Large-scale individual monitoring of internal contamination by gamma-emitting radionuclides in nuclear accident scenarios
| Autor: | Giuseppe Antonacci, A. Rizzo, L. Ciciani, Paolo Battisti, C. M. Castellani, Ignazio Vilardi, D. Del Gaudio, Isabella Giardina, Luciano Sperandio, G. Iurlaro |
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| Přispěvatelé: | Vilardi, I., Antonacci, G., Battisti, P., Castellani, C. -M., Ciciani, L., Del Gaudio, D., Giardina, I., Iurlaro, G., Rizzo, A., Sperandio, L. |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Thyroid Gland
in vivo internal contamination monitoring nuclear accident Manikins Whole-Body Counting Effective dose (radiation) Imaging phantom 030218 nuclear medicine & medical imaging Ionizing radiation Iodine Radioisotopes 03 medical and health sciences 0302 clinical medicine Radiation Monitoring dose assessment Humans Waste Management and Disposal gamma spectrometry Fission products Radionuclide business.industry Public Health Environmental and Occupational Health Radioactive waste General Medicine Radiation Exposure Semiconductor detector Cesium Radioisotopes Mockup 030220 oncology & carcinogenesis mobile whole-body counter Environmental science Terrorism Radioactive Hazard Release Nuclear medicine business |
| Popis: | The results obtained in a measurement campaign concerning internal contamination by the gamma-emitting radionuclides of a large number of individuals are presented in this work. The aim is to assess the effectiveness of the spectrometric method in an emergency response following a nuclear power plant accident or a spread of radionuclides in the atmosphere due to an act of terrorism. An HPGe portable spectrometer, deployed in a collective protection apparatus, was used for both whole-body and thyroid measurements. An adult bottle mannequin absorption (BOMAB) and thyroid phantoms were used to evaluate the detector performance. The BOMAB phantom was provided by the Italian Institute of Ionizing Radiation Metrology (INMRI) for the ENEA intercomparison exercise. Thyroid phantoms were provided by the Belgian Nuclear Research Centre for the 'Child and Adult Thyroid Monitoring After Reactor Accident' European intercomparison exercise. The instrument performance was further evaluated by collecting spectral data from healthy volunteers, using acquisition times of 180 s and 100 s, respectively, for the whole-body and thyroid measurements. The detector showed good accuracy in quantifying radionuclide activities in the adult BOMAB and in the thyroids of persons of all ages. The proposed method allows us to detect in vivo activity leading to a committed effective dose E(50) and committed thyroid equivalent doses H T greater than 2 mSv due to all gamma-emitting fission products, if the scan is performed within five days after intake. Assuming, for instance, an acute inhalation of 137Cs and 131I, the obtained detection limit values for adults lead to a E(50) value equal to 0.08 mSv and an H T value of 0.27 mSv. The E(50) and H T values show that the proposed method can be successfully used when the dose assessment must be rapidly performed for a large number of individuals in the eventuality of the scenarios previously mentioned. |
| Databáze: | OpenAIRE |
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