|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Utilizing Oxygen Uptake to Predict Lifetimes of Elastomeric O-rings
||Elizabeth Hoffman, William Daugherty, Eric Skidmore
|On-Site Speaker (Planned)
O-rings comprised of Viton elastomer are used to seal the containment vessels in Model 9975 shipping packages and other designs for transport and storage of special nuclear materials. To predict the usable lifetime of the O-rings, accelerated testing using compression stress relaxation at elevated temperature have been utilized. Extrapolating results from elevated temperature accelerated testing provides uncertainty. It must be assumed that the same mechanism for failure in the accelerated tests at elevated temperature applies at application temperatures. Evaluating the elastomer for oxygen uptake at both elevated temperatures and the lower service temperatures, assuming the deterioration of the elastomer is associated with an oxidation reaction, provides confidence that the same degradation mechanism is active. This increases confidence in the extrapolation of results provided through compression stress relaxation tests.