Stress corrosion cracking of zircaloy-2 by metal iodides.

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概要

• 論文の詳細を見る

• Some metal iodides such as of Fe, Al, Zr and Te are known to cause stress corrosion cracking (SCC) of Zircaloy just as iodine itself does. Therefore 15 metal iodides were selected as corrodants, and SCC tests were carried out using the internal gas pressurization method.<BR>The results showed that : (1) only those metal iodides which react thermodynamically with Zr to produce ZrI<SUB>4</SUB> cause SCC of Zircaloy-2; (2) when SCC occurs, the reaction rate between the iodide and Zr seems to be a main factor in determining the SCC susceptibility ; (3) gaseous ZrI<SUB>4</SUB> is the most corrosive agent ; and (4) some species of metal iodides, such as PbI, cause SCC of Zircaloy-2 more easily than I<SUB>2</SUB> vapor.<BR>Scanning electron microscope (SEM) examination and electron probe microanalysis (EPMA) on the fracture surface of failed specimens revealed that ZrI, , formed as the reaction product between the metal iodides and Zr, might induce SCC of Zircaloy-2 rather than the iodides themselves.

• 一般社団法人 日本原子力学会の論文

著者

• Shimada Sachio

  Nippon Nuclear Fuel Development Co. Ltd.

• NAGAI Masayuki

  Nippon Nuclear Fuel Development Co., Ltd.

• MATSUURA Tetsuaki

  Nippon Nuclear Fuel Development Co., Ltd.

関連論文

• A Simple Model for Hydrogen Re-distribution in Zirconium-lined Fuel Claddings
• Reduction of plastic anisotropy of zircaloy cladding by neutron irradiation. (I). Yield loci obtained from knoop hardness.:Yield Loci Obtained from Knoop Hardness
• Effect of oxygen content on tensile properties of low oxygen zircaloy-2.
• Stress corrosion cracking of zircaloy-2 by metal iodides.
• Reduction of plastic anisotropy of zircaloy cladding by neutron irradiation. (II). Numerical simulations of yield loci.:Numerical Simulations of Yield Loci

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