Fukushima Daiichi Radiation Spike Likely Due to Unit 2 Radiation Leak

16 March 2011 Geoff Zeiss

It has been suspected for some time that the explosion at Unit 2 may have damaged the containment vessel.

According to NHK, NISA says a possible radiation leak from the Number Two reactor may have caused the sharp increase in radiation levels.  NISA said that the level of radiation near the plant’s main gate rose to 10 millisieverts per hour at 10:40 AM, but dropped to 2.7 millisieverts per hour within 30 minutes.  The agency said the radiation increase prompted workers at the plant to temporarily evacuate. 

The agency also said TEPCO suspects that the increase was caused by the Unit 2 reactor. The reactor’s pressure control facility, called the suppression pool, has been damaged.

The current dosage maximum for a worker is 250 millisieverts. 

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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