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Monday, 4 November 2013

New Fukushima Radiation Release Estimates Compiled

Excellent compilation and graphs @

The findings indicate that Fukushima is worse than Chernobyl and that the releases are 80% of entire potential already......


Fukushima Radiation Release Estimates
This is one of the questions we are asked the most, “how much radiation was released from Fukushima”. Many of the estimates out there are old initial estimates of the meltdown phase and do not include radiation releases over the years.
In our effort to answer this question we found a wide variety of research and estimates. With time researchers were able to use other tools and testing to create a better idea about how much has been released.
These estimate ranges are presented to give an idea of the broad range of official estimates and are not a specific scientific study. What these widely divergent estimates show is that there is a need for more honest and accurate study of this issue.

Fukushima Vs. Chernobyl
We looked at these two disasters since they are frequently compared to each other. The extremely high levels, all in petabecquerels are problematic even if there is a considerable difference between the two.
Fukushima Releases To The Air
These numbers were established by using the range of estimates that were either “all radiation”  or at least included cesium 137 and iodine 131 for the initial phase of the disaster. The estimates for the years following the accident are based on TEPCO’s admitted hourly release rates. These totals are for the time period through December 12, 2013
Air high:   16886 Pbq
Air low:         900 Pbq
Fukushima Releases To The Sea
These numbers include initial releases and also over time releases based on oceanography institute estimates. These totals are for the time period through December 12, 2013
Sea high:     960 Pbq
Sea low:       520 Pbq
*does not include radiation that escaped via air but fell into the sea or that washed out to sea via rivers.

Fukushima Combined Releases To Sea & Air
Combined high: 17846 Pbq (74.5% of total inventory at the plant)
Combined low:     1420 Pbq (5.9% of total inventory at the plant)
Chernobyl Release Estimates
The release estimates provided by UNSCEAR were used for comparison.
Air:               8385 Pbq
Sea:                 20 Pbq
Combined:  8405 Pbq
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Full article and graphs:

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