TY  - CONF
AU  - Pavlović, Miroslav
AU  - Pantović Spajić, Marijana
AU  - Bartl, Pavel
AU  - Stevanović, Jasmina
AU  - Pantović, Radoje
AU  - Pantović Spajić, Katarina
AU  - Radak, Bojan
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1139
AB  - Flow meters are essential part of equipment in almost all chemical and process industries. Knowledge of
the flow dynamics and flow of material through the reactor system is required to evaluate the performance of the
reactors, processes, operation and design. Traditionally this evaluation can be performed using chemical tracers.
Chemical tracer results are not always precise and they could not allow an online diagnosis. The samples
containing chemical tracer have to go to a lab for analysis and chemical tracers are less sensitive than radioactive
ones. Radioactive tracers are the only tracers capable of measuring the active residence time distribution (RTD)
with high degree of precision and give information on-line without stopping the process. In this work the application
of radiotracer method for RTD measurement in flow meter calibration is described. The RTD measurements of the
system were performed in pilot-scale perfect mixer in series reactor for flow meter calibration with Technetium-
99 m (99mTc) as a radiotracer in the form of pertechnetate ion (99mTcO4
-). The optimization of the parameters
included input signal of radiotracer, concentration of radiotracer and position of detectors. The measured data
were analyzed, and standard and relative deviations were quantified under different operating conditions. A plug
flow model was used to simulate the measured RTD curves and investigate the flow dynamics of the flowing water.
The results of the study showed that the optimum concentration of 99mTc for flow meter calibration was 0.3 ml
having activity 0.68 mCi. The standard deviation was σ=0.10 l min-1 and the relative deviation was 0.94%. The
results of the study can help in the operation and design of the existing systems and design of new ones.
PB  - Belgrade : University of Belgrade, Faculty of Mining and Geology
C3  - 7th International Symposium Mining and Environmental Protection, International Conference, Proceedings
T1  - Technetium-99m as a Tracer for the Liquid Residence Time Distribution Measurement: Optimization of Different Radiotracer Parameters for Flow Meter Calibration
EP  - 173
SP  - 166
ER  - 

@conference{
author = "Pavlović, Miroslav and Pantović Spajić, Marijana and Bartl, Pavel and Stevanović, Jasmina and Pantović, Radoje and Pantović Spajić, Katarina and Radak, Bojan",
year = "2019",
abstract = "Flow meters are essential part of equipment in almost all chemical and process industries. Knowledge of
the flow dynamics and flow of material through the reactor system is required to evaluate the performance of the
reactors, processes, operation and design. Traditionally this evaluation can be performed using chemical tracers.
Chemical tracer results are not always precise and they could not allow an online diagnosis. The samples
containing chemical tracer have to go to a lab for analysis and chemical tracers are less sensitive than radioactive
ones. Radioactive tracers are the only tracers capable of measuring the active residence time distribution (RTD)
with high degree of precision and give information on-line without stopping the process. In this work the application
of radiotracer method for RTD measurement in flow meter calibration is described. The RTD measurements of the
system were performed in pilot-scale perfect mixer in series reactor for flow meter calibration with Technetium-
99 m (99mTc) as a radiotracer in the form of pertechnetate ion (99mTcO4
-). The optimization of the parameters
included input signal of radiotracer, concentration of radiotracer and position of detectors. The measured data
were analyzed, and standard and relative deviations were quantified under different operating conditions. A plug
flow model was used to simulate the measured RTD curves and investigate the flow dynamics of the flowing water.
The results of the study showed that the optimum concentration of 99mTc for flow meter calibration was 0.3 ml
having activity 0.68 mCi. The standard deviation was σ=0.10 l min-1 and the relative deviation was 0.94%. The
results of the study can help in the operation and design of the existing systems and design of new ones.",
publisher = "Belgrade : University of Belgrade, Faculty of Mining and Geology",
journal = "7th International Symposium Mining and Environmental Protection, International Conference, Proceedings",
title = "Technetium-99m as a Tracer for the Liquid Residence Time Distribution Measurement: Optimization of Different Radiotracer Parameters for Flow Meter Calibration",
pages = "173-166"
}

Pavlović, M., Pantović Spajić, M., Bartl, P., Stevanović, J., Pantović, R., Pantović Spajić, K.,& Radak, B.. (2019). Technetium-99m as a Tracer for the Liquid Residence Time Distribution Measurement: Optimization of Different Radiotracer Parameters for Flow Meter Calibration. in 7th International Symposium Mining and Environmental Protection, International Conference, Proceedings
Belgrade : University of Belgrade, Faculty of Mining and Geology., 166-173.

Pavlović M, Pantović Spajić M, Bartl P, Stevanović J, Pantović R, Pantović Spajić K, Radak B. Technetium-99m as a Tracer for the Liquid Residence Time Distribution Measurement: Optimization of Different Radiotracer Parameters for Flow Meter Calibration. in 7th International Symposium Mining and Environmental Protection, International Conference, Proceedings. 2019;:166-173..

Pavlović, Miroslav, Pantović Spajić, Marijana, Bartl, Pavel, Stevanović, Jasmina, Pantović, Radoje, Pantović Spajić, Katarina, Radak, Bojan, "Technetium-99m as a Tracer for the Liquid Residence Time Distribution Measurement: Optimization of Different Radiotracer Parameters for Flow Meter Calibration" in 7th International Symposium Mining and Environmental Protection, International Conference, Proceedings (2019):166-173.

TY  - CONF
AU  - Pantović, Radoje
AU  - Pantović, Marijana
AU  - Pantović, Katarina
AU  - Pavlović, Miroslav
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1118
AB  - Study of monitoring and analyzing the deformation of the collector Krivelj River. has been developed. In the period May - July 2009, the recording of the measurements and the state of the crack deformation in reinforced concrete collectors lining was performed. 
Based on analysis of the recording, four characteristic lining deformation of the shape in vulnerable parts of the collector were identified: in calotte, on the sides of calotte, sides themselves, and sides of ducts. 
Deformations in calotte zone were in form of tension cracks, reinforcement tears and separation of concrete from the reinforcement created due to high tensile stresses in the inner part of the reinforced concrete lining. The worst damage was observed due to shear stresses in the lateral parts of the calotte, while the cracks in some parts exceeded 10 cm. These are very large and dangerous damages to the collector. Given that there was a fracture of concrete, loads in those areas was taken over by the armature, which was affected by severe corrosion. Due to the large vertical pressures and the tendency for flattening of the collector in internal lateral parts of support, there was erosion of concrete in the form of plates. Small cracks appeared in the side parts of the collector ducts, too. 
For collector cross sections recording, in addition to the geodetic procedure, rotating laser beam procedure was applied. Based on these recordings it can be concluded that the profile of the collector, on his damaged sections, is ""flattened"". The laser process enables easier, faster and more credible measurements of the size and shape of the profile, which may be of particular importance when installing frameworks for future temporary and permanent rehabilitation of vulnerable sections of the collector. 
Changes in the deformation of the ten selected places in collectors were observed using embedded devices for measuring deformation cracks in collector reinforced concrete support. Final results of monitoring changes in absolute and relative deformation of reinforced concrete collector of over time show that established shifts arc part of the process of reinforced concrete roof supports deformation, which is directed towards the fracture and support breaking.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 24th Congress of Chemists and Technologists of Macedonia, International Conference
T1  - Monitoring of Krivelj river collector deformation
EP  - 161
SP  - 161
ER  - 

@conference{
author = "Pantović, Radoje and Pantović, Marijana and Pantović, Katarina and Pavlović, Miroslav",
year = "2016",
abstract = "Study of monitoring and analyzing the deformation of the collector Krivelj River. has been developed. In the period May - July 2009, the recording of the measurements and the state of the crack deformation in reinforced concrete collectors lining was performed. 
Based on analysis of the recording, four characteristic lining deformation of the shape in vulnerable parts of the collector were identified: in calotte, on the sides of calotte, sides themselves, and sides of ducts. 
Deformations in calotte zone were in form of tension cracks, reinforcement tears and separation of concrete from the reinforcement created due to high tensile stresses in the inner part of the reinforced concrete lining. The worst damage was observed due to shear stresses in the lateral parts of the calotte, while the cracks in some parts exceeded 10 cm. These are very large and dangerous damages to the collector. Given that there was a fracture of concrete, loads in those areas was taken over by the armature, which was affected by severe corrosion. Due to the large vertical pressures and the tendency for flattening of the collector in internal lateral parts of support, there was erosion of concrete in the form of plates. Small cracks appeared in the side parts of the collector ducts, too. 
For collector cross sections recording, in addition to the geodetic procedure, rotating laser beam procedure was applied. Based on these recordings it can be concluded that the profile of the collector, on his damaged sections, is ""flattened"". The laser process enables easier, faster and more credible measurements of the size and shape of the profile, which may be of particular importance when installing frameworks for future temporary and permanent rehabilitation of vulnerable sections of the collector. 
Changes in the deformation of the ten selected places in collectors were observed using embedded devices for measuring deformation cracks in collector reinforced concrete support. Final results of monitoring changes in absolute and relative deformation of reinforced concrete collector of over time show that established shifts arc part of the process of reinforced concrete roof supports deformation, which is directed towards the fracture and support breaking.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "24th Congress of Chemists and Technologists of Macedonia, International Conference",
title = "Monitoring of Krivelj river collector deformation",
pages = "161-161"
}

Pantović, R., Pantović, M., Pantović, K.,& Pavlović, M.. (2016). Monitoring of Krivelj river collector deformation. in 24th Congress of Chemists and Technologists of Macedonia, International Conference
Society of Chemists and Technologists of Macedonia., 161-161.

Pantović R, Pantović M, Pantović K, Pavlović M. Monitoring of Krivelj river collector deformation. in 24th Congress of Chemists and Technologists of Macedonia, International Conference. 2016;:161-161..

Pantović, Radoje, Pantović, Marijana, Pantović, Katarina, Pavlović, Miroslav, "Monitoring of Krivelj river collector deformation" in 24th Congress of Chemists and Technologists of Macedonia, International Conference (2016):161-161.