IGSCC DISPOSITION CURVES FOR ALLOY 82 IN BWR NORMAL WATER CHEMISTRY

QC 20120228
In many nuclear power plants, areas of susceptible material in the reactor systems are replaced or mitigated. Many of the areas where the nickel-based weld metal Alloy 182 have been used, are not replaceable but need to be mitigated. One possibility to mitigate is to make known susceptible material non-accessible for the reactor coolant water by covering it with less susceptible materials. One such possibility that has been utilized frequently in the Swedish Boiling Water Reactor (BWR) fleet is in-lay welding of butt welds in the main circulation and feed water loops with the less susceptible Alloy 82, which has fewer reported failure cases under these conditions. The study focuses on the development of a Factor of Improvement between Alloy 182 and the replacement, Alloy 82 material. As part of this, a disposition curve under conditions relevant for Normal Water Chemistry, NWC, in the Swedish BWRs is presented.

Ingår i:13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems, s. 1353-136397816056005989781605600598

Av författaren/redakt...: Efsing, Pål, 196 ...; Forssgren, Björn; Bengtsson, Bengt; Jonsson, Alf; Jenssen, Anders; Sundberg, Johan; visa fler...; Jansson, Christe ...; visa färre...

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