| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1568119 | Journal of Nuclear Materials | 2009 | 10 Pages |
Abstract
The chemical and electrochemical conditions within a crevice of Type 316 stainless steel in boric acid-lithium hydroxide solutions under PWR-relevant conditions were modelled with a computational electrochemistry code. The influence of various variables: dissolved hydrogen, boric acid, lithium hydroxide concentration, crevice length, and radiation dose rate was studied. It was found with the model that 25Â ccH2/kg (STP) was sufficient to remain below an electrode potential of -230Â mVshe, commonly accepted sufficient to prevent stress corrosion cracking under BWR conditions. In a PWR plant various operational B-Li cycles are possible but it was found that the choice of the cycle did not significantly influence the model results. It was also found that a hydrogen level of 50Â ccH2/kg (STP) would be needed to avoid substantial lowering of the pH inside a crevice.
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Authors
M. Vankeerberghen, G. Weyns, S. Gavrilov, J. Henshaw, J. Deconinck,