ABSTRAK
Studi ini melaporkan kegiatanproteksiradiasidiInstalasi Radioterapi RSUD Dr. Moewardi pada Januari 2016. Kegiatan ini dilakukandengan pengukuran serta perhitungan simulasi komputer. Berdasarkan Nilai Batas Dosis (NBD) sebagaimana tercantum dalam Peraturan Kepala Badan Pengawas Tenaga Nuklir No. 4 Tahun 2013, hasil pengukuran menyatakan bahwa laju dosis di Instalasi Radioterapi RSUD Dr. Moewardi berada dalam keadaan aman. Pekerja radiasi menerima laju dosis kurang dari  20 mSv/tahun selama 5 tahun berturut-turut serta 50 mSv dalam 1 tahun tertentu dan anggota masyarakat menerima laju dosis kurang dari 1 mSv/tahun. Simulasi komputer dengan software MCNPX dimaksudkan agar pengukuranlaju dosisdapatdilakukan kapanpun tanpa  terpapar radiasi.Kesalahan error simulasi dan pengukuran lebih besar dari 10%. Simulasi dengan sumber disk memiliki kesalahan relatif yang lebih kecil dibandingkan dengan sumber titik yaitu 14 % sampai 38 %.
Kata kunci: Proteksi radiasi, Jaminan proteksi radiasi, Laju dosis
ABSTRACT
This study reported the radiation protection activity in Radiotherapy Installation of Dr. Moewardi Local General Hospital in January 2016. This activity was conducted by measuring and calculating computer simulation. Considering the Dose Margin Value (NBD) as included into Chairman of Nuclear Power Overseeing Agency’s Regulation No. 4 of 2013, the result of measurement stated that dose rate in Radiotherapy Installation of Dr. Moewardi Local General Hospital was in safe condition. Radiation workers received dose rate less than 20 mSv/year for 5 successively years and 50 mSv in one certain year and the member of society received dose rate less than 1 mSv/year. Computer simulation with MCNPX was intended to allow the dose rate measurement any time without radiation exposure. The relative error of simulation and measurement was more than 10%. Simulation with disk source had less relative error than point source, ranging between 14% to 38%.
Keywords: Radiation protection, radiation protection guarantee, dose rate