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SCC Growth Behavior Of Stainless Steels And Nickel-Base Alloys During Chemical Transients In BWR NWC Environments

Product Number: 51321-17008-SG
Author: Xiaoyuan Lou; Robert Carter; Raj Pathania
Publication Date: 2021
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IGSCC of both stainless steels and nickel-based alloys (especially in the cold worked or sensitized condition) is very sensitive to aggressive anions like chlorides and sulfates, which can be introduced into the reactor cooling system during periods of significant condenser in-leakage or other incidents. This paper summarizes a two-year EPRI project to evaluate the effects of chloride and sulfate transients at 5 ppb, 20 ppb, and 100 ppb on the SCC growth behavior of cold-worked austenitic stainless steel and as-welded nickel-base Alloy 182 in boiling water reactor (BWR) normal water chemistry (NWC) environments. The main purpose of this research was to provide
data to support the revision of EPRI BWR SCC disposition models during chemical transients.

IGSCC of both stainless steels and nickel-based alloys (especially in the cold worked or sensitized condition) is very sensitive to aggressive anions like chlorides and sulfates, which can be introduced into the reactor cooling system during periods of significant condenser in-leakage or other incidents. This paper summarizes a two-year EPRI project to evaluate the effects of chloride and sulfate transients at 5 ppb, 20 ppb, and 100 ppb on the SCC growth behavior of cold-worked austenitic stainless steel and as-welded nickel-base Alloy 182 in boiling water reactor (BWR) normal water chemistry (NWC) environments. The main purpose of this research was to provide
data to support the revision of EPRI BWR SCC disposition models during chemical transients.