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Decontamination of School Facilities in Fukushima-city

Published online by Cambridge University Press:  01 February 2013

Hideki Yoshikawa ,
Kazuki Iijima ,
Hiroshi Sasamoto ,
Kenso Fujiwara ,
Seiichiro Mitsui ,
Akira Kitamura ,
Hiroshi Kurikami ,
Takayuki Tokizawa ,
Mikazu Yui  and
Shinichi Nakayama
Hideki Yoshikawa
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Kazuki Iijima
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Hiroshi Sasamoto
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Kenso Fujiwara
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Seiichiro Mitsui
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Akira Kitamura
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Hiroshi Kurikami
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency
Takayuki Tokizawa
Affiliation:
Ningyo-toge Enviromnental Engineering Center, Japan Atomic Energy Agency
Mikazu Yui
Affiliation:
Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency Nuclear Science Research Institute, Japan Atomic Energy Agency
Shinichi Nakayama
Affiliation:
Policy Planning and Administration Department, Japan Atomic Energy Agency
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Abstract

Following the release of radionuclides into the environment as a result of the accident at Fukushima Daiichi nuclear power plant, Japan Atomic Energy Agency (JAEA) had to develop an immediate and effective method of reducing the dose rate received by students in school facilities. A demonstration of a reducing method was carried out by JAEA at a junior high school ground and kindergarten yard in the center of Fukushima-city. Dose rates of the released radionuclides are largely controlled by the ground level contamination and accumulation of mainly Cesium137 (Cs-137) and Cesium 134 (Cs-134) in populated areas. An effective means of reducing dose rate was to remove the surface soil and to bury it on-site under fresh uncontaminated soil or soil collected under deep depth at the site for shielding. The dose rate at1 m above ground level was reduced from 2.5 µSv/h to 0.15 µSv/h.

Keywords

Cswaste managementenvironmentally protective
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1518: Symposium LL – Scientific Basis for Nuclear Waste Management XXXVI , 2012 , pp. 269 - 275
Copyright
Copyright © Materials Research Society 2013 

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