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Study on Electrochemical Corrosion Potential of Stainless Steel in High Temperature Water under Irradiation of Ionizing Radiation

Research Project

Project/Area Number 14380238
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear engineering
Research InstitutionSaitama Institute of Technology

Principal Investigator

ISHIGURE Kenkichi  Saitama Institute of Technology, Advanced Scientific Research Laboratory, Professor (90010975)

Co-Investigator(Kenkyū-buntansha) TANAKA Kenichi  埼玉工業大学, 先端科学研究所, Professor (00016718)
ASAI Keisuke  Graduate School of Tohoku University, Engineering, Professor (60231859)
KYO Touei  Saitama Institute of Technology, Department of Engineering, Professor (10255143)
ONO Shouichi  Saitama Institute of Technology, Researcher
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥14,400,000 (Direct Cost: ¥14,400,000)
Fiscal Year 2004: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2003: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 2002: ¥6,600,000 (Direct Cost: ¥6,600,000)
Keywordsstainless steel / stress corrosion cracking / electrochemical corrosion potential / radiolysis of reactor water / computer simulation / hydrogen peroxide / OH radical / surface oxide layer / 電気化学腐食電位(ECP) / 分極曲線 / 限界電流密度 / 貴金属注入 / 不動態化 / 放射線照射 / SCC / 電気化学腐食電位 / 酸化被膜 / 応力腐食割れ / 腐食電位 / 放射線 / プラチナ錯体
Research Abstract

Control of electrochemical corrosion potential (ECP) is very important for mitigating stress corrosion cracking (SCC) of stainless steels used as structural materials in nuclear reactors. This study aims at investigating various factors affecting ECP.
It has been reported that key factors controlling ECP are oxidizing species, mainly H_2O_2 and O_2, which are produced by radiolysis of reactor water. Simulation on reaction kinetics of radiolysis was carried out using currently established input parameters for homogeneous systems relating to reactor water of BWR. It was confirmed that the major oxidizing species are H_2O_2 and O_2. However, it was found that the contribution of OH radical is not negligible under some specific conditions.
Evaluation of the interfacial reactions between water and metal phases is essential for the calculation of ECP based on mixed potential method. A new approximation model was developed to consider not only diffusion but also radiolysis within the diffusion … More layer formed at the interface, the latter being neglected in the previous model. Using this model the concentration profiles of chemical species were calculated under the various conditions. It was clarified that if the radiolysis within the diffusion layer is taken into account the limiting current densities for the cathodic reactions increase under some conditions by more than one order of magnitude compared to those calculated according to the previous model.
Anodic polarization curves derived from experiments are used for the ECP calculation. These curves are presumed to be largely affected by the property of surface oxide layers formed, but the details are not yet clear. Measurements of anodic polarization curves were carried out with metal specimens previously treated to give surface oxide layers. It was found that oxide layers comprising mainly hematite (Fe_2O_3) reduces significantly the current density in the passive region of the polarization curve in comparison with those composed of magnetite (Fe_3O_4) and ferrites (MFe_2O_4), and results in the increase in ECP.
In order to investigate the effect of radiation on surface oxide layers, the polarization behaviors are examined under the light irradiation with the metal specimens provided with hematite as surface oxide. The experimental results show that the light irradiation induces the decrease in ECP and increase in the passive current densities for the anodic polarization. These results were qualitatively explained on the basis of the behavior of excitons produced by the light irradiation in the hematite layer as n-type semi-conductor.
In relation to noble metal addition proposed as an effective method to control ECP a study was carried out to clarity the properties of Pt taken into oxide films. Less

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (33 results)

All 2006 2005 2004 2003 2002 Other

All Journal Article (14 results) (of which Peer Reviewed: 2 results) Presentation (10 results) Book (1 results) Publications (8 results)

  • [Journal Article] Analysis of water radiolysis in relation to stress corrosion cracking of stainless steel at high temperature-Effect of water radiolysis on limiting current densities of anodic and cathodic reactions under irradiation2006

    • Author(s)
      K.Ishigure, T.Nukii, S.Ono
    • Journal Title

      J.Nuclear Materials 350

      Pages: 56-65

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Analysis of water radiolysis in relation to stress corrosion cracking of stainless steel at high temperature―Effect of water radiolysis on limiting current densities of anodic and cathodic reactions under irradiation2006

    • Author(s)
      K.Ishigure, T.Nukii, S.Ono
    • Journal Title

      J.Nuclear Materials 350

      Pages: 56-65

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Radiation in the Evaluation of Electrochemical Corrosion Potential of Stainless Steel under In-reactor Condition2005

    • Author(s)
      K.Ishigure, T.Nukii, O.Sawamura, S.Ono
    • Journal Title

      Proc.Symposium of Water Chemistry and Corrosion of Nuclear Power Plants in Asia

      Pages: 1-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Radiation in the Evaluation of Electrochemical Corrosion Potential of Stainless Steel under In-reactor Condition2005

    • Author(s)
      K.Ishigure, T.Nukii, O.Sawamura, S.Ono, T.Hirabayashi, M.Hishida
    • Journal Title

      Proc.Symposium on Water Chemistry and Corrosion of Nuclear Power Plants in Asia

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] A new catalyst for selective oxidation of CO in H_2 : Part I, activation by depositing a large amount of FeOx on Pt/Al_2O_3 and Pt/CeO_2 catalysis2004

    • Author(s)
      K.Tanaka, Y.Morooka, K.Ishigure, t.Yajima, et al
    • Journal Title

      Catalysis letters 92

      Pages: 115-121

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Some problems in ECP evaluation of stainless steel in BWR environment using the mixed potential model2004

    • Author(s)
      K.Ishigure, T.Kimura, M.Okada, S.Ono, T.Hirabayashi, M.Hishida
    • Journal Title

      Proc.Water Chemistry of Nuclear Reactor Systems 1

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] A new catalysis for selective oxidation of CO in H2 : Part I, activation by depositing a large amount of FeOx on Pt/Al2O3 and Pt/CeO2 catalysts2004

    • Author(s)
      K.Tanaka, Y.Morooka, K.Ishigure, T.Yajima, et al
    • Journal Title

      Catalysis letters 92

      Pages: 115-121

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Some problems in ECP evaluation of stainless steel in BWR environment Using the mixed potential model2004

    • Author(s)
      K.Ishigure, T.Kimura, M.Okada, S.Ono, T.Hirabayashi, M.Hishida
    • Journal Title

      Proc.Water Chemistry of Nuclear Reactor Systems 1

      Pages: 3-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Some Problems in ECP Evaluation Stainless Steel in BWR Environment2004

    • Author(s)
      K.Ishigure, S.Okada, S.Ono, et al.
    • Journal Title

      Proc.Int.Conf.Water Chemistry of Nuclear Reactor Systems 1

      Pages: 3-8

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The effect of radiolysis on the cathodic limiting current density in ECP2004

    • Author(s)
      K.Ishigure, S.Ono
    • Journal Title

      5th Int.Workshop on LWR Coolant Water Radiolysis and Electrochemistry

      Pages: 1-1

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of Oxide Films on Electrochemical Polarization Behavior of Stainless Steel in Aqueous Systems2003

    • Author(s)
      C.Yabe, A.Kawano, T.Kimura, k.Ishigure, H.Hirabayashi, S.Ono, M.Hishida
    • Journal Title

      Proc.Int.Seminar on Water Chemistry and Corrosion in Nuclear Power Plants in Asia

      Pages: 168-173

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Oxide Films on Electrochemical Polarization Behavior of Stainless Steel in Aqueous Systems2003

    • Author(s)
      C.Yabe, A.Kawano, T.Kimura, K.Ishigure, H.Hirabayashi, S.Ono M.Hishida
    • Journal Title

      Proc.Int.Seminar on Water Chemistry and Corrosion in Nuclear Power Plants in Asia

      Pages: 168-173

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Added Reagent on Platinum Deposition into the Pre-filmed Stainless Steel in High Temperature Water2002

    • Author(s)
      S.Ono, H.Hirabayashi, K.Takamori, K.Tachibana, K.Ishigure
    • Journal Title

      Proc.Int.Conference on Chimie S3(158)

      Pages: 1-6

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Added Reagent on Platinum Deposition into the Pre-filmed Stainless Steel in High Temperature Water2002

    • Author(s)
      S.Ono, H.Hirabayashi, K.Takamori, T.Tachibana, K.Ishigure
    • Journal Title

      Pro.Int.Conference on Chimie S3(158)

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] ステンレス鋼のECP評価における水の放射線分解の解析-限界電流密度に及ぼす照射の影響2005

    • Author(s)
      貫井崇、小野昇一、石榑顕吉
    • Organizer
      日本原子力学会
    • Place of Presentation
      神奈川
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] Analysis of Water Radiolysis in Evaluation of ECP of Stainless Steel : Effect of Radiation on Limiting Current Density2005

    • Author(s)
      T.Nukii, S.Ono, K.Ishigure
    • Organizer
      Annual Meeting of Japan Atomic Energy Society, Proc.(3), p.573(C60)
    • Place of Presentation
      Kanagawa
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] The effect of radiolysis on the cathodic limiting current densities in ECP evaluation using a mixed potential model(MPM)2004

    • Author(s)
      K.Ishigure, S.Ono
    • Organizer
      5^<th> International Workshop on LWR Coolant Water Radiolysis and Electrochemistry
    • Place of Presentation
      San Francisco
    • Year and Date
      2004-10-15
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] ステンレス鋼の分極挙動に及ぼす酸化種の影響2004

    • Author(s)
      木村崇弘、矢部千晶、岡田由里子、沢村由紀、石榑顕吉、小野昇一、平林光、菱田護
    • Organizer
      日本原子力学会
    • Place of Presentation
      岡山
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] ステンレス鋼の分極挙動に及ぼす酸化種の影響 そのII 過酸化水素と酸素のカソード分極曲線の比較2004

    • Author(s)
      矢部千晶、木村崇弘、岡田由里子、沢村由紀、石榑顕吉、小野昇一、平林光、菱田護
    • Organizer
      日本原子力学会
    • Place of Presentation
      京都
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] Effect of Oxidizing Species on Polarization Behavior of Stainless Steel2004

    • Author(s)
      T.Kimura, C.Yabe, Y.Okada, S.Sugiyama, K.Ishigure, S.Ono, H.Hirabayashi, M.Hishida
    • Organizer
      Annual Meeting of Japan Atomic Energy Society, Proc.(3), p 776(E51)
    • Place of Presentation
      Okayama
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] Effect of Oxidizing Species on Polarization Behavior of Stainless Steel Part II, Comparison between polarization curves of hydrogen peroxide and oxygen2004

    • Author(s)
      C.Yabe, T.Kimura, Y.Okada, Y.Sawamura, K.Ishigure, S.Ono, H.Hirabayashi, M.Hishida
    • Organizer
      Fall Meeting of Japan Atomic Energy Society, Proc.(3), p.766(E51)
    • Place of Presentation
      Kyoto
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] ステンレス鋼の分極挙動に及ぼす表面酸化被膜の挙動2003

    • Author(s)
      矢部千晶、木村崇弘、河野篤、石榑顕吉、小野昇一、菱田護
    • Organizer
      日本原子力学会
    • Place of Presentation
      静岡
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] Effect of Surface Oxide Films on Polarization Behavior of Stainless Steel2003

    • Author(s)
      C.Yabe, T.Kimura, A.Kawano, A.Ishigure, S.Ono, H.Hirabayashi M.Hishida
    • Organizer
      Fall Meeting of Japan Atomic Energy Society, Proc.(3)L6 p662
    • Place of Presentation
      Shizuoka
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Presentation] The Effect of Radiolysis on the Cathodic Limiting Current Densities in ECP Evaluation using a Mixed Potential Model(MPM)

    • Author(s)
      K.Ishigure, S.Ono
    • Organizer
      5^<th> International Workshop on LWR Coolant Water Radiolysis and Electrochemistry
    • Place of Presentation
      San Francisco
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] Water, Steam and Aqueous Solutions for Electric Power(Power Cycle Chemistry in Nucles Cycles-Technology Development and Importance of Fundamental Data)2005

    • Author(s)
      K.Ishigure et al.
    • Publisher
      Int.Assoc.for the Properties of Water and Steam(Maruzen)
    • Related Report
      2004 Annual Research Report
  • [Publications] H.Takiguchi, H.Takamatsu, S.Uchida, K.Ishigure et al.: "Water Chemistry Data Acquisition, Processing, Evaluation and Diagnostic Systems in Light Water Reactors"J.Nuclear Science Technology. 41. 214-225 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Ono, K.Ishigure et al.: "Electrochemical Potentials of Stainless Steel in High Temperature Water"Proc.Int.Seminar on Water Chemistry and Corrosion in Nuclear Power Plants in Asia. 168-173 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] C.Yabe, K.Ishigure, S.Ono et al.: "Effect of Oxide Films on Electrochemical Polarization Behavior of Stainless Steel in Aqueous System"Proc.Int.Seminar on Water Chemistry and Corrosion in Nuclear Power Plants in Asia. 307-312 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Tanaka, Y.Morooka, K.Ishigure et al.: "A new catalyst for selective oxidation of CO in H_2 Part 1. Activation by depositing a large amount of FeOx on Pt/Al_2O_3and Pt/CeO_2 catalysts"Catalysis Letters. 92. 115-121 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 石榑顕吉他: "原子力発電プラントの水化学最適化の実績と将来展望"日本原子力学会. 176 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] O.L.Blajiev, K.Ishigure 他: "Structure and Properties of Chromium-and Zinc-Oxide Layers Formed on Zircaly-2 in High Temperature Water"Nuclear Technology. 137. 60-71 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Ishigure: "Current Status of Water Chemistry in Japan"Proc. Int. Conf. Chimie 2002. S1. 1-7 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.no, K.Ishigure 他: "Effect of Added Reagent on Platinum Deposition into the Pre-Filmed Stainless Steel in High Temperature Water"Proc. Int. Conf. Chimie 2002. S3. 1-6 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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