R. Ocone - Profile on Academia.edu (original) (raw)
Papers by R. Ocone
Aspects of the Antarctic boundary layer observed by using a triaxial doppler sodar
SIGLEITItal
Acoustic sounder experimentation in Voctoria Land, Antarctica
SIGLEITItal
Analisi statistica dei venti catabatici nelle vicinanze della Base di RTerra Nova Bay-Antartide durante la Campagna 1987-88
SIGLEITItal
3 H, 14 C, 85 Kr and 129 I production in nuclear facilities
Applied Radiation and Isotopes, 2008
A method has been developed for determination of thorium isotopes in water and soil samples by a-... more A method has been developed for determination of thorium isotopes in water and soil samples by a-spectrometry. After fusion with Na 2 CO 3 and Na 2 O 2 at 600 1C, soil samples were leached with HNO 3 and HCl. Thorium in water sample or in soil leaching solution was coprecipitated together with iron (III) as hydroxides and/or carbonates at pH 9 with ammonia solution, separated from uranium and other a-emitters by a Microthene-TOPO (tri-octyl-phosphine oxide) chromatographic column, electrodeposited on a stainless steel disk, and measured by a-spectrometry. The method was checked with two certified reference materials supplied by the IAEA, and reliable results were obtained. The detection limits of the method for water (soil) samples are 0.44 mBq l À1 (0.070 Bq kg À1 ) for 232 Th, 0.80 mBq l À1 (0.13 Bq kg À1 ) for 230 Th and 1.0 mBq l À1 (0.16 Bq kg À1 ) for 228 Th, respectively, if 100 l of water (0.50 g) for each sample are analysed. A variety of water or soil samples were analysed using this procedure and giving average thorium yields of 75.5714.2% for water and 93.474.5% for soil. The obtained concentrations of thorium isotopes in water samples are in the range of 0.0007-0.0326 mBq l À1 for 232 Th, p0.0008-0.0258 mBq l À1 for 230 Th and 0.0014-1.32 mBq l À1 for 228 Th. The 230 Th/ 232 Th and 228 Th/ 232 Th ratios are in the range of p0.57-3.9 and 1.06-717, respectively. The disequilibrium between 232 Th and 228 Th activity in water is observed and the fate of thorium isotopes in water was studied. The exposure impact due to intake of thorium in the analysed drinking water was evaluated, showing a negligible amount of dose contribution. The concentrations of 232 Th, 230 Th and 228 Th in the analysed soil samples are in the range of 30.2-48.6, 32.5-60.5 and 31.0-53.0 Bq kg À1 , respectively. The obtained mean ratio is 1.0470.05 for 228 Th/ 232 Th and 1.2070.41 for 230 Th/ 232 Th.
A specific Concerning NORM in refractories industries
Dati sodar raccolti durante la campagna antartica 1987-88 a Terra Nova Bay con un sistema a tre ASSI Doppler
The Brasimone Study (BRASTUD). An Investigation of Atmospheric Dispersion over Complex Terrain
Radioprotection, 2002
A methodological procedure to date sediment cores by gamma measure of 2l0 Pb is proposed. This pr... more A methodological procedure to date sediment cores by gamma measure of 2l0 Pb is proposed. This procedure includes the self-absorption correction, experimentally obtained, and the sediment core dating, by software computation. Selection of detector type, sample container and measurement configuration are discussed. In the paper measurement corrections for core slices with very low content of sediment, with respect to the volume of reference calibration source, are also discussed. The method has been validated performing a comparison with two reference materials. As conclusion, the application of the procedure to sediment core coming from Venice lagoon is showed.
Intercomparison of suspended particles sampling methodologies
Accreditation and Quality Assurance, 2002
... Belli Sabrina Barbizzi Philippe Cyffroy Giovanni Paolo Fanzutti Volodya Kanivets Rita Ocone R... more ... Belli Sabrina Barbizzi Philippe Cyffroy Giovanni Paolo Fanzutti Volodya Kanivets Rita Ocone Raffaella ... large but typ-ically unknown uncertainty contribution to the final ana-lytical data. ... ance, METTLER AT 400 (0.0001 g). 5. Analytical effects: the gamma-emitters radionuclides ...
High energy proton interactions with Sr and Cs
Nuclear Instruments and Methods in Physics Research, 1983
ABSTRACT
Radiation protection dosimetry, 2005
Natural building materials, characterised by middle-low-activity concentrations of primordial rad... more Natural building materials, characterised by middle-low-activity concentrations of primordial radionuclides ((40)K, (232)Th and (238)U series) are widely used in Italy. Since natural materials reflect the geological variability of their sites of origin, a systematic study was carried out in the province of Rome and the results are reported in this paper. In the present work, in order to evaluate average, minimum and maximum contents of primordial radionuclides, more representative lithologies outcropping on the territory of the province of Rome were identified and around 150 samples were collected. Also, these lithologies were characterised from a radioprotection point of view, by means of the evaluation of the index, I, when they are used as building materials. The results confirm the high-primordial radionuclide content within some materials used in Latium (central Italy). Although the study was carried out in a limited area, the results confirm considerable variation in the primo...
Radiation Protection Dosimetry, 2004
Natural building materials, characterised by middle-low-activity concentrations of primordial rad... more Natural building materials, characterised by middle-low-activity concentrations of primordial radionuclides ( 40 K, 232 Th and 238 U series) are widely used in Italy. Since natural materials reflect the geological variability of their sites of origin, a systematic study was carried out in the province of Rome and the results are reported in this paper. In the present work, in order to evaluate average, minimum and maximum contents of primordial radionuclides, more representative lithologies outcropping on the territory of the province of Rome were identified and around 150 samples were collected. Also, these lithologies were characterised from a radioprotection point of view, by means of the evaluation of the index, I, when they are used as building materials. The results confirm the high-primordial radionuclide content within some materials used in Latium (central Italy). Although the study was carried out in a limited area, the results confirm considerable variation in the primordial radionuclide content depending on the sites of origin. Ã
Radiazioni Ionizzanti
annuario.apat.it
... CAPITOLO 15 Autori: Giovanni AGNESOD(3), Mario DIONISI(1), Leandro MAGRO(1), Giuseppe MENNA(1... more ... CAPITOLO 15 Autori: Giovanni AGNESOD(3), Mario DIONISI(1), Leandro MAGRO(1), Giuseppe MENNA(1), Rita OCONE(1), Carmelina SALIERNO(1), Francesco SALVI(1), Roberto SOGNI(2), Giancarlo TORRI(1), Flavio TROTTI(4), Chiara ZAMPIERI(4), Paolo ZEPPA(1 ...
Evaluation of the Performance of the Riser in the Fluid Catalytic Cracking Process
Petroleum Science and Technology, 2015
ABSTRACT
The influence of the fluidization velocities on products yield and catalyst residence time in industrial risers
Advanced Powder Technology, 2015
ABSTRACT
Sodar observations of the antarctic boundary layer in a deglaciated area: Preliminary results
Il Nuovo Cimento C, 1990
Summary A single-axis sodar system, with off-line Doppler analysis, has been operated in the mon... more Summary A single-axis sodar system, with off-line Doppler analysis, has been operated in the month of January 1987 at the Italian Antarctic base near Terra Nova Bay. The instrument was installed in complex terrain at a distance of approximately 1 km from the shore-line. During the campaign the area around the station, for a width of about (23) km from the
International Journal of Chemical Engineering, 2015
Feedstock conversion and yield products are studied through a 3D model simulating the main reacto... more Feedstock conversion and yield products are studied through a 3D model simulating the main reactor of the fluid catalytic cracking (FCC) process. Computational fluid dynamic (CFD) is used with Eulerian-Eulerian approach to predict the fluid catalytic cracking behavior. The model considers 12 lumps with catalyst deactivation by coke and poisoning by alkaline nitrides and polycyclic aromatic adsorption to estimate the kinetic behavior which, starting from a given feedstock, produces several cracking products. Different feedstock compositions are considered. The model is compared with sampling data at industrial operation conditions. The simulation model is able to represent accurately the products behavior for the different operating conditions considered. All the conditions considered were solved using a solver ANSYS CFX 14.0. The different operation process variables and hydrodynamic effects of the industrial riser of a fluid catalytic cracking (FCC) are evaluated. Predictions from the model are shown and comparison with experimental conversion and yields products are presented; recommendations are drawn to establish the conditions to obtain higher product yields in the industrial process.
Aspects of the Antarctic boundary layer observed by using a triaxial doppler sodar
SIGLEITItal
Acoustic sounder experimentation in Voctoria Land, Antarctica
SIGLEITItal
Analisi statistica dei venti catabatici nelle vicinanze della Base di RTerra Nova Bay-Antartide durante la Campagna 1987-88
SIGLEITItal
3 H, 14 C, 85 Kr and 129 I production in nuclear facilities
Applied Radiation and Isotopes, 2008
A method has been developed for determination of thorium isotopes in water and soil samples by a-... more A method has been developed for determination of thorium isotopes in water and soil samples by a-spectrometry. After fusion with Na 2 CO 3 and Na 2 O 2 at 600 1C, soil samples were leached with HNO 3 and HCl. Thorium in water sample or in soil leaching solution was coprecipitated together with iron (III) as hydroxides and/or carbonates at pH 9 with ammonia solution, separated from uranium and other a-emitters by a Microthene-TOPO (tri-octyl-phosphine oxide) chromatographic column, electrodeposited on a stainless steel disk, and measured by a-spectrometry. The method was checked with two certified reference materials supplied by the IAEA, and reliable results were obtained. The detection limits of the method for water (soil) samples are 0.44 mBq l À1 (0.070 Bq kg À1 ) for 232 Th, 0.80 mBq l À1 (0.13 Bq kg À1 ) for 230 Th and 1.0 mBq l À1 (0.16 Bq kg À1 ) for 228 Th, respectively, if 100 l of water (0.50 g) for each sample are analysed. A variety of water or soil samples were analysed using this procedure and giving average thorium yields of 75.5714.2% for water and 93.474.5% for soil. The obtained concentrations of thorium isotopes in water samples are in the range of 0.0007-0.0326 mBq l À1 for 232 Th, p0.0008-0.0258 mBq l À1 for 230 Th and 0.0014-1.32 mBq l À1 for 228 Th. The 230 Th/ 232 Th and 228 Th/ 232 Th ratios are in the range of p0.57-3.9 and 1.06-717, respectively. The disequilibrium between 232 Th and 228 Th activity in water is observed and the fate of thorium isotopes in water was studied. The exposure impact due to intake of thorium in the analysed drinking water was evaluated, showing a negligible amount of dose contribution. The concentrations of 232 Th, 230 Th and 228 Th in the analysed soil samples are in the range of 30.2-48.6, 32.5-60.5 and 31.0-53.0 Bq kg À1 , respectively. The obtained mean ratio is 1.0470.05 for 228 Th/ 232 Th and 1.2070.41 for 230 Th/ 232 Th.
A specific Concerning NORM in refractories industries
Dati sodar raccolti durante la campagna antartica 1987-88 a Terra Nova Bay con un sistema a tre ASSI Doppler
The Brasimone Study (BRASTUD). An Investigation of Atmospheric Dispersion over Complex Terrain
Radioprotection, 2002
A methodological procedure to date sediment cores by gamma measure of 2l0 Pb is proposed. This pr... more A methodological procedure to date sediment cores by gamma measure of 2l0 Pb is proposed. This procedure includes the self-absorption correction, experimentally obtained, and the sediment core dating, by software computation. Selection of detector type, sample container and measurement configuration are discussed. In the paper measurement corrections for core slices with very low content of sediment, with respect to the volume of reference calibration source, are also discussed. The method has been validated performing a comparison with two reference materials. As conclusion, the application of the procedure to sediment core coming from Venice lagoon is showed.
Intercomparison of suspended particles sampling methodologies
Accreditation and Quality Assurance, 2002
... Belli Sabrina Barbizzi Philippe Cyffroy Giovanni Paolo Fanzutti Volodya Kanivets Rita Ocone R... more ... Belli Sabrina Barbizzi Philippe Cyffroy Giovanni Paolo Fanzutti Volodya Kanivets Rita Ocone Raffaella ... large but typ-ically unknown uncertainty contribution to the final ana-lytical data. ... ance, METTLER AT 400 (0.0001 g). 5. Analytical effects: the gamma-emitters radionuclides ...
High energy proton interactions with Sr and Cs
Nuclear Instruments and Methods in Physics Research, 1983
ABSTRACT
Radiation protection dosimetry, 2005
Natural building materials, characterised by middle-low-activity concentrations of primordial rad... more Natural building materials, characterised by middle-low-activity concentrations of primordial radionuclides ((40)K, (232)Th and (238)U series) are widely used in Italy. Since natural materials reflect the geological variability of their sites of origin, a systematic study was carried out in the province of Rome and the results are reported in this paper. In the present work, in order to evaluate average, minimum and maximum contents of primordial radionuclides, more representative lithologies outcropping on the territory of the province of Rome were identified and around 150 samples were collected. Also, these lithologies were characterised from a radioprotection point of view, by means of the evaluation of the index, I, when they are used as building materials. The results confirm the high-primordial radionuclide content within some materials used in Latium (central Italy). Although the study was carried out in a limited area, the results confirm considerable variation in the primo...
Radiation Protection Dosimetry, 2004
Natural building materials, characterised by middle-low-activity concentrations of primordial rad... more Natural building materials, characterised by middle-low-activity concentrations of primordial radionuclides ( 40 K, 232 Th and 238 U series) are widely used in Italy. Since natural materials reflect the geological variability of their sites of origin, a systematic study was carried out in the province of Rome and the results are reported in this paper. In the present work, in order to evaluate average, minimum and maximum contents of primordial radionuclides, more representative lithologies outcropping on the territory of the province of Rome were identified and around 150 samples were collected. Also, these lithologies were characterised from a radioprotection point of view, by means of the evaluation of the index, I, when they are used as building materials. The results confirm the high-primordial radionuclide content within some materials used in Latium (central Italy). Although the study was carried out in a limited area, the results confirm considerable variation in the primordial radionuclide content depending on the sites of origin. Ã
Radiazioni Ionizzanti
annuario.apat.it
... CAPITOLO 15 Autori: Giovanni AGNESOD(3), Mario DIONISI(1), Leandro MAGRO(1), Giuseppe MENNA(1... more ... CAPITOLO 15 Autori: Giovanni AGNESOD(3), Mario DIONISI(1), Leandro MAGRO(1), Giuseppe MENNA(1), Rita OCONE(1), Carmelina SALIERNO(1), Francesco SALVI(1), Roberto SOGNI(2), Giancarlo TORRI(1), Flavio TROTTI(4), Chiara ZAMPIERI(4), Paolo ZEPPA(1 ...
Evaluation of the Performance of the Riser in the Fluid Catalytic Cracking Process
Petroleum Science and Technology, 2015
ABSTRACT
The influence of the fluidization velocities on products yield and catalyst residence time in industrial risers
Advanced Powder Technology, 2015
ABSTRACT
Sodar observations of the antarctic boundary layer in a deglaciated area: Preliminary results
Il Nuovo Cimento C, 1990
Summary A single-axis sodar system, with off-line Doppler analysis, has been operated in the mon... more Summary A single-axis sodar system, with off-line Doppler analysis, has been operated in the month of January 1987 at the Italian Antarctic base near Terra Nova Bay. The instrument was installed in complex terrain at a distance of approximately 1 km from the shore-line. During the campaign the area around the station, for a width of about (23) km from the
International Journal of Chemical Engineering, 2015
Feedstock conversion and yield products are studied through a 3D model simulating the main reacto... more Feedstock conversion and yield products are studied through a 3D model simulating the main reactor of the fluid catalytic cracking (FCC) process. Computational fluid dynamic (CFD) is used with Eulerian-Eulerian approach to predict the fluid catalytic cracking behavior. The model considers 12 lumps with catalyst deactivation by coke and poisoning by alkaline nitrides and polycyclic aromatic adsorption to estimate the kinetic behavior which, starting from a given feedstock, produces several cracking products. Different feedstock compositions are considered. The model is compared with sampling data at industrial operation conditions. The simulation model is able to represent accurately the products behavior for the different operating conditions considered. All the conditions considered were solved using a solver ANSYS CFX 14.0. The different operation process variables and hydrodynamic effects of the industrial riser of a fluid catalytic cracking (FCC) are evaluated. Predictions from the model are shown and comparison with experimental conversion and yields products are presented; recommendations are drawn to establish the conditions to obtain higher product yields in the industrial process.