Thermodynamic Modeling of Thermal Processes Involving Chlorine, Calcium, Beryllium, Nickel, and Cesium Radionuclides in the Course of Heating Radioactive Graphite in Steam

Барбин, Н. М.; Kobelev, A. M.; Terent’ev, D. I.; Алексеев, С. Г.

doi:10.1134/s1066362219020103

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Radioactive graphite burns with the formation of the gas phase shown in table 1 [9]. According to table 1, in the temperature range from 423 to 923 K, carbon is oxidized to form three gases: water gas (a mixture of hydrogen and carbon monoxide), carbon dioxide, and methane.…”

Section: Resultsmentioning

confidence: 99%

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Thermodynamic simulation of radioactive graphite combustion in water vapor

Барбин

Kobelev

Terent’ev

et al. 2022

J. Phys.: Conf. Ser.

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The paper analyzes the gas phase, the behavior uranium, the calculation of thermophysical properties during heating of nuclear reactor graphite containing various actinides. The study was carried out by thermodynamic modeling using the TERRA software package in the range from 423 to 2123 K at a constant pressure of 0.1 MPa. Up to a temperature of 623 K, the main components of the gas phase are water vapor, carbon dioxide, methane and hydrogen. Above 1023 K, the gas phase contains predominantly carbon dioxide and monoxide. It was revealed that in the range of 423-923 K uranium is present in the form of condensed compounds - uranium dioxide and uranyl chloride. Up to a temperature of 1623 K, uranium is present in the form of condensed uranium dioxide and calcium uranate. At temperatures above 2023 K, condensed uranium compounds are converted into gaseous and ionized compounds of uranium trioxide and dioxide. The thermophysical characteristics change unevenly up to a temperature of 923 K.

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Section: Resultsmentioning

confidence: 99%

“…Bauman. The program is widely used in scientific and industrial practice, combustion and explosion in the study of the behavior of chemically complex systems at elevated temperatures [4][5][6][7][8][9].…”

Section: Calculation Methodsmentioning

confidence: 99%

Thermodynamic simulation of radioactive graphite combustion in water vapor

Барбин

Kobelev

Terent’ev

et al. 2022

J. Phys.: Conf. Ser.

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Physicochemical processes of processing by flameless combustion of reactor graphite in nitrogen atmosphere at vacuum pressure

Shavaleev,

Barbin,

Terentyev

2023

AIP Conference Proceedings

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The behavior of radioactive metals (Am, Eu, Sr) during the processing of radioactive graphite in salt melts

Барбин

Kobelev

Terent’ev

et al. 2019

J. Phys.: Conf. Ser.

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The behavior of Am, Eu, Sr radionuclides was investigated by thermodynamic modeling method at heating of radioactive graphite in NaCl – KCl – Na2CO3 – K2CO3 molten salt with additives of nickel oxide NiO. The integrated thermodynamic analysis was carried out by means of TERRA software in temperature range 373-3273 K to determine possible composition of condensed and gaseous phases. It was established that americium is in gaseous state in temperature range 2773-3273 K. Europium is in the forms of gaseous EuO and Eu in temperature range 2373-3273 K. Strontium is in the forms of gaseous SrCl2, SrCl, Sr, SrO in temperature range 2373-3273 K.

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Thermodynamic Modeling of Thermal Processes Involving Chlorine, Calcium, Beryllium, Nickel, and Cesium Radionuclides in the Course of Heating Radioactive Graphite in Steam

Cited by 6 publications

References 3 publications

Thermodynamic simulation of radioactive graphite combustion in water vapor

Thermodynamic simulation of radioactive graphite combustion in water vapor

Physicochemical processes of processing by flameless combustion of reactor graphite in nitrogen atmosphere at vacuum pressure

The behavior of radioactive metals (Am, Eu, Sr) during the processing of radioactive graphite in salt melts

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