Degradation Characteristics of O-rings on Highly Aged GIS
Abstract
Owing to increasing number of highly aged GIS, the investigation of the remaining lifetimes of those systems are becoming more important. Because a lot of O-rings are used in GIS, the study of degradation mechanism and lifetime estimation method of O-ring is essential. In this paper, the information about O-ring degradation mechanism is described, and the statistical method for estimating the remaining lifetime of O-ring is proposed. The degradation of O-ring is mainly subject to chemical reactions triggered by oxygen. Because there are many factors influencing those chemical reactions, the dispersion of degradation rates of O-rings in GIS is very large. Consequently the statistical analysis is one of the effective techniques for lifetime estimation of O-rings in GIS.
- Publication:
-
IEEJ Transactions on Power and Energy
- Pub Date:
- 2005
- DOI:
- 10.1541/ieejpes.125.322
- Bibcode:
- 2005IJTPE.125..322M
- Keywords:
-
- highly aged GIS;
- O-ring;
- degradation;
- rubber