Fukushima Daiichi: Sea water radiation measurements taken prior to authorized release of contaminated water continue to decline

5 April 2011 Geoff Zeiss

The IAEA has reported new radiation measurements for sea water sampled near the plant.

Seawater is collected daily close to the discharge areas of Units 1 – 4 

April 3

  • 24 kBq/l for I-131
  • 10 kBq/l for both Cs-134 and Cs-137

Apri 1 

  • 66 kBq/l for I-131
  • 21 kBq/l for both Cs-134 and Cs-137

Units 5 and 6

  • Decreasing trend until 3 April.

These values were measured before the discharge of low level contaminated water authorized by the Japanese Government on the 4th April.

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

  • 5 to 18 Bq/l for I-131
  • 1 to 11 Bq/l for Cs-137.

Coastal transect in the south, about 35 km south of Fukushima Daiini

  • 38 Bq/l for I-131 and 4.5 Bq/l for Cs-137 – highest concentrations which were detected at the sampling point closest to the coast in the south
  • The concentrations at all sampling points have decreased over time.

 

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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