Electromagnetic Scattering of Periodic Cabinets in Nuclear Power Plants: Parallel Polarization

Abstract

This paper investigates the scattering characteristics of periodic open cabinets in nuclear power plants using the mode-matching technique. The concept of a parallel-plate waveguide is adopted, and the power conservations at all junctions are confirmed. The incident power is almost equivalent to the summations of the reflected and transmitted powers at all junctions, and the differences in the power for all cases are almost zero. A multiregion problem is systematically applied to resolve the entire scattered fields, and the resulting contour plots for the field strength according to various modal incidences are displayed. Based on this paper, modal field distributions for multilayer cabinet structures can be extensively analyzed. INDEX TERMS Electromagnetic compatibility, mode matching technique, multiregion problem. with The Ohio State University. Since 2016, he has been with Hongik University, where he is currently a Research Professor with the Metamaterial Electronic Device Research Center. His research interests include electromagnetic scattering through aperture, antenna design, and computational electromagnetics.

Electromagnetic Interference Caused by Parasitic Electric-line Current on a Digital Module in a Closed Cabinet

“…Here, we specifically describe the continuity conditions of the tangential E y and H x at z = 0 to derive the simultaneous equations. First, the tangential E y continuity at z = 0 is expressed as (7). By multiplying (7) by sinγ p 1 (x − x 9 ) and then integrating the result with respect to x from x 9 to x 10 , we obtain…”

“…To take precautionary measures against EMI, electromagnetic scattering analysis of an open cabinet has been performed for the event of an external electromagnetic wave with either transverse electric or magnetic mode approaching an open cabinet [4], [5], [7]. However, there have been…”

Electromagnetic Interference Inside the Control System Cabinet of a Nuclear Power Plant From External Wireless Devices

“…Nevertheless, previous research [5], [6], [8] is limited to cases where a too simplified bundle of digital modules is applied or the rear door of the cabinet is usually closed. In practice, however, dozens of digital modules are placed separately in the cabinet, and the rear doors usually have small openings for the passage of cables required to supply electric power or connect the other instruments in the adjacent cabinets.…”

“…The main features of this paper can be summarized as follows: (1) Novelty -The most important point is to analyze the more complicated interior structure of the cabinet. The previous studies [4], [6] simply analyzed the scattered electromagnetic fields for a single bundle of digital modules, when a rear door is closed. In this study, however, separated three and separated four digital modules were considered.…”

Indoor exclusion zone analysis in a nuclear power plant with wirelessHART application

“…Wireless technologies have become increasingly attractive to nuclear power plants (NPPs) since wireless control and monitoring systems can provide easy connectivity to personnel, sensing systems, and wireless data networks while dramatically reducing the wiring costs [1,2,3,4,5]. Although the wireless devices are convenient and efficient when operating in NPPs, the corresponding electromagnetic interference (EMI) of devices should be thoroughly verified whether it is below an acceptable level.…”