Eleventh interim status report: Model 9975 O-Ring fixture long-term leak performance

Daugherty, W.¹ 

[1] Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

关键词: GASKETS;    LEAKS;    PERFORMANCE TESTING;    STRESS RELAXATION;    COMPRESSION;    CONTAINERS;    TEMPERATURE RANGE 0400-1000 K;    TEMPERATURE RANGE 0273-0400 K;    MONITORING;    THERMAL STRESSES;    SERVICE LIFE;   

DOI  :  10.2172/1288258
RP-ID  :  SRNL--TR-2016-00191
PID  :  OSTI ID: 1288258

学科分类：工程和技术（综合）

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 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 ??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.