Retrospective Assessment of Calibration Behaviour, Faulty Trends and Durability of Commonly Used Radiation Survey Meters in Nigeria  

作　　者：Olumide Olaife Akerele Samuel Mofolorunsho Oyeyemi Francis Adole Agada Sunday Ufuoma Obarhua Helen Enikpi Alakiu Wasiu Kofoworola Ayuba David Olakanmi Olaniyi Ethel Ebere Ofoegbu Olumide Olaife Akerele;Samuel Mofolorunsho Oyeyemi;Francis Adole Agada;Sunday Ufuoma Obarhua;Helen Enikpi Alakiu;Wasiu Kofoworola Ayuba;David Olakanmi Olaniyi;Ethel Ebere Ofoegbu(National Institute of Radiation Protection and Research, University of Ibadan, Ibadan, Nigeria;Nigerian Nuclear Regulatory Authority, Abuja, Nigeria)

机构地区：[1]National Institute of Radiation Protection and Research, University of Ibadan, Ibadan, Nigeria [2]Nigerian Nuclear Regulatory Authority, Abuja, Nigeria

出　　处：《World Journal of Nuclear Science and Technology》2025年第1期30-44,共15页核科学与技术国际期刊(英文)

摘　　要：Radiation detectors, such as survey meters, are essential for ensuring radiation safety in various sectors, including healthcare, industrial processing, emergency response, etc. However, regular calibration and proper maintenance of survey meters are important in order to ascertain their accuracy and reliability. This study provides a comprehensive retrospective assessment of the calibration behaviour, durability, and fault trends of 160 survey meters, spanning ten different models. They were calibrated at the Secondary Standard Dosimetry Laboratory (SSDL) in Nigeria over a decade (2012-2023) using an X-Ray Beam Irradiator Model X80-225K and Cs-137 irradiator (OB6) with a PTW reference spherical chamber traceable to the IAEA SSDL in Seibersdorf, Austria. The calibration stability of each model was evaluated, revealing that models like Instrument A and Instrument B demonstrated high reliability with calibration factors close to the ideal value of 1, while models like Instrument C exhibited higher variability, suggesting less consistent performance for dose rate monitoring. Fault analysis showed that the most common issues were related to the battery compartment, indicating a need for improved handling practices. Correlation analysis reveals no statistically significant correlation between calibration factor and age of survey meter across the analysed models. The study concludes that regular calibration, proper handling, and user training are crucial for maintaining the accuracy and longevity of radiation detectors.Radiation detectors, such as survey meters, are essential for ensuring radiation safety in various sectors, including healthcare, industrial processing, emergency response, etc. However, regular calibration and proper maintenance of survey meters are important in order to ascertain their accuracy and reliability. This study provides a comprehensive retrospective assessment of the calibration behaviour, durability, and fault trends of 160 survey meters, spanning ten different models. They were calibrated at the Secondary Standard Dosimetry Laboratory (SSDL) in Nigeria over a decade (2012-2023) using an X-Ray Beam Irradiator Model X80-225K and Cs-137 irradiator (OB6) with a PTW reference spherical chamber traceable to the IAEA SSDL in Seibersdorf, Austria. The calibration stability of each model was evaluated, revealing that models like Instrument A and Instrument B demonstrated high reliability with calibration factors close to the ideal value of 1, while models like Instrument C exhibited higher variability, suggesting less consistent performance for dose rate monitoring. Fault analysis showed that the most common issues were related to the battery compartment, indicating a need for improved handling practices. Correlation analysis reveals no statistically significant correlation between calibration factor and age of survey meter across the analysed models. The study concludes that regular calibration, proper handling, and user training are crucial for maintaining the accuracy and longevity of radiation detectors.

关 键 词：Radiation Detectors Survey Meters Calibration Stability Fault Trends Radiation Safety Maintenance Strategies Handling Practices 

分 类 号：R14[医药卫生—公共卫生与预防医学]