Minsk, Belarus
The new algorithm for portal radiation monitors with plastic detectors is discussed in the paper. It is based on optimization of the value of smoothing for count rate profiles, alarming thresholds and so called energy windows. Implementation of this algorithm provides increasing of probability of detection of the radioactive sources including those which are masked by NORM under suppression of natural background. The verification of radioactive sources and NORM on the base of analysis of count rate profiles for point and distributed sources is discussed in the first part.
portal radiation monitor, smoothing, profile of count rate, NORM, point and distributed radioactive source
1. Final Report. ITRAP - Illicit Trafficking Radiation Detection Assessment Program. Austrian Research Centers, Seibesrdorf, 2002.
2. Combating Illicit Trafficking in Nuclear and other Radioactive Materials. IAEA Nuclear Security Series No 6. Vienna, IAEA, 2007.
3. Strengthening control over radioactive sources in authorized use and regaining control over orphan sources. IAEA-TECDOC-1388. Vienna, IAEA, 2004.
4. Code «SONET». Chigrinov S., Kievitskaya A., Rakhno I. Proc. of the 3rd Int. Conf. on Accelerator Driven Transmutation Technologies and Applications, June 7-11, 1999, Prague, Czech Republic. R. 12.