During the regulatory life of the Yucca Mountain High Level Nuclear Waste (HLNW) repository the primary engineered barrier that is to prevent release of radioactive material into the environment is proposed to be a Corrosion-Resistant Material (CRM) outer shell covering the Waste Package (WP) container. The current selection for the CRM is Alloy 22 (UNS N06022), a Ni-Cr-Mo-W-Fe alloy. Alloy 22 forms a defective chromic oxide passive film which results in excellent corrosion resistance; the presence of molybdenum in Alloy 22 offers corrosion resistance in reducing environments as well as oxidizing environments.
Corrosion and anti-corrosives; Nevada – Yucca Mountain; Nickel-chromium alloys; Radioactive waste repositories
Mechanics of Materials | Metallurgy | Nuclear Engineering
Raja, K. S.,
McMillion, L. G.,
Namjoshi, S. A.,
Keeler, R. E.,
Smiecinski, A. J.
Environmental Effects on Corrosion Properties of Alloy 22.
Available at: http://digitalscholarship.unlv.edu/yucca_mtn_pubs/118