수직 배열된 원전 케이블 트레이 내부 누설전류에 의한 전자파 장해 분석

Abstract

An analytical interpretation of the electromagnetic interference between open cable trays vertically placed in a nuclear power plant is presented using a mode-matching method. The cable trays were modeled by considering the various structural parameters. Subsequently, the electric and magnetic fields and the electromagnetic sources were derived using the Helmholtz equation in conjunction with the superposition principle. After dividing the overall analyzed space into multiple sub-regions, the continuities of the electric and magnetic fields were applied to the interfaces between the sub-regions to compute the modal coefficients included in the electric field expressions. The proposed mode-matching method was verified by checking the convergence of the electric field at certain interesting points and comparing the electric field derived from the mode-matching method with that calculated from a commercial electromagnetic simulator. Furthermore, the electromagnetic interference caused by the type and number of electromagnetic sources, and the distances between the later walls and cable trays were investigated. The results of this study provide valuable information to alleviate the electromagnetic interference between the open cable trays in a nuclear power plant.