首页|Reproducing shadow corrosion on Zircaloy-2 using in-situ proton irradiation
Reproducing shadow corrosion on Zircaloy-2 using in-situ proton irradiation
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NSTL
Elsevier
The shadow corrosion phenomenon has been an unsolved issue for many decades now. Its unique occurrences were only observed in Boiling Water Reactors (BWRs). In the reactor setting, the use of Ni-based alloys or stainless steel near Zircaloy-2 cladding or fuel channel causes localized enhanced corrosion of the zirconium alloy at the contact point or where the two dissimilar metals are in close proximity. Under the radiation field, a galvanic coupling phenomenon has been identified as the governing mechanism for shadow corrosion. This form of corrosion, however, has not been successfully replicated outside of the reactor environment. In-situ proton irradiation-corrosion experiments were carried out to replicate a shadow on Zircaloy-2 with an electrically coupled Ni alloy. The precise control of proton flux and estimated hydrogen peroxide concentration, as well as comprehensive oxide thickness measurements, were used to develop an empirical model for shadow corrosion under neutron irradiation.
Wang P.、Was G.S.、Nowotka K.
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Nuclear Engineering and Radiological Sciences University of Michigan
NSTL
Elsevier
