Inconsistências regulatórias na calibração de instrumentos de medição: uma análise comparativa das normas da cnen

Abstract

This study provides a critical analysis of the Brazilian Nuclear Energy Commission (CNEN) standards regarding the calibration of measurement instruments used in radiological protection practices. The research is a documental and descriptive study with a qualitative approach, based on a comparative examination of eleven technical standards issued between 2013 and 2025. Results indicate significant inconsistencies in calibration frequency, with a predominance of the biennial interval (75% of standards), yet lacking clear technical justification. The omission of calibration directives in key standards, such as NN 3.01, compromises regulatory uniformity. The findings underscore the need for regulatory harmonization and the establishment of evidence-based calibration criteria aligned with international best practices in radiological metrology. This article advances the discussion on radiological safety, emphasizing the role of traceable calibration in ensuring measurement reliability and effective radiological protection.