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Journal Articles

Electrochemical behavior of carbon steel with bentonite/sand in saline environment

Kitayama, Ayami; Taniguchi, Naoki; Mitsui, Seiichiro

Materials and Corrosion, 72(1-2), p.211 - 217, 2021/01

 Times Cited Count:0 Percentile:0(Materials Science, Multidisciplinary)

Journal Articles

Development of laser cutting technology of thick steel plates for nuclear facilities

Tamura, Koji*; Toyama, Shinichi

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 62(5), p.268 - 271, 2020/05

The laser cutting technology is expected to be a promising candidate for the decommissioning measure of nuclear facilities, because it has a lot of advantage such as its high controllability and excellent suitability to remote handling by robot arm, etcetera. This report describes the recent result from laser cutting technology development for thick steel materials summarizing the cutting demonstration of 300 mm thick steels and dummy pressure vessel, the analysis of cutting condition of thick steel cutting, the observation of cutting process, remote controlled cutting system, the cutting in pile of steels by the system, and countermeasure for fume produce by cutting process.

Journal Articles

Electrochemical measurements in various environments; Corrosion monitoring of carbon steel in deep underground environment

Taniguchi, Naoki; Nakayama, Masashi

Zairyo To Kankyo, 67(12), p.487 - 494, 2018/12

This article describes the current status of corrosion monitoring methods and examples of the measurement under deep underground environments for carbon steel overpacks for high-level radioactive waste disposal. Based on the studies on corrosion monitoring using AC Impedance technique, some of the typical measurement systems such as the electrodes arrangement are introduced. In-situ corrosion monitoring in engineering scale test is also being attempted using a deep underground research facility, and the measurement method and results are presented in this article.

Journal Articles

Corrosion rate of carbon steel in NaCl solution with various chloride ion concentration under $$gamma$$-ray irradiation

Motooka, Takafumi

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 23, 2016/02

Corrosion rates of carbon steel in chloride aqueous solutions under a low dose rate were investigated by corrosion test using chloride aqueous solutions with different chloride concentrations. The corrosion rate of carbon steel had the maximum value at a certain concentration at a dose rate of 500Gy/h. The oxidants produced by radiolysis of chloride aqueous solution enhanced the corrosion of carbon steel. The dependence of corrosion rate and chloride concentration has a positive correlation with the dependence of oxidant concentration and chloride concentration.

Journal Articles

Study of corrosion rate of carbon steel in diluted artificial seawater under simulated irradiation condition

Komatsu, Atsushi; Tsukada, Takashi; Ueno, Fumiyoshi; Yamamoto, Masahiro

Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 4 Pages, 2015/05

Effect of oxygen and hydrogen peroxide on corrosion rate of carbon steel in diluted artificial seawater was investigated by electrochemical methods. Diffusion coefficient and thickness of diffusion layer for oxygen and hydrogen peroxide were measured to estimate the diffusion limiting current density. Corrosion tests of carbon steel were also conducted in diluted artificial seawater containing oxygen and/or hydrogen peroxide at 323K. The diffusion coefficient of hydrogen peroxide was about 0.8 times lower than that of oxygen, and the thickness of diffusion layer was almost equivalent between oxygen and hydrogen peroxide. Diffusion limiting current density of hydrogen peroxide was estimated to be 0.4 times lower than that of oxygen in the same concentration at 323K. Plot of corrosion rate with the addition of concentration of oxygen and 0.4 times concentration of hydrogen peroxide showed good correlation.

JAEA Reports

Data Book of Examination of the Ruptured Pipe at the Hamaoka Nuclear Power Station Unit-1

JAERI Working Group for Examination of the Ruptured Pipe at Hamaoka-1

JAERI-Tech 2002-045, 253 Pages, 2002/03

JAERI-Tech-2002-045.pdf:60.08MB

no abstracts in English

JAEA Reports

Report of examination of the ruptured pipe at the Hamaoka Nuclear Power Station Unit-1

JAERI Working Group for Examination of the Ruptured Pipe at Hamaoka-1

JAERI-Tech 2001-094, 60 Pages, 2001/12

JAERI-Tech-2001-094.pdf:13.99MB

no abstracts in English

Journal Articles

Characterisation of oxide films formed on steel surface in BWR environment

Kameo, Yutaka

Proceedings of OECD/NEA Workshop on Evaluation of Speciation Technology, p.241 - 245, 1999/00

no abstracts in English

JAEA Reports

Compilation of low-cycle fatigue data of reactor structural materials

Iida, Kunihiro*; Shibata, Katsuyuki; Ueda, Shuzo; Kobayashi, Hideo*; Higuchi, Makoto*; *; *; *; *; *; et al.

JAERI-M 91-224, 88 Pages, 1992/01

JAERI-M-91-224.pdf:3.08MB

no abstracts in English

Journal Articles

Thermal shock tests on various materials of plasma facing components for FER/ITER

Seki, Masahiro; Akiba, Masato; Araki, Masanori; ; Dairaku, Masayuki; *; Fukaya, Kiyoshi; Ogawa, Masuro; Ise, Hideo*

Fusion Engineering and Design, 15, p.59 - 74, 1991/00

 Times Cited Count:17 Percentile:85.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Investigation and evaluation of ductile fracture behaviors in LWR piping under bending load

Shibata, Katsuyuki; Yasuda, Yuji; Onizawa, Kunio; Miyazono, S.

Structural Mechanics in Reactor Technology,Vol.G, p.461 - 466, 1987/00

no abstracts in English

Journal Articles

A New gas equilibration method for the measurement of carbon potential; Carbon potential in austenitic 316 stainless steel at 1,000$$^{circ}$$C

; ; ;

Journal of Nuclear Materials, 116(2-3), p.178 - 183, 1983/00

 Times Cited Count:7 Percentile:65.47(Materials Science, Multidisciplinary)

no abstracts in English

Oral presentation

Effect of concentration of artificial sea water on corrosion behavior of steel in air-solution alternating condition

Otani, Kyohei; Tsukada, Takashi; Ueno, Fumiyoshi; Kato, Chiaki

no journal, , 

Corrosion tests of carbon steel was carried out in air-solution alternating condition in previous study. It has been reported that the corrosion rate of carbon steel exposed in air-solution alternating condition was accelerated compare with the steel exposed in solution. In this study, it was investigated that the effect of concentration of model sea water on corrosion rate of carbon steel in air-solution alternating condition. The mass measurement in corrosion tests clarified that the corrosion rate of carbon steel in the 200 times diluted model sea water is fastest during various model sea water. Cross-sectional analysis of iron rust layer formed on carbon steel after corrosion tests indicated that the corrosion rate of carbon steel in model sea water is decreased by precipitation of metal cations containing in model sea water.

14 (Records 1-14 displayed on this page)
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