Nuclear accident at the fukushima dai ichi npp
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Nuclear Accident at the Fukushima Dai-ichi NPP. June 2, 2011 Embassy of Japan in Bulgaria. Japan Faces an Unprecedented Challenge (Enormous Earthquake, Tsunamis and Nuclear Accident). Earthquakes: M - 9.0 quake (March 11) M - 7 class 5 times M - 6 class 72 times

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Nuclear Accident at the Fukushima Dai-ichi NPP

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Nuclear accident at the fukushima dai ichi npp

Nuclear Accidentat the Fukushima Dai-ichi NPP

June 2, 2011

Embassy of Japan in Bulgaria


Nuclear accident at the fukushima dai ichi npp

Japan Faces an Unprecedented Challenge

(Enormous Earthquake, Tsunamis and Nuclear Accident)

Earthquakes: M - 9.0 quake (March 11)

M - 7 class 5 times

M - 6 class 72 times

M - 5 class 423 times

1. Casualties : over 23,000

Fukushima Dai-ichi

TOKYO■

: 15,217

: 8,666

・Dead

・Missing

2. Evacuees : 165,383

(As of May 25th)


Nuclear accident at the fukushima dai ichi npp

Nuclear Reactors near Epicenter of the Earthquake

4 NPP with 14 Units

Periodical

inspection


Nuclear accident at the fukushima dai ichi npp

Fukushima Dai-ichi NPP

Before the Earthquake and Tsunamis

After the Earthquake and Tsunamis

Unit 6

Unit 5

Unit 1

Unit 2

Unit 3

Unit 4

TEPCO

Air Photo Service Inc (Myoko, Niigata Japan)


Nuclear accident at the fukushima dai ichi npp

Fukushima Dai-ichi NPP

Cause of the Damage

Huge Tsunami

Grid Line

46 Meter

①Loss of Off-site Power due to the Earthquake

Reactor

Building

GE Hitachi Nuclear Energy

About

40M

About

20M

Tsunami (estimated 14m)

Turbine

Building

Breakwater

Diesel Generator

5.4 ~5.7m

Elevation:

about 10m

②Diesel Generator Inoperable due to the Tsunami

Seawater level

All Motion Operated Pumps including ECCS became Inoperable

Seawater Pump


Nuclear accident at the fukushima dai ichi npp

Strong support by the international community

  • Information Sharing

  • (1) Japan has been providing facility-related and other relevant information to the IAEA.

  • (2) Nuclear Industry Safety Agency (NISA) provided updates on situations of the

  • Fukushima Dai-ichi Nuclear Power Station at the IAEA Technical Briefing (21st

  • March) and at the side event of the Fifth Review Meeting of the Contract Parties to the

  • Convention on Nuclear Safety (4th April).

  • IAEA Expert Missions

  • (1) The IAEA has extended to Japan upon the request of the Government of Japan, in

  • connection with the incidents involving the nuclear power plants in Japan by

  • dispatching a series of the IAEA experts to Japan mainly in the field of radiation

  • monitoring. Such dispatch of experts includes :

  • (a) Radiation Monitoring Teams, totaling up to 16 members who have been taking

  • measurements mainly in Fukushima since 19 March;

  • (b) onemarine expert from the IAEA’s laboratory in Monaco, who boarded Research

  • Vessel “MIRAI” during 2 -4 April to observe and provide advice for Japanese

  • experts on their method of collection and analysis of seawater samples; and

  • (c) A Joint FAO/IAEA Food Safety Assessment Team, who met with local government

  • officials, farmers etc. in Fukushima, Ibaraki, Tochigi and Gunma prefecture.

  • (2) In addition, IAEA experts in BWR technology met with Japanese officials and

  • operators including NISA and the Tokyo Electric Power Company (TEPCO) and

  • visited the Fukushima Dai-ichi Nuclear Power Plant on 6 April.


Japan s energy policy after nuclear accident in fukushima dai ichi npp

Japan’s energy policy after nuclear accident in Fukushima Dai-ichi NPP

--Japan’s NPP--

Total 54 reactors in 18 NPP

(as of May 10)

17 reactors are generating normally.

・15 reactors suspended by the earthquake.

 ・3 reactors in Hamaoka NPP are asked to stop

generating by the government.

 ・19 reactors are now in regular maintenance

(once a year).


Japan s nuclear energy policy after nuclear accident in fukushima dai ichi npp

Japan’s Nuclear Energy Policy after nuclear accident in Fukushima Dai-ichi NPP

Statement of Prime Minister NAOTO KAN at G8 summit

・drawing on the lessons from the nuclear accidents

---not only the technical aspects, but comprehensively review such aspects as human resources, organizations, institutions as well as safety culture.

→achieve the highest standard of nuclear safety


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