Uncertainty analysis of in-situ gamma spectrometry measurements of air cleaning filter cartridges and 200L drums by a HPGe detector

In the present study a comparative evaluation of two methods for 137Cs determination (pretreatment for gamma spectrometry) is attempted. One of them is the conventional AMP (ammonium molybdophosphate, (ΝΗ4)3Ρ(Μo3O10)4) method (radiochemical treatment based on coprecipitation) and the other one is a method based on pre-concentration of cesium in situ by using the Mark III Centrifugal Pump. The pump, which is described analytically in the study, is composed of a motor (pump), four cartridge housings (containing the scavengers), a flow meter and a pressure tube (containing the battery pack and the timer board). For justification, this method is compared with the AMP co-precipitation one. Following up the radioanalytical procedures, the gamma spectrometry system (relative efficiency of high purity germanium detector 90%) is also demonstrated, as conformed to mea suring obtained parameters. Finally, the advantages and disadvantages of these two methods are recorded and the application of each one is suggested.

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Study on analyzing overlaped peaks using the Gold algorithm of unfolding

Science and Technology Development Journal ◽

10.32508/stdj.v19i2.791 ◽

2016 ◽

Vol 19 (2) ◽

pp. 71-79

Author(s):

Loan Thi Hong Truong ◽

Hoa Phuc Long Cao ◽

Phuong Dang Nguyen ◽

My Thi Thao Dang ◽

Huy Quang Ngo

Keyword(s):

Gamma Spectrometry ◽

Environmental Samples ◽

Hpge Detector ◽

Gamma Spectrum ◽

Low Level ◽

Continuum Region ◽

Gamma Spectra

In this work, we initially applied the Gold unfolding algorithm to deconvolute continuum region in the gamma spectra and to analyze its overlaped peaks for the gamma spectrometry using HPGe detector. The results could be used to analyse overlaped peaks of low level gamma spectrum for environmental samples.

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Accuracy associated with the activity determination by in situ gamma spectrometry of naturally occurring radionuclides in soils

Journal of Environmental Radioactivity ◽

10.1016/j.jenvrad.2016.05.024 ◽

2016 ◽

Vol 162-163 ◽

pp. 219-224 ◽

Cited By ~ 3

Author(s):

A. Baeza ◽

J.A. Corbacho ◽

J. Guillén

Keyword(s):

Gamma Spectrometry ◽

Activity Determination ◽

Naturally Occurring ◽

Naturally Occurring Radionuclides

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In situ gamma spectrometry using portable HPGe detector. Radiological characterization and environmental surveillance around an operating nuclear power plant. Possibilities and limits

Journal of Radiological Protection ◽

10.1088/1361-6498/ac4116 ◽

2021 ◽

Author(s):

Jose Angel Corbacho ◽

A Baeza

Keyword(s):

Power Plant ◽

Nuclear Power Plant ◽

Gamma Spectrometry ◽

Nuclear Power ◽

Power Plants ◽

Activity Concentration ◽

Versatile Tool ◽

Ge Detector ◽

Radiological Characterization

Abstract In situ technique for measuring radionuclides in the soil using a portable Ge detector is a highly versatile tool for both the radiological characterization and for the monitoring of operating nuclear power plants. The main disadvantage of this technique is related to the lack of knowledge of the geometry of the source whose activity concentration is to be determined. However, its greatest advantage is the high spatial representability of the samples and the lower time and resource consumption than gamma spectrometry lab measurements. In this study, the possibilities and limits offered by in situ gamma spectrometry with a high resolution gamma portable detector in two common uses are shown: First, the radiological background characterization and its relationship with the geology of an area of 2700 km2 are assessed; Secondly, its potential for monitoring man-made activity concentration in soils located around an operating nuclear power plant in Spain for surveillance purposes is evaluated. Finally, high accuracy radiation maps have been prepared from the measurements carried out. These radiation maps are essential tools to know the radioactive background of an area, especially useful to assess artificial radioactive deposits produced after a nuclear accident or incident.

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In-Situ Measurement of Artificial Nuclides in Seabed Sediments Based on Monte Carlo Simulations and an Underwater HPGe Detector

Marine Technology Society Journal ◽

10.4031/mtsj.53.3.1 ◽

2019 ◽

Vol 53 (3) ◽

pp. 16-22

Author(s):

Jinzhao Zhang ◽

Hongzhi Li ◽

Xianguo Tuo

Keyword(s):

Monte Carlo ◽

Monte Carlo Simulations ◽

Energy Resolution ◽

Hpge Detector ◽

High Energy ◽

In Situ Measurement ◽

Energy Calibration ◽

High Energy Resolution ◽

Seabed Sediments

AbstractIn-situ measurement of marine sediment radioactivity does not destroy the stratification of radionuclides in the sediment. We develop a novel seabed sediment radioactive measurement technique using a High Purity Germanium (HPGe) detector. The overall measurement system is designed, and the detector energy calibration is performed. The efficiency is calculated based on Monte Carlo simulations using the MCNP5 code. We compared the efficiency and energy resolution with the NaI(Tl) detection through experiments. NaI(Tl) detection is incapable of identifying the 137Cs artificial nuclides in seabed sediments due to the energy resolution limit. Hence, underwater HPGe detection is utilized due to its high energy resolution, which enables the detection of artificial nuclides 137Cs. The proposed method is of great significance in evaluating marine radioactive pollution.

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