Abstract
Although the quality assurance guideline for the cables used for the safety and protection systems of nuclear power plants is given by IEEE Standards 323 and 383-1974, in addition, it is important to clarify the aging process under the complex environment of heat and radiation and the equivalence of the accelerated aging test of insulating materials. The authors performed the sequential (H.T-..gamma.. or ..gamma..-HT) and simultaneous (..gamma.., HT) application of respective aging factors of heat and radiation to non-additive low density polyethylene films by changing dose rate as the first stage, to clarify the dose rate dependence of the aging. They mainly investigated the dielectric properties, and forwarded investigation based on the change of carbonyl group by infrared spectrometry and residual free radicals by ESR analysis. In the samples irradiated with ..gamma..-ray only and those irradiated with ..gamma..-ray after thermal treatment for 7 hours at 90 deg C, the absorption coefficient ..cap alpha.. of carbonyl group increased with dose in the range from 3 Mrad to 60 Mrad, and both samples showed approximately the same ..cap alpha.. value. The ..cap alpha.. value of the samples thermally treated after irradiation was larger than that of the samples treated in the reverse
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Nakamura, Shuhei;
Murabayashi, Fumio;
Sawa, Goro;
[1]
Yamaguchi, Shinji;
Ieda, Masayuki
- Mie Univ., Tsu (Japan)
Citation Formats
Nakamura, Shuhei, Murabayashi, Fumio, Sawa, Goro, Yamaguchi, Shinji, and Ieda, Masayuki.
Degradation of electrical insulation of polyethylene under thermal and radiation environment, (4). [Gamma radiation].
Japan: N. p.,
1982.
Web.
Nakamura, Shuhei, Murabayashi, Fumio, Sawa, Goro, Yamaguchi, Shinji, & Ieda, Masayuki.
Degradation of electrical insulation of polyethylene under thermal and radiation environment, (4). [Gamma radiation].
Japan.
Nakamura, Shuhei, Murabayashi, Fumio, Sawa, Goro, Yamaguchi, Shinji, and Ieda, Masayuki.
1982.
"Degradation of electrical insulation of polyethylene under thermal and radiation environment, (4). [Gamma radiation]."
Japan.
@misc{etde_6901083,
title = {Degradation of electrical insulation of polyethylene under thermal and radiation environment, (4). [Gamma radiation]}
author = {Nakamura, Shuhei, Murabayashi, Fumio, Sawa, Goro, Yamaguchi, Shinji, and Ieda, Masayuki}
abstractNote = {Although the quality assurance guideline for the cables used for the safety and protection systems of nuclear power plants is given by IEEE Standards 323 and 383-1974, in addition, it is important to clarify the aging process under the complex environment of heat and radiation and the equivalence of the accelerated aging test of insulating materials. The authors performed the sequential (H.T-..gamma.. or ..gamma..-HT) and simultaneous (..gamma.., HT) application of respective aging factors of heat and radiation to non-additive low density polyethylene films by changing dose rate as the first stage, to clarify the dose rate dependence of the aging. They mainly investigated the dielectric properties, and forwarded investigation based on the change of carbonyl group by infrared spectrometry and residual free radicals by ESR analysis. In the samples irradiated with ..gamma..-ray only and those irradiated with ..gamma..-ray after thermal treatment for 7 hours at 90 deg C, the absorption coefficient ..cap alpha.. of carbonyl group increased with dose in the range from 3 Mrad to 60 Mrad, and both samples showed approximately the same ..cap alpha.. value. The ..cap alpha.. value of the samples thermally treated after irradiation was larger than that of the samples treated in the reverse order, and the difference between them increased with the increase of dose. The values of dielectric tangent delta at room temperature and 1 kHz for the samples (..gamma..) and (HT-..gamma..) increased with dose, and were almost the same, but those for the samples (..gamma..-HT) and (..gamma.., HT) were larger than the former two.}
journal = []
volume = {EIM-82:116-125}
journal type = {AC}
place = {Japan}
year = {1982}
month = {Dec}
}
title = {Degradation of electrical insulation of polyethylene under thermal and radiation environment, (4). [Gamma radiation]}
author = {Nakamura, Shuhei, Murabayashi, Fumio, Sawa, Goro, Yamaguchi, Shinji, and Ieda, Masayuki}
abstractNote = {Although the quality assurance guideline for the cables used for the safety and protection systems of nuclear power plants is given by IEEE Standards 323 and 383-1974, in addition, it is important to clarify the aging process under the complex environment of heat and radiation and the equivalence of the accelerated aging test of insulating materials. The authors performed the sequential (H.T-..gamma.. or ..gamma..-HT) and simultaneous (..gamma.., HT) application of respective aging factors of heat and radiation to non-additive low density polyethylene films by changing dose rate as the first stage, to clarify the dose rate dependence of the aging. They mainly investigated the dielectric properties, and forwarded investigation based on the change of carbonyl group by infrared spectrometry and residual free radicals by ESR analysis. In the samples irradiated with ..gamma..-ray only and those irradiated with ..gamma..-ray after thermal treatment for 7 hours at 90 deg C, the absorption coefficient ..cap alpha.. of carbonyl group increased with dose in the range from 3 Mrad to 60 Mrad, and both samples showed approximately the same ..cap alpha.. value. The ..cap alpha.. value of the samples thermally treated after irradiation was larger than that of the samples treated in the reverse order, and the difference between them increased with the increase of dose. The values of dielectric tangent delta at room temperature and 1 kHz for the samples (..gamma..) and (HT-..gamma..) increased with dose, and were almost the same, but those for the samples (..gamma..-HT) and (..gamma.., HT) were larger than the former two.}
journal = []
volume = {EIM-82:116-125}
journal type = {AC}
place = {Japan}
year = {1982}
month = {Dec}
}