The Mechanism of Localized In-pile Corrosion of Zirconium Alloys, II)

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概要

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• The “β-induced electric fields” in a reactor, proposed in the previous paper, are estimated more quantitatively in two cases. One of the cases is that of the shadow formation on the surface of Zircaloy fuel channels near stainless control blades in BWRs by adapting a multi-element model analogous to an electric circuit instead of the preliminary model in the previous paper. The other is that of the Halden reactor irradiation experiments, in which the localized in pile corrosion of Zircaloy fuel claddings near platinum was reported by Etoh et al., by adapting the detailed irradiation data in the report. As a result, both cases are explained by two parallel mechanisms affected by the “β-induced electric fields” on and in zirconium oxide and high-purity water. One of the mechanisms is the formation of localized electrochemical cells those occur between the surface of zirconium oxide adjacent to bare and grounded metals such as stainless steel or platinum and its neighboring parts. The other is the retardation of oxygen ions in the zirconium oxide by the space charge effect, proposed by Nanikawa et al., according to the level of the induced electric potential.

• 社団法人 日本原子力学会の論文
• 1999-07-25

著者

• Ozaki Satoru

  Nuclear Engineering Laboratory Toshiba Corporation

関連論文

• The Mechanism of Localized In-pile Corrosion of Zirconium Alloys, II)
• The Mechanism of Localized In-pile Corrosion of Zirconium Alloys
• The Mechanism of Localized In-pile Corrosion of Zirconium Alloys, (III)

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