Rack design analyses for loading Pu-glass cans in Can-in-Canister demonstration. Revision 1

The Can in Canister (CIC) demonstration program is designed to demonstrate a concept for immobilization of surplus plutonium (Pu). This program will include special cold (non-radioactive) runs in the Defense Waste Processing Facility (DWPF) of the Savannah River Site (SRS) within a schedule window before the start of radioactive operations. Two steel racks were designed to hold eight cans and twenty cans of surrogate Pu glass. The loaded rack will be inserted into a 24-inch OD (outer diameter) DWPF canister pre-cut at the top. After the top of the canister is re-welded, the assembly will be transported to S-Area ready for filling with surrogate high level waste glass. The ultimate requirement for the rack design is that the cans of surrogate Pu glass held by the racks should not interfere with the surrogate high level glass stream during filling. Therefore, acceptance criteria for lifting and transport conditions require that the racks maintain their as designed (built) shapes when they are placed in S-Area for filling. During filling, the racks must maintain their load carrying capacity against collapse mainly due to the softening of material tensile properties at the very high temperatures. Stress analyses of racks loaded with surrogate Pu glass cans were performed as part of the CIC program to ensure that these acceptance criteria are met. This report will describe the materials of construction of the racks in Section 2. The stress analysis methodology which includes the modeling and acceptance criteria is detailed in Section 3. Results are reported in Section 4 and are discussed in Section 5