Camparison of indoor radon concentration at Malaysia Nuclear Agency and radionuclide monitoring station, Cameron Highlands, Pahang

Abstract

Abstrak

Kajian ini tertumpu kepada kepekatan radon di dua lokasi kajian yang berbeza iaitu Agensi Nuklear Malaysia, Selangor dan Stesen Pemantauan Radionuklid, Pahang, dan anggaran dos tahunan (dos setara dan dos berkesan) kepada pekerja semasa waktu bekerja. Kaedah kajian menggunakan DOSEman Pro untuk melakukan pengukuran dos sewaktu bekerja dan hujung minggu. Julat kepekatan radon adalah dalam 2.2 – 396.3 Bq/m³. Kepekatan radon adalah tinggi di waktu pagi dan pada hujung minggu berbanding dengan pada waktu petang dan hari bekerja. Hasil kajian menunjukkan julat anggaran dos berkesan dan dos setara tahunan kepada pekerja masing-masing ialah 0.093 – 0.311 mSv and 0.224 – 0.747 mSv. Dos-dos tahunan ini masih rendah dan kurang dari had piawai oleh ICRP, iaitu 10 dan 20 mSv masing-masing untuk dos berkesan dan dos setara.

Abstract

This study focused on the radon concentration at two different study areas which are Malaysia Nuclear Agency, Selangor and Radionuclide Monitoring Station, Pahang, and estimated the annual dose (effective and equivalent dose) to the workers during working hours. Research method used DOSEman Pro to carry out the radon measurement during working hours and weekends. The ranges of radon concentrations were 2.2 – 396.3 Bq/m³. The radon concentration was higher in the morning and weekends compared to the evening and weekdays. Findings show ranges of estimated annual effective and equivalent dose to the workers were 0.093 – 0.311 mSv and 0.224 – 0.747 mSv, respectively. These annual doses were still low and below the standard limit by ICRP, which are 10 and 20 mSv for effective and equivalent dose, respectively.