An autonomous in situ detection system for radioactivity measurements in the marine environment

Tsabaris, C.; Bagatelas, C.; Dakladas, Th-H.; Papadopoulos, C.; Vlastou, R.; Chronis, G.

doi:10.1016/j.apradiso.2008.02.064

Cited by 84 publications

(23 citation statements)

References 17 publications

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“…Where α, b, c and d are fitted parameters and E is the energy of the specific γ-ray. Experimental values [9] of the NaI(Tl) detector marine efficiency, ε m , (extracted for the 140.5, 661.6 and 1460.6 keV transitions of 99m Tc, 137 Cs and 40 K, respectively) were deduced and seem to be in good agreement with the simulated ones. The experimental and simulated marine efficiency values seem to agree within the 10% uncertainty values.…”

Section: Marine Efficiencysupporting

confidence: 65%

“…It is an autonomous system with relatively low power consumption, operational on oceanographic buoys and seabed platforms. The design and special characteristics of the developed system are described elsewhere [9]. The detection system had to be tested and calibrated in the laboratory, in a water tank, before its deployment in the marine environment.…”

Section: System Descriptionmentioning

confidence: 99%

“…Such crystals are contemporarily used in many oceanographic applications, using continuous measurements for radiation monitoring with buoy operation and in situ measurements in seawater [2][3][4][5][6]. A lot of effort has been made during the last years for the experimental calibration of detection systems in water tanks, by diluting calibrated standard sources [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo simulation of a NaI detector in the aquatic environment

Bagatelas¹,

Tsabaris²,

Kokkoris³

et al. 2019

hnps

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NaI(Tl) crystals are used in many marine applications for continuous measurements with buoy operation and autonomous in situ measurements in seawater. Monte Carlo simulations were performed using the GEANT4 code for the investigation of the γ-ray absorption in water in different spherical geometries and for the efficiency of a NaI(Tl) detector of different radionuclides in the aquatic environment. In order to test the reliability of these simulations, experimental values of the NaI(Tl) detector efficiency were deduced using a special tank filled with water and reference single gamma ray sources (99mTc, 137Cs and 40K). The cascade reference source 111In was also diluted in tank for comparison with the reproduction spectra of its cascade lines as provided with the GEANT4 code. The results are in good agreement with the simulated ones within uncertainties.

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Section: Marine Efficiencysupporting

confidence: 65%

Section: System Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Monte Carlo simulation of a NaI detector in the aquatic environment

Bagatelas¹,

Tsabaris²,

Kokkoris³

et al. 2019

hnps

Self Cite

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“…Meanwhile, the NaI(Tl) scintillation detector lacks a high energy resolution but has the merit of high sensitivity. The NaI(Tl) scintillation detector is considered suitable for the high speed monitoring of cesium-134 and cesium-137 together, as the absorption spectra of cesium-134 and cesium-137 overlap (Pires et al, 2003;Muminov et al, 2005;Tsabaris et al, 2008;Rahman et al, 2009;Caffrey et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Demonstration testing of a system for the high-speed monitoring of the radioactive concentration of wastewater in situ

Fukui¹,

Oota²,

Hirano³

et al. 2017

Desalination and Water Treatment

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a b s t r ac tWhile the NaI(Tl) scintillation detector lacks a high energy resolution, it has the merit of high sensitivity. The NaI(Tl) scintillation detector is considered suitable for the high-speed measurement of cesium-134 and cesium-137 together. We developed "Cesimoni-water" as a system for the in situ monitoring of the radioactive concentration of wastewater by combining an NaI(Tl) scintillation detector with a water shield technique for shielding out external natural background radiation. In this paper, we describe the Cesimoni-water system and demonstration tests carried out with the system using simulated wastewater.

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“…The system has been tested on a Remotely Operating Vehicle (ROV) (Tsabaris et al, 2008a) and integrated with fixed platforms (i.e., moorings) of the POSEIDON system. The output is configured to be transmitted via satellite to the base station (Tsabaris et al, 2008b). …”

Section: Marine Pollution (Mp)mentioning

confidence: 99%

Detecting marine hazardous substances and organisms: sensors for pollutants, toxins, and pathogens

et al. 2009

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Abstract. Marine environments are influenced by a wide diversity of anthropogenic and natural substances and organisms that may have adverse effects on human health and ecosystems. Real-time measurements of pollutants, toxins, and pathogens across a range of spatial scales are required to adequately monitor these hazards, manage the consequences, and to understand the processes governing their magnitude and distribution. Significant technological advancements have been made in recent years for the detection and analysis of such marine hazards. In particular, sensors deployed on a variety of mobile and fixed-point observing platforms provide a valuable means to assess hazards. In this review, we present state-of-the-art of sensor technology for the detection of harmful substances and organisms in the ocean. Sensors are classified by their adaptability to various platforms, addressing large, intermediate, or small areal scales. Current gaps and future demands are identified with an indication of the urgent need for new sensors to detect marine hazards at all scales in autonomous real-time mode. Progress in sensor technology is expected to depend on the development of small-scale sensor technologies with a high sensitivity and specificity towards target analytes or organisms. However, deployable systems must comply with platform requirements as these interconnect the three areal scales. Future developments will include the integration of existing methods into complex and operational sensing systems for a comprehensive strategy for long-term monitoring.Correspondence to: O. Zielinski (oliver.zielinski@imare.de)The combination of sensor techniques on all scales will remain crucial for the demand of large spatial and temporal coverage.

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An autonomous in situ detection system for radioactivity measurements in the marine environment

Cited by 84 publications

References 17 publications

Monte Carlo simulation of a NaI detector in the aquatic environment

Monte Carlo simulation of a NaI detector in the aquatic environment

Demonstration testing of a system for the high-speed monitoring of the radioactive concentration of wastewater in situ

Detecting marine hazardous substances and organisms: sensors for pollutants, toxins, and pathogens

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