JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-11 displayed on this page of 11
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

A Simulation of radiolysis of chloride solutions containing ferrous ion

Hata, Kuniki; Inoue, Hiroyuki*

Journal of Nuclear Science and Technology, 56(9-10), p.842 - 850, 2019/09

https://doi.org/10.1080/00223131.2019.1585986
 Times Cited Count：1 Percentile：10.81(Nuclear Science & Technology)

To investigate the effect of dissolved species from steels on the radiolysis processes of Cl$$^{-}$$, radiolysis simulations of solutions containing both Cl$$^{-}$$ and Fe$$^{2+}$$ were carried out. The results showed that the generation of radiolytic products (H$$_{2}$$O$$_{2}$$, O$$_{2}$$ and H$$_{2}$$) increased mainly by the addition of Fe$$^{2+}$$, and a drop in the pH was caused by the hydrolysis of Fe$$^{3+}$$. This pH drop enhanced the reactivity of Cl$$^{-}$$ with $$^{.}$$OH, which induced additional generation of H$$_{2}$$O$$_{2}$$ and O$$_{2}$$. These results show that low concentrations of Cl$$^{-}$$ (1 $$times$$ 10$$^{-3}$$ mol/dm$$^{3}$$ = 35ppm) in the presence of Fe$$^{2+}$$ could influence the generation of H$$_{2}$$O$$_{2}$$ and O$$_{2}$$ during water radiolysis. However, it is considered that these effects of Fe$$^{2+}$$ and low concentration of Cl$$^{-}$$ on water radiolysis are less important for corrosion of steels due to the low concentrations of H$$_{2}$$O$$_{2}$$ and O$$_{2}$$ generated. The other process, such as dissolution of iron enhanced by FeOOH, might predominantly induce corrosion under the conditions of solutions with low concentrations of H$$_{2}$$O$$_{2}$$ and O$$_{2}$$.

Journal Articles

Rapid measurement of the chloride diffusion coefficient in concrete from combination of non-steady-state migration experiment and EPMA

Ogino, Masataka*; Owaki, Eiji*; Shirase, Mitsuyasu*; Nakayama, Masashi

Konkurito Kogaku Nenji Rombunshu (DVD-ROM), 39(1), p.703 - 708, 2017/07

no abstracts in English

Journal Articles

Structural study of lanthanides(III) in aqueous nitrate and chloride solutions by EXAFS

Yaita, Tsuyoshi; Narita, Hirokazu*; Suzuki, Shinichi; Tachimori, Shoichi; Motohashi, Haruhiko; Shiwaku, Hideaki

Journal of Radioanalytical and Nuclear Chemistry, 239(2), p.371 - 375, 1999/00

https://doi.org/10.1007/BF02349514
 Times Cited Count：95 Percentile：98.36(Chemistry, Analytical)

no abstracts in English

Journal Articles

$$^{139}$$La NMR relaxation and chemical shift studies in the aqueous nitrate and chloride Solutions

Yaita, Tsuyoshi; ; Tachimori, Shoichi

Journal of Physical Chemistry B, 102(20), p.3886 - 3891, 1998/00

https://doi.org/10.1021/jp972334p
 Times Cited Count：26 Percentile：62.03(Chemistry, Physical)

no abstracts in English

Oral presentation

Corrosion behavior of carbon steel in neutral chloride aqueous solution under $$gamma$$-ray irradiation; Effect of chloride ion concentration

Motooka, Takafumi; Yonekawa, Kazuo; Ueno, Fumiyoshi

no journal, , 

It is known that the corrosion of steel in neutral chloride solution has a chloride concentration at which the corrosion rate reaches a maximum. However, it is unknown that the effect of radiation at a low dose rate on this phenomenon. Therefore, we examined the effect of radiation at a low dose rate on corrosion of steel in neutral chloride solution by corrosion tests using various concentration of chloride neutral solutions. As the results, the corrosion rate becomes a maximum at a certain chloride concentration. It is consider that the increase in conductivity of solutions along with the chloride concentration increases and the decrease in concentrations of hydrogen peroxide and dissolved oxygen are key factors for the corrosion of steel in neutral chloride solution under a low dose rate condition.

Oral presentation

A Measurement method for diffusivity coefficient of concrete by application of EPMA to an electrophoretic test of non-static state

Ogino, Masataka*; Owaki, Eiji*; Shirase, Mitsuyasu*; Nakayama, Masashi

no journal, , 

no abstracts in English

Oral presentation

Estimation of material balance of radiolysis products in aqueous chloride solution systems

Nagaishi, Ryuji; Inoue, Masao*; Kondo, Takafumi*; Godo, Masao*; Yoshida, Yoichi*; Kuwano, Ryo*

no journal, , 

no abstracts in English

Oral presentation

Radiolysis of water containing ferrous and chloride ions

Hata, Kuniki; Sato, Tomonori; Inoue, Hiroyuki*

no journal, , 

To evaluate the integrity of structural materials in stagnant water in primary containment vessels (PCVs) of Fukushima Daiichi Nuclear Power Plants, corrosion prediction is important. Because of high-dose rate in the PCVs, oxidative molecules, such as H$$_{2}$$O$$_{2}$$ or O$$_{2}$$, are generated from water radiolysis. For the corrosion prediction of materials in PCVs, the amounts of these molecules should be estimated. Stagnant water in the PCVs contains small amounts of impurities, such as anions from seawater or groundwater and metal cations derived from materials by corrosion. Some of these impurities show high reactivity with radiolytic species and would affect the production behavior of the oxidative molecules. In this study, the influence of Cl$$^{-}$$ on radiolysis of solutions, which contains small amount of Fe$$^{2+}$$, was investigated by radiolysis simulation. Acidification of the solutions due to reactions of Fe$$^{2+}$$ under irradiation enhanced the reaction of Cl$$^{-}$$ with radiolytic species, which resulted in the increase in the amounts of H$$_{2}$$O$$_{2}$$.

Oral presentation

Effect of ferrous ion addition on radiolysis of chloride ion solutions

Hata, Kuniki; Inoue, Hiroyuki*; Sato, Tomonori; Chimi, Yasuhiro

no journal, , 

Radiolysis simulations of dilute solutions of Cl$$^{-}$$ and Fe$$^{2+}$$ were carried out to understand the effect of low-concentrated Cl$$^{-}$$ on generation of radiolytic products in irradiated solutions containing Fe$$^{2+}$$. The results showed steady-state concentrations of radiolytic products, H$$_{2}$$O$$_{2}$$, O$$_{2}$$ and H$$_{2}$$, increased by adding Fe$$^{2+}$$, and additional generation of these products were observed due to addition of Cl$$^{-}$$. The reactivity of Cl$$^{-}$$ in water radiolysis was not significant at neutral pH. However, pH drop caused by hydrolysis of ferric ion, which is produced by the reaction of Fe$$^{2+}$$ with hydroxyl radical, enhanced the reactivity of Cl$$^{-}$$ with hydroxyl radical. This result indicates low concentration of Cl$$^{-}$$ could have an impact on generation of the oxidative products from water radiolysis if Fe$$^{2+}$$ coexists with Cl$$^{-}$$.

Oral presentation

Efforts on treatment of radioactive liquid waste at Chemical Processing Facility; Development on treatment method for chloride ion containing radioactive liquid waste

Tada, Kohei; Arai, Yoichi; Watanabe, So; Ogi, Hiromichi*; Nakamura, Masahiro; Shibata, Atsuhiro

no journal, , 

no abstracts in English

Oral presentation

Effects of halogen and ferrous ions on water radiolysis

Hata, Kuniki

no journal, , 

no abstracts in English

11 (Records 1-11 displayed on this page)
  • 1