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Calibration of stack monitors for measurement of noble gases in nuclear facilities
Petr Kovar1, Pavel Dryak, Jiri Suran
1Czech Metrology Institute, Inspectorate for Ionizing Radiation, Radiova 1, CZ-102 00 Prague 10, Czech Republic. pkovar@cmi.cz
Abstract:
In nuclear facilities stack monitors are used for the measurement of the volumetric activity of noble gases. Spectrometric measurement is needed because the content of stack effluents is always a mixture of radionuclides. In some nuclear power plants new types of monitors were installed based on HPGe detectors. For efficiency calibration a standard with the radionuclide Xe-127 was developed and calibration curve constructed in the energy range 81 keV-1293 keV. Experiental efficiencies were checked using an MC model.
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