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KAJIAN BATAS LEPASAN RADIOAKTIVITAS UDARA REAKTOR KARTINI BERDASARKAN ESTIMASI DOSIS PADA KONDISI OPERASI NORMAL
The Kartini Reactor is one of Indonesia’s research reactors that has the potential to release radionuclides into the environment via the air under normal operating conditions. These airborne radioactive releases can result in radiation exposure for the community surrounding the reactor facility; therefore, a radiation safety assessment based on estimated received doses is necessary. This study aims to determine the source term value, model wind direction and speed profiles, and calculate the Total Effective Dose Equivalent (TEDE) resulting from radionuclide releases through the atmosphere under normal operating conditions. The research was conducted based on data from the 2019 Kartini Reactor Safety Analysis Report (LAK) and meteorological data for the 2023–2025 period. Analysis of wind direction and speed profiles was performed using WRPlot View software to obtain the dominant wind direction and speed patterns in the form of a wind rose diagram, while dose calculations were performed using HotSpot 3.0.2 software based on the Gaussian Plume model. The results of the study indicate that the average wind speed is 3.48 m/s, with the dominant wind direction originating from the West-Southwest (WSW) at an azimuth ranging from 236.25° to 258.75°. The highest TEDE value obtained was 0,293 mSv under Type C atmospheric stability conditions (slightly unstable). This value remains below the dose constraint for the public living near nuclear facilities, which is 0,3 mSv. This indicates that the optimized air radioactivity release limit still meets safety criteria based on the dose constraint established by the regulatory body, BAPETEN. Therefore, this air radioactivity release limit is recommended for use as the air radioactivity discharge limit for the Kartini Reactor under normal operating conditions.
FAKULTAS SAINS DAN TEKNOLOGI, UIN SUNAN KALIJAGA YOGYAKARTA
NIM.: 22106020025 Hastin Setia Prabandari
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