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JAEA Reports

Case studies of radiation dose assessment in emergency situation of nuclear facilities

Kawasaki, Masatsugu; Nakajima, Junya; Yoshida, Keisuke; Kato, Saori; Nishino, Sho; Nozaki, Teo; Nakagawa, Masahiro; Tsunoda, Junichi; Sugaya, Yuki; Hasegawa, Rie; et al.

JAEA-Data/Code 2017-004, 57 Pages, 2017/03

JAEA-Data-Code-2017-004.pdf:2.34MB

In emergency situation of nuclear facilities, we need to estimate the radiation dose due to radiation and radioactivity to grasp the influence range of the accident in the early stage. Therefore, we prepare the case studies of dose assessment for public exposure dose and personal exposure dose and contribute them to emergency procedures. This document covers about accidents of nuclear facilities in Nuclear Science Research Institute and past accident of nuclear power plant, and it can be used for inheritance of techniques of emergency dose assessment.

Journal Articles

Determination of low-level radiostrontium, with emphasis on ${it in situ}$ pre-concentration of Sr from large volume of freshwater sample using Powdex resin

Tomita, Jumpei; Yamamoto, Masayoshi*; Nozaki, Teo; Tanimura, Yoshihiko*; Oishi, Tetsuya

Journal of Environmental Radioactivity, 146, p.88 - 93, 2015/08

 Times Cited Count:10 Percentile:38.89(Environmental Sciences)

Oral presentation

Basic study on corrosion characteristic of beryllium metal

Ito, Masayasu; Takeuchi, Tomoaki; Nozaki, Teo*; Hatano, Yuji*; Matsuyama, Masao*; Tsuchiya, Kunihiko

no journal, , 

Beryllium metal is used as a neutron reflector in the JMTR. JMTR is scheduled to restart on FY2012. Furthermore, the study of material to improve lifetime of beryllium frame is being conducted. In this study, the corrosion behavior of beryllium metal has been investigated under JMTR reactor-water-simulated condition. Beryllium metal samples for this study are S-200F, S-65H and I-220H, and were prepared by Vacuum Hot Pressing (VHP) and Hot Isostatic Pressing (HIP). The corrosion test changed corrosion time, and was examined under pure water at 50$$^{circ}$$C. After the corrosion test, X-Ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) were examined as a surface analysis of beryllium metal, and electrical conductivity and impurity measurement were examined as a water analysis. As a result, I-220H indicated the highest corrosion resistance of three beryllium metal samples.

Oral presentation

An Examination of analysis for $$ ^{90}$$Sr in large water samples

Tomita, Jumpei; Nozaki, Teo; Tanimura, Yoshihiko; Yoshizawa, Michio

no journal, , 

Preconcentration method of Sr with Powdex resin (PCH for cation) at the field was examined to develop the analytical method for $$ ^{90}$$Sr in large water samples, which enables the analysis for a number of samples. In the experiment with 250 L of tap water samples, nearly 100% of Sr in water was adsorbed at 1 g L$$^{-1}$$ of PCH/water ratio, and duplication of boiling with 3M HNO$$_{3}$$ at 0.2 g mL$$^{-1}$$ of PCH/3M HNO$$_{3}$$ allowed the elution of 80% of Sr adsorbed.

Oral presentation

Determination of uranium in urine samples with ICP-MS

Tomita, Jumpei; Nozaki, Teo; Oishi, Tetsuya; Sasa, Yoichi

no journal, , 

no abstracts in English

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