TY  - JOUR
AU  - Čomor, Jožef J.
AU  - Stevanović, Žarko M.
AU  - Rajcevic, M
AU  - Košutić, Duško D.
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6415
AB  - Three radionuclides of iodine (I-121, I-123 and I-124) are of great interest for modern nuclear medical diagnostics. They can be all produced by the (p,n) nuclear reaction using isotopically enriched solid TeO2, targets. The produced radioiodine can be rapidly separated from the target material by dry-distillation from the melted target after the irradiation. Since TeO2 has low thermal conductivity, the most critical issue in the design of a production target is the provision of its effective cooling in order to avoid melting of the oxide layer during the irradiation. A compact solid target irradiation system (COSTIS) has been designed for the irradiation of TeO2 targets, suitable for routine production of radioiodine. The target is a circular Pt-disk that carries the TeO2 melted into a circular grove in the center of the disk. The target coin is manually inserted into COSTIS, fixed pneumatically in the irradiation position, released remotely after irradiation and falls down driven by gravity into a transport container. The engineering design of the cavity for helium cooling of the front face of TeO2 and the impinging water jet cooling the back face of the target disk was done based on a simulation of the thermal behavior of the target during the irradiation. A straightforward numerical method for the prediction of the thermal properties of the solid target has been developed. The approach is based on calculations without using the common practice of Prandtl and Nusselt empirical correlation. The fluid flow description in the boundary layer was refined in such a way, that the heat flux, exchanged between the solid and fluid, is obtained directly from Fourier law. The governing equations are based on the local thermodynamic equilibrium and conservation equation of mass, momentum and energy. In order to solve the set of governing equations, the finite-volume method is used. This procedure gives rapid answers whether the proposed geometry satisfies the design criteria. (C) 2003 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Modeling of thermal properties of a TeO2 target for radioiodine production
VL  - 521
IS  - 1
SP  - 161
EP  - 170
DO  - 10.1016/j.nima.2003.11.147
ER  - 

@article{
author = "Čomor, Jožef J. and Stevanović, Žarko M. and Rajcevic, M and Košutić, Duško D.",
year = "2004",
abstract = "Three radionuclides of iodine (I-121, I-123 and I-124) are of great interest for modern nuclear medical diagnostics. They can be all produced by the (p,n) nuclear reaction using isotopically enriched solid TeO2, targets. The produced radioiodine can be rapidly separated from the target material by dry-distillation from the melted target after the irradiation. Since TeO2 has low thermal conductivity, the most critical issue in the design of a production target is the provision of its effective cooling in order to avoid melting of the oxide layer during the irradiation. A compact solid target irradiation system (COSTIS) has been designed for the irradiation of TeO2 targets, suitable for routine production of radioiodine. The target is a circular Pt-disk that carries the TeO2 melted into a circular grove in the center of the disk. The target coin is manually inserted into COSTIS, fixed pneumatically in the irradiation position, released remotely after irradiation and falls down driven by gravity into a transport container. The engineering design of the cavity for helium cooling of the front face of TeO2 and the impinging water jet cooling the back face of the target disk was done based on a simulation of the thermal behavior of the target during the irradiation. A straightforward numerical method for the prediction of the thermal properties of the solid target has been developed. The approach is based on calculations without using the common practice of Prandtl and Nusselt empirical correlation. The fluid flow description in the boundary layer was refined in such a way, that the heat flux, exchanged between the solid and fluid, is obtained directly from Fourier law. The governing equations are based on the local thermodynamic equilibrium and conservation equation of mass, momentum and energy. In order to solve the set of governing equations, the finite-volume method is used. This procedure gives rapid answers whether the proposed geometry satisfies the design criteria. (C) 2003 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Modeling of thermal properties of a TeO2 target for radioiodine production",
volume = "521",
number = "1",
pages = "161-170",
doi = "10.1016/j.nima.2003.11.147"
}

Čomor, J. J., Stevanović, Ž. M., Rajcevic, M.,& Košutić, D. D.. (2004). Modeling of thermal properties of a TeO2 target for radioiodine production. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 521(1), 161-170.
https://doi.org/10.1016/j.nima.2003.11.147

Čomor JJ, Stevanović ŽM, Rajcevic M, Košutić DD. Modeling of thermal properties of a TeO2 target for radioiodine production. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2004;521(1):161-170.
doi:10.1016/j.nima.2003.11.147 .

Čomor, Jožef J., Stevanović, Žarko M., Rajcevic, M, Košutić, Duško D., "Modeling of thermal properties of a TeO2 target for radioiodine production" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 521, no. 1 (2004):161-170,
https://doi.org/10.1016/j.nima.2003.11.147 . .

TY  - JOUR
AU  - Čomor, Jožef J.
AU  - Dakovic, M
AU  - Rajcevic, M
AU  - Košutić, Duško D.
AU  - Spasic, M
AU  - Vidovic, A
AU  - Duricic, J
AU  - Nedeljković, N.
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6328
AB  - According to the concept of the TESLA Accelerator Installation, the channel for production of radioisotopes has to routinely produce Tl-201, In-111, Ga-67, I-123 and F-18, and a number of other radionuclides for experimental purposes. The production of I-123 and F-18 will be performed in dedicated, commercial target stations, while a versatile solid target irradiation system is designed for the routine and experimental production of all other radioisotopes. The solid target station is designed to accept targets for both the 7degrees and 90degrees irradiation geometry. The targets used for the routine production will be prepared by electroplating on a silver substrate. They can be irradiated with a 1.5 kW beam using the 7degrees geometry. The cooling of these targets is enhanced by fins on the back of the silver substrate designed so that the highest temperature on the surface of the target does not exceed 110degreesC. The irradiation procedures will conform to the GMP requirements for the production of radio pharmaceuticals. The irradiated targets will be transported directly into the appropriate hot cell for radiochemical processing, All cells will be equipped with a target dissolution unit for etching the irradiated, electroplated film. After decontamination and sufficient cooling down, these targets will be reused several times. (C) 2001 Elsevier Science B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Solid targetry at the TESLA Accelerator Installation
VL  - 480
IS  - 1
SP  - 7
EP  - 15
DO  - 10.1016/S0168-9002(01)02040-X
ER  - 

@article{
author = "Čomor, Jožef J. and Dakovic, M and Rajcevic, M and Košutić, Duško D. and Spasic, M and Vidovic, A and Duricic, J and Nedeljković, N.",
year = "2002",
abstract = "According to the concept of the TESLA Accelerator Installation, the channel for production of radioisotopes has to routinely produce Tl-201, In-111, Ga-67, I-123 and F-18, and a number of other radionuclides for experimental purposes. The production of I-123 and F-18 will be performed in dedicated, commercial target stations, while a versatile solid target irradiation system is designed for the routine and experimental production of all other radioisotopes. The solid target station is designed to accept targets for both the 7degrees and 90degrees irradiation geometry. The targets used for the routine production will be prepared by electroplating on a silver substrate. They can be irradiated with a 1.5 kW beam using the 7degrees geometry. The cooling of these targets is enhanced by fins on the back of the silver substrate designed so that the highest temperature on the surface of the target does not exceed 110degreesC. The irradiation procedures will conform to the GMP requirements for the production of radio pharmaceuticals. The irradiated targets will be transported directly into the appropriate hot cell for radiochemical processing, All cells will be equipped with a target dissolution unit for etching the irradiated, electroplated film. After decontamination and sufficient cooling down, these targets will be reused several times. (C) 2001 Elsevier Science B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Solid targetry at the TESLA Accelerator Installation",
volume = "480",
number = "1",
pages = "7-15",
doi = "10.1016/S0168-9002(01)02040-X"
}

Čomor, J. J., Dakovic, M., Rajcevic, M., Košutić, D. D., Spasic, M., Vidovic, A., Duricic, J.,& Nedeljković, N.. (2002). Solid targetry at the TESLA Accelerator Installation. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 480(1), 7-15.
https://doi.org/10.1016/S0168-9002(01)02040-X

Čomor JJ, Dakovic M, Rajcevic M, Košutić DD, Spasic M, Vidovic A, Duricic J, Nedeljković N. Solid targetry at the TESLA Accelerator Installation. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2002;480(1):7-15.
doi:10.1016/S0168-9002(01)02040-X .

Čomor, Jožef J., Dakovic, M, Rajcevic, M, Košutić, Duško D., Spasic, M, Vidovic, A, Duricic, J, Nedeljković, N., "Solid targetry at the TESLA Accelerator Installation" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 480, no. 1 (2002):7-15,
https://doi.org/10.1016/S0168-9002(01)02040-X . .