Pub Date : 2016-12-21DOI: 10.11648/J.NS.20180301.11
B. N. Niri
A study is made of nuclear size corrections to the energy levels of single-electron atoms for the ground state of hydrogen like atoms. We consider Fermi charge distribution to the nucleus and calculate atomic energy level shift due to the finite size of the nucleus in the context of perturbation theory. The exact relativistic correction based upon the available analytical calculations is compared to the result of first-order relativistic perturbation theory and the non-relativistic approximation. We find small discrepancies between our perturbative results and those obtained from exact relativistic calculation even for large nuclear charge number Z.
{"title":"Nuclear Size Corrections to the Energy Levels of Single-Electron Atoms","authors":"B. N. Niri","doi":"10.11648/J.NS.20180301.11","DOIUrl":"https://doi.org/10.11648/J.NS.20180301.11","url":null,"abstract":"A study is made of nuclear size corrections to the energy levels of single-electron atoms for the ground state of hydrogen like atoms. We consider Fermi charge distribution to the nucleus and calculate atomic energy level shift due to the finite size of the nucleus in the context of perturbation theory. The exact relativistic correction based upon the available analytical calculations is compared to the result of first-order relativistic perturbation theory and the non-relativistic approximation. We find small discrepancies between our perturbative results and those obtained from exact relativistic calculation even for large nuclear charge number Z.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"41 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2016-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78129997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-12-19DOI: 10.11648/j.ns.20160101.11
M. Mehrabova
It has been obtained Pb1-xMnxTe (x=0.04) epitaxial films on BaF2 substrates at 10-4Pa vacuum by molecular beam condensation method and studied the impact of electron-beam radiation on their electrical properties. From temperature dependence curves of electrical conductivity it has been determined that the electrical conductivity decreases with an increase of Mn concentration. Influence of electron flux Ф=2·1015см-2 (E=4.5MeV,) leads to a decrease of electrical conductivity due to the compensation of local level, further increase of radiation dose up to Ф=1016см-2 increases the electrical conductivity. It has been investigated the impact of electron-beam radiation on VAC.
{"title":"Impact of Electron-Beam Radiation on Electrical Properties of Pb 1-x Mn x Te Epitaxial Films","authors":"M. Mehrabova","doi":"10.11648/j.ns.20160101.11","DOIUrl":"https://doi.org/10.11648/j.ns.20160101.11","url":null,"abstract":"It has been obtained Pb1-xMnxTe (x=0.04) epitaxial films on BaF2 substrates at 10-4Pa vacuum by molecular beam condensation method and studied the impact of electron-beam radiation on their electrical properties. From temperature dependence curves of electrical conductivity it has been determined that the electrical conductivity decreases with an increase of Mn concentration. Influence of electron flux Ф=2·1015см-2 (E=4.5MeV,) leads to a decrease of electrical conductivity due to the compensation of local level, further increase of radiation dose up to Ф=1016см-2 increases the electrical conductivity. It has been investigated the impact of electron-beam radiation on VAC.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"14 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2016-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76155957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-13DOI: 10.11648/j.ns.20220703.11
V. Kizka
The method of comparison of theoretical predictions with experimental data had been developed.This method allows estimate the quality of theory. Published theoretical data of the three-fluid dynamic (3FD) model applied to the experimental data from heavy-ion collisions at the energy range $sqrt{s_{NN}},=,2.7 - 63$ GeV were used as example of application of the developed methodology.
{"title":"Comparison of the 3-Fluid Dynamic Model with Experimental Data","authors":"V. Kizka","doi":"10.11648/j.ns.20220703.11","DOIUrl":"https://doi.org/10.11648/j.ns.20220703.11","url":null,"abstract":"The method of comparison of theoretical predictions with experimental data had been developed.This method allows estimate the quality of theory. Published theoretical data of the three-fluid dynamic (3FD) model applied to the experimental data from heavy-ion collisions at the energy range $sqrt{s_{NN}},=,2.7 - 63$ GeV were used as example of application of the developed methodology.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81198101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-45-EN
A. Mendoza, Pamela F. Nelson, J. François
Throughout the past decades, the need to reduce greenhouse gas emissions has prompted the development of technologies for the production of clean fuels through the use of zero emissions primary energy resources, such as heat from high temperature nuclear reactors. One of the most promising of these technologies is the generation of hydrogen by the sulphur-iodine cycle coupled to a high temperature nuclear reactor, initially proposed by General Atomics. By its nature and because these will have to be large-scale plants, development of these technologies from its current phase to its procurement and construction phase, will have to incorporate emergency mitigation systems in all its sections and nuclear-chemical "tie-in points" to prevent unwanted events that can compromise the integrity of the plant and the nearby population centres.
{"title":"Use of PSA for design of emergency mitigation systems in a hydrogen production plant using General Atomics SI cycle technology. Section II: Sulphuric acid decomposition","authors":"A. Mendoza, Pamela F. Nelson, J. François","doi":"10.1787/9789264087156-45-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-45-EN","url":null,"abstract":"Throughout the past decades, the need to reduce greenhouse gas emissions has prompted the development of technologies for the production of clean fuels through the use of zero emissions primary energy resources, such as heat from high temperature nuclear reactors. One of the most promising of these technologies is the generation of hydrogen by the sulphur-iodine cycle coupled to a high temperature nuclear reactor, initially proposed by General Atomics. By its nature and because these will have to be large-scale plants, development of these technologies from its current phase to its procurement and construction phase, will have to incorporate emergency mitigation systems in all its sections and nuclear-chemical \"tie-in points\" to prevent unwanted events that can compromise the integrity of the plant and the nearby population centres.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"64 1","pages":"397-406"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84022619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-25-EN
J. Leybros, P. Rivalier, A. Saturnin, S. Charton
The hybrid sulphur cycle is today one of the most promising processes to produce hydrogen on a massive scale within the scope of high temperature nuclear reactors development. Thus, the Fuel Cycle Technology Department at CEA Marcoule is involved in studying the hybrid sulphur process from a technical and economical performance standpoint. Based on mass and energy balance calculations, a ProsimPlusTM flow sheet and a commercial plant design were prepared. This work includes a study on sizing of the main equipment. The capital cost has been estimated using the major characteristics of main equipment based upon formulae and charts published in literature. A specific approach has been developed for electrolysers. Operational costs are also proposed for a plant producing 1 000 mol/s H2.
{"title":"Integrated laboratory scale demonstration experiment of the hybrid sulphur cycle and preliminary scale-up","authors":"J. Leybros, P. Rivalier, A. Saturnin, S. Charton","doi":"10.1787/9789264087156-25-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-25-EN","url":null,"abstract":"The hybrid sulphur cycle is today one of the most promising processes to produce hydrogen on a massive scale within the scope of high temperature nuclear reactors development. Thus, the Fuel Cycle Technology Department at CEA Marcoule is involved in studying the hybrid sulphur process from a technical and economical performance standpoint. Based on mass and energy balance calculations, a ProsimPlusTM flow sheet and a commercial plant design were prepared. This work includes a study on sizing of the main equipment. The capital cost has been estimated using the major characteristics of main equipment based upon formulae and charts published in literature. A specific approach has been developed for electrolysers. Operational costs are also proposed for a plant producing 1 000 mol/s H2.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"14 1","pages":"213-221"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78303158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-28-EN
M. Lewis, M. Ferrandon, D. Tatterson
This paper describes the status of the development effort for the Cu-Cl thermochemical cycle. Most of the recent work has been focused on the hydrolysis reaction, which is challenging because of the need for excess steam to achieve high yields. Two types of spray reactors were tested and the ultrasonic nozzle gave excellent results. The conceptual process design for the overall process now includes a spray reactor. Engineering methods to increase efficiency are proposed. Preliminary values for the efficiency and capital costs for producing hydrogen using the Cu-Cl cycle have been calculated.
{"title":"An overview of R&D activities for the Cu-Cl cycle with emphasis on the hydrolysis reaction","authors":"M. Lewis, M. Ferrandon, D. Tatterson","doi":"10.1787/9789264087156-28-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-28-EN","url":null,"abstract":"This paper describes the status of the development effort for the Cu-Cl thermochemical cycle. Most of the recent work has been focused on the hydrolysis reaction, which is challenging because of the need for excess steam to achieve high yields. Two types of spray reactors were tested and the ultrasonic nozzle gave excellent results. The conceptual process design for the overall process now includes a spray reactor. Engineering methods to increase efficiency are proposed. Preliminary values for the efficiency and capital costs for producing hydrogen using the Cu-Cl cycle have been calculated.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"338 1","pages":"235-242"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75344971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-6-EN
M. Ogawa, R. Hino, Y. Inagaki, K. Kunitomi, K. Onuki, H. Takegami
The high temperature gas-cooled reactor (HTGR), which is graphite-moderated and helium-cooled, is particularly attractive due to its unique capability of producing high temperature helium gas in addition to its fully inherent and passive safety characteristics. The HTGR-based production of hydrogen, the energy carrier for an emerging hydrogen economy, is expected to be among the most promising applications to solve the current environmental issues of CO2 emission. With this understanding the development studies of HTGR cogeneration system including hydrogen production have been carried out in Japan. This paper presents the 2100 vision of JAEA on future perspective of energy supply, especially on HTGR utilisation in the field of iron manufacturing, chemical industries, oil refineries, etc. In addition, this paper presents the present status of the HTTR Project including research and development activities of HTGR reactor technology, hydrogen production technology with the thermochemical water-splitting IS process, and the commercial HTGR plant design.
{"title":"Present status of HTGR and hydrogen production development in JAEA","authors":"M. Ogawa, R. Hino, Y. Inagaki, K. Kunitomi, K. Onuki, H. Takegami","doi":"10.1787/9789264087156-6-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-6-EN","url":null,"abstract":"The high temperature gas-cooled reactor (HTGR), which is graphite-moderated and helium-cooled, is particularly attractive due to its unique capability of producing high temperature helium gas in addition to its fully inherent and passive safety characteristics. The HTGR-based production of hydrogen, the energy carrier for an emerging hydrogen economy, is expected to be among the most promising applications to solve the current environmental issues of CO2 emission. With this understanding the development studies of HTGR cogeneration system including hydrogen production have been carried out in Japan. This paper presents the 2100 vision of JAEA on future perspective of energy supply, especially on HTGR utilisation in the field of iron manufacturing, chemical industries, oil refineries, etc. In addition, this paper presents the present status of the HTTR Project including research and development activities of HTGR reactor technology, hydrogen production technology with the thermochemical water-splitting IS process, and the commercial HTGR plant design.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"18 1","pages":"47-58"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83270612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-14-EN
M. Reytier, Jean-Luc Sarro, J. Juliaa
Gas tightness over a long period of time is a real challenge in high-temperature electrolysis. The seals must indeed be able to run at high temperature between metals and brittle ceramic materials, which is a major issue to be solved. The common sealing solution relies on glass-made seals, despite their low mechanical strength at high temperature. Metallic seals have seldom been used in this field, because their stiffness and their hardness require a much higher load to achieve the appropriate tightness.
{"title":"A metallic seal for high-temperature electrolysis stacks","authors":"M. Reytier, Jean-Luc Sarro, J. Juliaa","doi":"10.1787/9789264087156-14-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-14-EN","url":null,"abstract":"Gas tightness over a long period of time is a real challenge in high-temperature electrolysis. The seals must indeed be able to run at high temperature between metals and brittle ceramic materials, which is a major issue to be solved. The common sealing solution relies on glass-made seals, despite their low mechanical strength at high temperature. Metallic seals have seldom been used in this field, because their stiffness and their hardness require a much higher load to achieve the appropriate tightness.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"1 1","pages":"131-138"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83405403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-3-EN
F. Carré
I wish first to thank the organisers of this meeting who took the risk of inviting me to deliver this speech. I hope you have appetite for hydrogen and nuclear as by chance this is the subject of my talk. I took a great pleasure in reviewing the past history of hydrogen and nuclear energy, while considering how they had been important forever, how they have been used to change the world when they were discovered and understood, and how they will likely shape our future to face specific challenges of the 21st century. I hope I can make you share this interest and pleasure.
{"title":"Changing the world with hydrogen and nuclear","authors":"F. Carré","doi":"10.1787/9789264087156-3-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-3-EN","url":null,"abstract":"I wish first to thank the organisers of this meeting who took the risk of inviting me to deliver this speech. I hope you have appetite for hydrogen and nuclear as by chance this is the subject of my talk. I took a great pleasure in reviewing the past history of hydrogen and nuclear energy, while considering how they had been important forever, how they have been used to change the world when they were discovered and understood, and how they will likely shape our future to face specific challenges of the 21st century. I hope I can make you share this interest and pleasure.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"7 1","pages":"21-30"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89371302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1787/9789264087156-27-EN
G. Naterer
This paper presents recent Canadian advances in nuclear-based production of hydrogen with the thermochemical copper-chlorine (Cu-Cl) cycle. Current collaboration between UOIT, Atomic Energy of Canada Limited, Argonne National Laboratory and partner institutions is focusing on enabling technologies for the Cu-Cl cycle, through the Generation IV International Forum. This paper presents the recent advances in the development of individual reactor designs, thermal efficiency, process developments, corrosion resistant materials and linkage between nuclear and hydrogen plants. The paper provides an overview of latest advances by a Canadian consortium that is collaborating on equipment scale-up for the Cu-Cl cycle.
{"title":"Recent Canadian advances in the thermochemical Cu-Cl cycle for nuclear hydrogen production","authors":"G. Naterer","doi":"10.1787/9789264087156-27-EN","DOIUrl":"https://doi.org/10.1787/9789264087156-27-EN","url":null,"abstract":"This paper presents recent Canadian advances in nuclear-based production of hydrogen with the thermochemical copper-chlorine (Cu-Cl) cycle. Current collaboration between UOIT, Atomic Energy of Canada Limited, Argonne National Laboratory and partner institutions is focusing on enabling technologies for the Cu-Cl cycle, through the Generation IV International Forum. This paper presents the recent advances in the development of individual reactor designs, thermal efficiency, process developments, corrosion resistant materials and linkage between nuclear and hydrogen plants. The paper provides an overview of latest advances by a Canadian consortium that is collaborating on equipment scale-up for the Cu-Cl cycle.","PeriodicalId":88069,"journal":{"name":"Nuclear science abstracts","volume":"27 1","pages":"227-234"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79042894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：