Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam

Naoshi Hirai; Yoshimichi Ohki

Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam

Naoshi Hirai^*, Yoshimichi Ohki

^*Corresponding author for this work

Kagami Memorial Research Institute for Materials Science and Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The fault location method that the authors are developing possesses a very high spatial resolution. If the characteristic impedance of a cable is changed, for whatever reason, the location method can find its position. In other words, this method can detect the changes in characteristic impedance. Since the characteristic impedance is a function of the permittivity of the cable insulation, this method can detect the change in permittivity of the insulation non-destructively without disassembling the cable. This paper demonstrates the above, taking a 30-m coaxial cable and a 2.5-m safety-related cable for use in a nuclear power plant as two typical examples.

Original language	English
Title of host publication	Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
Publisher	Institute of Electrical Engineers of Japan
Pages	190-193
Number of pages	4
ISBN (Electronic)	9784886864185
Publication status	Published - 2020 Sept 13
Event	2020 International Symposium on Electrical Insulating Materials, ISEIM 2020 - Virtual, Tokyo, Japan Duration: 2020 Sept 13 → 2020 Sept 17

Publication series

Name	Proceedings of the International Symposium on Electrical Insulating Materials
Volume	2020-September

Conference

Conference	2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
Country/Territory	Japan
City	Virtual, Tokyo
Period	20/9/13 → 20/9/17

Keywords

Cable monitoring
Fast Fourier transform
Frequency domain reflectometry
Nuclear power plant
Severe accident

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

Cite this

Hirai, N., & Ohki, Y. (2020). Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam. In Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020 (pp. 190-193). (Proceedings of the International Symposium on Electrical Insulating Materials; Vol. 2020-September). Institute of Electrical Engineers of Japan.

Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam. / Hirai, Naoshi; Ohki, Yoshimichi.
Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020. Institute of Electrical Engineers of Japan, 2020. p. 190-193 (Proceedings of the International Symposium on Electrical Insulating Materials; Vol. 2020-September).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hirai, N & Ohki, Y 2020, Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam. in Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020. Proceedings of the International Symposium on Electrical Insulating Materials, vol. 2020-September, Institute of Electrical Engineers of Japan, pp. 190-193, 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020, Virtual, Tokyo, Japan, 20/9/13.

Hirai N, Ohki Y. Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam. In Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020. Institute of Electrical Engineers of Japan. 2020. p. 190-193. (Proceedings of the International Symposium on Electrical Insulating Materials).

Hirai, Naoshi ; Ohki, Yoshimichi. / Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam. Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020. Institute of Electrical Engineers of Japan, 2020. pp. 190-193 (Proceedings of the International Symposium on Electrical Insulating Materials).

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Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam

Abstract

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Conference

Keywords

ASJC Scopus subject areas

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