Cristian Dragolici - Academia.edu (original) (raw)
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Papers by Cristian Dragolici
When facing a Chemical, Biological, Radiological, and Nuclear (CBRN) incident, decontamination is... more When facing a Chemical, Biological, Radiological, and Nuclear (CBRN) incident, decontamination is a key element in safeguarding individuals and property. First responders are using decontamination technique to minimize exposure to hazardous substances and limit the spread of contamination. The disposables decontamination means and methods are very divers, and an evaluation of the most appropriate aspects often encountered in the real cases could determine the adequate methods to be used. However, there is not only one universal method applicable in all situations, but a smart combination of known decontamination methods can be used to obtain very best results. The main goal in using the decontamination methods is to try to restore the initial state of the affected surface whether on the objects or living beings. In this respect, the present paper is focused to present a short introduction in the means and methods used to minimalize the CBRN effects.
Before any decommissioning activities begin, the clean-up of reactor main areas it's an important... more Before any decommissioning activities begin, the clean-up of reactor main areas it's an important item in the work of facility preparations for radiological characterization During the clean-up process and important amount of radioactive and non-radioactive materials was aquired being appropriate for treatment and further storage or excemt from regulatory control and then reused or recycled. The present paper describes the results obtained in the waste management of the cleanup process prior of beginning of any decommissioning activities.
Neutron scattering is a powerful and direct method for investigating the static and dynamic prope... more Neutron scattering is a powerful and direct method for investigating the static and dynamic properties of materials manifesting disordered structure. Ordinary Portland cement hydrated with light and heavy water and mixed with specific precipitates used for conditioning of the radioactive waste, was used to be studied by INS. The obtained data allows us to draw conclusions regarding the behavior of H 2 O and D 2 O molecules in the structure of the investigated material and the influence of the additives to the general dynamics of the sample. In the following, we discuss the spectra obtained from the data accumulated during the experiments performed at the DIN-2PI spectrometer from JINR Dubna, Russian Federation. We'll show that some of the additives used in large or small quantities influence in a way or another the dynamic structure of the cement paste.
Nuclear Technology and Radiation Protection, 2014
The clean-up and decontamination of the hot cells will be performed in the second phase of the WW... more The clean-up and decontamination of the hot cells will be performed in the second phase of the WWR-S research reactor decommissioning. Identification of possible incidents or accidents is the key element in radiological assessment and prevention. As major incident it was considered a fire burst that occurred during the progress of the clean-up operations. The postulated incident has, as a consequence, thick smoke generation from the burned radioactive material and the dispersion of this material in the environment through the technological ventilation system and the evacuation chimney. From the performed analysis it can be seen that in the case of an incident to the reactor hot cells, an operator engaged in intervention operations could take an effective dose of 5.29 Sv per event, coming from both external and internal exposure. Such an incident, if it happens, would be classified of level 3 on the INES scale.
When facing a Chemical, Biological, Radiological, and Nuclear (CBRN) incident, decontamination is... more When facing a Chemical, Biological, Radiological, and Nuclear (CBRN) incident, decontamination is a key element in safeguarding individuals and property. First responders are using decontamination technique to minimize exposure to hazardous substances and limit the spread of contamination. The disposables decontamination means and methods are very divers, and an evaluation of the most appropriate aspects often encountered in the real cases could determine the adequate methods to be used. However, there is not only one universal method applicable in all situations, but a smart combination of known decontamination methods can be used to obtain very best results. The main goal in using the decontamination methods is to try to restore the initial state of the affected surface whether on the objects or living beings. In this respect, the present paper is focused to present a short introduction in the means and methods used to minimalize the CBRN effects.
Before any decommissioning activities begin, the clean-up of reactor main areas it's an important... more Before any decommissioning activities begin, the clean-up of reactor main areas it's an important item in the work of facility preparations for radiological characterization During the clean-up process and important amount of radioactive and non-radioactive materials was aquired being appropriate for treatment and further storage or excemt from regulatory control and then reused or recycled. The present paper describes the results obtained in the waste management of the cleanup process prior of beginning of any decommissioning activities.
Neutron scattering is a powerful and direct method for investigating the static and dynamic prope... more Neutron scattering is a powerful and direct method for investigating the static and dynamic properties of materials manifesting disordered structure. Ordinary Portland cement hydrated with light and heavy water and mixed with specific precipitates used for conditioning of the radioactive waste, was used to be studied by INS. The obtained data allows us to draw conclusions regarding the behavior of H 2 O and D 2 O molecules in the structure of the investigated material and the influence of the additives to the general dynamics of the sample. In the following, we discuss the spectra obtained from the data accumulated during the experiments performed at the DIN-2PI spectrometer from JINR Dubna, Russian Federation. We'll show that some of the additives used in large or small quantities influence in a way or another the dynamic structure of the cement paste.
Nuclear Technology and Radiation Protection, 2014
The clean-up and decontamination of the hot cells will be performed in the second phase of the WW... more The clean-up and decontamination of the hot cells will be performed in the second phase of the WWR-S research reactor decommissioning. Identification of possible incidents or accidents is the key element in radiological assessment and prevention. As major incident it was considered a fire burst that occurred during the progress of the clean-up operations. The postulated incident has, as a consequence, thick smoke generation from the burned radioactive material and the dispersion of this material in the environment through the technological ventilation system and the evacuation chimney. From the performed analysis it can be seen that in the case of an incident to the reactor hot cells, an operator engaged in intervention operations could take an effective dose of 5.29 Sv per event, coming from both external and internal exposure. Such an incident, if it happens, would be classified of level 3 on the INES scale.