Effects of Manufacturing Variables on Performance of High-Level Waste Low Carbon Steel Containers.

摘要

Analytical and experimental research was performed to determine the effect of manufacturing variables on the performance of cast steel overpacks. The work examines the influence of casting and welding process variables on the long-term performance of low carbon steel overpacks in the repository environment. Centrifugal casting was indicated to be the most economical and technically favorable manufacturing approach for cast steel overpacks. A bottom would be welded into a hollow cylinder to make the container and final closure welding to secure the lid in place would be done at the repository. Effects of alloy chemistry, solidification processing, and solid state phase transformations on final microstructure of the cast and welded overpack has been examined in detail in the report. Experimental work focused on material and process combinations to be used in manufacture of overpacks. Practical process limits were explored and changes in microstructure due to repository thermal conditions were investigated.