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JAEA Reports

Emergency monitoring of environmental radiation and atmospheric radionuclides at Nuclear Science Research Institute, JAEA following the accident of Fukushima Daiichi Nuclear Power Plant

Okura, Takehisa; Oishi, Tetsuya; Taki, Mitsumasa; Shibanuma, Yukio; Kikuchi, Masamitsu; Akino, Hitoshi; Kikuta, Yasuaki; Kawasaki, Masatsugu; Saegusa, Jun; Tsutsumi, Masahiro; et al.

JAEA-Data/Code 2012-010, 37 Pages, 2012/05

JAEA-Data-Code-2012-010.pdf:2.28MB

Due to the accident at Fukushima Daiichi Nuclear Power Plant caused by the 2011 off the Pacific coast of Tohoku Earthquake occurred at 11th March 2011, the emergency environmental radiation monitoring was conducted at Nuclear Science Research Institute, Japan Atomic Energy Agency (JAEA). This report provides the monitoring results of ambient $$gamma$$-ray dose rate and atmospheric radioactivity concentration until the beginning of June 2011. Some anthropogenic radionuclides such as Cs-134, Cs-137, I-131, I-132, Te-132, Xe-133 and others were detected from air samples. The atmospheric radioactivity concentrations varied with some peaks corresponded with that of ambient $$gamma$$-ray dose rate after 15th March 2011. Composition of each peak showed various characteristic. Internal exposure caused by inhalation was estimated from the observed atmospheric radioactivity.

JAEA Reports

A Development of a database system for the released radioactive gases and liquid from the nuclear facilities

Kikuchi, Masamitsu; Taki, Mitsumasa; Kume, Etsuo; Kobayashi, Hideo*; Yamada, Toshio*; Yamaguchi, Takenori

JAERI-Data/Code 2004-006, 146 Pages, 2004/03

JAERI-Data-Code-2004-006.pdf:6.87MB

The nuclear facilities, which are required to control the released radioactive gases and liquid, exist in Tokai research establishment as much as 40. These radioactive controls are carried out complying with the statutes in each facility. The released radioactivity data of each facility must be reported to MEXT and Ibaraki Prefecture from Tokai Research Establishment. This system is developed to make the database gathering the radioactivity data of each facilities for unitary control as Tokai Research Establishment and contribute to make the reports to MEXT and Ibaraki Prefecture.

JAEA Reports

Dose evaluation with ICRP Publication 60 at postulated accidents of NSRR, 2003

Kashima, Yoichi; Taki, Mitsumasa; Kikuchi, Masamitsu; Sasajima, Hideo; Nakamura, Takehiko

JAERI-Tech 2003-088, 100 Pages, 2003/12

JAERI-Tech-2003-088.pdf:5.55MB

A new experiment plan is in progress to perform pulse-irradiation experiments at the NSRR with irradiated fuel rods in the high temperature and high pressure capsules. This report describes the results of the public dose evaluation for the design basis accident and postulated accidents with the models that follow the ICRP Publication 60. It was confirmed that the results met the criteria for safety design and siting with ample margins.

JAEA Reports

Development of Environmental Dose Assessment System (EDAS) code for PC version

Taki, Mitsumasa; Kikuchi, Masamitsu; Kobayashi, Hideo*; Yamaguchi, Takenori

JAERI-Data/Code 2003-006, 99 Pages, 2003/05

JAERI-Data-Code-2003-006.pdf:6.97MB

A computer code (EDAS) was developed to assess the public dose for the safety assessment to get the license of nuclear reactor operation. This code system is used for the safety analysis of public around the nuclear reactor in case of normal operation and severe accident. This code was revised and composed for personal computer user according to the Nuclear Safety Guidelines reflected the ICRP1990 recommendation. These guidelines are revised by Nuclear Safety Commission on March, 2001, which are “Weather analysis guideline for the safety assessment of nuclear power reactor", “ Public dose around the facility assessment guideline corresponding to the objective value for nuclear power light water reactor" and “Public dose assessment guideline for safety review of nuclear power light water reactor". This code has been already opened for public user by JAERI, and English version code and user manual are prepared moreover. This English version code is helpful for international cooperation concerning the nuclear safety assessment with JAERI.

Journal Articles

A Simple correction method of coincidence-sum effect for $$gamma$$-ray spectrometry with germanium detectors

*; Yoshida, Makoto; Oi, Yoshihiro; Taki, Mitsumasa; Manabe, Iwao

Radioisotopes, 48(11), p.32 - 36, 1999/11

no abstracts in English

Journal Articles

Evaluation of peak-to-total ratio for germanium detectors

*; Oi, Yoshihiro; Taki, Mitsumasa; Kawasaki, Katsuya; Yoshida, Makoto

Applied Radiation and Isotopes, 50(6), p.1057 - 1061, 1999/00

 Times Cited Count:6 Percentile:46.15(Chemistry, Inorganic & Nuclear)

no abstracts in English

JAEA Reports

Characteristics of prepared gamma-ray calibration sources for radioactivity measurement of environmental and radiaiton control samples

S.B.Samat*; Oi, Yoshihiro; Taki, Mitsumasa; ; Yoshida, Makoto; Minami, Kentaro

JAERI-Tech 95-010, 51 Pages, 1995/03

JAERI-Tech-95-010.pdf:1.76MB

no abstracts in English

JAEA Reports

Isopleths of surface air concentration and surface air absorbed dose rate due to a radioactive cloud released from a stack, II

Taki, Mitsumasa; Kobayashi, Hideo; Suzuki, Takashi; Shimizu, Isamu

JAERI-M 90-206, 345 Pages, 1990/11

JAERI-M-90-206.pdf:8.25MB

no abstracts in English

Oral presentation

Environmental radiation monitoring system of Nuclear Science Research Institute, JAEA

Taki, Mitsumasa; Okura, Takehisa; Oishi, Tetsuya

no journal, , 

no abstracts in English

Oral presentation

Widening of isopleths for air concentration and air kerma rate calculated using Gaussian plume model

Kawasaki, Masatsugu; Omori, Shuhei; Taki, Mitsumasa; Oishi, Tetsuya

no journal, , 

no abstracts in English

10 (Records 1-10 displayed on this page)
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