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10239 Influence of Zirconium Alloy Strength on SCC Susceptibility of Cladding Tubes

Picture for 10239 Influence of Zirconium Alloy Strength on SCC Susceptibility of Cladding Tubes
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Product Number: 51300-10239-SG
ISBN: 10239 2010 CP
Author: Sergey Nikulin, Vladislav Khanzhin, Andrey Rozhnov, Vladislav Belov, Elina Li and Maria Koteneva
Publication Date: 2010
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Iodine-induced stress corrosion cracking (SCC) of zirconium cladding tubes is a well known problem inherent in fuel cladding operation in nuclear reactor core. In the present work we have applied a previously developed approach of SCC-testing of zirconium cladding tubes which includes acoustic emission measurements, fractography and metallographic a n a lysis to study how the zirconium alloy strength influences t h e mechanisms, kinetics and overall resistance of cladding tubes to iodine-induced SCC. A set of different alloy claddings having different strength (yield strength and ultimate tensile strength) have been comparatively tested for SCC. Claddings have been manufactured from different industrial zirconium alloys and have been tested as-received. It has been shown, that zirconium alloy strength increases the susceptibility of claddings to SCC via changing mechanisms and kinetics of SCC.

Keywords: zirconium alloy, fuel cladding, stress corrosion cracking, acoustic emission
Iodine-induced stress corrosion cracking (SCC) of zirconium cladding tubes is a well known problem inherent in fuel cladding operation in nuclear reactor core. In the present work we have applied a previously developed approach of SCC-testing of zirconium cladding tubes which includes acoustic emission measurements, fractography and metallographic a n a lysis to study how the zirconium alloy strength influences t h e mechanisms, kinetics and overall resistance of cladding tubes to iodine-induced SCC. A set of different alloy claddings having different strength (yield strength and ultimate tensile strength) have been comparatively tested for SCC. Claddings have been manufactured from different industrial zirconium alloys and have been tested as-received. It has been shown, that zirconium alloy strength increases the susceptibility of claddings to SCC via changing mechanisms and kinetics of SCC.

Keywords: zirconium alloy, fuel cladding, stress corrosion cracking, acoustic emission
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