Technical Assessment of Environmental Contamination From the - PowerPoint PPT Presentation

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Technical Assessment of Environmental Contamination From the Fukushima Dai-ichi Reactors September 11, 2012 Stephen V. Musolino, Ph.D. Certified Health Physicist Health Physics Society Representative 1 80 km 2 Government of Japan

Technical Assessment of Environmental Contamination From the Fukushima Dai-ichi Reactors September 11, 2012 Stephen V. Musolino, Ph.D. Certified Health Physicist Health Physics Society Representative 1
80 km 2
Government of Japan Replicated Joint Aerial Measuring Results with Soil Samples 3
Deposition Map From Soil Samples 2,200 Locations 5 points per locations Preparation of Distribution Map of Radiation Doses, etc., (Map of Radioactive Cesium Concentration in Soil) by MEXT, August 30, 2011 4
Chernobyl Cs-137 Deposition 90 km 5
Chernobyl Cs-137 Deposition 398k 63095 10000 1585 251 40 6.3 1 .16 Color scale not the same as Joint US-Japan and GOJ products 6
Effects of Terrain 7 Results of Airborne Monitoring Survey by MEXT in Aichi, Aomori, Ishikawa, and Fukui Prefectures, November 25, 2011
Extent of Contamination Ariel survey as of November 11, 2011 Dose Rate Total Cesium 450 450 350 350 250 250 150 150 8 Results of Airborne Monitoring Survey by MEXT in Aichi, Aomori, Ishikawa, and Fukui Prefectures, November 25, 2011
Isotopic Mix Consistent for 134,137 Cs 9
Air Filters (DOE) 10 N. Wimer Lawrence Livermore National Laboratory
Soil Samples (DOE) 11 N. Wimer Lawrence Livermore National Laboratory
Refractory Material Not Detected 12
Refractory Material Not Detected • Trace amounts of 89, 90 Sr detected in DOE soil samples • 103 Ru not detected in DOE in situ gamma spectroscopy • Plutonium 238 Pu, 239, 240 Pu not detected in soil samples by MEXT ‡ – Uranium detected in the samples naturally occurring 235 U/ 238 U ratio Boiling Point °C Cs – 671 Sr – 1384 Zircaloy – 1850 Pu – 3235 Ru – 4150 13 ‡ “Readings of Pu&U at Monitoring Post out of 20&30 Km Zone of Fukushima Dai-ichi NPP”, MEXT, April 1, 2011
89,90 Sr in Soil and Vegetation (GOJ) Analysis by MEXT 14
GOJ Evacuation as of August 2012 15 IAEA Fukushima Dai-ichi Status Report, 31 August 2012

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