A study of validation of condition monitoring method of NPPs cable through volume electrical resistivity

In-Yong Kim, Cheol-Soo Goo, Jung‐Hoon Lee, Beom-soo Jin, Myeong-Kyun Kang, Yong-Deok Shin
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引用次数: 3

Abstract

The accelerated thermal aging of CSPE(chloro sulfonate polyethylene) of test cables were carried out for the period equal to 20, 40, 60, 80 and 100 years in air at 100, 110 and 120□, respectively. The CSPE cables (TAIHAN electric wire Co. Ltd) were used as starting materials. Condition monitoring methods of the accelerated thermal aging of CSPE cables were estimated through EAB (elongation at break) of IEC 62582, and those were newly estimated through volume electrical resistivity. A validated estimation of the new condition monitoring method of the accelerated thermal aging of CSPE cables was conducted by EAB, apparent density, FE-SEM(field emission scanning electron microscope), XPS(x-ray photoelectron spectroscopy) and WD-XRF (wavelength dispersive x-ray fluorescence). The activation energy of NPPs cable is calculated by σ = σ·e-Ea/RT formula through volume electrical resistivity. It is considered that life-time of CSPE cable can be predicted through volume electrical resistivity if CSPE jacket was aged for period such as more than 100 years.
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核电厂电缆体积电阻率状态监测方法的验证研究
试验用CSPE(氯磺酸聚乙烯)电缆在100、110和120℃的空气中分别进行了20、40、60、80和100年的加速热老化试验。以泰汉电线有限公司的CSPE电缆为原料。采用IEC 62582的EAB(断裂伸长率)法估算CSPE电缆加速热老化的状态监测方法,采用体积电阻率法估算CSPE电缆加速热老化的状态监测方法。通过EAB、表观密度、场发射扫描电镜(FE-SEM)、x射线光电子能谱(XPS)和波长色散x射线荧光(WD-XRF)对CSPE电缆加速热老化状态监测新方法进行了验证。核电厂电缆的活化能由体积电阻率公式σ = σ·e-Ea/RT计算得到。认为CSPE护套老化100年以上时,可以通过体积电阻率预测CSPE电缆的寿命。
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