TY - JOUR
T1 - The electrochemistry in 316SS crevices exposed to PWR-relevant conditions
AU - Vankeerberghen, Marc
AU - Weyns, Gert
AU - Gavrilov, Serguei
AU - Henshaw, Jim
AU - Deconinck, Johan
N1 - Score = 10
PY - 2009/4/15
Y1 - 2009/4/15
N2 - 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 25 ccH2/kg (STP) was sufficient to remain below an electrode potential of -230 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 50 ccH2/kg (STP) would be needed
to avoid substantial lowering of the pH inside a crevice.
AB - 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 25 ccH2/kg (STP) was sufficient to remain below an electrode potential of -230 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 50 ccH2/kg (STP) would be needed
to avoid substantial lowering of the pH inside a crevice.
KW - modelling electrochemistry PWR
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_96023
UR - http://knowledgecentre.sckcen.be/so2/bibref/5688
U2 - 10.1016/j.jnucmat.2008.12.175
DO - 10.1016/j.jnucmat.2008.12.175
M3 - Article
SN - 0022-3115
VL - 385
SP - 517
EP - 526
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -