Briefing on the Fukushima Nuclear Disaster and Radioactivity

Briefing on the Fukushima Nuclear Disaster and Radioactivity in California Energy, Ocean Resources and Federal Consistency Unit California Coastal Commission Item F 10 b May 16, 2014 1

Tohoku Earthquake & Tsunami Source: California Dept. of Conservation Source: U. S. Geological Survey 2 Source: U. S. Environmental Protection Agency

Radiation Release at Fukushima Dai-ichi Nuclear Power Plant Plume of smoke and steam from damaged reactors, March 14, 2011 (Source: National Geographic Daily News) Fukushima Dai-ichi NPP prior to the disaster (Source: TEPCO) 3 Fukushima Dai-ichi Reactor #3 after the accident (Source: TEPCO)

Rapid Dispersal of Fukushima Radiation in the Atmosphere 4 After 36 hrs After 7 days After 13 days After 19 days Model Simulation – Iodine-131 Source: Ten Hoeve & Jacobson (2012)

Slow Dispersal of Fukushima Radiation in the North Pacific 5 2012 2014 2016 2021 Model Simulation – cesium-137 Source: Rossi et al. (2013)

Ocean Monitoring – Citizen Science Efforts Center for Marine & Environmental Radioactivity Ø Ocean water monitoring Ø Volunteer network Ø Sponsored sampling sites http: //www. ourradioactiveocean. org/ Kelp. Watch Ø Ø Kelp testing CSU Long Beach, UC Berkeley Volunteer network USC Sea Grant, CSU funding http: //kelpwatch. berkeley. edu/ Source: Center for Marine and Environmental Radioactivity, WHOI http: //www. ourradioactiveocean. org/results. html 6

Range of Fukushimarelated doses in California (multiple sources – see written report) Comparative Radiation Doses 7

Fukushima Radiation in Perspective Source: Buessler (2014) 8