Spatial Distribution of Terrestrial Nuclear Radiation Dose Rate in Manado City Muzdalifa A. Madusila , Asri Arbie , Adinda Putri Balqis Mokodongan, Syafril Agustion Tomayahu4, Melki Hasan,Siti Sarah Dayanun, Elma Annisa Sari
Universitas Negeri Gorontalo
Abstract
This study was conducted to examine the spatial distribution pattern of terrestrial nuclear radiation dose rates in Manado City for each community activity area. This study aims to determine the level of radiation dose rates and their spatial distribution patterns by utilizing Python. The research method was carried out through direct measurements using a Pocket Geiger Type 6 (POKEGA) at 73 observation points determined based on a 500 m x 500 m grid. Data were recorded automatically in CSV and KML formats. The results showed that all radiation dose rates measurement zones were in the safe category zone (≤- 1 mSv/y), with no high radiation zones that endanger the community or the environment. The maximum radiation dose rates was 0.063 mSv/h or 0.555 mSv/y, while the minimum value was 0.04125 mSv/h or 0.36135 mSv/y. The radiation dose rates values in residential areas range from 0.438 - 0.7008 mSv/y, reclamation areas 0.0876 - 0.3504 mSv/y, coastal areas 0.0876 - 0.7008 mSv/y, fish ports/auctions 0.5256 mSv/y, harbors 0.5256 mSv/y, campuses 0.2628 - 0.5256 mSv/y, markets 0.3504 mSv/year, rivers 0.2628-0.438 mSv/y, and hospitals 0.6132 mSv/y. Although there are small variations in radiation dose rates between different zones, the radiation dose rates is small from the safe limit of 1 mSv/y, so it can be concluded that all research coverage areas in Manado city are safe areas or do not show any radiation hazards to the community or the environment.
