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C and 304L-type stainless steel materials used in BWRs in JapanShibata, Hiroki; Sakamoto, Kan*; Ouchi, Atsushi*; Kurata, Masaki
Journal of Nuclear Science and Technology, 52(10), p.1313 - 1317, 2015/10
Times Cited Count：17 Percentile：79.15(Nuclear Science & Technology)Chemical interactions between S.S. and BC may lead to the melting of control rods and subsequent relocation of control rod materials in the early stage of severe accident. The liquid products interact with the surroundings such as control rod blades, Zircaloy channel boxes and fuel rods, which may accelerate the fuel bundle degradation. Previous studies on the chemical interactions between S.S. and BC have been performed using the BC powders or pellets. However, almost all of control rods of BWR in Japan consist of granular BC filled in S.S. tubes. In the present study, the chemical reaction tests were carried out using the materials adopted in BWR in Japan, namely granular BC and 304L type S.S. and it was concluded that the kinetics of chemical interaction between S.S. and granular BC is clearly different from that between S.S. and pellet or powder BC.
Sakamoto, Kan*; Shibata, Hiroki; Une, Katsumi*; Ouchi, Atsushi*; Aomi, Masaki*; Kurata, Masaki
Proceedings of 2014 Water Reactor Fuel Performance Meeting/ Top Fuel / LWR Fuel Performance Meeting (WRFPM 2014) (USB Flash Drive), 7 Pages, 2014/09
The depth profiles of hydrogen were measured at outer surface of fuel claddings corroded in high temperature steams at 1073-1473 K to examine the barrierness of surface oxide layer against the hydrogen absorption/desorption. The results indicated that the oxide layer would be no longer the barrier against the hydrogen under some conditions although it remained as the barrier against the oxidation.
*; Ando, Toshiro; ; Arai, Takashi; Neyatani, Yuzuru; Yoshino, Ryuji; Tsuji, Shunji; Yagyu, Junichi; Kaminaga, Atsushi; ; et al.
Journal of Nuclear Materials, 220-222, p.390 - 394, 1995/00
Times Cited Count：16 Percentile：80.76(Materials Science, Multidisciplinary)no abstracts in English
Akaoka, Katsuaki; Oba, Hironori; Wakaida, Ikuo; Ouchi, Atsushi*; Mizusako, Fumiki*; Eto, Yoshinori*; Torimaru, Tadahiko*
no journal, ,
For measurement of the fuel debris from the Fukushima Daiichi Nuclear Power Station accident, we analyzed the LIBS spectrum of the mixed simulated fuel debris of U, Zr and Fe, using the least-squares method. We present the results of the calibration curve and analysis spectrum.
Oba, Hironori; Akaoka, Katsuaki; Wakaida, Ikuo; Ouchi, Atsushi*; Mizusako, Fumiki*; Eto, Yoshinori*; Torimaru, Tadahiko*
no journal, ,
no abstracts in English
Urano, Kenta; Ito, Atsushi*; Takano, Yuki*; Ouchi, Fumihisa*; Hirayama, Ryoichi*; Furusawa, Yoshiya*; Funayama, Tomoo*; Yokota, Yuichiro*
no journal, ,
To evaluate a role of low LET penumbra region on the biological effects of heavy ions, we have been developing an method for visualizing penumbra using immunofluorescence staining of OH radical-induced guanine damage, 8-OHdG, which was induced on a thin DNA sheet by heavy-ion exposure under aqueous environment. In the last annual meeting, we reported LET and ion species dependence of penumbra area and suggested the increase of penumbra area with increasing LET and particle atomic number. However, the LET dependence seemed to be inconsistent with the theoretical study by Chatterjee and Schaefer. In the present study, we improved image analysis method by adding the reduction procedure of fluorescence background noise.
Urano, Kenta; Ito, Atsushi*; Takano, Yuki*; Ouchi, Fumihisa*; Hirayama, Ryoichi*; Furusawa, Yoshiya*; Funayama, Tomoo*; Yokota, Yuichiro*
no journal, ,
no abstracts in English
Oba, Hironori; Akaoka, Katsuaki; Karino, Takahiro; Wakaida, Ikuo; Ouchi, Atsushi*; Miura, Yusuke*; Eto, Yoshinori*; Sakamoto, Kan*
no journal, ,
no abstracts in English
