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Kurihara, Momo*; Yasutaka, Tetsuo*; Aono, Tatsuo*; Ashikawa, Nobuo*; Ebina, Hiroyuki*; Iijima, Takeshi*; Ishimaru, Kei*; Kanai, Ramon*; Karube, Jinichi*; Konnai, Yae*; et al.
Journal of Radioanalytical and Nuclear Chemistry, 322(2), p.477 - 485, 2019/11
Times Cited Count：2 Percentile：21.58(Chemistry, Analytical)We assessed the repeatability and reproducibility of methods for determining low dissolved radiocesium concentrations in freshwater in Fukushima. Twenty-one laboratories pre-concentrated three of 10 L samples by five different pre-concentration methods (prussian-blue-impregnated filter cartridges, coprecipitation with ammonium phosphomolybdate, evaporation, solid-phase extraction disks, and ion-exchange resin columns), and activity of radiocesium was measured. The z-scores for all of the 
Cs results were within 
2, indicating that the methods were accurate. The relative standard deviations (RSDs) indicating the variability in the results from different laboratories were larger than the RSDs indicating the variability in the results from each separate laboratory.
Tomita, Hiroshi*; Naoe, Takashi; Futakawa, Masatoshi
no journal, ,
Micro-pipe will be used to inject microbubbles into flowing mercury in high-power pulsed spallation neutron source. The effect of mercury immersion on the fatigue strength of 316-type stainless steel had been recognized using micro-size specimens. The mercury immersion attach is enhanced on the surface layer contact with mercury. In fact, the hardness of the surface layer was increased by the mercury immersion. Because the micro-pipe will be suffered with the flow induced vibration under flowing mercury and the immersion effect might be enhanced in micro-size range, it is indispensable to evaluate the effects of mercury and size on the fatigue. In the paper, we will show the preliminary results on the tensile fatigue strength of the micro-pipe with mercury immersion and discuss the size effects on the fatigue strength.
