Eleventh interim status report: Model 9975 O-Ring fixture long-term leak performance
A series of experiments to monitor the aging performance of Viton® GLT O-rings used in the Model 9975 package has been ongoing since 2004 at the Savannah River National Laboratory. One approach has been to periodically evaluate the leak performance of O-rings being aged in mock-up 9975 Primary Containment Vessels (PCVs) at elevated temperature. Other methods such as compression-stress relaxation (CSR) tests and field surveillance are also on-going to evaluate O-ring behavior. Seventy tests using PCV mock-ups were assembled and heated to temperatures ranging from 200 to 450 ºF. They were leak-tested initially and have been tested periodically to determine if they continue to meet the leak-tightness criterion defined in ANSI standard N14.5-97. Due to material substitution, fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 ºF.
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
- Publication Date:
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- Resource Type:
- Technical Report
- Research Org:
- Savannah River Site (SRS), Aiken, SC (United States)
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- Country of Publication:
- United States
- 42 ENGINEERING; GASKETS; LEAKS; PERFORMANCE TESTING; STRESS RELAXATION; COMPRESSION; CONTAINERS; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 0273-0400 K; MONITORING; THERMAL STRESSES; SERVICE LIFE
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