High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident

In-pile instrumentation systems in present-day light water reactors (LWR) are indispensable to monitor all situations during reactor operation and reactor shut down. However, the systems did not work sufficiently well in situations like the severe accident (SA) at the Fukushima Dai-ichi nuclear powe...

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Autores principales:	Hiroko NAKANO, Noriaki HIROTA, Hiroshi SHIBATA, Tomoaki TAKEUCHI, Kunihiko TSUCHIYA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2018
Materias:	severe accident condition mi cables sheath materials oxidation corrosion degree parabolic rate Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/60da4394e2cb4e9c91d047cd3dfebbf2
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spelling	oai:doaj.org-article:60da4394e2cb4e9c91d047cd3dfebbf22021-11-26T07:16:02ZHigh-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident2187-974510.1299/mej.17-00594https://doaj.org/article/60da4394e2cb4e9c91d047cd3dfebbf22018-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/5/2/5_17-00594/_pdf/-char/enhttps://doaj.org/toc/2187-9745In-pile instrumentation systems in present-day light water reactors (LWR) are indispensable to monitor all situations during reactor operation and reactor shut down. However, the systems did not work sufficiently well in situations like the severe accident (SA) at the Fukushima Dai-ichi nuclear power station. Thus, it is necessary to develop monitoring systems for the prevention of injuries in the event of an SA. Mineral-insulated (MI) cables with radiation and heat resistance are exposed to a mixture gas including nitrogen, oxygen, hydrogen, water vapor, and fission products at high temperature under SA conditions. In this study, corrosion tests under the simulated SA conditions (air, air/H2O, and I2/CO/O2/H2O) for temperatures up to 1015°C were performed for candidate sheath materials of type 316 stainless steel (316SS) and nickel-based alloy (NCF600). As a result, a uniform oxide film was formed on the surface of both the 316SS and NCF600 specimens in the air or air/H2O environments from 720°C to 1015°C, and the fracture time of the MI cable was evaluated by the degree of corrosion and the parabolic law. Conversely, when the gas mixture environment contained I2, each surface of the specimen showed complicated corrosion behavior that caused not only local corrosion but also the formation of a uniform oxide film at 800°C.Hiroko NAKANONoriaki HIROTAHiroshi SHIBATATomoaki TAKEUCHIKunihiko TSUCHIYAThe Japan Society of Mechanical Engineersarticlesevere accident conditionmi cablessheath materialsoxidationcorrosion degreeparabolic rateMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 5, Iss 2, Pp 17-00594-17-00594 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	severe accident condition mi cables sheath materials oxidation corrosion degree parabolic rate Mechanical engineering and machinery TJ1-1570
spellingShingle	severe accident condition mi cables sheath materials oxidation corrosion degree parabolic rate Mechanical engineering and machinery TJ1-1570 Hiroko NAKANO Noriaki HIROTA Hiroshi SHIBATA Tomoaki TAKEUCHI Kunihiko TSUCHIYA High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
description	In-pile instrumentation systems in present-day light water reactors (LWR) are indispensable to monitor all situations during reactor operation and reactor shut down. However, the systems did not work sufficiently well in situations like the severe accident (SA) at the Fukushima Dai-ichi nuclear power station. Thus, it is necessary to develop monitoring systems for the prevention of injuries in the event of an SA. Mineral-insulated (MI) cables with radiation and heat resistance are exposed to a mixture gas including nitrogen, oxygen, hydrogen, water vapor, and fission products at high temperature under SA conditions. In this study, corrosion tests under the simulated SA conditions (air, air/H2O, and I2/CO/O2/H2O) for temperatures up to 1015°C were performed for candidate sheath materials of type 316 stainless steel (316SS) and nickel-based alloy (NCF600). As a result, a uniform oxide film was formed on the surface of both the 316SS and NCF600 specimens in the air or air/H2O environments from 720°C to 1015°C, and the fracture time of the MI cable was evaluated by the degree of corrosion and the parabolic law. Conversely, when the gas mixture environment contained I2, each surface of the specimen showed complicated corrosion behavior that caused not only local corrosion but also the formation of a uniform oxide film at 800°C.
format	article
author	Hiroko NAKANO Noriaki HIROTA Hiroshi SHIBATA Tomoaki TAKEUCHI Kunihiko TSUCHIYA
author_facet	Hiroko NAKANO Noriaki HIROTA Hiroshi SHIBATA Tomoaki TAKEUCHI Kunihiko TSUCHIYA
author_sort	Hiroko NAKANO
title	High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
title_short	High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
title_full	High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
title_fullStr	High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
title_full_unstemmed	High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
title_sort	high-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident
publisher	The Japan Society of Mechanical Engineers
publishDate	2018
url	https://doaj.org/article/60da4394e2cb4e9c91d047cd3dfebbf2
work_keys_str_mv	AT hirokonakano hightemperatureoxidationofsheathmaterialsusingmineralinsulatedcablesforasimulatedsevereaccident AT noriakihirota hightemperatureoxidationofsheathmaterialsusingmineralinsulatedcablesforasimulatedsevereaccident AT hiroshishibata hightemperatureoxidationofsheathmaterialsusingmineralinsulatedcablesforasimulatedsevereaccident AT tomoakitakeuchi hightemperatureoxidationofsheathmaterialsusingmineralinsulatedcablesforasimulatedsevereaccident AT kunihikotsuchiya hightemperatureoxidationofsheathmaterialsusingmineralinsulatedcablesforasimulatedsevereaccident
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High-temperature oxidation of sheath materials using mineral-insulated cables for a simulated severe accident

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