ANALISIS TINGKAT KEBISINGAN DAN UPAYA PENGENDALIAN PENYAKIT AKIBAT KERJA DI AREA MINING PT. XYZ, SUMBAWA BARAT, NUSA TENGGARA BARAT

Aspek K3 berorientasi menciptakan lingkungan kerja yang aman, nyaman, dan sehat bagi pekerja. Industri pertambangan memiliki tingkat resiko cukup tinggi khususnya terkait kebisingan di tempat kerja yang berasal dari intensitas suara tinggi pada aktivitas penambangan, peledakan, alat, mesin, dan perbengkelan. Penelitian dilakukan di area penambangan PT. XYZ, salah satu perusahaan tambang terbuka yang berlokasi di Sumbawa Barat, Nusa Tenggara Barat dengan pengukuran kebisingan dilakukan dengan metode personal sampling dilakukan menggunakan peralatan Edge 5, dan mengetahui upaya pengendalian kebisingan dengan cara observasi dan wawancara mendalam dengan metode deskriptif kualitatif. Hasil penelitian didapatkan pembagian 12 Similar Exposure Group (SEG) di area mining PT.XYZ dengan hasil pengukuran kebisingan personal menunjukkan rentang 81.1-87 dB dengan SEG tertinggi di area Mine Batch Plant dan terendah di SEG Mine Drill Sampler. PT. XYZ telah melakukan upaya pengendalian kebisingan dengan prinsip hirarki kontrol yaitu eliminasi, substitusi, rekayasa teknik, administrasi, dan alat pelindung diri.Keywords: Kebisingan, K3, Mining, Similar Exposure Group, Hirarki Kontrol ABSTRACTOccupational Health and Safety aspects create a safe and healthy work environment for workers. The mining industry has a high level of risk, especially related to workplaces originating from high noise intensity in mining, explosions, tools, and machinery and workshop activities. The research was conducted in the mining area of PT. XYZ, a company located in West Sumbawa, West Nusa Tenggara Province, was carried out using a private sampling method using Edge 5 equipment, and knowing control efforts by observation and in-depth qualitative descriptive methods. The results showed that there were 12 Similar Exposure Groups (SEG) in the mining area of PT. XYZ. Personal noise dosimetry measurement results showing a range of 81.1-87 dB with the highest SEG in the Mine Batch Plant area and the lowest in the SEG Mine Drill Sampler. PT. XYZ has carried out control efforts with the principles of the control hierarchy, namely elimination, substitution, engineering, administration, and personal protective equipment.Keywords: Noise, OHS, Mining, Similar Exposure Groups, Hierarchy Control

Satellite-Based Personal UV Dose Estimation

Epidemiology and public health research relating to solar ultraviolet (UV) exposure usually relies on dosimetry to measure UV doses received by individuals. However, measurement errors affect each dosimetry measurement by unknown amounts, complicating the analysis of such measurements and their relationship to the underlying population exposure and the associated health outcomes. This paper presents a new approach to estimate UV doses without the use of dosimeters. By combining new satellite-derived UV data to account for environmental factors and simulation-based exposure ratio (ER) modelling to account for individual factors, we are able to estimate doses for specific exposure periods. This is a significant step forward for alternative dosimetry techniques which have previously been limited to annual dose estimation. We compare our dose estimates with dosimeter measurements from skiers and builders in Switzerland. The dosimetry measurements are expected to be slightly below the true doses due to a variety of dosimeter-related measurement errors, mostly explaining why our estimates are greater than or equal to the corresponding dosimetry measurements. Our approach holds much promise as a low-cost way to either complement or substitute traditional dosimetry. It can be applied in a research context, but is also fundamentally well-suited to be used as the basis for a dose-estimating mobile app that does not require an external device.

DOSIMETRY MODELING AND EXPERIMENTAL VALIDATION FOR THE PETALE PROGRAM IN THE CROCUS REACTOR

The PETALE experimental program in the CROCUS reactor intends to provide integral measurements on reactivity worth and dosimetry measurement to constrain nuclear data relative to stainless steel heavy reflectors. The experimental setup consists in eight successive plates of pure iron, pure nickel, pure chromium, or nuclear-grade stainless steel set at the close periphery of the core. The plates are interleaved with up to nine dosimeters that consist of thin activation foils with different possible materials to be sensitive to different ranges of the neutron spectrum. A precise measurement with a good estimation of the uncertainties and correlations is required, especially when comparing reaction rates, e.g. transmission measurement and/or spectral indices. The present work focuses on the validation of the dosimetry technics developed in preparation of this experimental program. Different aspects are discussed: monitors, efficiency calibration, self-absorption correction, self-shielding and nuclear data uncertainties. The different sources of uncertainties for the experiment-calculation comparisons are characterized, taking into account all the correlation between the different dosimeters. These correlations are a mandatory element for the aimed Bayesian assimilation in order to avoir overfitting when considering dosimeter providing a similar information.

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

Passive solid state dosimeters, such as thermoluminescence dosimeters, provide integrated measurement of the total dose and are widely used in environmental monitoring programs. The objective of this paper is to provide a comprehensive review on the use of thermoluminescent dosimetry methods for monitoring radiation dose in the environment. The article presents the part of the research results of the project PREPAREDNESS (EMPIR 2016 call for Metrology for Environment joint research project) with a particular objective to harmonize procedures used by dosimetry services, relevant authorities and Institutes across the Europe. To achieve this, different monitoring routines that are based on passive environ mental dosimetry methods are investigated. Differences in performing specific steps such as preheating, reading, annealing, minimizing fading, and others, are analyzed. The investigation was performed by means of qualitative literature review that showed the lack of information about specific steps. The conclusion of this work is that thermoluminescent dosimetry measurement system has to be type-tested even though the testing procedure is complicated. In addition to this, control dosimeters should be introduced, International Organization for Standardization protocols should be followed during calibration, and finally, parameters influencing the measurement uncertainty have to be identified and well understood in order to pro duce ac cu rate dose measurement results.