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97104 EVALUATION OF WATER CHEMISTRY ON THE PITTING SUSCEPTIBILITY OF ALUMINUM

Picture for 97104 EVALUATION OF WATER CHEMISTRY ON THE
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Product Number: 51300-97104-SG
ISBN: 97104 1997 CP
Author: G. T. Chandler, R. L. Sindelar, P.S. Lam
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Aluminum-clad spent nuclear fuels are being stored in water in the Receiving Basin for Off-site Fuels (RBOF) and the reactor disassembly (cooling) basius at the Savannah River Site (SRS). Experience shows that fuels stored in water are subject to rapid pitting corrosion if the water quality is poor. Upgrade projects and actions, including those to improve water quality, were recently undertaken to upgrade the disassembly basins for extended storage. A technical strategy was developed for continued basin storage of aluminum-clad fire assemblies. The strategy includes development and implementation of basin technical standards for water quality to minimize attack due to pitting corrosion over a desired storage period. In the absence of localized corrosion, only slow, general corrosion of the cladding would be expected. A laboratory corrosion program is being performed to provide the bases for technical standards by identifying the region of “aggressive” water qualities where existing oxide films would tend to break down and pits would initiate and remain active. Initial results horn corrosion potential and cyclic polarization testing of aluminum alloys in various water chemistries have shown that low conductivity water...
Aluminum-clad spent nuclear fuels are being stored in water in the Receiving Basin for Off-site Fuels (RBOF) and the reactor disassembly (cooling) basius at the Savannah River Site (SRS). Experience shows that fuels stored in water are subject to rapid pitting corrosion if the water quality is poor. Upgrade projects and actions, including those to improve water quality, were recently undertaken to upgrade the disassembly basins for extended storage. A technical strategy was developed for continued basin storage of aluminum-clad fire assemblies. The strategy includes development and implementation of basin technical standards for water quality to minimize attack due to pitting corrosion over a desired storage period. In the absence of localized corrosion, only slow, general corrosion of the cladding would be expected. A laboratory corrosion program is being performed to provide the bases for technical standards by identifying the region of “aggressive” water qualities where existing oxide films would tend to break down and pits would initiate and remain active. Initial results horn corrosion potential and cyclic polarization testing of aluminum alloys in various water chemistries have shown that low conductivity water...
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