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08RTS02 Assessment of Corrosion Based Failure in Stainless Steel Containers Used for the Long-term Storage of Plutonium Based Salts

Picture for 08RTS02 Assessment of Corrosion Based Failure in Stainless Steel Containers Used for the Long-term S
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Product Number: 51300-08RTS02-SG
ISBN: 08RTS02 2008 CP
Author: R. Lillard, D. Kolman, M. Hill, M. Prime, D. Veirs, L. Worl, and P. Zapp
Publication Date: 2008
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This paper summarizes our efforts to assess corrosion related failure in stainless steel longterm storage containers bearing plutonium oxides and electrorefining salts. Pitting corrosion of the internal can wall is believed to occur when these salt particles deliquesce forming the electrolyte necessary for corrosion-electrochemistry. Extrapolation of pit depths from coupon studies using GEV statistics found that the probability of a through-wall corrosion pit is finite; the maximum pit depth after 50 yrs. would be on the order of 1.7 mm where as the container wall is only 1.6 mm thick. To assess susceptibility to environmental cracking fracture toughness (J1C) experiments were used in conjunction with a J-integral diagram constructed using the GE/EPRI method for linear elastic-plastic materials.
This paper summarizes our efforts to assess corrosion related failure in stainless steel longterm storage containers bearing plutonium oxides and electrorefining salts. Pitting corrosion of the internal can wall is believed to occur when these salt particles deliquesce forming the electrolyte necessary for corrosion-electrochemistry. Extrapolation of pit depths from coupon studies using GEV statistics found that the probability of a through-wall corrosion pit is finite; the maximum pit depth after 50 yrs. would be on the order of 1.7 mm where as the container wall is only 1.6 mm thick. To assess susceptibility to environmental cracking fracture toughness (J1C) experiments were used in conjunction with a J-integral diagram constructed using the GE/EPRI method for linear elastic-plastic materials.
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