Fukushima Daiichi and Daini Nuclear Reactors Status from JAIF: Fuel Rods Partially Exposed, Radiation at Perimeter Up

16 March 2011 Geoff Zeiss

At 8 am Mar 16 JST (07:00:00 p.m. Tuesday March 15 ET) JAIF has issued a status update on the Fukushima Daiichi reactors.

Pressure in Units 1 and 3 is reported stable.  Pressure in Unit 2 is fluctuating.  Most disquieting is the coolant levels in the reactor cores.

  • Unit 1 – fuel rods half exposed
  • Unit 2 – “recovering” after being fully exposed
  • Unit 3 – fuel rods half exposed

Fuel integrity is reported as “damaged” for Units 1,2, and 3.

Containment integrity is reported as not damaged for Units 1 and 3.  Containment integrity for Unit 2 is reported as “damage suspected.”

It reports that a second fire was observed at Unit 4 at 5:45am, which “then disappeared later.”  Water levels in Unit 5 and 6 spent fuel pools are reported to be decreasing.

At 23:35 Mar 15 JST (10:35:00 am Tuesday March 15 ET), the observed radiation at the NPS perimeter was 6308μSv/h, much higher than the last reading (489.8 microSieverts/hr) I reported.  This means that in half an hour, you will get the dosage that you typically get in a year from ambient background radiation.

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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