Study on chemisorption model of cesium hydroxide onto stainless steel type 304

A large amount of cesium (Cs) chemisorbed onto stainless steel is predicted to be present especially in the upper region of reactor pressure vessel (RPV) during light water reactor severe accident. A chemisorption model was developed for estimation of such amounts of Cs for stainless steel type 304...

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Autores principales:	Kunihisa NAKAJIMA, Shunichiro NISHIOKA, Eriko SUZUKI, Masahiko OSAKA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	cesium chemisorption stainless steel cesium hydroxide silicon penetration theory mass transfer Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/60d28e1aa1124b858e05d9a740497d57
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spelling	oai:doaj.org-article:60d28e1aa1124b858e05d9a740497d572021-11-29T05:56:31ZStudy on chemisorption model of cesium hydroxide onto stainless steel type 3042187-974510.1299/mej.19-00564https://doaj.org/article/60d28e1aa1124b858e05d9a740497d572020-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/3/7_19-00564/_pdf/-char/enhttps://doaj.org/toc/2187-9745A large amount of cesium (Cs) chemisorbed onto stainless steel is predicted to be present especially in the upper region of reactor pressure vessel (RPV) during light water reactor severe accident. A chemisorption model was developed for estimation of such amounts of Cs for stainless steel type 304 (SS304) exposed to cesium hydroxide (CsOH) vapor. However, this existing chemisorption model cannot accurately reproduce experimental results and is considered not to be suitable for the estimation of the Cs-chemisorbed amounts under various conditions experienced in Fukushima Dai-ichi nuclear power station. Our recent laboratory study indicated that the surface reaction rate constant used in the exiting chemisorption model depended on both of silicon content in SS304 and concentration of gaseous CsOH as well as on temperature. Therefore, in this study, a modified Cs chemisorption model which accounts for these effects was constructed by combining penetration theory for gas-liquid mass transfer with chemical reaction and mass action law for CsOH decomposition at interface between gaseous and solid phases. As a result, it was found that the modified model was able to adequately describe effects on concentration of CsOH in gaseous phase and Si content in SS304 and more accurately reproduce the experimental data than the existing model.Kunihisa NAKAJIMAShunichiro NISHIOKAEriko SUZUKIMasahiko OSAKAThe Japan Society of Mechanical Engineersarticlecesiumchemisorptionstainless steelcesium hydroxidesiliconpenetration theorymass transferMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 3, Pp 19-00564-19-00564 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	cesium chemisorption stainless steel cesium hydroxide silicon penetration theory mass transfer Mechanical engineering and machinery TJ1-1570
spellingShingle	cesium chemisorption stainless steel cesium hydroxide silicon penetration theory mass transfer Mechanical engineering and machinery TJ1-1570 Kunihisa NAKAJIMA Shunichiro NISHIOKA Eriko SUZUKI Masahiko OSAKA Study on chemisorption model of cesium hydroxide onto stainless steel type 304
description	A large amount of cesium (Cs) chemisorbed onto stainless steel is predicted to be present especially in the upper region of reactor pressure vessel (RPV) during light water reactor severe accident. A chemisorption model was developed for estimation of such amounts of Cs for stainless steel type 304 (SS304) exposed to cesium hydroxide (CsOH) vapor. However, this existing chemisorption model cannot accurately reproduce experimental results and is considered not to be suitable for the estimation of the Cs-chemisorbed amounts under various conditions experienced in Fukushima Dai-ichi nuclear power station. Our recent laboratory study indicated that the surface reaction rate constant used in the exiting chemisorption model depended on both of silicon content in SS304 and concentration of gaseous CsOH as well as on temperature. Therefore, in this study, a modified Cs chemisorption model which accounts for these effects was constructed by combining penetration theory for gas-liquid mass transfer with chemical reaction and mass action law for CsOH decomposition at interface between gaseous and solid phases. As a result, it was found that the modified model was able to adequately describe effects on concentration of CsOH in gaseous phase and Si content in SS304 and more accurately reproduce the experimental data than the existing model.
format	article
author	Kunihisa NAKAJIMA Shunichiro NISHIOKA Eriko SUZUKI Masahiko OSAKA
author_facet	Kunihisa NAKAJIMA Shunichiro NISHIOKA Eriko SUZUKI Masahiko OSAKA
author_sort	Kunihisa NAKAJIMA
title	Study on chemisorption model of cesium hydroxide onto stainless steel type 304
title_short	Study on chemisorption model of cesium hydroxide onto stainless steel type 304
title_full	Study on chemisorption model of cesium hydroxide onto stainless steel type 304
title_fullStr	Study on chemisorption model of cesium hydroxide onto stainless steel type 304
title_full_unstemmed	Study on chemisorption model of cesium hydroxide onto stainless steel type 304
title_sort	study on chemisorption model of cesium hydroxide onto stainless steel type 304
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/60d28e1aa1124b858e05d9a740497d57
work_keys_str_mv	AT kunihisanakajima studyonchemisorptionmodelofcesiumhydroxideontostainlesssteeltype304 AT shunichironishioka studyonchemisorptionmodelofcesiumhydroxideontostainlesssteeltype304 AT erikosuzuki studyonchemisorptionmodelofcesiumhydroxideontostainlesssteeltype304 AT masahikoosaka studyonchemisorptionmodelofcesiumhydroxideontostainlesssteeltype304
_version_	1718407587543646208

Study on chemisorption model of cesium hydroxide onto stainless steel type 304

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