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11/03/2011 Fukushima nuclear plant disaster

3:23

Radiation at Fukushima nuclear plant at unimaginable levels

3:08

Fukushima Nuclear Reactor Problem Explained (CNN)

4:14

A New Source of Fukushima Radiation Was Just Found, Now What?

An earthquake caused the active reactors to shut down their fission cores. Because emergency generators were disabled by the tsunami, reactors were not cooled. This was followed by three nuclear meltdowns and release of radioactive material in 3 units. 37 people were harmed and 2 workers were taken to a hospital.
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    • Essentials 

    • Plant description 

    • Cooling 

    • Backup generators 

    • Zircaloy 

    • Background 

    • Initial effects of earthquake 

    • Arrival of tsunami 

    • Disabling of emergency generators 

    • Hydrogen explosions 

    • Core meltdowns in units 1, 2, and 3 

    • Damage to unit 4 

    • Units 5 and 6 

    • Analysis of the response 

    • Poor communication and delays 

    • 1967: Layout of the emergency-cooling system 

    • 1991: Backup generator of Reactor 1 flooded 

    • 2000 and 2008: Tsunami studies ignored 

    • Vulnerability to earthquakes 

    • Releases of radioactive contamination 

    • Contamination in the eastern Pacific 

    • Event rating 

    • Aftermath 

    • Contaminated water 

    • Risks from ionizing radiation 

    • Thyroid screening program 

    • Effects on evacuees 

    • Radioactivity releases 

    • Insurance 

    • Compensation 

    • Energy policy implications 

    • Equipment, facility, and operational changes 

    • Japan 

    • International 

    • Investigations 

    • Investigation Committee 

    • Video, drawings, and images 

    • Other