The Model 9975 shipping package specifies the materials of construction for its various components. With the loss of availability of material for two components (cane fiberboard overpack and Viton® GLT O-rings), alternate materials of construction were identified and approved for use for transport (softwood fiberboard and Viton® GLT-S O-rings). The shipping packages are part of a long-term storage configuration at the Savannah River Site (SRS). Therefore, additional testing is in progress to verify satisfactory long-term performance of the alternate materials under storage conditions. The test results to date can be compared to results on the original materials of construction to draw preliminary conclusions on the performance of the replacement materials.

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