SAVY-4000 O-Ring and Filter Lifetime Extension Report

Technical Report · Mon Jul 30 00:00:00 EDT 2018

DOI:https://doi.org/10.2172/1463513· OSTI ID:1463513

Welch, Cynthia F. ^[1]; Weis, Eric ^[1]; Smith, Paul Herrick ^[1]; Stone, Timothy Amos ^[1]; Reeves, Kirk Patrick ^[1]; Karns, Tristan ^[1]; Oka, Jude M. ^[1]; Keller, Jennie ^[1]; Herman, Matthew Joseph ^[1]; Weaver, Brian Phillip ^[1]; Adams, Jillian Cathleen ^[1]; Trautschold, Olivia Carol ^[1]; Van Buskirk, Caleb Griffith ^[1]; Garcia, Michael David ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The 3-year accelerated aging study of the SAVY-4000 O-ring detailed in our previous Lifetime Extension Report showed very little evidence of significant degradation to samples subjected to aggressive elevated temperature and radiation conditions. Whole container thermal aging studies followed by helium leakage testing and compression set measurements were used to establish a failure criterion estimate for O-ring compression set of ≥ 65 %, which led to an O-ring lifetime estimate of greater than 65 years at 80°C. Herein, we describe a statistical model of the 3-year accelerated aging study and present additional results gathered in FY17 that further support the lifetime extension of the O-ring to 40 years at 80°C. Because we are choosing an extremely conservative lifetime value (40 years) compared to the aging study results (>65 years), the O-ring lifetime could be extended further, especially if supported by surveillance results collected over the years to come.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1463513
• Report Number(s): LA-UR-17-29435
• Country of Publication: United States
• Language: English