Segmented gamma scanning of conditioned radioactive wastes: Development, experimental validation, and application of an angular scanning procedure for hot-spot characterization

Alessandro Dodaro, Franco Vittorio Frazzoli, Romolo Remetti

Research output: Contribution to journalArticle

2 Citations (Scopus)


The "angular scanning" method allows both localization of hot spot(s) and the evaluation of the corresponding activity. Taking into account the experimental setup parameters (e.g., drum geometry, drum-detector distance, collimator geometry, etc.), the peak count rate versus the angular displacement is modeled as a theoretical analytical function of three independent variables (unknowns) for each hot spot: the two coordinates of the hot-spot center of mass and the corresponding activity value. Solutions for unknowns are obtained from equating, for each angular displacement, the experimental count rate to the corresponding theoretical one. Such a procedure has been applied to the SRWGA gamma scanner of the Casaccia Research Center utilizing a set of Waste Packages Reference Standards (with different matrices) where the gamma sources in different radial-azimuthal positions can be located.
Original languageEnglish
Pages (from-to)130 - 140
Number of pages11
JournalNuclear Technology
Issue number1
Publication statusPublished - 2003
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this