Friday, May 6, 2011

Radiation levels in the unit 2 torus are over double from two days ago

130 Sievert/hr vs 55.8 Sv/hr on Wednesday.  This assumes a reading from within the torus, and that the sensor hasn't malfunctioned somehow. 

It would be helpful to have a radiation reading at a fixed distance outside of, but near the torus. This way, inverse square calculations can be done to determine the dose rate contribution from the torus within unit 2.  It helps narrow down the source of high readings at different locations in the immediate area (reactor vs radioactive air, for example).  In any case, i doubt Tepco guys are willing to even approach the building.

How hazardous is 130 Sv/hr?  At that dose rate, just under 3 minutes of exposure (whole body) results in certain death within a few months time.

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