Electromagnetic Field Propagation and Indoor Exclusion Zone Analysis in a Nuclear Power Plant

Jang, Doyoung; Youn, Sangwoon; Park, Jong-Eon; Choo, Jaeyul; Choo, Hosung

doi:10.1109/temc.2020.2970471

Cited by 6 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, we found that the envelope of the received power curve is very similar to the gain curve in the LoS direction according to the altitude h. The envelope of the received power gradually decreases due to the weak radiation pattern of the transmitting antenna in the tail direction of the rocket when the rocket's altitude increases. Figure 10 describes the received power intensity and phase differences between direct and reflected rays, which can be written as Equations ( 2) and (3), respectively [22]:…”

Section: Verification Using Ray Analysismentioning

confidence: 99%

See 1 more Smart Citation

Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

et al. 2020

Self Cite

View full text Add to dashboard Cite

This article investigates a novel estimation method to optimize the position of a relay station of the S-band telemetry system in outdoor environments. To determine an optimal relay station position, complex terrain surface and buildings near the Naro Space Center are included in the EM (Electromagnetic) simulation. The optimal relay station position is then determined using the estimation method by comparing the path losses from the rocket to the main station and some candidate positions of the relay station. To better understand the path loss, the ray analysis is also conducted, and the result demonstrates that once the rocket altitude to be covered by the relay station is determined, it is possible to find the optimum position of the relay station.

show abstract

Section: Verification Using Ray Analysismentioning

confidence: 99%

“…( ) Figure 10 describes the received power intensity and phase differences between direct and reflected rays, which can be written as Equations ( 2) and (3), respectively [22]:…”

Section: Verification Using Ray Analysismentioning

confidence: 99%

Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…1,2 On the other hand, as digital technology has seen more and more use in NPPs, concerns around electromagnetic (EM) interference caused by this digital equipment have arisen. [3][4][5][6] These concerns relate to maintaining the functionality of digital equipment, which is vital for various safety functions in NPPs, and should be guaranteed in any environment including those where electromagnetic coupling is a risk. As such, adequate precautions are required to reduce the risks of EM coupling negatively affecting digital equipment.…”

Section: Introductionmentioning

confidence: 99%

“…Digital technology has been applied to nuclear power plants (NPPs) because it offers various advantages when operating and maintaining NPPs 1,2 . On the other hand, as digital technology has seen more and more use in NPPs, concerns around electromagnetic (EM) interference caused by this digital equipment have arisen 3–6 . These concerns relate to maintaining the functionality of digital equipment, which is vital for various safety functions in NPPs, and should be guaranteed in any environment including those where electromagnetic coupling is a risk.…”

Section: Introductionmentioning

confidence: 99%

Analysis of decoupling performances of an isolation barrier using a mode‐matching method

Park

Choo

2022

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

This paper uses a mode‐matching method to analyze the decoupling performance of an isolation barrier that prevents electromagnetic interference between cables. After dividing the overall analyzed space into multiple subregions, potential expressions for each subregion were derived using the Laplace equation in conjunction with the superposition principle. The Dirichlet and Neumann boundary conditions were then applied to the interfaces between subregions to compute the modal coefficients in the previously derived potential expressions. Based on the electric‐field strengths and distributions used in our testing, the geometrical parameters and voltage conditions were varied to find the optimal configuration of the isolation barrier and cables that maximize decoupling performance. The performed study is novel and informative in that the analysis results provide the electromagnetic background to determine the distances between cables separated by an isolation barrier in industrial facilities such as nuclear power plants.

show abstract

“…실제 환경에서 수신되 는 신호는 발사체와 제어동 사이에 가시선(line-of-sight: LoS)을 따라 전달되는 직접 경로(direct path)와 지형이나 건물들에 의해서 한 번 이상 굴절이나 회절이 발생한 뒤 전달되는 간접경로(indirect path)로 구분된다. 여기서, 총 수신전력은 식 (1)과 같이 직접경로로 전달되는 신호와 간접경로로 전달되는 신호의 합으로서 나타낼 수 있다[20],[21]…”

unclassified

Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Jang,

Wang,

Kim

et al. 2022

J. Korean Inst. Electromagn. Eng. Sci.

Self Cite

View full text Add to dashboard Cite

In this study, we propose a method for predicting the characteristics of radio wave scattering based on the environment around the projectile transmitting information through a telemetry communication channel. Terrain and buildings are included in the integrated simulation model to analyze the wave propagation characteristics around the projectile. The propagation path between the projectile and control tower is investigated by observing both the direct and indirect paths. The simulation results show that the received power of the indirect path is 7.6−8 dB lower than that of the direct path, which indicates that the structures around the projectile have a greater effect on the received power than the terrain. To verify these results, the measurement equipment is placed at the Naro Space Center and the consequent path loss between the transmitter and receiver is measured. The received powers measured in reference to the transmitter position are between -77.3 dBm and -70.5 dBm (transmitted power of 20 dBm), which is in good agreement with the simulation data.

show abstract

Electromagnetic Field Propagation and Indoor Exclusion Zone Analysis in a Nuclear Power Plant

Cited by 6 publications

References 17 publications

Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

Analysis of decoupling performances of an isolation barrier using a mode‐matching method

Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Contact Info

Product

Resources

About