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Kowatari, Munehiko; Kubota, Takumi*; Shibahara, Yuji*; Fujii, Toshiyuki*; Takamiya, Koichi*; Mizuno, Satoshi*; Yamana, Hajimu*
no journal, ,
Instead of conventional Ge semiconductor detectors and NaI(Tl) scintillation spectrometers, an application of a CZT whose crystal has the dimension of 1 cm cubic semiconductor to the in-situ environmental radio-activity measurement was attempted in deeply affected areas in Fukushima region. A CZT detector does not have such a high resolution of peaks, comparing a Ge detector. However, it is found that a CZT has enough characteristics to properly determine radio-activity of 
Cs and 
Cs in soil, throughout the in-situ measurement campaign in deeply affected area within 5 km from the Fukushima Dai-ichi Nuclear Power Plant, where dose rates exceed 50 
Sv h
. Results of radioactivity concentration in soil ranged between 1 and 500 kBq m
and seem consistent to those obtained by the air-borne measurement.
Kinase, Sakae; Sato, Satoshi; Sakamoto, Ryuichi*; Yamamoto, Hideaki; Saito, Kimiaki
no journal, ,
Ishimori, Yuu; Tanaka, Hiroshi; Sakoda, Akihiro
no journal, ,
This paper illustrates environmental monitoring results in and around an old uranium mine site remediated by the Japan Atomic Energy Agency (JAEA). The site remediated is the waste rock site located on the steep slope of a hill about 1.5 km upstream from a residential area along a main ravine. Major remedial action was performed by covering the waste rock yards with weathering granite soil. Radon exhalation rate, radon concentration and 
-ray dose rate are mainly discussed. These measurements were carried out at about 30, 50 and 3300 points, respectively. These results prove that soil cover keeps its function over 5 years. In addition, environmental impact from the site has been negligible before the action.