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Analysis of the procedures and criteria for implantation of X-ray beams for ISO 4037 reference at low energies; Analise dos procedimentos e criterios de implantacao de feixes de raios X de referencia ISO 4037 em baixas energias

Abstract

According to the radiological protection principles, practices involving ionizing radiation must be planned and carried out under the guarantee that the values of individual doses, the number of people exposed to radiation and the probability of accidental exposures are as low as reasonably achievable. Therefore, radiation dosimetry is required to be done with reliable instruments designed for measuring dosimetric quantities. The reliability of the dosimetry depends on both the calibration of the dosimeter and its proper performance under certain test conditions. The International Standardization Organization (ISO), in order to promote international standardization and metrological coherency, established sets of reference X-ray beams for dosimeter calibration and typing-test; they are expected to be implemented in metrology laboratories in compliance with specific technical requirements. At low energies there are specific requirements that need to be considered in both the implementation of the reference beams and their use in calibration and testing. The present study is an analysis of the procedures and criteria for ISO 4037 reference radiation implementation, at low energies. In the Dosimeter Calibration Laboratory of the Development Center of Nuclear Technology (LCD / CDTN), experiments were performed for determining the X-ray reference radiation parameters. Alternatives to the usual methods for half-value  More>>
Publication Date:
Jul 01, 2012
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-12576
Resource Relation:
Other Information: Diss. (M.Sc.)
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; CALIBRATION STANDARDS; CLIMATES; COMPUTERIZED SIMULATION; DOSEMETERS; ISO; X RADIATION; X-RAY DOSIMETRY; X-RAY SPECTRA; X-RAY SPECTROSCOPY
OSTI ID:
22116453
Research Organizations:
Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN), Belo Horizonte, MG (Brazil). Programa de Pos-Graduacao em Ciencia e Tecnologia das Radiacoes, Minerais e Materiais
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR1300109073110
Availability:
Available from INIS in electronic form
Submitting Site:
BRN
Size:
123 page(s)
Announcement Date:
Jul 29, 2013

Citation Formats

Figueiredo, Marcus Tadeu Tanuri de. Analysis of the procedures and criteria for implantation of X-ray beams for ISO 4037 reference at low energies; Analise dos procedimentos e criterios de implantacao de feixes de raios X de referencia ISO 4037 em baixas energias. Brazil: N. p., 2012. Web.
Figueiredo, Marcus Tadeu Tanuri de. Analysis of the procedures and criteria for implantation of X-ray beams for ISO 4037 reference at low energies; Analise dos procedimentos e criterios de implantacao de feixes de raios X de referencia ISO 4037 em baixas energias. Brazil.
Figueiredo, Marcus Tadeu Tanuri de. 2012. "Analysis of the procedures and criteria for implantation of X-ray beams for ISO 4037 reference at low energies; Analise dos procedimentos e criterios de implantacao de feixes de raios X de referencia ISO 4037 em baixas energias." Brazil.
@misc{etde_22116453,
title = {Analysis of the procedures and criteria for implantation of X-ray beams for ISO 4037 reference at low energies; Analise dos procedimentos e criterios de implantacao de feixes de raios X de referencia ISO 4037 em baixas energias}
author = {Figueiredo, Marcus Tadeu Tanuri de}
abstractNote = {According to the radiological protection principles, practices involving ionizing radiation must be planned and carried out under the guarantee that the values of individual doses, the number of people exposed to radiation and the probability of accidental exposures are as low as reasonably achievable. Therefore, radiation dosimetry is required to be done with reliable instruments designed for measuring dosimetric quantities. The reliability of the dosimetry depends on both the calibration of the dosimeter and its proper performance under certain test conditions. The International Standardization Organization (ISO), in order to promote international standardization and metrological coherency, established sets of reference X-ray beams for dosimeter calibration and typing-test; they are expected to be implemented in metrology laboratories in compliance with specific technical requirements. At low energies there are specific requirements that need to be considered in both the implementation of the reference beams and their use in calibration and testing. The present study is an analysis of the procedures and criteria for ISO 4037 reference radiation implementation, at low energies. In the Dosimeter Calibration Laboratory of the Development Center of Nuclear Technology (LCD / CDTN), experiments were performed for determining the X-ray reference radiation parameters. Alternatives to the usual methods for half-value layer determination were studied. Spectra of reference beams were simulated with software and compared with experimental measurements. Different climatic conditions were reproduced in the Laboratory for analysis of its influence on the determination of the beam parameters. Uncertainties in the measurements of studied parameters were evaluated. According to the ISO 4037 criteria, the low energy X-ray beams were considered to be implemented; they allowed the determination of the conversion coefficients from air kerma to the operational radiation protection quantities. (author)}
place = {Brazil}
year = {2012}
month = {Jul}
}