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Nemoto, Yoshiyuki; Kaji, Yoshiyuki; Ogawa, Chihiro; Nakashima, Kazuo*; Tojo, Masayuki*; Goto, Daisuke*
Fushoku Boshoku Kyokai Dai-62-Kai Zairyo To Kankyo Toronkai Koenshu (CD-ROM), p.23 - 24, 2015/11
In order to clarify the air oxidation behavior of the cladding at high temperatures for study on improvement of safety for accident conditions in spent fuel pool, the oxidation tests for both small specimens under constant temperature conditions and long specimens under loss of coolant simulated temperature conditions were carried out, and the knowledge for influence of both temperature gradient and preoxide film on oxidation behavior of the cladding were obtained in this study.
Soma, Yasutaka; Kato, Chiaki; Ueno, Fumiyoshi
no journal, ,
To understand the effect of crevice solution chemistry on stress corrosion cracking of stainless steel in high temperature pure water, local solution electrical conductivity was measured using artificial crevice with small sensors. If the crevice gap was narrow enough, local solution electrical conductivity increased more than 100 times than that of bulk pure water and intergranular corrosion occurred.
Taniguchi, Naoki; Kawasaki, Manabu; Nakayama, Masashi; Sugita, Yutaka; Tachi, Yukio; Honda, Akira
no journal, ,
In previous study, a corrosion sensor has been developed and its appicability to monitoring of the corrosion behavior of carbon steel overpack has been confirmed. In this study, a simulated overpack was placed with buffer material composed mainly of bentonite in test tunnel of 350m deep underground constructed at Horonobe underground research laboratory. The corrosion monitoring was performed by AC impedance method using the corrosion sensors embeded in the buffer material.
Fujii, Kazumi*; Iwanami, Masaru*; Ishioka, Shinichi*; Kaneko, Tetsuji*; Tanaka, Norihiko*; Kawaharada, Yoshiyuki*; Yokoyama, Yutaka*; Umehara, Ryuji*; Kato, Chiaki; Ueno, Fumiyoshi; et al.
no journal, ,
no abstracts in English
Kaneko, Tetsuji*; Tanaka, Norihiko*; Kawaharada, Yoshiyuki*; Fujii, Kazumi*; Iwanami, Masaru*; Ishioka, Shinichi*; Yokoyama, Yutaka*; Umehara, Ryuji*; Kato, Chiaki; Ueno, Fumiyoshi; et al.
no journal, ,
no abstracts in English
-ray irradiation on inhibition of steel corrosion in diluted sea waterSato, Tomonori; Kato, Chiaki; Motooka, Takafumi; Ueno, Fumiyoshi; Nakano, Junichi; Kaneko, Tetsuji*; Tanaka, Norihiko*; Kawaharada, Yoshiyuki*; Fujii, Kazumi*; Iwanami, Masaru*; et al.
no journal, ,
no abstracts in English
Yokoyama, Yutaka*; Umehara, Ryuji*; Tanaka, Norihiko*; Kawaharada, Yoshiyuki*; Kaneko, Tetsuji*; Fujii, Kazumi*; Iwanami, Masaru*; Ishioka, Shinichi*; Kato, Chiaki; Ueno, Fumiyoshi; et al.
no journal, ,
no abstracts in English
Kasahara, Shigeki; Chimi, Yasuhiro; Nishiyama, Yutaka
no journal, ,
no abstracts in English
Irisawa, Eriko; Ueno, Fumiyoshi; Abe, Hitoshi
no journal, ,
no abstracts in English
Igarashi, Takahiro; Kato, Chiaki; Irisawa, Eriko; Ueno, Fumiyoshi
no journal, ,
It is known that corrosion rate of stainless steel in nitric acid solution is affected by the valence change of oxidizing metallic ions. In this study, we conducted redox reaction analyses using chemical reaction calculation model to clarify the mechanism of valence change. We obtained that the oxidization of metallic ions in the solution is not only caused by nitrus acid but also nitrogen oxides.
Ishijima, Yasuhiro; Ueno, Fumiyoshi
no journal, ,
no abstracts in English