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NISA - Ministry of Economy Trade and Industry (Radiation Report)

Website: http://www.reliefweb.int/rw/rwb.nsf/db900sid/SNAA-8EWQY2/$File/full_report.pdf







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Seismic Damage Information(the 19th Release)
(As of 08:30 March 13, 2011)
Nuclear and Industrial Safety Agency (NISA) confirmed the current
situation of Higashidori and Onagawa NPSs, Tohoku Electric Power Co.,
Inc; Higashidori, Fukushima Dai-ichi, Fukushima Dai-ni and
Kashiwazaki-Kariwa NPSs, Tokyo Electric Power Co., Inc. and electricity,
gas, heat supply and complex as follows:
1. Summary of Damage(Earthquake at Sanriku-Oki)
(1) Time of Occurrence: 14:46 (UTC 5:46) March 11, 2011, Friday
(2) Epicenter: Off-Coast of Sanriku (North Latitude: 38; East Longitude:
142.9), 10km deep, M8.8
(3) Seismic Intensity in Japanese Scale
<Area of Seismic Intensity Larger Than and Including 4>
7: Northern Miyagi Prefecture
6+: Northern and southern Ibaraki Prefecture
5+: Sanpachi-Kamikita Aomori Prefecture
5-: Chuetsu, Niigata Prefecture
<Municipality of Seismic Intensity Larger than and Including 4>
6+: Naraha Machi, Tomioka Machi, Ookuma-machi, and Futaba-machi,
Fukushima Prefecture
6-: Ishinomaki-city and, Onagawa town (by Seismograph of NPP)of ,
Miyagi Prefecture and Tokaimura, Ibaraki Pref.
5-: Kariwa-village, Niigata Prefecture
4: Rokkasho-village, Higashidori-village, Aomori Prefecture,
Kashiwazaki-city, Niigata Prefecture and Yokosuka-city, Kanagawa
Prefecture
1: Tomari-village, Hokkaido
2
2. The status of operation at Power Stations(Number of automatic
shutdown(units): 10 (as of 11:00, March12)
a. Onagawa Nuclear Power Station (Onagawa-machi and Ishinomaki–shi,
Miyagi Prefecture)
(1) The status of operation
Unit 1 (524MWe): automatic shutdown, cold shut down at 0:58, March 12
Unit 2 (825MWe): automatic shutdown
Unit 3 (825MWe): automatic shutdown, cold shut down at 1:17, March 12
(2) Readings of monitoring post
Variation in the monitoring post readings: No
Variation in the main stack monitor readings: No
(3) Report concerning other malfunction
It is confirmed Smoke in the first basement of the Turbine Building was
confirmed the extinguished at 22:55 on March 11th.
b. Fukushima Dai-ichi Nuclear Power Station, Tokyo Electric Power
Co.,Inc.(TEPCO)
(Okuma-machi and Futaba-machi, Futaba-gun, Fukushima Prefecture )
(1) The status of operation
Unit 1 (460MWe): automatic shutdown
Unit 2 (784MWe): automatic shutdown
Unit 3 (784MWe): automatic shutdown
Unit 4(784MW): in periodic inspection outage
Unit 5(784MW): in periodic inspection outage
Unit 6(1,100MW): in periodic inspection outage
(2) Readings at monitoring post
The measurement of radioactive materials in the environmental monitoring
area near the site boundary by a monitoring car confirmed the increase in
the radioactivity compared to the radioactivity at 04:00, March 12 now.
MP4(Moitoring car data at the site boundary, North-west of Unit1):
40microSv/h(03:08, March13)
MP6 (at the main gate) 0.07microSv/h(04:00, March 12) ->
3.1microSv/h(04:50, March13)
3.2microSv/h(05:50, March13)
MP8 (

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