scholarly journals Modeling pitting corrosion damage of high-level radioactive-waste containers, with emphasis on the stochastic approach

1993 ◽  
Author(s):  
G.A. Henshall ◽  
W.G. Halsey ◽  
W.L. Clarke ◽  
R.D. McCright
Keyword(s):  
Radioactive Waste ◽  
Pitting Corrosion ◽  
Corrosion Damage ◽  
Stochastic Approach ◽  
High Level Radioactive Waste ◽  
High Level

Corrosion of Stainless Steel for HLW Containers Under Gamma Irradiation

1992 ◽  
Vol 294 ◽  
Author(s):  
K. Osada ◽  
S. Muraoka
Keyword(s):  
Stainless Steel ◽  
Radioactive Waste ◽  
Gamma Irradiation ◽  
Pitting Corrosion ◽  
Electrochemical Method ◽  
Fission Products ◽  
304 Stainless Steel ◽  
Redox Potentials ◽  
High Level Radioactive Waste ◽  
High Level

ABSTRACTThe corrosion behavior of type 304 stainless steel was studied under gamma irradiation as part of the evaluation for the long-term durability of high-level radioactive waste (HLW) disposal containers. Gamma rays, generated from fission products in high-level radioactive waste, are considered to change the environment around the canisters and overpacks. The redox potentials for NaCl solutions and corrosion potentials of stainless steel were measured to consider the effects of gamma irradiation, by using an electrochemical method. The pitting potentials of stainless steel for NaCl solutions were also measured to examine the pitting corrosion under gamma irradiation. As a result of this experiment, it is concluded that the oxidizing properties as a result of the formation of H2O2 and H2 produced by gamma irradiation depended on the concentration of Cl−, and that the strength of oxidizing properties of 1M (mol·dm−3) NaCl solution was particularly high. and the pitting corrosion was found for 1M NaCI solution under gamma irradiation at the dose rate of 2.6×102 C/kg·h (1.0×106 R/h) at 60°C, by using an electrochemical method.

scholarly journals Stochastic Modeling of the Influence of Environment on Pitting Corrosion Damage of Radioactive-Waste Containers

1994 ◽  
Vol 353 ◽  
Author(s):  
Gregory A. Henshall
Keyword(s):  
Radioactive Waste ◽  
Pitting Corrosion ◽  
Chloride Ion ◽  
Corrosion Damage ◽  
Absolute Temperature ◽  
Ion Concentration ◽  
Stochastic Parameters ◽  
Physically Based ◽  
High Level ◽  
Pit Initiation

AbstractA physically-based, phenomenological stochastic model for pit initiation and growth is presented as a potential tool for predicting the degradation of high-level radioactive-waste containers by aqueous pitting corrosion. Included in the model are simple phenomenological equations describing the dependence of the controlling stochastic parameters on the applied (or corrosion) potential, chloride ion concentration, and absolute temperature. Results from this model are presented that demonstrate its ability to simulate several important environmental effects on pitting.

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