I was measuring radiation mainly at 1 meter away from the ground in the city area of Fukushima City in Fukushima Prefecture. The intention of this video showing the circumstances of radiation level in Fukushima City.
Basically, All the readings on the title and description was referred from White counter called Horiba Radi PA1000.
First, I started at Fukushima Station(0.130-0.190μSv/h) and going through the city area(0.300-0.800μSv/h) then destination was riverside of Abukuma river. And measured at chest height(1.330μSv/h)the soil directly(2.300μSv/h).
I didn't intend to go to a hot spot and measure radiation.
I used two radiation counters for measurement. The Orange one is called "Gamma Scout" which is a geiger counter. The White one is called "Horiba Radi PA1000 which is a scintillation counter.
I guess the major difference of those counters at this case of measurement is the speed of "calculation" of radiation. The Orange one seems to indicate instantaneous value of reading which means it calculates faster than "Horiba" but if I want read the average readings, I should wait for 1 or 2 minutes.
Horiba calculates radiation readings in the past 10 seconds or something. That's why reading is pretty accurate and stable. And it is easy to read.
But either of counter isn't appropriate to calculate radiation while walking. The best way of calculation is to stop for 1 or 2 minutes and read the value of radiation. (At least 35 sec for Horiba).
So my intention of this video is to prove Radiation level in Fukushima is obviously high. Obviously all the places I measured were exceeding 1mSv/year. (According to Ministry of the Environment, the way of calculation of 1mSv/year is 0.23 micro sievert per hour area at 1 meter away from the ground.) Even though the measurement was not super accurate.
Specification of Radiation counter (White One)
: scintillation type which reads Gamma Ray only
: calibration certificate is valid
Radiation counter is called "Horiba Radi PA1000.
I personally did cross-check with a professional scintillation counter called NHC6 or NHC7 for two minutes and it seemed reading was as accurate as that.
Here is the link of the counter.
http://www.fujielectric.com/products/...
Specification of radiation counter (Orange one)
:The name of counter is called Gamma Scout.
:The type of the counter is geiger counter.
:There are three modes of measuring radiation.
The one is only reading Gamma ray mode.
The other one is reading Beta particle(beta ray) and Gamma ray.
The other one is reading Alpha Particle(Alpha ray), Beta particle(beta ray) and Gamma Ray.
Fukushima City 11/Mar/2013 Radiation level at chest height Max1.330μSv/h Min0.130μSv/h camera iphone 8 plus apk | |
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| Non-profits & Activism | Upload TimePublished on 23 Sep 2013 |
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