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Risk Assessment Fukushima

MARITIME AFFAIRS. Risk Assessment Fukushima. Marine Observation and Data Expert Group. DG MARE Iain Shepherd. 12 October 2011. Tsunami 11 March 2011. Killed 20,000 people Destroyed 25,000 fishing boats 300 fishing ports The livelihoods of 70,000 people. and then came a nuclear accident.

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Risk Assessment Fukushima

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  1. MARITIMEAFFAIRS Risk Assessment Fukushima Marine Observation and Data Expert Group DG MARE Iain Shepherd 12 October 2011

  2. Tsunami 11 March 2011 • Killed 20,000 people • Destroyed • 25,000 fishing boats • 300 fishing ports • The livelihoods of 70,000 people and then came a nuclear accident

  3. Sampling a) c) e) b) d) （C）JAMSTEC Main sampling location • Front of NPP site (By TEPCO) • Near(~20km) site (By TEPCO) • About 30 km from site (By JAMSTEC) • Neighbor prefecture (by MERI) • (~150kmnorth and south from NPP) • Deep sea (by JAMSTEC & FRA) 3

  4. Release • Radionuclides were released into the ocean both directly and by atmospheric deposition.. • iodine 131 no longer of radiological significance, • no agreement as to the total caesium 137 and 134 released. • The Japanese Atomic Energy Agency estimated 16 petabequerels (PBq) of • French IRSN estimated 52PBq of 137Cs alone. • The JAEA estimated a release of about 36 Pbq of each caesium isotope into the atmosphere • Roughly 10% of what was released during 1960s bomb tests

  5. Simulations by Japan, Mercator, Sirocco NCOM surf. current MERCATOR surf. current

  6. No fishing in Fukushima No bottom trawling in Ibaraki

  7. Sample 20% from all of Japan 10% from affected prefectures 694 samples Only contamination in green tea

  8. 216 samples • No contamination above 10 Bq/kg

  9. Date (mm/dd/yy)

  10. conclusion • Onlyu check migratory pelagic fish caught inside zone 61 • Only check albacore, bluefin, skipjack, swordfish and yellowfin. • Keep watch on Japanese monitoring of these species sampled inside the Fukushima prefecture

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