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How have we come to suspect?

Investigation of The Accuracy of the Radiation Monitoring Posts placed in Fukushima Prefecture by the Japanese Government. How have we come to suspect?. We have found that the dose values ( Sv /hr) on the official monitors were lower than the values obtained by other instruments.

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How have we come to suspect?

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  1. Investigation of The Accuracy of the Radiation Monitoring Posts placed in Fukushima Prefecture by the Japanese Government

  2. How have we come to suspect? • We have found that the dose values (Sv/hr) on the official monitors were lower than the values obtained by other instruments. • We suspected that the dose values on the monitors may be made artificially lower than the true values. • We have found that the vicinity of monitors is usually cleaned and decontaminated (intentionally or unintentionally), or that a metallic plate is placed under the monitor. We decided to investigate it ourselves.

  3. Monitoring Posts(there are two different types) Movable Type Real time Dosimeter

  4. Data to verify the monitors • In the following figures: • (A) is the reading on the monitor • (B) reading on our meter (Aloka….), when it was placed as close as the monitor • (C) reading on our meter at 2 m from the monitor (at 1 m high above ground) • (D) reading on our meter at 5 m from the monitor • (E) the average of readings on our meter 1 m above soil exposed ground within 15 m from the monitor. • Our meter is Aloka……., and its accuracy has been verified comparing with several different instruments.

  5. The figures on the next two slides • In both of these figures, the names at the bottom (in Japanese) are the locations of monitors. • The data shown are the relative values of the actual readings under several different conditions (as shown in (B)-(E) above) to those on the monitors (A), expressed in %. • The First figure is of the city of Minami-Soma • The second is of the city of Koriyama • These figures indicate that people may actually be exposed to radiation as high as 5 times of the monitor’s value.

  6. Spatial dose rate as of Sept. 26, 2012(published by Ministry of Science and Education) We’ve observed often higher than 2 mm Sv/hr in Koriyama-shi.

  7. Conclusion • Our investigation has shown that: • The officially set monitors do not necessarily show accurately the real dose rate, for several reasons. One important factor is that the vicinity of a monitor is usually cleaned and decontaminated so that it does not reflect the dose just outside of the cleaned area, where people actually live. (2) It seems that the government is intent on making the level of contamination look lower than the real value in many different ways. (3) This attitude of government would jeopardize the people’s lives; this is clearly a violation of the basic human rights.

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