ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-09072016-214002


Tipo di tesi
Tesi di laurea magistrale
Autore
DI BUONO, ANTONIO
URN
etd-09072016-214002
Titolo
Development of a prototype drone for nuclear decommissioning and radiation surveys.
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA NUCLEARE
Relatori
relatore Prof. d'Errico, Francesco
relatore Dott. Ciolini, Riccardo
relatore Dott.ssa Lo Frano, Rosa
relatore Dott.ssa Wheldon, Tzany Kokalova
Parole chiave
  • scintillator detector
  • radiation detection
  • nuclear decommissiong
  • GPS
  • drone
Data inizio appello
03/10/2016
Consultabilità
Non consultabile
Data di rilascio
03/10/2086
Riassunto
Nowadays one of the most complicated challenges for Nuclear Industry is to ensure a safe and efficient decommissioning of nuclear facilities. With the term decommissioning we usually describe the process, at the end of life of facility, starting after the defueling and coolant removal.
One of the most relevant activities related to the decommissioning of nuclear facilities is the radiological characterisation. With the term “radiological characterisation” we define all operation to determinate the type, location and concentration of radionuclides.
Radiological characterisation, together with clearance levels, allows minimizing the radiological hazards the waste volume and costs of decommissioning.
In these last years many efforts have been carried out to improve the use of Unmanned Aircraft Systems (UAS) in particular in the decommissioning field. Sometimes we have to face the characterization of unknown and hazardous environments because of the lack of recorded data, in case of experimental facilities where took place different experiments at the beginning of nuclear industry or simply we have to decommissioning facility that was not designed with the aim of future decommissioning (presence of activated material,place difficult to reach or waste disposed without characterization or engineering barriers).
The aim of this work is to demonstrate the feasibility to develop an airborne system for radiation survey. The starting point of the research was the characterization of the detector of choice. During the testing we calculated the energy calibration of the MultiChannel Analyser, energy resolution, the detection efficiency of the detector and the minimum
detectable quantity in the laboratory. We can confirm that SIGMA50 detector is suitable for this system and we were able to measure a 137Cs source in the distance range of interest.
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