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Konomura, Mamoru
Nihon Genshiryoku Gakkai-Shi ATOMO
, 53(3), p.211 - 214, 2011/03
It is not too much to say that R&D people have common sense to manage incidents in development of FBR with a method of risk analysis. In order to avoid an accident from some incidents, a reactor plant is designed with a way of defense in depth and a concept of multiple function and diversity in the design phase and is constructed and operated with enhancement of its reliability. Actually it is impossible to avoid any mechanical incidents. But the reliability can be enhanced by these incidents with appropriate risk management. In this sense, incidents are valuable for development of FBR. We should pay attention to developer's attitude how he understand incidents and how he improve his system on condition that he keeps transparency of information to public.
Birumachi, Atsushi; Ebine, Masumi; Katagiri, Masaki*; Nakamura, Tatsuya
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no abstracts in English
Mori, Tetsuya; Morohashi, Yuko; Maruyama, Shuhei; Kasahara, Hideyuki; Yabuki, Kentaro; Okawachi, Yasushi
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Shimazaki, Masanori; Hayafune, Hiroki; Futagami, Satoshi; Enuma, Yasuhiro*; Kawamura, Masaya*; Ogumo, Shinya*
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Watanabe, Yukinobu*; Ye, T.*; Hashimoto, Shintaro; Ogata, Kazuyuki*; Yahiro, Masanobu*
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Futagami, Satoshi; Nagae, Yuji; Wakai, Takashi; Kurome, Kazuya*; Toyoshi, Akira*; Enuma, Yasuhiro*; Koyama, Yoichi*; Kajikawa, Koji*; Aizawa, Taiki*; Miki, Kazuhiro*; et al.
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Yamada, Fumiaki; Minami, Masaki*
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A computational model to simulate integrated behaviors of a reactor core and the connected heat transport system was built and verified by trial calculations on a set of representative anomaly transient event, in order for application of the plant dynamics analysis code Super-COPD to evaluation of the cooling capability of Monju reactor core.
Abe, Hitoshi; Kashima, Takao; Tashiro, Shinsuke; Uchiyama, Gunzo; Tsuchino, Susumu*; Ishibashi, Takashi*
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In Japan Atomic Energy Agency, to contribute on confirmation of safety of fuel cycle facilities, evaluation method for soundness of confinement capability of the facilities under fire accident has been investigated. Panel materials of Glove-box and cable sheath materials were considered to be an examination object as the representative organic materials in the facilities. Combustion property data, such as mass loss rate of the materials and soot generation ratio, and clogging property data of HEPA filter with combustion of the materials were measured as a parameter with radiation heat given to the materials, supply flow rate to the materials and oxygen concentration in the supply flow. Furthermore, progress of rising differential pressure of HEPA filter under concrete scenario of fire accident was evaluated by connecting these data mutually.
Kumagai, Yuta; Nagaishi, Ryuji; Yamada, Reiji; Muroya, Yusa*; Katsumura, Yosuke*
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In the coexistent system of water and solid oxides, change in the radiation effect on water has been observed. To understand the characteristic reaction leading to the peculiar radiation effect, the transient behavior ob radicals produced in water radiolysis was measured in aqueous solution containing colloidal silica particles by pulse radiolysis technique. The time-resolved measurement on the kinetics of the reaction of OH radical with ferrocyanide ion revealed that a scavenging reaction of OH radical occurs in the presence of colloidal silica. The reactivity of the OH radical scavenging increased approximately in proportion to the surface area of the colloidal silica and was dependent on pH of aqueous solution. These results suggest that OH radical scavenged at the interface between water and silica. Therefore the reaction pathway of OH radical at the interface is expected to be different from that in bulk water.
Okawachi, Yasushi; Kitano, Akihiro; Suzuki, Takayuki; Okimoto, Yutaka; Usami, Shin; Deshimaru, Takehide
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no abstracts in English
Yabuki, Kentaro; Kitano, Akihiro; Fukushima, Masahiro; Miyagawa, Takayuki; Okawachi, Yasushi
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Kato, Yuko; Miyagawa, Takayuki; Kageyama, Takeshi; Okimoto, Yutaka
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Takano, Kazuya; Miyagawa, Takayuki; Ikegami, Kazunori; Kitano, Akihiro
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Kitano, Akihiro; Mori, Tetsuya; Nagata, Akito*; Saito, Kosuke; Misawa, Tsuyoshi*; Tamagawa, Yoichi*
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Moriyama, Kiyofumi; Chiba, Noriaki; Tashiro, Shinsuke; Nakamura, Hideo; Nakamura, Koichi*
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Regarding the organic iodine production during a severe accident of light water reactors, the organic solvent leaching from paints has drawn attention as an important organic source. We measured the amount of organic solvent leaching from epoxy paint as time series data and examined its dependence on temperature, paint thickness and age. We developed also a leach behavior model considering equilibrium between the concentrations in the paint matrix and in the solution.
Morohashi, Yuko; Mori, Tetsuya; Maruyama, Shuhei; Kasahara, Hideyuki; Yabuki, Kentaro; Okawachi, Yasushi
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Miyagawa, Takayuki; Kitano, Akihiro; Muranaka, Makoto; Kato, Mitsuya*; Okawachi, Yasushi
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Hazama, Taira; Kageyama, Takeshi; Hikichi, Takuo*; Okawachi, Yasushi; Suzuki, Takayuki
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no abstracts in English
Ayame, Junko
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no abstracts in English
Katono, Kenichi; Nagayoshi, Takuji; Tamai, Hidesada; Takase, Kazuyuki; Ito, Takashi
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no abstracts in English