Penentuan Aktivitas Spesifik Radionuklida Alam pada Sumber Air Panas di Nagari Pariangan Sumatera Barat
DOI:
https://doi.org/10.25077/jfu.10.3.371-376.2021Abstract
Telah dilakukan penelitian tentang penentuan aktivitas spesifik radionuklida alam pada sumber air panas di Nagari Pariangan Sumatera Barat. Tujuan penelitian ini untuk mengetahui aktivitas spesifik radionuklida 222Rn, 226Ra,232Th dan 40K. Penelitian ini menggunakan sampel air yang diambil dari tiga sumber air yang berbeda. Aktivitas spesifik air diukur menggunakan dua alat yaitu Durridge Rad7 Radon Detector dengan protokol WAT250 untuk radionuklida 222Rn dan menggunakan spektrometer gamma untuk radionuklida 226Ra,232Th dan 40K. Hasil penelitian yang diperoleh berdasarkan pengukuran yaitu nilai aktivitas spesifik222Rn berada pada rentang 1,76-8,42 Bq/L yang menunjukkan bahwa aktivitas spesifik 222Rn berada di bawah ambang batas yang direkomendasikan oleh Environmental Protection Agency (EPA) yaitu 11 Bq/L. Aktivitas spesifik radionuklida 226Ra berada di bawah batasan minimum yang dapat terdeteksi oleh spektrometer gamma yaitu 0,50 Bq/L. Aktivitas spesifik untuk radionuklida 232Th berkisar antara 0,50 ± 0,22 sampai 0,57 ± 0,20 Bq/L dan aktivitas spesifik 40K berkisar antara 1,24 ± 0,49 Bq/L sampai 62,49 ± 6,78 Bq/L. Nilai aktivitas spesifik226Ra,232Th dan 40Kmasih berada di bawah ambang batas yang direkomendasikan oleh PERKA BAPETEN No 9 tahun 2009 tentang intervensi terhadap paparan radiasi yang berasal dari TENORM yaitu 1000 Bq/L untuk 226Ra dan 232Th serta 10.000 Bq/L untuk 40K.
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