1. An Application of the Residual Voltage for Diagnoses for Detecting Irradiated Degradation of Insulating Materials
- Author
-
Takashi Kabeya, Waichiro Kawakami, Masayuki Ieda, Masayuki Ito, Sanshiro Yamanaka, Goro Sawa, and Tadashi Fukuda
- Subjects
Materials science ,business.industry ,Nuclear engineering ,Discharge current ,Electrical engineering ,Energy Engineering and Power Technology ,Test method ,Dielectric ,law.invention ,Reliability (semiconductor) ,law ,Nondestructive testing ,Residual voltage ,Nuclear power plant ,Diagnostic technology ,Dielectric loss ,Irradiation ,Electrical and Electronic Engineering ,Medical diagnosis ,business ,Degradation (telecommunications) - Abstract
Electrical cables in nuclear power generating stations must be highly reliable. For further improvement of reliability, the development of nondestructive diagnoses seems desirable for cable maintenance. The authors have been studying residual voltage for developing a diagnosis of electrical cables. The purpose of this paper is to give a foundation for development of diagnostic technology for detecting the irradiated degradation; the relations between γ-irradiation dose and the leakage current, the discharge current, and the residual voltage were studied and attempts made to calculate the amount of polarized charge and characteristic dielectric relaxation times by using data on the residual voltage. The calculated results agreed with the results obtained from the leakage current and the discharge current. These results suggest that the residual voltage in diagnostic technology for detecting the irradiated degradation can be employed.
- Published
- 1990
- Full Text
- View/download PDF