Polonium formation in Pb–55.5Bi under proton irradiation

Glasbrenner, H.; Eikenberg, J.; Gröschel, F.; Zanini, L.

doi:10.1016/j.jnucmat.2004.07.040

Cited by 5 publications

(3 citation statements)

References 4 publications

(3 reference statements)

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“…Low-energy accelerators have been proposed to simulate issues like detection, trapping with suitable filters, safe storage etc. of polonium-210 produced [10]. However, we are proposing the low-energy accelerators for thermal-hydraulic simulation studies.…”

Section: One-way Coupled Indian Adsmentioning

confidence: 99%

Thermal hydraulic studies of spallation target for one-way coupled indian accelerator driven systems with low energy proton beam

2007

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BARC has recently proposed a one-way coupled ADS reactor. This reactor requires typically ∼1 GeV proton beam with 2 mA of current. Approximately 8 kW of heat is deposited in the window of the target. Circulating liquid metal target (lead/leadbismuth-eutectic) has to extract this heat and this is a critical R&D problem to be solved. At present there are very few accelerators, which can give few mA and high-energy proton beam. However, accelerators with low energy and hundreds of micro-ampere current are commercially available. In view of this, it is proposed in this paper to simulate beam window heating of ∼8 kW in the target with low-energy proton beam. Detailed thermal analysis in the spallation and window region has been carried out to study the capability of heat extraction by circulating LBE for a typical target loop with a proton beam of 30 MeV energy and current of 0.267 mA. The heat deposition study is carried out using FLUKA code and flow analysis by CFD code. The detailed analysis of this work is presented in this paper.

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Section: One-way Coupled Indian Adsmentioning

confidence: 99%

Thermal hydraulic studies of spallation target for one-way coupled indian accelerator driven systems with low energy proton beam

2007

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“…If the cumulative radiation dosage reaches 4 MBq/kg-body-mass in a short time, it will be fatal to the human body. Therefore, to achieve the wide use of LBE in nuclear energy applications, an effective Po pollution prevention system must be established [5,6]. At present, polonium in molten LBE can be effectively removed by lead-polonium distillation, Po-hydride separation, rare-earth filtration, and alkaline extraction [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Removal of the Homolog Tellurium of Polonium by SiO2 Nanofiber Filter for Lead Alloy-Cooled Reactors

Chen

Zeng

et al. 2022

Toxics

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The lead–bismuth eutectic (LBE) can be easily activated by neutron radiation to produce the radionuclide 210Po. It is therefore necessary to establish an effective method to remove vaporized polonium in the cover gas to prevent its release into the air in scenarios of reactor maintenance and coolant leakage accidents. This paper presents a SiO2 nanofiber membrane prepared based on the electrostatic spinning and calcination process. The SiO2 nanofiber membrane had the advantages of good flexibility, high-temperature resistance, and corrosion resistance. In the trapping experiments, the SiO2 nanofiber membrane filters showed excellent filtration performance at 300~400 °C, and the filtration efficiencies for Te, Pb, and Bi could reach 99%, 99%, and 98%, respectively. Proper filtration temperature and gas flow rate are important to maintain high filtration efficiency. After five cycles, the SiO2 nanofiber membrane filter still exhibited excellent cycle-use performance. In the density functional theory (DFT) calculations, PbPo and PbTe had strong interactions with amorphous SiO2, having adhesion energies of −2.96 to −2.83 eV/molecule.

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“…Glasbrenner et al [11] investigated the production of Po radionuclides by irradiating LBE targets of 2 mm thickness and 16 mm diameter with protons having 71 and 590 MeV energy. They found the formation of 206 Po and 208 Po radioisotopes in the targets and concluded that the specific activity ratio of 206 Po/ 208 Po is dependent on the energy and intensity of the proton beam.…”

Section: Introductionmentioning

confidence: 99%

Comparison on the production of radionuclides in 1.4 GeV proton irradiated LBE targets of different thickness

Maiti

Ghosh

Mendonça

et al. 2014

J Radioanal Nucl Chem

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Polonium formation in Pb–55.5Bi under proton irradiation

Cited by 5 publications

References 4 publications

Thermal hydraulic studies of spallation target for one-way coupled indian accelerator driven systems with low energy proton beam

Thermal hydraulic studies of spallation target for one-way coupled indian accelerator driven systems with low energy proton beam

Removal of the Homolog Tellurium of Polonium by SiO2 Nanofiber Filter for Lead Alloy-Cooled Reactors

Comparison on the production of radionuclides in 1.4 GeV proton irradiated LBE targets of different thickness

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