Uncertainty for Radon EEC Calibration System with Alpha Self-Absorption Consideration

Journal of Nuclear Engineering and Radiation Science ◽

10.1115/1.4048633 ◽

2020 ◽

Author(s):

Mostafa Yuness Mostafa ◽

Maxim Vasyanovich ◽

Michael Zhukovsky

Keyword(s):

Gamma Spectroscopy ◽

Equilibrium Concentration ◽

Standard Uncertainty ◽

Alpha Particles ◽

Calibration System ◽

Reference Measuring ◽

Total Uncertainty ◽

Measuring Device ◽

Decay Products ◽

Radon Decay

Abstract The measurement of radon decay products level in dwellings or working places separately is not preferable. The estimation of radon equivalent equilibrium concentration (EECRn) is more simple and quick technique. In this work, the uncertainty of calibration system for radon EEC measurements will present and the reduction will be suggesting. The calibration system for radon EEC measurements was presented and described in previous work with gamma spectrometer as a reference measuring device. The influence of alpha particles absorption in filters materials and filter efficiency taken into account. The measurements of EECRn by gamma spectrometry and improved alpha radiometry are in good agreement and the systematic shift between average values is observed and resolved. The total standard uncertainty of EECRn measurements with gamma spectroscopy is 3.8 %. 71 % of this total uncertainty value is related to the uncertainty of the count rate at full absorption peak with gamma spectroscopy. If the time between the end of sampling and gamma spectroscopy measurements reduced to 2000 s not 4000 s, this value will reduce to 1.6 % and the total standard uncertainty of EEC will be 2.6 %.

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Radon measurements along active faults in the Langadas Basin, northern Greece

Natural Hazards and Earth System Science ◽

10.5194/nhess-1-159-2001 ◽

2001 ◽

Vol 1 (3) ◽

pp. 159-164 ◽

Cited By ~ 7

Author(s):

C. Papastefanou ◽

M. Manolopoulou ◽

S. Stoulos ◽

A. Ioannidou ◽

E. Gerasopoulos

Keyword(s):

Active Faults ◽

Barometric Pressure ◽

Alpha Particles ◽

Northern Greece ◽

Decay Products ◽

Before And After ◽

Radon Decay ◽

Radon Measurements ◽

Alpha Spectrometer ◽

Radon Monitoring

Abstract. A network of three radon stations has been established in the Langadas Basin, northern Greece for radon monitoring by various techniques in earthquake prediction studies. Specially made devices with plastic tubes including Alpha Tracketch Detectors (ATD) were installed for registering alpha particles from radon and radon decay products exhaled from the ground, every 2 weeks, by using LR-115, type II, non-strippable Kodak films, starting from December 1996. Simultaneous measurements started using Lucas cells alpha spectrometer for instantaneous radon measurements in soil gas, before and after setting ATDs at the radon stations. Continuous monitoring of radon gas exhaling from the ground started from the middle of August 1999 by using silicon diode detectors, which simultaneously register meteorological parameters, such as rainfall, temperature and barometric pressure. The obtained data were studied together with the data of seismic events, such as the magnitude, ML, of earthquakes that occurred at the Langadas Basin during the period of measurements, as registered by the Laboratory of Geophysics, Aristotle University of Thessaloniki, in order to find out any association between them.

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