抄録
In 2012, JAEA has established a laboratory in Fukushima-city to implement radioactivity analysis of environmental samples. Key nuclides measured in this laboratory are 134Cs and 137Cs (radiocesium). For the purpose, situation of radiocesium inflow into the laboratory building and its effects on the analyses were investigated based on the gamma-spectrometry with germanium detectors. As a result, the surface densities of radiocesium in the laboratory was found to be far below the minimum detectable activities of survey instruments routinely used for the radiation control purposes.
