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Toyama, Shigeyuki*; Wakamatsu, Hisanori; Okazaki, Hikoya
JNC TJ7440 2000-019, 17 Pages, 2000/03
JNC-TJ7440-2000-019.pdf:1.95MB
no abstracts in English
Toyama, Shigeyuki*; Wakamatsu, Hisanori; Okazaki, Hikoya
JNC TJ7440 99-031, 22 Pages, 1999/09
no abstracts in English
; ; ; ; Kano, Yutaka
PNC TN8420 96-017, 50 Pages, 1996/08
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.
; Yamazawa, Hiromi
Journal of Nuclear Science and Technology, 32(7), p.671 - 682, 1995/07
Times Cited Count：4 Percentile：43.19(Nuclear Science & Technology)no abstracts in English
Narita, Osamu; Muto, Shigeo; ; Kano, Yutaka;
PNC TN8420 94-017, 91 Pages, 1994/06
We enforce weather observation at PNC Tokai Works from 1960's. We have been equipping with weather observation devices and tower from around 1974, for the purpose of environment influence evaluation resulted from radioactive waste which is discharged the atmosphere uses from reprocessing plant. Weather data observed before now are utilize for several kinds of classification way of atmospheric stability. So we compared them with a tendency of frequency distribution of atmospheric stability using each classification way. A tendency of frequency distribution of way using lapse late alone are different from one of way using weather regulatory guide classification. But a similar tendency was looked at frequency distribution of way using weather regulatory guide classification and one of way using wind speed combined with lapse late. we analized and compared with each classification way of atmospheric stability on the basis of a large quantity data observed for 10 years and we grasped a characteristic of classification way and observation site. The lapse late observation that is observed for the purpose of reference to diffusion parameter estimate and other weather observations with the view of investigation of atmospheric stability accomplished their objects. And we conclude that thier weather observation wound up for the resent.
; ; ; ; ; Kano, Yutaka; Yoshida, Mika
PNC TN8440 94-003, 157 Pages, 1994/03
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed since 1975, based on "Safety Regulations for the Tokai Reprocessing Plant, Chapter VII - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitants due to the radioactivity discharged from the plant during 1993. Appendices present comprehensive information, such as monitoring program, monitoring results, meteorological data and annual discharges from the plant.
Yamazawa, Hiromi;
JAERI-M 93-118, 96 Pages, 1993/06
no abstracts in English
; Maruo, Yoshihiro; ; ; ; Kano, Yutaka; Sumiya, Shuichi
PNC TN8440 92-007, 161 Pages, 1992/03
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed since 1975, based on "Safety Regulations for the Tokai Reprocessing Plant. Chapter VII - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitants due to the radioactivity discharged from the plant during 1991. Appendices present comprehensive information, such as monitoring program, monitoring results, meteorological data and annual discharges from the plant.
Sumiya, Shuichi; Maruo, Yoshihiro; ; ; ; ; Kano, Yutaka
PNC TN8440 91-015, 143 Pages, 1991/03
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed since 1975, based on "Safety Regulations for the Tokai Reprocessing Plant, Chapter VII - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitants due to the radioactivity discharged from the plant during 1990. Appendices present comprehensive information, such as monitoring program, monitoring results, meteorological data, annual discharges from the plant and details of the dose estimation.
; Ishida, Junichiro; ; Takeishi, Minoru
PNC TN9450 91-006, 30 Pages, 1981/08
Exposure of the public around O-arai Engineering Center (OEC) is estimated in two cases at the ordinary operation and at the postulated accidentsby using the observed meteorological data at OEC. The calculations are done based on the 'Meteorological Guide for Safety Analysis of Nuclear Power Plants' prepared by the Nuclear Safety Commission. According to the guide, the sum of the inverse of wind speed for every direction, atmospheric stability and so on should be used to calculate annual mean concentration of radioactive materials for dose estimation. Health and Safety Division in OEC has been observing wind speed, wind direction, insolation, net radiation and vertical temperature difference. These meteorological data from 1980 t0 1988 are reviewed statistically. The main conclusions of this study are as follows; (1)As the results of examination, the maximun deviation of the observation data at each year is 16 % from the average. The 16 % is within 30 % which is presented in 'Meteorological Guide for Safety Analysis of Nuclear Power Plants'. Therefore it is judged that there is no unusual data between 1980 and 1988. (2)The specific results on the data at 80 meters height are as follows; (a)Average of the most occurance frequencies of wind direction at each year is l8% for the wind from north east. (b)Range of the most occurance frequencies of wind speeds at each year is 5.0
5.9 m/s for the wind from north east. (c)The most occurance atmospheric stability for the wind from north east is D type, whose frequency is about 65%. (3)Average of 'the maximum of annual mean air concentration' around OEC is 4.7
10
Bq/cm
, and average of 'the maximum effective dose equivalent is 6.910
Sv/Y, which are based on the caluculations by assuming the release of one Bq per year.
JAERI-M 4657, 33 Pages, 1971/12
no abstracts in English
JAERI-M 4656, 31 Pages, 1971/12
no abstracts in English
