IAEAInternational Atomic Energy Agency

Technical Briefing of nuclear safety aspects of the situation in Japan

James E. LyonsDirector Nuclear Installation Safety, IAEA

March 20th 2011

IAEA

Fukushima Daiichi Unit-3 Reactor Vessel and Containment Vessel Pressure

Main Steam Line

Safety Relief Valve

IAEA

Fukushima Daiichi Units 5 and 6 Spent Fuel Pool Water Temperature

Mar/14 00:00 Mar/15 00:00 Mar/16 00:00 Mar/17 00:00 Mar/18 00:00 Mar/19 00:00 Mar/20 00:00 Mar/21 00:0020

30

40

50

60

70

80

90

100

Fukushima Daiichi Units 5 and 6 Spent Fuel Pool Water Temperature

U-5 Spent Fuel pool temp. (C) U-6 Spent Fuel pool temp. (C)

deg

C

IAEA

Fukushima Daini Status

IAEA12 MAR 2011, 10:38am local timeContains DigitalGlobe Copyrighted Materials

Reactor Unit 3

Reactor Unit 4

Reactor Unit 1

Waste disposal

Low level solid waste

Barrier defenses partially destroyed

No cooling water discharge

No cooling water discharge

FUKUSHIMA DAINI

Reactor Unit 2

IAEA12 MAR 201108 NOV 2010

FUKUSHIMA DAINI

Contains DIGITALGLOBE Copyrighted Materials

IAEAWater intake system support infrastructure destroyed

FUKUSHIMA DAINI

12 MAR 2011Contains DIGITALGLOBE Copyrighted Materials

IAEA

10x emergency response vehicles

Reactor Unit 1 Reactor Unit 2

FUKUSHIMA DAINI

12 MAR 2011Contains DIGITALGLOBE Copyrighted Materials

IAEA

FUKUSHIMA DAINI

19 MAR 2011Contains DIGITALGLOBE Copyrighted Materials

Reactor Unit 1

Reactor Unit 2

Reactor Unit 3

Reactor Unit 4

IAEA

FUKUSHIMA DAINI

19 MAR 2011Contains DIGITALGLOBE Copyrighted Materials

Unit 1, Possible emergency response vehicles still present

Reactor Unit 1