Meteorological aspects of gamma-ray glows in winter thunderstorms

Wada, Yuki*; Enoto, Teruaki*; Kubo, Mamoru*; Nakazawa, Kazuhiro*; Shinoda, Taro*; Yonetoku, Daisuke*; Sawano, Tatsuya*; Yuasa, Takayuki*; Ushio, Tomoo*; Sato, Yosuke*; et al.

Geophysical Research Letters, 48(7), 11 Pages, 2021/04

https://doi.org/10.1029/2020GL091910

During three winter seasons from November 2016 to March 2019, 11 gamma-ray glows were detected at a single observation site of our ground-based gamma-ray monitoring network in Kanazawa, Japan. These events are analyzed with observations of an X-band radar network, a ceilometer, a disdrometer, and a weather monitor. All the detected glows were connected to convective high-reflectivity regions of more than 35 dBZ, developed up to an altitude of 2 km. They were also accompanied by heavy precipitation of graupels. Therefore, graupels in the lower layer of thunderclouds that correspond to high-reflectivity regions can form strong electric fields producing gamma-ray glows. Also, these events are compared with a limited sample of nondetection cases, but no significant differences in meteorological conditions were found between detection and nondetection cases in the present study.

Statistics of meteorological data at Tokai Research Establishment in JAERI

Sekita, Tsutomu; Tachibana, Haruo; Matsuura, Kenichi; Yamaguchi, Takenori

JAERI-Data/Code 2003-017, 106 Pages, 2003/12

JAERI-Data-Code-2003-017.pdf:5.32MB

The meteorological observation data at Tokai site were analyzed statistically based on a "Guideline of meteorological statistics for the safety analysis of nuclear power reactor" (Nuclear Safety Commission on January 28,1982; revised on March 29, 2001). This report shows the meteorological analysis of wind direction, wind velocity and atmospheric stability etc. to assess the public dose around the Tokai site caused by the released gaseous radioactivity. The statistical period of meteorological data is every 5 years from 1981 to 1995.

Annual report on the environmental radiation monitoring around Tokai reprocessing plant FY 1999

; Shinohara, Kunihiko; ; ; ; Takeyasu, Masanori;

JNC TN8440 2000-007, 141 Pages, 2000/06

JNC-TN8440-2000-007.pdf:3.02MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed since 1975, based on "Safety Regulations for the Tokai Reprocessing Plant, Chapter IV - 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 April 1999 to March 2000. Appendices present comprehensive information, such as monitoring program, monitoring results, meteorological data and annual discharges from the plant.

None

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

Installation of Subsurface Hydrological Monitoring System in Regional Hydrogeological Study

Toyama, Shigeyuki*; Wakamatsu, Hisanori; Okazaki, Hikoya

JNC TJ7440 99-031, 22 Pages, 1999/09

JNC-TJ7440-99-031.pdf:6.36MB

no abstracts in English

Data of atmospheric diffusion experiments (Tsukuba, 1989)

Hayashi, Takashi; Chino, Masamichi; Yamazawa, Hiromi; Moriuchi, Shigeru*; Ishikawa, Hirohiko*; Adachi, Takashi*; Kojima, Hiromi*

JAERI-Data/Code 99-036, 322 Pages, 1999/08

JAERI-Data-Code-99-036.pdf:14.37MB

no abstracts in English

Data of long term atmospheric diffusion experiments; Summer, 1992

Hayashi, Takashi; Chino, Masamichi; Yamazawa, Hiromi; Nagai, Haruyasu; Moriuchi, Shigeru*; Ishikawa, Hirohiko*; Adachi, Takashi*; Okano, Hiroshi*; Kojima, Hiromi*; Odagawa, Fumiaki*

JAERI-Data/Code 98-028, 282 Pages, 1998/10

JAERI-Data-Code-98-028.pdf:14.47MB

no abstracts in English

Data of long term atmospheric diffusion experiments; Autumn, 1991

Hayashi, Takashi; Chino, Masamichi; Yamazawa, Hiromi; Nagai, Haruyasu; Moriuchi, Shigeru*; Ishikawa, Hirohiko*; Adachi, Takashi*; Okano, Hiroshi*; Kojima, Hiromi*; Odagawa, Fumiaki*

JAERI-Data/Code 98-026, 347 Pages, 1998/10

JAERI-Data-Code-98-026.pdf:16.47MB

no abstracts in English

Utilization of mesoscale atmospheric dynamic model PHYSIC as a meteorological forecast model in nuclear emergency response system

; Yamazawa, Hiromi

Journal of Nuclear Science and Technology, 34(8), p.835 - 846, 1997/08

https://doi.org/10.3327/jnst.34.835

no abstracts in English

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.