Methods for Determining the Activity Concentration Calibration Factor for Ventilation Duct in Cyclotron Sites

Dimitry Ginzburg, A Osovizky, J Paran, V Pushkarsky, B Ashkenazi, L Shohat, K Ben-Meir, Itzhak Orion, B Sarusi, D Tirosh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Cyclotrons are commonly used for production of radioactive isotopes for nuclear medicine purposes The nuclear process requires installation of a ventilation stack According to the regulations in many countries, the released activity should be monitored and controlled in order to limit air pollution This requires a stuck radiation detector and determining a converting factor that will translate the radiation detector reading into activity concentration units Calibrating the conversion factor is done mainly by releasing a known amount of activity Having a preliminary estimation of the conversion factor, during the site construction stage, is an important option for the duct configuration design, in order to achieve the required detection sensitivity An algorithm for estimating the stack concentration calibration factor in positron emitting isotopes producing sites was developed The algorithm which is described in this article is based on three independent methods that consist of MCNP simulations analytical calculations and experimental setup with controlled static calibration releases of gaseous "1"8F"<":",") which was produced especially for this purpose by the cyclotron site in Soreq Nuclear Research Center Israel The specified methods applied on few stack sections with different shapes and sizes
Original languageEnglish
Title of host publication24th Conference of the Nuclear Societies in Israel
StatePublished - 1 Jan 2008


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