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An application of the residual voltage for diagnoses for detecting irradiated degradation of insulating materials
Author(s) -
Yamanaka Sanshiro,
Kabeya Takashi,
Fukuda Tadashi,
Sawa Goro,
Ieda Masayuki,
Ito Masayuki,
Kawakami Waichiro
Publication year - 1991
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391110701
Subject(s) - residual , materials science , irradiation , voltage , high voltage , degradation (telecommunications) , medical diagnosis , dielectric , electrical engineering , nuclear engineering , reliability engineering , electronic engineering , optoelectronics , computer science , engineering , physics , algorithm , nuclear physics , medicine , pathology
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.