Fukushima Daiichi: Radioactive element concentrations in seawater near plant rise

TEPCO has reported new radioactive element readings in samples of seawater taken near the Fuksuhima Daiichi nuclear power plant.

Near the water intake of Unit 2 reactor on Friday

  • 260 Bq/cm3 iodine-131 (6,500 times the legal limit)
  • 130 Bq/cm3 of cesium-137 (1,400 times the legal limit)

Near the water intake of Unit 2 reactor on Thursday

  • ~44 Bq/cm3 of iodine-131 (1,100 times the legal limit )

30 kilometers east of the facility on Friday

  • ~0.16 Bq/cm3 iodine-131 (4 times the legal limit)

Previous measurements

Near the water intake of Unit 2 on Tuesday Apr 12 afternoon

  • 100 Bq/cm3 of iodine-131 (2,500 times the legal limit)

Wednesday Apr 6 7:40 am

  • 5,600 Bq/cm3 iodine-131 (140,000 times higher than legal limit)

Tuesday morning Apr 5

  • 11,000 Bq/cm3  of iodine-131 (280,000 times higher than the legal limit

Monday Apr 4 9am

  • 200,000 Bq/cm3 iodine-131 (5 million times the legal limit)
  • ~100,000 Bq/cm3 (1.1 million times the legal limit of cesium 137)

Saturday Apr 2

  • 300,000 Bq/cm3 iodine-131  (7.5 million times the legal limit)

Off-shore survey at 8 sampling points about 30 km east of the plant April 3

  • 5 to 18 Bq/l (0.005 to .018 Bq/cm3) for I-131
  • 1 to 11 Bq/l (0.001 to 0.011 Bq/cm3) for Cs-137

Recorded before the intentional discharge of radioactive water by TEPCO

Geoff Zeiss

Geoff Zeiss

Geoff Zeiss has more than 20 years experience in the geospatial software industry and 15 years experience developing enterprise geospatial solutions for the utilities, communications, and public works industries. His particular interests include the convergence of BIM, CAD, geospatial, and 3D. In recognition of his efforts to evangelize geospatial in vertical industries such as utilities and construction, Geoff received the Geospatial Ambassador Award at Geospatial World Forum 2014. Currently Geoff is Principal at Between the Poles, a thought leadership consulting firm. From 2001 to 2012 Geoff was Director of Utility Industry Program at Autodesk Inc, where he was responsible for thought leadership for the utility industry program. From 1999 to 2001 he was Director of Enterprise Software Development at Autodesk. He received one of ten annual global technology awards in 2004 from Oracle Corporation for technical innovation and leadership in the use of Oracle. Prior to Autodesk Geoff was Director of Product Development at VISION* Solutions. VISION* Solutions is credited with pioneering relational spatial data management, CAD/GIS integration, and long transactions (data versioning) in the utility, communications, and public works industries. Geoff is a frequent speaker at geospatial and utility events around the world including Geospatial World Forum, Where 2.0, MundoGeo Connect (Brazil), Middle East Spatial Geospatial Forum, India Geospatial Forum, Location Intelligence, Asia Geospatial Forum, and GITA events in US, Japan and Australia. Geoff received Speaker Excellence Awards at GITA 2007-2009.

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