The dependences of resistivity (p), thermoelectromotive force (a) voltage-current characteristic ... more The dependences of resistivity (p), thermoelectromotive force (a) voltage-current characteristic of thin zirconium film 8CM200 mkm of thick from adsorbed dose of y-quantum have been investigated. It’s been found out that when initial meanings of absorbed dose are insignificant (D<20kGy) in Zr-ZrC>2 system p is decreased at the expense of formation of point defects (biographic protective oxide film). The further increase of absorbed dose (up to definite value) leads to radiation-heterogeneous processes of protective oxide film formation with high vacancy concentration that is accompanied with p increase.
The article reviews the distribution of natural uranium radionuclides occuring in natural isotopi... more The article reviews the distribution of natural uranium radionuclides occuring in natural isotopic ratios of uranium, in water samples taken from rivers of central regions of Azerbaijan. Quantity of radionuclides (226 R , 228 Ra, 40 K, 137 Cs) in water samples has been determined through the use of qamma-spectrometric methods. Activity of radionuclides (226 Ra, 228 Ra, 40 K,) in river water samples changes within intervals 226 Ra (0.14Bq/l-0.95Bq/l), 228 Ra(0.18Bq/l-0.58Bq/l) and 40 K (5.6Bq/l-34.6Bq/l).
Protection of Metals and Physical Chemistry of Surfaces, 2015
Uranyl silicates with different contents of uranyl are synthesized. For comparison, the radiation... more Uranyl silicates with different contents of uranyl are synthesized. For comparison, the radiation catalytic activities of uranyl silicate with 10% of uranium and initial silicate are studied in the process of radi olytic decomposition of water. Heterogeneous water radiolysis is investigated in the adsorbed and liquid states in contact with uranyl silicate and silicate samples. The effect of the uranyl cations, water state, and process temperature on the yield of molecular hydrogen is revealed. Mechanisms of heterogeneous water radiolysis involving the samples of uranyl silicate and silicate under study are suggested.
Nato Science Series: IV: Earth and Environmental Sciences
Tobacco is one of the most usable plant and its goods are utilized in the production of medicines... more Tobacco is one of the most usable plant and its goods are utilized in the production of medicines. Lately, several natural radioactive elements contained in tobacco caused the greatest anxiety. The research using a gamma-spectrometric and radiometric link the regularity of the distribution of the natural radionuclides (U-238, Ra-226, Th-232, K-40) have been described due to the scheme: about soil
Maleic anhydride-styrene-1,4-di(4-isopropenylphenoxy)butane terpolymer was tested as sorbent for ... more Maleic anhydride-styrene-1,4-di(4-isopropenylphenoxy)butane terpolymer was tested as sorbent for treatment of aqueous solutions, including oil-fi eld brines, to remove uranium salts.
ABSTRACT For phenol sorption from aqueous solutions, phosphorus containing sorbent obtained on th... more ABSTRACT For phenol sorption from aqueous solutions, phosphorus containing sorbent obtained on the basis of phosphochlorinated polybutadiene has been used. Experiments were carried out in dependence of sorbent concentration, contact time and phenol concentration. Equilibrium sorption characteristics have been investigated by Langmuir and Freundlich models, and it was established that, at initial phenol concentration up to 346·0 mg L−1, sorption obeys the Freundlich equation and, under higher initial phenol concentration, the Langmuir equation.
The results of an experimental study of the stochastic fluctuations of the energy of IBR-2M pulse... more The results of an experimental study of the stochastic fluctuations of the energy of IBR-2M pulses, which are used to obtain some parameters of the reactor kinetics, are presented. A pulse energy sequence was recorded at different average power levels and the distribution parameters were calculated. An ionization chamber, placed near the core, with boron was used as the neutron detector. The results obtained made it possible to evaluate the following: the average lifetime of prompt neutrons τ = (6.5 ± 0.2)•10-8 sec, the absolute power of the reactor and the source of spontaneous-fission neutrons S sp ≤ (6.72 ± 0.12)•10 6 sec-1. It is shown that the experimental results are close to the computational results. Just as in the IBR-2 reactor, there are two main reasons for the energy fluctuations of the pulses of the modernized IBR-2M reactor: 1) the stochastic nature of fission and neutron multiplication and 2) reactivity fluctuations. Stochastic noise dominates in the power fluctuations at low neutron intensity, and at power below 1 W the fluctuations can each 100%. Reactivity fluctuations can give rise to fluctuations of the energy in a pulse at any power level. Pulse energy fluctuations have a negative effect on IBR-2M dynamics, control and startup, the operation of instrumentation, and so forth. At the same time, the presence of fluctuations makes it possible to evaluate some nuclear-physical parameters of the core: the average lifetime of prompt neutrons, the intensity of the source of spontaneous-fission neutrons, the absolute power level and others. The IBR-2M pulsed fast research reactor with nominal power 2 MW is a modernized version of the IBR-2 reactor, which was shut down in 2006 because its service life had been exhausted [1]. The following were replaced in the process of modernization: the core with vessel, stationary reflectors and control and emergency protection organs. The IBR-2M core is characterized by smaller size and the absence of a central channel. Plutonium dioxide pellets serve as fuel. The reactivity modulator creates neutron pulses; this modulator has operated in IRBR-2 since 2004. The reactivity modulator consists of the main and auxiliary mobile reflectors. The rotor of the former is a blade with three teeth and that of the latter is blade with two teeth. The control and protections system organs regulate the IBR-2M reactivity; these organs consist of mobile tungsten blocks in a matrix of stationary reflectors (Fig. 1). Interrelation of the Stochastic Fluctuations of Pulse Energy and the Kinetics Parameters. The calculation of reactors and analysis of experiments are based on the neutron transport equations in which the neutron-flux density is taken to be the average flux; the statistical fluctuations are usually neglected. Actually, all elementary processes describing the creation and life of a neutron in a reactor are strongly stochastic. In IBR-2M, the stochastic fluctuations engendered in a single fission event with low neutron flux density in the core lead to significant energy fluctuations of the bursts. In some cases,
Radiation-catalytic properties of different matrices and zeolite-containing catalysts obtained fr... more Radiation-catalytic properties of different matrices and zeolite-containing catalysts obtained from them were studied in the radiolysis of water. It was found that on transition from Mg-Si to Al-Mg-Si and Al-Si, the radiation-catalytic activity increased. As a result of the mutual influence of the matrix and the zeolite component, the zeolite-containing catalysts acquire a higher radiation-catalytic activity than do their components. The observed regularity in the change in the radiation-catalytic activity with change in their composition indicates the participation of the (AlO/sub n/)-polyhedra as active centers in the radiolysis of water.
International Journal of Materials Science and Applications, 2014
The electrophysical properties of the surface of metallic beryllium were studied before and after... more The electrophysical properties of the surface of metallic beryllium were studied before and after radiation-thermal treatment in water medium at temperatures 473 –773K under the influence of gamma quanta. On the features of the curves current-voltage characteristics it is established that radiation-thermal modification of the surface of beryllium is accompanied by the formation of oxide structures, defects which are determined by the temperature and time of irradiation. It is shown, that the formation of continuous oxide layer with dielectric properties leads to the increase of the surface resistivity by order. It was a comparative study the kinetics of changes in the values of surface resistivity of contact time for radiation - thermal and thermal oxidized beryllium samples. It was revealed stimulating role of radiation at relatively low temperatures in the oxidation process.
International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 1988
The accumulation of radiation-induced defects and of H-atoms on y-irradiation of a B203 + H20 sys... more The accumulation of radiation-induced defects and of H-atoms on y-irradiation of a B203 + H20 system, at 77 K, at different concentrations of water molecules have been investigated by ESR. The radiation-chemical yields of paramagnetic centres and of H-atoms have been determined from appropriate kinetic curves. It has been established that increasing the concentration of water molecules in the system results in a lowering of the yield of paramagnetic centres and an increase in the H-atom concentration. On the basis of the results obtained a mechanism has been suggested for heterogeneous radiation processes in this system at 77 K.
The dependences of resistivity (p), thermoelectromotive force (a) voltage-current characteristic ... more The dependences of resistivity (p), thermoelectromotive force (a) voltage-current characteristic of thin zirconium film 8CM200 mkm of thick from adsorbed dose of y-quantum have been investigated. It’s been found out that when initial meanings of absorbed dose are insignificant (D<20kGy) in Zr-ZrC>2 system p is decreased at the expense of formation of point defects (biographic protective oxide film). The further increase of absorbed dose (up to definite value) leads to radiation-heterogeneous processes of protective oxide film formation with high vacancy concentration that is accompanied with p increase.
The article reviews the distribution of natural uranium radionuclides occuring in natural isotopi... more The article reviews the distribution of natural uranium radionuclides occuring in natural isotopic ratios of uranium, in water samples taken from rivers of central regions of Azerbaijan. Quantity of radionuclides (226 R , 228 Ra, 40 K, 137 Cs) in water samples has been determined through the use of qamma-spectrometric methods. Activity of radionuclides (226 Ra, 228 Ra, 40 K,) in river water samples changes within intervals 226 Ra (0.14Bq/l-0.95Bq/l), 228 Ra(0.18Bq/l-0.58Bq/l) and 40 K (5.6Bq/l-34.6Bq/l).
Protection of Metals and Physical Chemistry of Surfaces, 2015
Uranyl silicates with different contents of uranyl are synthesized. For comparison, the radiation... more Uranyl silicates with different contents of uranyl are synthesized. For comparison, the radiation catalytic activities of uranyl silicate with 10% of uranium and initial silicate are studied in the process of radi olytic decomposition of water. Heterogeneous water radiolysis is investigated in the adsorbed and liquid states in contact with uranyl silicate and silicate samples. The effect of the uranyl cations, water state, and process temperature on the yield of molecular hydrogen is revealed. Mechanisms of heterogeneous water radiolysis involving the samples of uranyl silicate and silicate under study are suggested.
Nato Science Series: IV: Earth and Environmental Sciences
Tobacco is one of the most usable plant and its goods are utilized in the production of medicines... more Tobacco is one of the most usable plant and its goods are utilized in the production of medicines. Lately, several natural radioactive elements contained in tobacco caused the greatest anxiety. The research using a gamma-spectrometric and radiometric link the regularity of the distribution of the natural radionuclides (U-238, Ra-226, Th-232, K-40) have been described due to the scheme: about soil
Maleic anhydride-styrene-1,4-di(4-isopropenylphenoxy)butane terpolymer was tested as sorbent for ... more Maleic anhydride-styrene-1,4-di(4-isopropenylphenoxy)butane terpolymer was tested as sorbent for treatment of aqueous solutions, including oil-fi eld brines, to remove uranium salts.
ABSTRACT For phenol sorption from aqueous solutions, phosphorus containing sorbent obtained on th... more ABSTRACT For phenol sorption from aqueous solutions, phosphorus containing sorbent obtained on the basis of phosphochlorinated polybutadiene has been used. Experiments were carried out in dependence of sorbent concentration, contact time and phenol concentration. Equilibrium sorption characteristics have been investigated by Langmuir and Freundlich models, and it was established that, at initial phenol concentration up to 346·0 mg L−1, sorption obeys the Freundlich equation and, under higher initial phenol concentration, the Langmuir equation.
The results of an experimental study of the stochastic fluctuations of the energy of IBR-2M pulse... more The results of an experimental study of the stochastic fluctuations of the energy of IBR-2M pulses, which are used to obtain some parameters of the reactor kinetics, are presented. A pulse energy sequence was recorded at different average power levels and the distribution parameters were calculated. An ionization chamber, placed near the core, with boron was used as the neutron detector. The results obtained made it possible to evaluate the following: the average lifetime of prompt neutrons τ = (6.5 ± 0.2)•10-8 sec, the absolute power of the reactor and the source of spontaneous-fission neutrons S sp ≤ (6.72 ± 0.12)•10 6 sec-1. It is shown that the experimental results are close to the computational results. Just as in the IBR-2 reactor, there are two main reasons for the energy fluctuations of the pulses of the modernized IBR-2M reactor: 1) the stochastic nature of fission and neutron multiplication and 2) reactivity fluctuations. Stochastic noise dominates in the power fluctuations at low neutron intensity, and at power below 1 W the fluctuations can each 100%. Reactivity fluctuations can give rise to fluctuations of the energy in a pulse at any power level. Pulse energy fluctuations have a negative effect on IBR-2M dynamics, control and startup, the operation of instrumentation, and so forth. At the same time, the presence of fluctuations makes it possible to evaluate some nuclear-physical parameters of the core: the average lifetime of prompt neutrons, the intensity of the source of spontaneous-fission neutrons, the absolute power level and others. The IBR-2M pulsed fast research reactor with nominal power 2 MW is a modernized version of the IBR-2 reactor, which was shut down in 2006 because its service life had been exhausted [1]. The following were replaced in the process of modernization: the core with vessel, stationary reflectors and control and emergency protection organs. The IBR-2M core is characterized by smaller size and the absence of a central channel. Plutonium dioxide pellets serve as fuel. The reactivity modulator creates neutron pulses; this modulator has operated in IRBR-2 since 2004. The reactivity modulator consists of the main and auxiliary mobile reflectors. The rotor of the former is a blade with three teeth and that of the latter is blade with two teeth. The control and protections system organs regulate the IBR-2M reactivity; these organs consist of mobile tungsten blocks in a matrix of stationary reflectors (Fig. 1). Interrelation of the Stochastic Fluctuations of Pulse Energy and the Kinetics Parameters. The calculation of reactors and analysis of experiments are based on the neutron transport equations in which the neutron-flux density is taken to be the average flux; the statistical fluctuations are usually neglected. Actually, all elementary processes describing the creation and life of a neutron in a reactor are strongly stochastic. In IBR-2M, the stochastic fluctuations engendered in a single fission event with low neutron flux density in the core lead to significant energy fluctuations of the bursts. In some cases,
Radiation-catalytic properties of different matrices and zeolite-containing catalysts obtained fr... more Radiation-catalytic properties of different matrices and zeolite-containing catalysts obtained from them were studied in the radiolysis of water. It was found that on transition from Mg-Si to Al-Mg-Si and Al-Si, the radiation-catalytic activity increased. As a result of the mutual influence of the matrix and the zeolite component, the zeolite-containing catalysts acquire a higher radiation-catalytic activity than do their components. The observed regularity in the change in the radiation-catalytic activity with change in their composition indicates the participation of the (AlO/sub n/)-polyhedra as active centers in the radiolysis of water.
International Journal of Materials Science and Applications, 2014
The electrophysical properties of the surface of metallic beryllium were studied before and after... more The electrophysical properties of the surface of metallic beryllium were studied before and after radiation-thermal treatment in water medium at temperatures 473 –773K under the influence of gamma quanta. On the features of the curves current-voltage characteristics it is established that radiation-thermal modification of the surface of beryllium is accompanied by the formation of oxide structures, defects which are determined by the temperature and time of irradiation. It is shown, that the formation of continuous oxide layer with dielectric properties leads to the increase of the surface resistivity by order. It was a comparative study the kinetics of changes in the values of surface resistivity of contact time for radiation - thermal and thermal oxidized beryllium samples. It was revealed stimulating role of radiation at relatively low temperatures in the oxidation process.
International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 1988
The accumulation of radiation-induced defects and of H-atoms on y-irradiation of a B203 + H20 sys... more The accumulation of radiation-induced defects and of H-atoms on y-irradiation of a B203 + H20 system, at 77 K, at different concentrations of water molecules have been investigated by ESR. The radiation-chemical yields of paramagnetic centres and of H-atoms have been determined from appropriate kinetic curves. It has been established that increasing the concentration of water molecules in the system results in a lowering of the yield of paramagnetic centres and an increase in the H-atom concentration. On the basis of the results obtained a mechanism has been suggested for heterogeneous radiation processes in this system at 77 K.
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