JOPSS - Search Results

Journal Articles

SIMMER-III analyses of local fuel-coolant interactions in a simulated molten fuel pool; Effect of coolant quantity

Cheng, S.; Matsuba, Kenichi; Isozaki, Mikio; Kamiyama, Kenji; Suzuki, Toru; Tobita, Yoshiharu

Science and Technology of Nuclear Installations, 2015, p.964327_1 - 964327_14, 2015/00

https://doi.org/10.1155/2015/964327

Times Cited Count：6 Percentile：45.66(Nuclear Science & Technology)

Journal Articles

Electric power flow in a nuclear fusion power plant

Matsukawa, Makoto; Tobita, Kenji; Chikaraishi, Hirotaka*; Sagara, Akio*; Norimatsu, Takayoshi*

Purazuma, Kaku Yugo Gakkai-Shi, 80(7), p.559 - 562, 2004/07

https://doi.org/10.1585/jspf.80.559

Final purpose of the fusion energy development is to utilize the produced fusion power mainly as electric power for the easiness of transmission and conversion. In spite of the type of fusion power plant, large circulating electric power should exist in the plant for the plasma heating, current drive. This paper describes the electric power flow in the nuclear fusion power plants to be built as the DEMO reactor beyond ITER. Here, the necessity of the local energy storage and high efficient converter will be also discussed.

Journal Articles

Conversion coefficients from fluence to effective dose for heavy ions with energies up to 3 GeV/A

Sato, Tatsuhiko; Tsuda, Shuichi; Sakamoto, Yukio; Yamaguchi, Yasuhiro; Niita, Koji*

Radiation Protection Dosimetry, 106(2), p.137 - 144, 2003/11

https://doi.org/10.1093/oxfordjournals.rpd.a006343

Times Cited Count：19 Percentile：75.71(Environmental Sciences)

Radiological protection against high energy heavy ions has been an essential issue in the planning of long-term space missions. We calculated fluence to effective dose conversion coefficients for heavy ions using the Particle and Heavy Ion Transport code System PHITS coupled with an anthropomorphic phantom of the MIRD5 type. The calculations were performed for incidences of protons and typical space heavy ions with energies up to 3 GeV/A in the isotropic and anterior-posterior irradiations. Based on the results, we propose a simple fitting formula that can predict the effective dose from almost all kinds of space heavy ions below 3 GeV/A within an accuracy of 30%.

JAEA Reports

Study on steam explosions with molten silicon

Moriyama, Kiyofumi; Maruyama, Yu*; Nakamura, Hideo

JAERI-Research 2002-021, 36 Pages, 2002/11

JAERI-Research-2002-021.pdf:6.0MB

Silicon is a material which is easily oxidized like zirconium which is one of the LWR core materials. Also, its steam explosion behavior is a concern in semi-conductor industries where its melt is handled. In this study, steam explosion behavior of silicon melt and contribution of oxidation reaction in a steam explosion were investigated. Two cases of experiments were performed by dropping silicon melt into a water pool and both produced spontaneous steam explosions. Energy conversion ratio was 4--9% which was similar or slightly larger compared with previous experiments with thermite melt. Fragmentation of the melt was finer than previous experiments and the mass median diameter of the debris was 65--85m. An oxide layer of about 5m thick was fond on the debris surface indicating possibility of oxidation of several % of the melt.