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Power Plant Damage Due to Collapse of Underground Cooling Pipes

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Intergranular Stress Corrosion Cracking in Nuclear Power Plant Reactor Components

In this project, APTECH performed a detailed evaluation of the propensity for intergranular stress corrosion cracking (IGSCC) of Inconel 600 components in nuclear power plants (Boiling Water Reactors). These particular components, the thermal sleeve and safe end, had shown significant cracking at other plants prior to start-up. Plant management decided to remove and replace the components prior to start-up. APTECH performed an historical document review to establish the necessity for such action, and evaluated the likelihood of IGSCC in existing and alternate materials. APTECH also provided deposition and trial testimony for this project.

Satish Almaula		Plant failure and root cause analysis; process and design engineering analysis; process technology development and testing; plant engineering, operations, maintenance and safety management; plant and process control system management.

Geoffrey Egan, Ph.D.		Engineering mechanics, welding engineering, stress and fatigue analysis, risk analysis, nondestructive examination, project management.

Michael Cronin, P.E.		Stress analysis, design evaluation, engineering mechanics