Title Development of a Modular Radiometric Measurement System for Radiation Protection /
Translation of Title Modulinės radiometrinės matavimo sistemos sukūrimas radiacinei saugai.
Authors Litvakas, Andrejus
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Pages 59
Keywords [eng] dosimetry ; radiometry ; Geiger-Mueller ; open-source
Abstract [eng] In this research a modular radiometric measurement system was developed using open-source platforms. The system was based on the RZB-04-04 dosimetry gate which was used in nuclear power plants as a personnel checkpoint. The measurement system consists of 16 Arduino-equipped GeigerMueller detector modules (each module having two SBT-10 detectors) that are capable of operating both individually and as a network. The sensitivities of the individual detectors were analyzed using a source of ionizing radiation and calibration coefficients, required for a uniform count rate, were derived from the obtained results. The calibration coefficients for the detectors ranged from 0.8053 to 1.2686 indicating relatively good group operation quality. The 355 Volt optimal voltage required for stable operation of the detectors was determined by investigating the Geiger-Mueller (plateau) region of the detectors. Investigating 4 randomly selected modules the average deadtime of the detectors in the system was determined to be 840.413 µs. The deadtime values ranged from 284.938 µs to 1782.364 µs. Also, a conversion coefficient required for converting count rate to dose rate was derived to be 0.084 µSv/h/CPS and applied to each detector within the software. The software developed for this system, written in python programming language, allows for broad further improvements and additional functionality to be implemented and employed on different platforms. The developed system offers a versatile and customizable solution for radioactivity detection and dosimetry.
Dissertation Institution Kauno technologijos universitetas.
Type Master thesis
Language English
Publication date 2023