 N/A N/A N/A N/A N/A -1.70 OT
08:00, March 13th N/A 0.454 N/A N/A N/A N/A N/A -1.70 OT
06:00, March 13th N/A 0.62 N/A N/A N/A N/A N/A -1.70 CNIC
02:00, March 13th N/A 0.63 0.58 N/A N/A N/A N/A -1.70 CNIC
01:00, March 13th N/A 0.64 N/A N/A N/A N/A N/A -1.70 CNIC
23:00, March 12th -sea water injection temporarily stopped due to new tsunami risk-----
22:15, March 12th -------strong afterquake---------------------------------------------
20:10, March 12th -starts sea water injection to core and then boric acid subsequently-
19:11, March 12th ---- radiation risk, government has ordered a 20 km evacuation zone -
18:30, March 12th N/A N/A 0.67 N/A N/A N/A N/A -1.65 CNIC
15:36, March 12th -hydrogen explosion tears off roof floor panels and roof collapses---
15:29, March 12th -------------------- radiation at site boundary exceeds limits-------
15:20, March 12th N/A N/A 0.70 N/A N/A N/A N/A -1.65 CNIC
15:00, March 12th - webcam shows vent from exhaust stack unit 1/2,steam going inland --
14:41, March 12th N/A N/A 0.77 N/A N/A N/A N/A -1.55 CNIC
13:38, March 12th N/A N/A 0.77 N/A N/A N/A N/A -1.40 CNIC
12:05, March 12th N/A N/A 0.77 N/A N/A N/A N/A -0.80 CNIC
11:20, March 12th N/A N/A N/A N/A N/A N/A N/A 0.70 CNIC
11:00, March 12th ---implementing a measure to reduce the D/W pressure ----------------
11:00, March 12th ---reactor has been cooled by isolation condenser, it is stopped-----
11:00, March 12th ---pressure in D/W is reported increasing, and water level dropping--
10:04, March 12th N/A N/A 0.76 N/A N/A N/A N/A N/A CNIC
09:20, March 12th N/A N/A N/A N/A N/A N/A N/A -0.65 CNIC
08:45, March 12th N/A N/A 0.76 N/A N/A N/A N/A N/A CNIC
05:20, March 12th N/A N/A 0.87 N/A N/A N/A N/A 0.50 CNIC
02:45, March 12th N/A 0.85 0.87 N/A N/A N/A N/A 0.50 CNIC
00:00, March 12th ---- radiation risk, government has ordered a 3 km evacuation zone --
00:00, March 12th --------- cooling is by isolation condenser -------------------------
22:00, March 11th N/A N/A N/A N/A N/A N/A N/A 0.55 CNIC
17:35, March 11th ----- ECCS started automatically, due to increase in D/W pressure ---
17:32, March 11th --------------------S/C temperature reaches 100 C -------------------
16:36, March 11th -------------------reactor isolation pumps stops, batteries empty----
15:41, March 11th ----------plant has lost all power , including emergency diesel------
14:42, March 11th 7.3 7.3 0.1 0.1 286 286 N/A >1 BWR op. param
14:42, March 11th -------------------earthquake, loss of offsite power-----------------
RP: Reactor pressure
D/W: Drywell pressure
S/C: Suppression chamber(wet-well) pressure
FNT: Feedwater nozzle temperature
BHT: Bottom head temperature
WL: Water level in reactor in meters, relative to fuel top
dscale: below pressure meter scale (less than 0.100 MPa)
uscale: above pressure meter scale (more than 0.400 MPa)
N/A: data not available
Data Source:Tepco
Reactor no 1
Reactor no 2
Reactor no 3
* CNIC gauge press. D/W RP(B) Check Time?
06:00, March 13th 0.62
02:00, March 13th 0.58 0.63
01:00, March 13th 0.64
18:30, March 12th 0.67 N/A