Tenth interim status report: Model 9975 O-ring fixture long-term leak performance | |
Daugherty, W. L.1  | |
[1] Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL) | |
关键词: K-area; Viton; service life; | |
DOI : 10.2172/1214166 RP-ID : SRNL-TR--2015-00205 PID : OSTI ID: 1214166 |
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美国|英语 | |
来源: SciTech Connect | |
【 摘 要 】
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 temperatures. 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 ?��F. 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 ?��F.
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