Unit:
Κατεύθυνση Πυρηνική Φυσική και Φυσική Στοιχειωδών ΣωματιδίωνLibrary of the School of Science
Author:
Themelis Christos
Supervisors info:
Θεόδωρος Μερτζιμέκης, Αναπληρωτής Καθηγητής, Τμήμα Φυσικής, Πανεπιστήμιο Αθηνών
Original Title:
Χαρακτηρισμός ραδιενεργών υλικών με την τεχνική της in-situ φασματοσκοπίας-γ
Translated title:
Characterization of radioactive materials by the technique of in-situ spectroscopy-γ
Summary:
The problem of characterizing historical radioactive residues in a nuclear facility is a critical issue related to the dismantling plan of the facility, the final management of these materials, as well as the radiation protection of workers, the population and the environment. Radioactive objects, as well as containers containing various radioactive materials, must be classified in terms of the concentration of radionuclides prior to their final disposal as radioactive residues.
Destructive methods of characterization of materials, although they are the most accurate, have a high cost and a considerable degree of difficulty including radiation protection of personnel as they require representative sampling of objects. In contrast, the method of in-situ spectroscopy-γ has proven to be a reliable and effective method for the non-destructive radiological characterization of these objects.
However, the non-homogeneous composition and different geometric shapes of radioactive materials and objects make their quantitative characterization a particularly difficult task.
This paper presents experimental studies in-situ spectroscopy-γ in conjunction with Monte-Carlo simulations for the development of a methodology aimed at characterizing radioactive materials. The methodology developed was used in the characterization and categorization of a set of activated or contaminated objects located in the temporary storage of radioactive materials in the facilities of the laboratory of the research nuclear reactor of NCSR Demokritos.
Main subject category:
Science
Keywords:
Characterization, Radioactive Materials, Spectroscopy-γ
