CONTAINMENT LINER CORROSION

摘要

Of the 104 currently operating nuclear power plants in the U.S, there are 66 plants that have containment buildings constructed with an inner steel liner plate in contact with a thick concrete shell. The steel liner is nominally 6 to 10 mm [0.25 to 0.375 in] thick and is designed in conjunction with the concrete containment building to function as an essentially leak tight barrier against the release of radiation under accident conditions. Corrosion of the containment liner has been observed and corrosion penetration of the liner associated with foreign materials embedded in the concrete from original construction has occurred in a few U.S. plants. This paper reviews plant operating experience, evaluates factors that can affect containment liner corrosion susceptibility, and discusses the mechanisms for through-wall corrosion initiated at the concrete/liner interface.