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연구

Research & Laboratory

제목
세미나 [12/12] Application of Derived Quantities from the Results of General Electrical Tests
작성일
2018.12.12
작성자
전기전자공학부
게시글 내용

< BK21 플러스 BEST 정보기술 사업단 세미나 개최 안내 >


개최일시 : 2018 년 12월 12일 (수) 11:00 ~ 12:00

개최장소 : 제2공학관 B701호

세미나 제목 : Application of Derived Quantities from the Results of General Electrical Tests

내용 :

The safe operation of nuclear facilities is based on the proper condition of information and control (I&amp;C) cables, which have to be capable to fulfil their safety function even during design-based event (DBE). The functionality of nuclear power plant (NPP) cables is tested by the standardised qualification tests. The condition of the core insulation and has high importance from the point of view of reliability ofthese cables. The condition of the insulation can be examined by the measurement of chemical, mechanical or electrical properties. The electrical methods, contrary to chemical and mechanical tests, are non-destructive ones therefore these enable on-site testing. The general electric tests provide information about the general condition of the insulation by the measurement of dielectric properties of insulating material in frequency- (e.g. loss factor measurement) or time-domain (insulation resistance or leakage current and return voltage measurement). However, in many cases these methods provide easily interpretable characteristic properties of the cable insulation, these values cannot be used for reliable condition monitoring because of the weak correlation with the material ageing. Polarization Index (PI) and Dielectric Absorption Rate (DAR) are the simplest derived quantities, which are calculated form the results of insulation resistance measurement, but the application of these values for condition monitoring is also limited.In this study, new quantities are deducted from the results of insulation resistance, loss factor measurement extended voltage response measurement and the correlation with material ageing is tested by a simple regression analysis on EPR insulated of instrumentation and control cables.

 


강연자 성함&직함 / 소속 : Zoltán Ádám Tamus / Associate Professor / Budapest University of Technology and Economics

초청자 : 전기전자공학과 교수 신용준