Calibration of monitors used for surveillance of radioactivity in effluent water from CERN's accelerator installations

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
P Vojtyla

Abstract

Water released into the environment from CERN's accelerator installations may contain both long-lived (7Be, 22Na) and short-lived (11C, 13N, 24Na) gamma radioactivity. Each potential release point is equipped with an on-line monitor for short-lived radionuclides, which consists of a scintillation probe immersed in a tank filled with monitored water. Whilst calibration standards are available for long-lived radioactivity, computer simulations are the only feasible way to determine the monitor efficiency for the short-lived radionuclides. The paper describes computer simulations using the Monte Carlo code GEANT 3.21. An excellent agreement between measured and computed efficiencies was obtained for the long-lived radionuclides, validating the computer model. A calibration method is proposed for light positron emitters, which combines an experimental calibration for 7Be and correction factors obtained in the simulations.

Citations

Jul 6, 2013·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·R CasanovasM Salvadó
Mar 11, 2011·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·M AhmadiM Rabbani
Oct 10, 2013·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·G EleftheriouR Vlastou
May 24, 2016·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Hamed AbdollahnejadMohammad Reza Zare
Sep 10, 2005·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·R VlastouC Tsabaris

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