Pengukuran Konsentrasi Gas Radon (Rn-222) dan Gas Thoron (Rn-220) Menggunakan Detektor CR-39 pada Ruangan Kelas di Kota Lubuk Basung
DOI:
https://doi.org/10.25077/jfu.11.1.113-118.2022Abstract
Telah dilakukan pengukuran konsentrasi gas radon (Rn-222) dan thoron (Rn-220) menggunakan detektor CR-39 pada ruangan kelas di Kota Lubuk Basung. Penelitian bertujuan untuk menentukan data awal konsentrasi gas radon (Rn-222) dan thoron (Rn-220) dalam ruangan, kemudian ditinjau berdasarkan ICRP Publikasi No. 126 tahun 2014. Pengukuran konsentrasi gas radon (Rn-222) dan thoron (Rn-220) menggunakan detektor CR-39 sebanyak 50 buah yang dipasang selama 3 bulan pada 9 lokasi sekolah. Detektor CR-39 selanjutnya dietsa menggunakan larutan NaOH 6,25N selama 7 jam pada suhu 70oC untuk memperjelas jejak partikel alfa dari detektor. Jejak yang terdapat pada CR-39 dibaca menggunakan mikroskop dengan perbesaran 400 kali.  Hasil pengukuran konsentrasi gas radon tertinggi yaitu 135±9,55 Bq/m3 dan terendah yaitu 38±2,65 Bq/m3 dengan rerata pada ruangan kelas yaitu 84,06±5,89 Bq/m3. Konsentrasi gas thoron (Rn-220) tertinggi yaitu 109±7,71 Bq/m3dan terendah yaitu 8±0,57 Bq/m3 dengan rata-rata 61,62±4,38 Bq/m3. Konsentrasi yang didapatkan tidak melebihi rekomendasi ICRP Publikasi No. 126 tahun 2014 sebesar 300 Bq/m3 untuk gas radon dan thoron. ÂReferences
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