Analysis of meteorological observation data for the atmospheric diffusion calculation; FY2005-2015

Nishimura, Tomohiro; Onuma, Toshimitsu*; Mizutani, Tomoko; Nakano, Masanao

JAEA-Technology 2017-019, 60 Pages, 2017/09

JAEA-Technology-2017-019.pdf:3.2MB

The meteorological observation has been performed since 1969's in the Nuclear Fuel Cycle Engineering Laboratories, JAEA after 1974. The meteorological observation data has been applied for the calculation of the atmospheric diffusion of radioactive wastes since the hot run was started 1977. This report presents statistical results of meteorological observation based on the decadal data from fiscal year 2005 to 2015. The characteristics of atmospheric diffusion related to the meteorological parameter are also discussed in this report.

Analysis of meteorological observation data for the atmosphere diffusion calculation

; ; ; ; Kano, Yutaka

PNC TN8420 96-017, 50 Pages, 1996/08

PNC-TN8420-96-017.pdf:2.16MB

The meteorological observation has been performed since 1955 in PNC Tokai-works. After 1974, this observation came to measure on the top of the meteorological tower (100m above sea level) for the environmental assessment of a radioactive waste with the atmospheric discharge from the reprocessing plant. This report presents an atmospheric phenomenon statistic result and an examination about a characteristic of the atmosphere diffusion based on the data from 1977 to 1995. Characteristics of the result are as follows; (1)It was confirmed that the maximum air concentration point that was calculated based on the discharge amount from reprocessing plant and atmospheric phenomenon statistic of each year appears at near point in the safety assessment of 1977. (2)In some case, a maximum concentration point has appeared at about 800m in the west-southwest direction owing to the deference of appearance frequency of the atmospheric stability, etc. Normally it appears at about 2,000m point in south-west direction. Still, as reference materials, atmospheric phenomenon statistics result and relative concentration were mentioned.

Development of an estimation method of concentration distribution and release amount of radionuclide discharged to the atmosphere using gamma-ray imaging, 1; Outline of study

Nagai, Haruyasu; Tanimori, Toru*; Nakayama, Hiromasa; Satoh, Daiki; Furuta, Yoshihiro

no journal, , 

no abstracts in English