MEASUREMENT OF EXTREMELY LOW FREQUENCY (ELF) MAGNETIC FLUX IN THE VICINITY OF THEOVERHEAD HIGH VOLTAGE TRANSMISSION LINE IN UNIVERSITI KEBANGSAAN MALAYSIA

  • Faizal Mohamed, Assoc Prof. Dr. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
  • Irman Abdul Rahman, Assoc Prof. Dr. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
  • Ngu Thieng Kui School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
  • Firdaus Pozi School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
  • Syazwani Mohd Fadzil, Dr. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
  • Amran Ab. Majid, Prof. Dr. Office of Occupational Safety and Health, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia
  • Muhammad Samudi Yasir, Assoc Prof. Dr. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
  • Shahidan Radiman, Prof. Dr. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia
Keywords: Magnetic flux density, extremely low frequency (ELF),, overhead high-voltage transmission lines, Kruskal-Wallis Test

Abstract

ABSTRACT

Electricity has become one of the necessities for human daily activities. The presence of electric current produces electromagnetic fields (EMF) at extremely low frequency (ELF). The problem arises when scientists suggests a possible connection between ELF exposure to human health and safety. Concerned about the safety and health of students and staff, Universiti Kebangsaan Malaysia (UKM) took the initiative to identify possible ELF sources and measure their exposure in various locations around the UKM main campus in Bangi. This paper reports the results obtained from the monitoring of the magnetic flux density at three identified locations in the vicinity of the overhead high-voltage transmission line which transverses the university compound and compare the maximum value results with the exposure limit suggested by the International Committee on Non Ionising Radiation Protection (ICNIRP) for ELF. Measurements were done with an (Extech) Three Axis Electromagnetic Field (EMF) Meter (Model 480826) to determine the magnetic flux density. The lateral profile method was applied as the standard measurement methodology. Results showed that the maximum value of the magnetic flux density was 12.5 mG, which is below the suggested ICNIRP public exposure limit of 1000 mG, or in percentage ratio, 1.25% of ICNIRP public exposure limit. Results from the statistical Kruskal-Wallis test showed that there is a significant difference in the distributions of the magnetic flux densities at the different locations (P < 0.05). In conclusion, the measured locations are still safe for people in short-term exposure. However, long-term exposure measurements still need to be done to provide concrete data on the ELF-emission levels in UKM.

 

ABSTRAK

Tenaga elektrik telah menjadi satu keperluan harian bagi manusia. Kehadiran arus elektrik akan menghasilkan medan elektromagnet (EMF) pada julat frekuensi lampau rendah (ELF). Masalah timbul apabila ahli sains mencadangkan bahawa terdapat hubungan di antara dedahan ELF dengan kesihatan dan keselamatan manusia. Berdasarkan hubungan itu, Universiti Kebangsaan Malaysia mengambil langkah untuk mengenal pasti sumber dan mengukur dedahan ELF di lokasi-lokasi di kampus utama UKM di Bangi. Kajian ini melaporkan dapatan tinjauan ketumpatan fluks magnet di tiga kawasan berhampiran kabel voltan tinggi laluan atas yang merentasi kawasan UKM dan membandingkan nilai tertinggi yang diperoleh dengan had dedahan ELF yang dicadangkan oleh International Committee on Non Ionising Radiation Protection (ICNIRP). Alat (Extech) Three Axis Electromagnetic Field (EMF) Meter (Model 480826) digunakan untuk mengukur ketumpatan fluks magnet dengan kedudukan titik pengukuran ditentukan melalui kaedah profil sisi. Hasil menunjukkan bahawa nilai tertinggi ketumpatan fluks magnet adalah 12.5 mG, yang masih berada di bawah nilai had dedahan ICNIRP bagi orang awam iaitu 1000 mG, atau dalam nisbah peratus, 1.25% dari had dedahan ICNIRP. Ujian statistik Kruskal-Wallis menunjukkan terdapat perbezaan beerti dalam taburan nilai ketumpatan fluks magnet pada lokasi yang berlainan (P < 0.05). Berdasarkan hasil kajian, boleh disimpulkan bahawa lokasi yang dipantau masih selamat untuk orang awam dalam jangka-masa pendek. Walau bagaimanapun, kajian yang mengambil kira tempoh dedahan dengan masa yang lebih panjang perlu dilakukan untuk memberi maklumat tambahan untuk digunakan sebagai rujukan aras dedahan ELF di kawasan UKM.

Author Biographies

Faizal Mohamed, Assoc Prof. Dr., School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia

Head of Programme

Syazwani Mohd Fadzil, Dr., School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia

Senior Lecturer

Amran Ab. Majid, Prof. Dr., Office of Occupational Safety and Health, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia

Director OSHA

Muhammad Samudi Yasir, Assoc Prof. Dr., School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi,Selangor, Malaysia

Head Programme

Published
2017-12-30
How to Cite
Mohamed, F., Abdul Rahman, I., Kui, N., Pozi, F., Mohd Fadzil, S., Ab. Majid, A., Samudi Yasir, M., & Radiman, S. (2017). MEASUREMENT OF EXTREMELY LOW FREQUENCY (ELF) MAGNETIC FLUX IN THE VICINITY OF THEOVERHEAD HIGH VOLTAGE TRANSMISSION LINE IN UNIVERSITI KEBANGSAAN MALAYSIA. JOURNAL of NUCLEAR and Related TECHNOLOGIES, 14(2), 1-10. Retrieved from http://jnrtmns.net/index.php/jnrt/article/view/8
Section
Articles