Paper Title
Assessment of Safety Distance from Transmission Lines Radiation: A Case Study of Power Lines in OYO State Nigeria

Abstract - The International Commission for Non-Ionizing Radiation Protection (ICNIRP) approved magnetic limits for transmission lines. The "safe distance" from an EMF source is simply the measured distance needed to reduce human exposure to some desired safety levels in most cases. The International Radiation Protection Association (IRPA) recommends measuring the strength of the electrical and magnetic fields for evaluation of the safety distance from transmission lines. Therefore, this research focused and experimentally examined the level of magnetic and electric field radiation from 330Kv, 32Kv, and 33KV lines in Ibadan, Oyo State, Nigeria. The assessment is based on the safety limits recommended by (ICNIRP 1998). In the measurement, the Holaday HI-3604 ELF survey was used to measure the fields in the vicinity of the lines at horizontal distances (0-100m) and vertical distances of 1.5m. The theoretical assessment was used, and the Biot-Savart law was used to estimate the occupational and general public exposure limits based on the comparison of measured power flux density, magnetic fields were estimated. The highest magnetic and electric fields measured from the base of the transmission lines were recorded to be 7.17µT and 6.0V/m, respectively. Thus, at 25m (RoW for 330Kv), the magnetic field is 4.10µT which is about 0.82% for the general public and 0.41% for occupational base on ICNIRP data recommended value. Thus, at 25m (RoW for 330Kv), the electric field is 2.91V/m, which is about 0.58% general public and 0.3% occupational based on ICNIRP data recommended value. Keywords - Power Flux Density, Safety Distance, Magnetic Field, and Electric Field