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Corrosion tests and assessments of nuclear reacter pressure vessel materials in solutions containing sea water and boric acid

Research Project

Project/Area Number 24656433
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Material processing/treatments
Research InstitutionAkita University

Principal Investigator

KANEKO Hiroyuki  秋田大学, その他部局等, 名誉教授 (20006688)

Co-Investigator(Kenkyū-buntansha) FUKUMOTO Michihisa  秋田大学, 大学院工学資源学研究科, 准教授 (20343064)
NAKAGAWA Tokiko  秋田大学, 大学院工学資源学研究科, 助教 (40180252)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords原子力発電 / 圧力容器 / ガルバニック腐食 / 原発事故 / SA533B / インコネル / 海水 / ホウ酸
Outline of Final Research Achievements

Following the accident during 2011 at the Fukushima Daiichi nuclear plant, sea water for cooling and boric acid for maintaining a non-critical condition, both corrosive liquids, were injected into nuclear pressure vessels. An experimental study was undertaken to provide an accelerated corrosion test on SA533B low alloy steel and Inconel 600, materials used in the construction of the pressure vessels. Samples of these materials were immersed in saturated NaCl and concentrated H3BO3 aqueous solutions at a temperature of 423K. SA533B suffered little or no corrosion in saturated NaCl solution, significant corrosion in concentrated H3BO3 solution and substantial corrosion in the binary saturated NaCl - concentrated H3BO3 solution. Galvanic corrosion of SA533B was accelerated when Inconel 600 was also immersed in the same solution and the two samples were electrically connected. Corrosion rate in the initial stage was 0.07 mm per hour.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (5 results)

All 2013 2012 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (3 results)

  • [Journal Article] Accelerated Corrosion Tests of Nuclear Reactor Pressure Vessel Materials in NaCl-H3BO3 Solutions2013

    • Author(s)
      Hiroyuki Kaneko, Tokiko Nakagawa, Kousei Hiraizumi, Ryo Sakai
    • Journal Title

      Materials Transactions

      Volume: 54 Pages: 755-764

    • NAID

      130004456268

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] NaCl-H3BO3水溶液における原子炉圧力容器材料の加速腐食試験2012

    • Author(s)
      金児紘征、中川時子、平泉浩成
    • Journal Title

      日本金属学会誌

      Volume: 76 Pages: 615-623

    • NAID

      130004456268

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] NaCl-H3BO3-Na2B4O7溶液中におけるSA533B/インコネルガルバニック腐食形態

    • Author(s)
      中川時子、酒井亮、金児紘征
    • Organizer
      日本金属学会
    • Place of Presentation
      金沢大学
    • Related Report
      2013 Research-status Report
  • [Presentation] NaCl-H3BO3混合溶液中のSA533Bの腐食

    • Author(s)
      金児紘征
    • Organizer
      日本金属学会
    • Place of Presentation
      愛媛大学、松山市
    • Related Report
      2012 Research-status Report
  • [Presentation] NaCl-H3BO3-ほう砂中のSA533Bの腐食

    • Author(s)
      金児紘征
    • Organizer
      日本金属学会
    • Place of Presentation
      東京理科大学、東京都
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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