Compatibility Studfies of Several Molten Uranium and Thorium Alloys in Niobium, Tantalum, and Yttrium
Abstract
Niobium, tantalum, yttrium, and Inconel have been used to contain molten aluminum, lead, tin, zinc, and several of their respective uranium and thorium alloys for various times up to 3000 hours and at temperatures ranging from 600 to 1100 deg C. Altogether 76 capsule tests were run, almost all in a static isothermal condition. Tantalum showed the best resistance followed by niobium, Inconel, and yttrium respectively. The systems, lead in tantalum and lead in niobium, showed the greatest potentials for possible liquid-metal fuel carrier systems. An alloy of uranium-bismuth-tin contained in tantalum also exhibited promising possibilities. The tabulated test data include a classification of the type of corrosion attack which occurred and a measured value of the amount of corrosive penetration. Each test was also given an arbitrary rating for easy reference comparisons. A number of photomicrographs are included for each set of tests. A background of the advantages and disadvantages of fluid-fuel reactors are compared with those for solid-fuel reactors. Differences between aqueous fuels and liquid-metal fuels are also discussed. The various types of corrosive attack of solid metals by liquid metals are defined and illustrated with several photomicrographs. The variables affecting liquid-metal corrosion attack are given and driving forces for the various types of attack presented. Methods of corrosion inhibition are mentioned. The various criteria for selecting fuel and fertile alloys and suitable container materials were also considered.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1964
- Accession Number
- ADA397550
Entities
People
- Merl R. Core
- Ray M. Fisher
- Robert J. Cash
Organizations
- Iowa State University