Aging Evaluation for NPP Cable with XLPE Insulation by using Oxidation Induction Time Measurement Test

There are a lot of cables in the nuclear power plant. The cables, especially inside containment, are exposed in the harsh environment. Those cables may be aged more rapidly due to the high temperature and radiation, and the life time of them may be shorter. If the life time of the cables in the harsh environment is expired due to the rapid aging, those cables should be replaced immediately. For the replacement in the appropriate time before the end of life time, we should perform the frequent condition monitoring of the cable. Among the many method of condition monitoring, we used the oxidation induction time (OIT) measurement test method because the polymer aged by means of chemical reactions with oxygen. Especially, in this paper, we analyze the OIT value affected by thermal and radiation aging