Tatsuya SUZUKKI
Analysis the of wind direction and speed by AMeDAS Data for 10 minutes
- Anticipation of radioactive contamination diffusion-
Yasuyuki MIYAKI
When a nuclear power plant disaster occurs, although radioactive diffusion anticipated by SPEEDI. The local governments of the nuclear power plant circumference thought it possible to look out to an accident using the wind.
So, I performed the anticipation of radioactive contamination which used the AMeDAS data for 10 minutes. For, the AMeDAS data is excellent in statistics.
At first, I analyzed the wind direction and speed around Fukushima Daiichi Nuclear Power Plant. As a result, the wind direction does not almost have significant difference for every year. And, I judged that the pollution diffusion after the 3.11 could be expected by past AMeDAS data.
Based on this result, when prevailing winds blew at the Hirono¡Çs observation point where the nearest to the nuclear power plant, I showed the wind direction at all the observation points in the Fukushima.
As a result, there was no big difference in a wind direction and a pollution situation. Therefore, I thought this anticipation is useful enough to the cautions to the local governments around Fukushima Daiichi Nuclear Power Plant.
Next, radioactive diffusion anticipated in the Niigata Kashiwazaki £Îuclear £Ðower £Ðlant. The method is the same as Fukushima¡Çs method. As a result, whenever prevailing winds blow, contaminants will be hard to spread on Kaetsu, and be easy to concentrate contamination on Chuetsu. And, it turned out that the diffusion of contaminants is expected on Joetsu too.
As a future subject, this required in use the wind speed, and in use the time lag between observation points.
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