Commissioning of the Radiation Monitor Calibration Laboratory (LabCal) of IDQBRN for cesium-137 irradiation system
DOI:
https://doi.org/10.15392/bjrs.v9i3.1702Palabras clave:
Commissioning, Calibration, DQBRN, Cs-137.Resumen
The provision for the Brazilian Army of equipment that provides reliable and safe measurements, enabling decision-making based on radioprotection parameters, leads to the need to investigate the metrology of the calibration system used in the Radiation Monitor Calibration Laboratory (LabCal) of the Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN). To this end, the commissioning in cesium-137 is of primary importance in this process. In order to check the conformity of the radiator system, in this work, the ambient dose equivalent rate, , was obtained experimentally for several configurations to compare them with the appropriate theoretical concepts. For this, the distance between the source of Cesium-137 (36.9 GBq in 01/22/2015) and the ionization chamber was varied from 500 to 3000 mm at 250mm intervals. To obtain lower ambient dose equivalent rates, 15 and 32 mm thick lead attenuators were used. The mathematical model that best fit the experimental values was analyzed. In all cases, the potential function offers better fit, since the coefficients of determination obtained are approximately equal to 1, obeying the Law of the Inverse Square of the Distance, according to theoretical foundation. Moreover, it was evaluated that the relative deviations are below the limits established by the relevant standard.
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REFERÊNCIAS
COMISSÃO NACIONAL DE ENERGIA NUCLEAR. Glossário do Setor Nuclear e Radiológico Brasileiro. Rio de Janeiro, 2020.
HORSLEY, D. Process Plant Commissioning, a User Guide, Institution of Chemical Engineering, 1998.
CARVALHO, A.; Comissionamento de empreendimentos industriais. ISA. Porto Alegre - RS, 2011.
INTERNATIONAL STANDARDIZATlON ORGANIZATlON. BS ISO 4037-1 - Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 1: Radiation characteristics and production methods. Geneva, 2019.
MURRAY, l. RAYMOND. Nuclear Energy. Butterworth Heineman, 7° edição, 2014.
TAUHATA, L.; SALATI, I.P.A.; DI PRINZIO, R.; DI PRINZIO, A.R.; Radioproteção e Dosimetria: Fundamentos. 10. rev. IRD – CNEN. Rio de Janeiro - R.J.: 2014.
CERRITO, L. Radiation and Detectors: Introduction to the physics of radiation and detection devices. 1. ed. London, UK: Springer International Publishing, 2017.
TSOULFANIDIS, Nicholas et al. Measurment and Detection of Radiation. 2. ed. Washigton,
DC: Taylor e Francis, 1995.
INTERNATIONAL STANDARDIZATlON ORGANIZATION. BS ISO 4037-2 - Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy — Part 2:Dosimetry for radiation protection over the energy ranges from 8 keV to 1,3 MeV and 4
MeV to 9 MeV. Geneva 2019.
NIST. Radionuclide Half-Life Measurements Data. Disponível em:
https://www.nist.gov/pml/radionuclide-half-life-measurements/radionuclide-half-life-measurements-data. Acesso em: 06/04/2021.
INTERNATIONAL STANDARDIZATlON ORGANIZATlON. BS ISO 4037-3 - Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence. Geneva, 2019.
VF FLEXIBLE SOLUTIONS. Certificate of sealed radioactive source Nº VF 1Z14-3032- NP02en from 06/24/2015.
KNOLL, GLENN F; Radiation Detection and Measurement. 3rd ed.. New York, NY.
BAPTISTA, Alfredo. Equipamentos detectores de radiação e sua utilização. Curso de proteção e segurança radiológica em Radiografia Industrial, Lisboa, p. 1-44, 23 ago. 2020.
LNMRI. Certificado de Calibração Nº LNMRI 0307/2020 de 26/10/2020.
VAISALA. Calibration certificates: HEL 181510096, HEL 181510097 and HEL 181510098 from 04/09/2018.
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Derechos de autor 2021 Brazilian Journal of Radiation Sciences (BJRS)
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