Abstract
A major component in the gaseous centrifuge enrichment plant (GCEP) was fluoroelastomer O‐rings, which were used to seal the uranium hexafluoride (UF6) gas system. A program utilizing accelerated test conditions was used to help identify the best material out of four selected candidates and to predict the service life of these materials at GCEP conditions. The tests included accelerated temperatures, mechanical stress, and UF6 exposure. Data were evaluated using the Newman–Keuls1 ranking system to identify the best material and a zero‐order reaction rate equation to help predict service life. This presentation includes a description of the test facility, the materials tested, the types of tests, objectives of the study, service life predictions, and conclusions. The O‐rings are predicted to last ∼30 years , and a high‐molecular‐weight polymer had the best performance ranking.
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