DOI QR코드

DOI QR Code

A Study on Properties of Charge & Discharge Current by Degrade in EPR

EPR의 열화에 의한 충.방전 전류 특성에 관한 연구

  • 이성일 (충주대학교 안전공학과)
  • Published : 2008.07.01

Abstract

This paper describes the degraded properties of between the charge and discharge current for ${\gamma}$-ray irradiated in electric power cable rubbers using in nuclear power generating station. The charge and discharge current of degradation in EPR(Ethylene Propylene Rubber), which were irradiated with the radiant capacity of 0.033 Mrad/h, have been measured in order to investigate the influence of the atmosphere(in amount of reinforcing agent, moisture absorption and heat treatment) on electrical properties. When ${\gamma}$-ray were irradiated on the EPR with more reinforcing agent from 4 to 40 Phr, charge and discharge currents was increase due to the amount of reinforcing agent. It was verified that the discharging and charging currents irradiated by ${\gamma}$-ray were higher than those that was not irradiated. The amount of the degraded current was more after moisture absorption than before moisture absorption. The charge and discharge current after heat treatment was similar to that of before heat treatment and it was decreased with the time elapsed. As these properties related with ${\gamma}$-ray irradiation dose, it is suggested that these properties can be utilized as a index of irradiation degradation.

References

  1. S. Yamanaka, T. Fukuda, G. Sowa, M. Leda, M. Ito, and W. Kawakami, 'Ultralow-frequency dielectric properties of EPR with filler', IEEE Trans. DEI., Vol. 27, p. 1073, 1972
  2. S. Yamanaka, T. Fukuda, G. Sowa, M. Leda, M. Ito, and T. Seguchi, 'Effect of filler concenctration on electrical conductivity and ultralow-frequency dielectric properties', IEEE Trans. DEI., Vol. 2, p. 54, 1995 https://doi.org/10.1109/94.368680
  3. R. F. Ohm, 'The Vanderbilt Rubber Hadbook Thirteenth Edition', R. T. Vanderbilt Company, p. 2, 1990
  4. P. R. Nannery, 'Extending the service life of 15 kV polyethylene URD cableusing silicone liquid', IEEE Trans. or Power Delivery, Vol. 4, No. 4, p. 1991, 1989 https://doi.org/10.1109/61.35622
  5. Y. Ebinuma and N. Masui, 'The characteristic of residual charge for water-tree degraded XLPE and the measurement method', IEEJ Trans. FM., Vol. 127, No. 2, p. 108, 2007 https://doi.org/10.1541/ieejfms.127.108
  6. A. T. Bulinski, J. P. Crine, B. Noirhoome, R. J, Densley, and S. Bamji, 'Polymer oxidation and water treeing', IEEE Trans. DEI, Vol. 5, No. 4, p. 558, 1998 https://doi.org/10.1109/94.708273
  7. T. Kumazawa, H. Date, W. Nakagawa, and H. Tsurumaru, 'Characteristic of Bow-tie Water Tree in XLPE Including Contaminants (3)', 1999 National Convntion Record IEE Japan, No. 374(199-3), 1999
  8. T. Kumazawa, W. Nakagawa, and H. Tsurumaru, 'A syudy on behavior of impurities in water-tree', IEEJ Trans. FM, Vol. 124, No. 9, p. 827, 2004 https://doi.org/10.1541/ieejfms.124.827