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Sample records for areva nc cadarache

  1. Intensive post operation clean out (Poco) in AREVA NC Cadarache dismantling projects: economic value and sustainable development

    International Nuclear Information System (INIS)

    After fabricating plutonium fuels for 40 years (Fast Breeder Reactor, MOX), commercial operations at the AREVA NC Cadarache plant ended in 2003 and post operation clean out of its production buildings and laboratory started. AREVA objective is to achieve IAEA level 2 cleanup of the process facilities and transfer them to their owner, the French Atomic Energy Commission (CEA). There are two main opposite dismantling scenarios: very limited cleanup to optimize man power, or intensive cleanup of the facilities to optimize the quantity of long lived level waste as much as possible. Economic and environmental considerations lead the choice between these two options. (author)

  2. Report on transparency and nuclear safety, Cadarache 2011, Volume 1 + Volume 2 INB 32 and 54 Areva NC

    International Nuclear Information System (INIS)

    For respectively different sites all situated in Cadarache, the CEA Centre on the one hand, and the AREVA nuclear base installation INB 32 and 54 on the other hand, these volumes propose a presentation of their activities and installations, a description of measures regarding safety and radiation protection, a description of significant events regarding nuclear safety and radiation protection, a presentation and discussion of results of measurements of releases and of their impact on the environment, and a description of the different radioactive wastes stored on the concerned site

  3. Report on transparency and nuclear safety 2013 - Cadarache CEA centre - Tome 1. INB 32 (ATPu) et 54 (LCP) AREVA NC - Tome 2

    International Nuclear Information System (INIS)

    A first volume proposes a presentation of the Cadarache CEA centre, of its activities and installations, gives a rather detailed overview of measures related to safety and to radiation protection within these activities and installations. It also reports significant events related to safety and to radiation protection which occurred in 2013 and have been declared to the ASN. It discusses the results of release measurements (liquid and gaseous effluents, radiological assessment, and chemical assessment for various installations) and the control of the chemical and radiological impact of these gaseous and liquid effluents on the environment. It addresses the issue of radioactive wastes which are stored in the different nuclear base installations of the Centre, indicates the different measures aimed at limiting the volume of these warehoused wastes and addresses their impact on health and on the environment. Nature and quantities of warehoused wastes are specified. The second volume concerns some specific installations (INB 32 or ATPu, and INB 54 or LPC) which belong to AREVA NC. The same topics are addressed: presentation of the facilities, arrangements regarding safety and radiation protection, significant events related to safety and radiation protection, measurements of effluents and their impact on the environment, warehoused wastes. Remarks and recommendations of the CHSCT are given

  4. Former radioactive waste storage sites: the case of the AREVA NC La Hague plant; Les anciens sites d'entreposage de dechets radioactifs: le cas de l'usine AREVA NC de La Hague

    Energy Technology Data Exchange (ETDEWEB)

    Houdre, Th. [Autorite de Surete Nucleaire, chef de la Division de Caen, 75 - Paris (France)

    2011-02-15

    Unlike AREVA NC's new UP2-800 and UP3 plants at La Hague, where the waste is conditioned in-line, the majority of waste produced while its first UP2-400 plant was still in service was stored without final packaging, at installations that no longer meet the safety requirements currently applicable. ASN believes that such storage facilities pose major safety problems. These problems are mainly related to the fact that little is known about the exact condition of certain storage facilities and the waste they contain, nor how they will evolve over time, as well as to former facility design and the inadequacy of early leak detection systems. Operations to recover this waste are technically complicated and require considerable resources and investment. As a result, the main issue as far as ASN is concerned is to ensure that the deadlines declared by AREVA are met, given that they are often dependent on the development of waste recovery procedures that do not as yet exist. For several years now, in view of the considerable delays affecting the majority of waste recovery projects, ASN has enforced the binding provisions set out under the TSN Act to set a schedule for the recovery of this old waste by prescribed dates. This situation serves to consolidate ASN's actions in requiring operators to assess, for all projects, the amount of waste generated, and to take measures for it to be processed and packaged as and when it is produced. (author)

  5. TAO2000 V2 computer-assisted force feedback tele-manipulators used as maintenance and production tools at the AREVA NC-La Hague fuel recycling plant

    International Nuclear Information System (INIS)

    During a 15-year joint research program, French Atomic Energy Agency Interactive Robotics Laboratory (CEA LIST) and AREVA have developed several remote operation devices, also called tele-robots. Some of them are now commonly used for maintenance operations at the AREVA NC (Nuclear Cycle) La Hague reprocessing plant. Since the first maintenance operation in 2005, several other successful interventions have been realized using the industrial MA23/RX170 tele-manipulation system. Moreover, since 2010, the through-the-wall tele-robot named MT200 TAO based on the slave arm of the MSM MT200 (La CalheneTM), has been evaluated in an active production cell at the AREVA NC La Hague fuel recycling plant. Although these evaluations are ongoing, the positive results obtained have led to an update and industrialization program. All these developments are based on the same generic control platform, called TAO2000 V2. TAO2000 V2 is the second release of the CEA LIST core software platform dedicated to computer aided force-feedback tele-operation (TAO is the French acronym for computer aided tele-operation). This paper presents all these developments resulting from the joint research program CEA LIST/AREVA. The TAO2000 V2 controller is first detailed, and then two maintenance operations using the industrial robot RX170 are presented: the removal of the nuclear fuel dissolver wheel rollers and the cleanup of the dissolver wheel inter-bucket spaces. Finally, the new MT200 TAO system and its evaluations at the AREVA NC La Hague facilities are discussed. (authors)

  6. Year 2005. GRNC's appreciation of the dose estimates presented in the annual environmental monitoring report of Areva-NC La Hague facility. Third GRNC viewpoint. Detailed report

    International Nuclear Information System (INIS)

    The 'Groupe Radioecologie Nord Cotentin' (GRNC) has carried out a very thorough evaluation of the assessment of doses due to discharges from the Cap de la Hague nuclear site carried out by Areva NC, the site operators. The group has looked at all aspects of the assessment methods and data to ensure that they agree with the results presented in the 2005 annual environmental report of the operator. The computer tool, ACADIE, developed to assess the doses, has been used by the GRNC members to carry out their own calculations. This document comprises the detailed report of the GRNC and its synthesis. The detailed report includes: 1 - critical analysis of the 2005 source term, the data transmitted by Areva NC (status of atmospheric effluents, status of liquid effluents at sea, fuel data, presentation of the work progress of the Areva NC working group), the history of liquid and gaseous effluents between 1966 and 2005; 2 - detailed comparison between model and 2005 measurements; 3 - detail of the 2005 efficient dose calculations. (J.S.)

  7. Global expertise of the ten-year environmental situation of AREVA N.C..2. part: environmental impact at the level of catchment basins and surveillance evaluation

    International Nuclear Information System (INIS)

    The second step of the expertise of the ten-year environmental assessment 1994-2003 of Areva NC allowed to complete the work on the themes and the sites that were not treated during the first step. The analysis concerned the impacts on the mine installations of the mine division of La Crouzille and more particularly of impacts observed since the sites refitting. The detail of this analysis and the results to which it allowed to achieve are the object of this present report. (N.C.)

  8. Year 2006. GRNC's appreciation of the dose estimates presented in the annual environmental monitoring report of Areva-NC La Hague facility. Forth GRNC viewpoint. Detailed report

    International Nuclear Information System (INIS)

    The 'Groupe Radioecologie Nord Cotentin' (GRNC) has carried out a very thorough evaluation of the assessment of doses due to discharges from the Cap de la Hague nuclear site carried out by Areva NC, the site operators. The group has looked at all aspects of the assessment methods and data to ensure that they agree with the results presented in the 2006 annual environmental report of the operator. The computer tool, ACADIE, developed to assess the doses, has been used by the GRNC members to carry out their own calculations. This document comprises the detailed report of the GRNC and its synthesis. The detailed report includes: 1 - a critical analysis of the 2006 source term; a note about the uranium content in liquid effluents; the data transmitted by Areva NC (status of atmospheric effluents, status of liquid effluents at sea, fuel data); the data transmitted by the IRSN - the French institute of radiation protection and nuclear safety (status of the radioactive effluents of Areva La Hague facility); the history of liquid and gaseous effluents between 1966 and 2006; 2 - detailed comparison between model and 2006 measurements; critical analysis of 14C and tritium data available for the Nord Cotentin and the English Channel area; 3 - detail of the 2006 efficient dose calculations; presentation of the environmental dispersion of tritium and of its effects on living organisms. (J.S.)

  9. ITER at Cadarache; ITER a Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-06-15

    This public information document presents the ITER project (International Thermonuclear Experimental Reactor), the definition of the fusion, the international cooperation and the advantages of the project. It presents also the site of Cadarache, an appropriate scientifical and economical environment. The last part of the documentation recalls the historical aspect of the project and the today mobilization of all partners. (A.L.B.)

  10. Report on transparency and nuclear safety - Cadarache CEA centre - 2012

    International Nuclear Information System (INIS)

    A first volume proposes a presentation of the Cadarache CEA centre, of its activities and installations, gives a rather detailed overview of measures related to safety and to radiation protection within these activities and installations. It also reports significant events related to safety and to radiation protection which occurred in 2012 and have been declared to the ASN. It discusses the results of release measurements (liquid and gaseous effluents, radiological assessment, and chemical assessment for various installations) and the control of the chemical and radiological impact of these gaseous and liquid effluents on the environment. It addresses the issue of radioactive wastes which are stored in the different nuclear base installations of the Centre, indicates the different measures aimed at limiting the volume of these warehoused wastes and addresses their impact on health and on the environment. Nature and quantities of warehoused wastes are specified. The second volume concerns some specific installations (INB 32 or ATPu, and INB 54 or LPC) which belong to AREVA NC. The same topics are addressed: presentation of the facilities, arrangements regarding safety and radiation protection, significant events related to safety and radiation protection, measurements of effluents and their impact on the environment, warehoused wastes. Remarks and recommendations of the CHSCT are given

  11. Near-field krypton-85 measurements in stable meteorological conditions around the AREVA NC La Hague reprocessing plant: estimation of atmospheric transfer coefficients

    International Nuclear Information System (INIS)

    The aim of this work was to study the near-field dispersion of 85Kr around the nuclear fuel reprocessing plant at La Hague (AREVA NC La Hague – France) under stable meteorological conditions. Twenty-two 85Kr night-time experimental campaigns were carried out at distances of up to 4 km from the release source. Although the operational Gaussian models predict for these meteorological conditions a distance to plume touchdown of several kilometers, we almost systematically observed a marked ground signal at distances of 0.5–4 km. The calculated atmospheric transfer coefficients (ATC) show values (1) higher than those observed under neutral conditions, (2) much higher than those proposed by the operational models, and (3) higher than those used in the impact assessments. - Highlights: • Measurements of 85Kr in air around reprocessing plant. • Measurement in stable meteorological conditions. • Determination of Atmospheric Transfer Coefficients (ATC). • Comparison with operational models. • ATC in stable conditions are higher than data from models

  12. Areva 2005 annual report

    International Nuclear Information System (INIS)

    This annual report contains information on AREVA's objectives, prospects and strategies, particularly in Chapters 4 and 7, as well as contains information on the markets, market shares and competitive position of the AREVA group. Content: 1 - Person responsible for the annual report and persons responsible for auditing the financial statements; 2 - Information pertaining to the transaction; 3 - General information on the company and share capital: Information on AREVA, Information on share capital and voting rights, Investment certificate trading, Dividends, Organizational chart of the AREVA group, Equity interests, Shareholders' agreements; 4 - Information on company operations, 5 - New developments and future prospects: Overview and strategy of the AREVA group, The Nuclear Power and Transmission and Distribution markets, AREVA group energy businesses, Front End Division, Reactors and Services Division, Back End Division, Transmission and Distribution Division, Major Contracts, The Group's principal sites, AREVA's customers and suppliers, Human resources, Sustainable Development and Continuous Improvement, Capital spending programs, Research and development, intellectual property and brand name programs, Risk and insurance; 6 - Assets - Financial position - financial performance: Analysis of and comments on the Group's financial position and performance, Human Resources report 2005, Environmental report, Consolidated financial statements, Notes to the consolidated financial statements, AREVA SA Financial statements 2005, Notes to the corporate financial statements; 7 - Corporate governance: Composition and functioning of administrative bodies, Executive compensation, Profit-sharing plans, AREVA Values Charter, Annual General Meeting of Shareholders of May 2, 2006; 8 - Recent developments and outlook: Events subsequent to year-end closing for 2005, Outlook

  13. Areva, reference document 2006

    International Nuclear Information System (INIS)

    This reference document contains information on the AREVA group's objectives, prospects and development strategies, particularly in Chapters 4 and 7. It contains information on the markets, market shares and competitive position of the AREVA group. Content: - 1 Person responsible for the reference document and persons responsible for auditing the financial statements; - 2 Information pertaining to the transaction (Not applicable); - 3 General information on the company and its share capital: Information on AREVA, on share capital and voting rights, Investment certificate trading, Dividends, Organization chart of AREVA group companies, Equity interests, Shareholders' agreements; - 4 Information on company operations, new developments and future prospects: Overview and strategy of the AREVA group, The Nuclear Power and Transmission and Distribution markets, The energy businesses of the AREVA group, Front End division, Reactors and Services division, Back End division, Transmission and Distribution division, Major contracts, The principal sites of the AREVA group, AREVA's customers and suppliers, Sustainable Development and Continuous Improvement, Capital spending programs, Research and development programs, intellectual property and trademarks, Risk and insurance; - 5 Assets - Financial position - Financial performance: Analysis of and comments on the group's financial position and performance, 2006 Human Resources Report, Environmental Report, Consolidated financial statements, Notes to the consolidated financial statements, AREVA SA financial statements, Notes to the corporate financial statements; 6 - Corporate Governance: Composition and functioning of corporate bodies, Executive compensation, Profit-sharing plans, AREVA Values Charter, Annual Combined General Meeting of Shareholders of May 3, 2007; 7 - Recent developments and future prospects: Events subsequent to year-end closing for 2006, Outlook; 8 - Glossary; 9 - Table of concordance

  14. Continuously tritium monitoring of the pipe of liquid effluents at the Cea Cadarache; Controle en continu du tritium de la conduite des effluents liquides du CEA Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    Pira, Y

    2004-07-01

    This report is oriented toward the radiation protection of environment that is an essential component of radiation protection. It is necessary to detect any solid, liquid or gaseous abnormal release and to find its origin. The present study bears on a detection instrument in continuously to find tritium in liquid effluents of the Cea Cadarache. After having study the functioning principle of this device, an evaluation of its performances has been realised ( back noise, yield, detection limit) and to a checking in real conditions of utilization. (N.C.)

  15. Areva, annual report 2004

    International Nuclear Information System (INIS)

    This annual report contains information on AREVA objectives, prospects and strategies, particularly in chapters 4 and 7. This information is a not meant as a presentation of past performance data and should not be interpreted as a guarantee that events or data set forth herein are assured or that objectives will be met. Forward looking statements made in this document also address known and unknown risks, uncertainties and other factors that could, were they to translate into fact, cause AREVA future financial performance, operating performance and production to differ significantly from the objectives presented or suggested herein. Those factors include, in particular, changes in international, economic or market conditions, as well as risk factors presented in Section 4.14.3. Neither AREVA nor the AREVA group is committing to updating forward looking statements or information contained in the annual report. This annual report contains information on the markets, market shares and competitive position of the AREVA group. Unless otherwise indicated, all historical data and forward looking information are based on Group estimates (source: AREVA) and are provided as examples only. To AREVA knowledge, no report is available on the AREVA group markets that is sufficiently complete or objective to serve as a sole reference source. The AREVA group developed estimates based on several sources, including in-house studies and reports, statistics provided by international organizations and professional associations, data published by competitors and information collected by AREVA subsidiaries. The main sources, studies and reports used include (i) the International Atomic Energy Agency (IAEA), the International Energy Agency (IEA), the World Nuclear Association (WNA), the Nuclear Energy Institute (NEA), Nuclear Assurance Corporation (NAC), the European Atomic Energy Community (Euratom) and the Commissariat a l'Energie Atomique (CEA) for the nuclear business; and (ii) the

  16. Areva, annual report 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This annual report contains information on AREVA objectives, prospects and strategies, particularly in chapters 4 and 7. This information is a not meant as a presentation of past performance data and should not be interpreted as a guarantee that events or data set forth herein are assured or that objectives will be met. Forward looking statements made in this document also address known and unknown risks, uncertainties and other factors that could, were they to translate into fact, cause AREVA future financial performance, operating performance and production to differ significantly from the objectives presented or suggested herein. Those factors include, in particular, changes in international, economic or market conditions, as well as risk factors presented in Section 4.14.3. Neither AREVA nor the AREVA group is committing to updating forward looking statements or information contained in the annual report. This annual report contains information on the markets, market shares and competitive position of the AREVA group. Unless otherwise indicated, all historical data and forward looking information are based on Group estimates (source: AREVA) and are provided as examples only. To AREVA knowledge, no report is available on the AREVA group markets that is sufficiently complete or objective to serve as a sole reference source. The AREVA group developed estimates based on several sources, including in-house studies and reports, statistics provided by international organizations and professional associations, data published by competitors and information collected by AREVA subsidiaries. The main sources, studies and reports used include (i) the International Atomic Energy Agency (IAEA), the International Energy Agency (IEA), the World Nuclear Association (WNA), the Nuclear Energy Institute (NEA), Nuclear Assurance Corporation (NAC), the European Atomic Energy Community (Euratom) and the Commissariat a l'Energie Atomique (CEA) for the nuclear business; and (ii

  17. Areva reference document 2007

    International Nuclear Information System (INIS)

    This reference document contains information on the AREVA group's objectives, prospects and development strategies, particularly in Chapters 4 and 7. It contains also information on the markets, market shares and competitive position of the AREVA group. Content: 1 - Person responsible for the reference document and persons responsible for auditing the financial statements; 2 - Information pertaining to the transaction (not applicable); 3 - General information on the company and its share capital: Information on Areva, Information on share capital and voting rights, Investment certificate trading, Dividends, Organization chart of AREVA group companies, Equity interests, Shareholders' agreements; 4 - Information on company operations, new developments and future prospects: Overview and strategy of the AREVA group, The Nuclear Power and Transmission and Distribution markets, The energy businesses of the AREVA group, Front End division, Reactors and Services division, Back End division, Transmission and Distribution division, Major contracts 140 Principal sites of the AREVA group, AREVA's customers and suppliers, Sustainable Development and Continuous Improvement, Capital spending programs, Research and Development programs, Intellectual Property and Trademarks, Risk and insurance; 5 - Assets financial position financial performance: Analysis of and comments on the group's financial position and performance, Human Resources report, Environmental report, Consolidated financial statements 2007, Notes to the consolidated financial statements, Annual financial statements 2007, Notes to the corporate financial statements; 6 - Corporate governance: Composition and functioning of corporate bodies, Executive compensation, Profit-sharing plans, AREVA Values Charter, Annual Ordinary General Meeting of Shareholders of April 17, 2008; 7 - Recent developments and future prospects: Events subsequent to year-end closing for 2007, Outlook; Glossary; table of concordance

  18. AREVA group overview; Presentation du groupe AREVA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-02-08

    This document presents the Group Areva, a world nuclear industry leader, from a financial holding company to an industrial group, operating in two businesses: the nuclear energy and the components. The structure and the market of the group are discussed, as the financial assets. (A.L.B.)

  19. Areva - 2011 Annual results

    International Nuclear Information System (INIS)

    Areva's backlog established at 45.6 billion euros at the end of 2011, significantly increasing at the end of a year marked by the Fukushima accident, confirms the commercial dynamism of the group alongside its customers and reinforces the visibility on its future business level. In a difficult context, the slight decline in revenue in 2011 demonstrates the robustness of Areva's integrated model, resting mainly on recurring business generated in relation to Areva's customers' nuclear installed base, and benefiting from the development of Areva's renewable energies operations. Free operating cash flow before tax, although down over the whole year in 2011, improved in the second half, showing the first effects of Areva's stronger focus on cash generation and debt management. After the success of Areva's bond issue in September 2011, the Group's liquidity remains high at the end of 2011. The Areva teams are now dedicating all of their efforts to the deployment of the 'Action 2016' strategic action plan, which had already yielded its first positive results at the end of 2011, with an improvement in the cost structure of Areva's operations, an increase in order intake, and the launch of several disposals of minority interests. Summary of the 2011 financial results: - Backlog: euro 45.6 bn, +3.1% vs. 2010, i.e +6.7% over 3 months; - Revenue: euro 8.872 bn, i.e -2.6% vs. 2010; - Operating income: - euro 1.923 bn; - Net income attributable to equity owners of the parent: - euro 2.424 bn; - EBITDA: euro 1.068 bn ( euro 420 m excluding Siemens impact); - Free operating cash flow before tax: - euro 2.397 bn (- euro 1.366 bn excluding Siemens impacts), improvement over the second half; - Decrease in net debt of euro 124 m for the year; - Significant drop in general and administrative expenses, with a noticeable reduction between the first and the second half; - Launch of several disposals of minority interests

  20. Report transparency and nuclear safety 2007 CEA Cadarache; Rapport transparence et securite nucleaire 2007 CEA Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This report presents the activities of the CEA Center of Cadarache for the year 2007. The actions concerning the safety, the radiation protection, the significant events, the release control and the environmental impacts and the wastes stored on the center are discussed. More especially the report discusses the beginning of the RJH reactor construction, the fourth generation reactors research programs, the implementing of la Rotonde the new radioactive wastes management installation, the renovation of the LECA. (A.L.B.)

  1. Areva in 2006

    International Nuclear Information System (INIS)

    This document is the 2006 activity report of the Areva group and presents the 2006 highlights of the nuclear division (front end of the nuclear cycle, pressurized water reactors, treatment and recycling of used nuclear fuel) and of the Transmission and Distribution division. Content: Message from the Chairman of the Supervisory Board; Message from the Chief Executive Officer; the World in 2006; Areva 2006 highlights; business review; key data; Areva around the World; policy of continuous innovation; five years of sustainable development; governance; Continuous improvement; Financial performance; Innovation; Customer satisfaction; Commitment to employees; Environmental protection; Risk management and prevention; Dialogue and consensus building; Community involvement; corporate governance; organization of the group; Share information and shareholder relations; glossary; learn more

  2. Areva: 2014 annual results

    International Nuclear Information System (INIS)

    The scale of the net loss for 2014 illustrates the twofold challenge confronting AREVA: continuing stagnation of the nuclear operations, lack of competitiveness and difficulties in managing the risks inherent in large projects. The group understands how serious this situation is. A comprehensive strategic review of operations was undertaken beginning in November 2014 and is being carried out without compromise. As a result, AREVA is now able to announce a solid transformation plan that sets a challenging but economically realistic course for its teams. First, AREVA will refocus on its core business: mastery of key nuclear processes essential to operators around the globe. This strategic redeployment will lead to the revision of certain goals, whether in the management of new reactor projects or in renewable energies. AREVA's objective is to achieve excellence as a high value-added supplier of products and services. Secondly, AREVA, whose resources had been marshaled to support a spurt of growth in nuclear power, must now adapt to new market realities and become competitive once again. The group's most urgent task is recovery and securing its future by immediately launching a far-reaching competitiveness plan founded on organizational simplification, quality of operations, and a completely revamped approach to managing risk in large projects. Last but not least, AREVA must ensure sustainable financing for its activities. A financing plan will be clarified before publication of the half-year financial statements. This document presents the key financial data of the group, its strategic road-map and its operating and financing plans

  3. TJ-II operation tracking from Cadarache

    International Nuclear Information System (INIS)

    The TJ-II remote participation system was designed to follow the TJ-II discharge production, even allowing the physicist in charge of operation to be in a remote location. The system has been based on both web servers and Java technology. These elements were chosen due to its open character, security properties, platform independence and technological maturity. Web pages and Java applications permit users to access experimental systems, data servers and the operation logbook. Security resources are provided by the PAPI system, a distributed authentication and authorization system. The TJ-II remote participation tools have allowed us to command and follow the stellarator operation from Cadarache. Over 1,000 digitizer channels and more than 20 diagnostic control systems were remotely available from web pages for monitoring/programming purposes. One Java application provided on-line information about the acquisition status of channels and acquisition cards. A second Java application showed temporal evolution signals that were refreshed in an automated way on the screen after each shot. A third Java application provided access to the operation logbook. In addition to these tools, we used the VRVS video conferencing system (FUSION community, X-Point room) and the EFDA Messenger Service for instant messaging (Jabber client). (Author)

  4. TJ-II operation tracking from Cadarache

    International Nuclear Information System (INIS)

    The TJ-II remote participation system was designed to follow the TJ-II discharge production, even allowing the physicist in charge of operation to be in a remote location. The system has been based on both web servers and Java technology. These elements were chosen due to its open character, security properties, platform independency and technological maturity. Web pages and Java applications permit users to access experimental systems, data servers and the operation logbook. Security resources are provided by the PAPI system, a distributed authentication and authorization system. The TJ-II remote participation tools have allowed us to command and follow the stellarator operation from Cadarache. Over 1,000 digitizer channels and more than 20 diagnostic control systems were remotely available from web pages for monitoring/programming purposes. One Java application provided on-line information about the acquisition status of channels and acquisition cards. A second Java application showed temporal evolution signals that were refreshed in an automated way on the screen after each shot. A third Java application provided access to the operation logbook. In addition to these tools, we used the VRVS videoconferencing system (FUSION community, X-Point room) and the EFDA Messenger Service for instant messaging (Jabber client). (author)

  5. Areva: experiences in outage services

    International Nuclear Information System (INIS)

    As the world leader in the nuclear industry, Areva is firmly committed to the safe and reliable operation of the Spanish nuclear power plants. Following this commitment, Areva has established the subsidiary Areva NP Services Spain as a local platform to provide nuclear services for the Spanish nuclear power plants. being integrated and supported by the global Areva Group, Areva NP Services Spain is able to offer services solutions to all customers demands while maintaining close and sustainable relationships with them. This integration also allows the Spanish personnel of Areva to employ their skills by working in multinational teams in international projects. This article will present the capacities, and the most important recent national and international project performed by Areva NP Services Spain in the field of outage services. (Author)

  6. AREVA in India

    International Nuclear Information System (INIS)

    India is the sixth largest energy consumer in the world and its demand is rising rapidly. To support its economic growth, estimated to be 8% on average over the last three years and to ensure access to electricity for all, the country foresees massive investments in its power sector over the next five years. India is therefore an essential market for the AREVA Group, where its Transmission and Distribution division plays a leading role on the strategic grid modernization market. This document presents: 1 - the economic situation in India: Key figures, Growth, India's growing need for electricity, India's energy sources and policy: current mix, driving role of the State, the financial reorganization of the SEBs, the 'Mega-Power' projects, the electricity act, the rural electrification program, the Investments. 2 - Civil nuclear energy: a strong potential for development; 3 - India's transmission and distribution network: the power challenge of the transmission network, the efficiency challenge of the distribution network. 4 - AREVA T and D in India: AREVA T and D profile, Areva's presence in India, market share, T and D customers and flagship projects

  7. The 2003 essential. AREVA

    International Nuclear Information System (INIS)

    This document presents the essential activities of the Areva Group, a world nuclear industry leader. This group proposes technological solutions to produce the nuclear energy and to transport the electric power. It develops connection systems for the telecommunication, the computers and the automotive industry. Key data on the program management, the sustainable development activities and the different divisions are provided. (A.L.B.)

  8. AREVA 2009 reference document

    International Nuclear Information System (INIS)

    This Reference Document contains information on the AREVA group's objectives, prospects and development strategies. It contains information on the markets, market shares and competitive position of the AREVA group. This information provides an adequate picture of the size of these markets and of the AREVA group's competitive position. Content: 1 - Person responsible for the Reference Document and Attestation by the person responsible for the Reference Document; 2 - Statutory and Deputy Auditors; 3 - Selected financial information; 4 - Risks: Risk management and coverage, Legal risk, Industrial and environmental risk, Operating risk, Risk related to major projects, Liquidity and market risk, Other risk; 5 - Information about the issuer: History and development, Investments; 6 - Business overview: Markets for nuclear power and renewable energies, AREVA customers and suppliers, Overview and strategy of the group, Business divisions, Discontinued operations: AREVA Transmission and Distribution; 7 - Organizational structure; 8 - Property, plant and equipment: Principal sites of the AREVA group, Environmental issues that may affect the issuer's; 9 - Analysis of and comments on the group's financial position and performance: Overview, Financial position, Cash flow, Statement of financial position, Events subsequent to year-end closing for 2009; 10 - Capital Resources; 11 - Research and development programs, patents and licenses; 12 -trend information: Current situation, Financial objectives; 13 - Profit forecasts or estimates; 14 - Administrative, management and supervisory bodies and senior management; 15 - Compensation and benefits; 16 - Functioning of corporate bodies; 17 - Employees; 18 - Principal shareholders; 19 - Transactions with related parties: French state, CEA, EDF group; 20 - Financial information concerning assets, financial positions and financial performance; 21 - Additional information: Share capital, Certificate of incorporation and by-laws; 22 - Major

  9. AREVA in China

    International Nuclear Information System (INIS)

    China has a great need for secure, safe, and economic energy supplies that combat the greenhouse effect and global warming. Since January 2002, China, the most heavily populated country with more than 1.3 billion inhabitants in a territory of 9.5 million km2 (17 times larger than France), has a nuclear capacity of 9 GWe with 11 nuclear plants on line. Forecasts of electricity consumption report a need for 900 to 1,000 GWe per year through 2020, and at this time the country's objective is to increase nuclear generated electricity from 1% to 4% of its total output. This means a need for additional 30 GWe, which is the equivalent of twenty 1,500 MWe reactors. In addition to nuclear power, China is pushing renewable energy. With the passage of the 2005 Renewable Energy Law, China's government imposed a national renewable energy requirement that is expected to boost the use of renewable energy capacity from 10 to 12 percent by 2020, up from 3% in 2003. This law requires power operators to buy electricity from alternative energy providers and gives economic incentives to these providers. Consequently, China is expanding its interests in renewable energy sources including wind and bio-energies, among others. It is in this context that AREVA, a world expert in energy, creates and offers solutions to generate, transmit, and distribute electricity for China. Based on its long experience and global presence, AREVA has become the worldwide leader for nuclear energy in the areas of construction, equipment, and services for nuclear power plants, and for the whole nuclear fuel cycle. AREVA is also a world leader in electrical power-grid equipment and systems. This document presents: China's need for energy; the Sources of China's energy mix; the challenges of China's nuclear program; AREVA's action in supporting China's ambitious nuclear program; the strong opportunities in renewable energy; and the high potential market for AREVA's T and D Division

  10. AREVA's nuclear reactors portfolio

    International Nuclear Information System (INIS)

    A reasonable assumption for the estimated new build market for the next 25 years is over 340 GWe net. The number of prospect countries is growing almost each day. To address this new build market, AREVA is developing a comprehensive portfolio of reactors intended to meet a wide range of power requirements and of technology choices. The EPR reactor is the flagship of the fleet. Intended for large power requirements, the four first EPRs are being built in Finland, France and China. Other countries and customers are in view, citing just two examples: the Usa where the U.S. EPR has been selected as the technology of choice by several U.S utilities; and the United Kingdom where the Generic Design Acceptance process of the EPR design submitted by AREVA and EDF is well under way, and where there is a strong will to have a plant on line in 2017. For medium power ranges, the AREVA portfolio includes a boiling water reactor and a pressurized water reactor which both offer all of the advantages of an advanced plant design, with excellent safety performance and competitive power generation cost: -) KERENA (1250+ MWe), developed in collaboration with several European utilities, and in particular with Eon; -) ATMEA 1 (1100+ MWe), a 3-loop evolutionary PWR which is being developed by AREVA and Mitsubishi. AREVA is also preparing the future and is deeply involved into Gen IV concepts. It has developed the ANTARES modular HTR reactor (pre-conceptual design completed) and is building upon its vast Sodium Fast Reactor experience to take part into the development of the next prototype. (author)

  11. The Areva Group

    International Nuclear Information System (INIS)

    This document provides information on the Areva Group, a world nuclear industry leader, offering solutions for nuclear power generation, electricity transmission and distribution and interconnect systems to the telecommunications, computer and automotive markets. It presents successively the front end division including the group business lines involved in producing nuclear fuel for electric power generation (uranium mining, concentration, conversion and enrichment and nuclear fuel fabrication); the reactors and services division which designs and builds PWR, BWR and research reactors; the back end division which encompasses the management of the fuel that has been used in nuclear power plants; the transmission and distribution division which provides products, systems and services to the medium and high voltage energy markets; the connectors division which designs and manufactures electrical, electronic and optical connectors, flexible micro circuitry and interconnection systems. Areva is implemented in Europe, north and south america, africa and asia-pacific. (A.L.B.)

  12. AREVA fatigue concept

    International Nuclear Information System (INIS)

    Modern state-of-the-art fatigue monitoring approaches gain in importance as part of the ageing management of nuclear power plant components. Consequently, lots of operators have to deal with demanding security requirements to ensure the safe operation of power plants. AREVA disposes of a long tradition in the development of fatigue and structural health monitoring solutions. Nuclear power plant applications require the qualified assessment of measured thermo-mechanical loads. The core challenge is the identification and qualified processing of realistic load-time histories. The related methodological requirements will be explained in detail within this contribution. In terms of the nuclear industry, the ageing management of power plant components is nowadays a main issue for all actors: states, regulatory agencies, operators, designers or suppliants. As regards fatigue assessment of nuclear components stringent safety standards imply the consideration of new parameters in the framework of the fatigue analysis process: new design fatigue curves, consideration of environmental fatigue (EAF) parameters and stratification effects. In this general context AREVA developed the integral approach AREVA Fatigue Concept (AFC) with new tools and methods in order to live up to operators’ expectations: Simplified Fatigue Estimation (SFE), Fast Fatigue Evaluation (FFE) and Detailed Fatigue Check (DFC). Based on real measured thermal loads (FAMOSi Local Measurements) and superposed mechanical loads the Fast Fatigue Evaluation (FFE) process allows a highly automated and reliable data processing to evaluate cumulative usage factors of mechanical components. Calculation and management of results are performed within the software frontend FAMOSi, thus impact of operating cycles on components in terms of stress and fatigue usage can be taken into account in order to plan optimized decisions relating to the plant operation or maintenance activities. The paper mainly describes the

  13. Areva, reference document 2006; Areva, document de reference 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This reference document contains information on the AREVA group's objectives, prospects and development strategies, particularly in Chapters 4 and 7. It contains information on the markets, market shares and competitive position of the AREVA group. Content: - 1 Person responsible for the reference document and persons responsible for auditing the financial statements; - 2 Information pertaining to the transaction (Not applicable); - 3 General information on the company and its share capital: Information on AREVA, on share capital and voting rights, Investment certificate trading, Dividends, Organization chart of AREVA group companies, Equity interests, Shareholders' agreements; - 4 Information on company operations, new developments and future prospects: Overview and strategy of the AREVA group, The Nuclear Power and Transmission and Distribution markets, The energy businesses of the AREVA group, Front End division, Reactors and Services division, Back End division, Transmission and Distribution division, Major contracts, The principal sites of the AREVA group, AREVA's customers and suppliers, Sustainable Development and Continuous Improvement, Capital spending programs, Research and development programs, intellectual property and trademarks, Risk and insurance; - 5 Assets - Financial position - Financial performance: Analysis of and comments on the group's financial position and performance, 2006 Human Resources Report, Environmental Report, Consolidated financial statements, Notes to the consolidated financial statements, AREVA SA financial statements, Notes to the corporate financial statements; 6 - Corporate Governance: Composition and functioning of corporate bodies, Executive compensation, Profit-sharing plans, AREVA Values Charter, Annual Combined General Meeting of Shareholders of May 3, 2007; 7 - Recent developments and future prospects: Events subsequent to year-end closing for 2006, Outlook; 8 - Glossary; 9 - Table of concordance.

  14. Areva in Niger

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-02-01

    Niger is the second poorest country in the world but it has natural resources underground in the form of uranium ores deposits. This uranium is currently mined by two companies incorporated under Nigerian law: Somair and Cominak, operated by the principal shareholder Areva (through its subsidiary Cogema). After a presentation of Somair and Cominak key figures, this document details the working conditions and radiological protection, the environmentally friendly operations, the production traceability, the local economic development, the strengthening of the health care system and the development of the infrastructure. (A.L.B.)

  15. Areva in Niger

    International Nuclear Information System (INIS)

    Niger is the second poorest country in the world but it has natural resources underground in the form of uranium ores deposits. This uranium is currently mined by two companies incorporated under Nigerian law: Somair and Cominak, operated by the principal shareholder Areva (through its subsidiary Cogema). After a presentation of Somair and Cominak key figures, this document details the working conditions and radiological protection, the environmentally friendly operations, the production traceability, the local economic development, the strengthening of the health care system and the development of the infrastructure. (A.L.B.)

  16. AREVA annual results 2009

    International Nuclear Information System (INIS)

    AREVA expanded its backlog and increased its revenues compared with 2008, on strong installed base business and dynamic major projects, fostering growth in operating income of 240 million euros. As announced previously, Areva is implementing a financing plan suited to its objectives of profitable growth. The plan was implemented successfully in 2009, including the conclusion of an agreement, under very satisfactory terms, to sell its Transmission and Distribution business for 4 billion euros, asset sales for more than 1.5 billion euros, and successful bond issues of 3 billion euros. The plan will continue in 2010 with a capital increase, the completion of asset disposals and cost reduction and continued operational performance improvement programs. Areva bolstered its Renewable Energies business segment by supplementing its offshore wind power and biomass businesses with the acquisition of Ausra, a California-based leader in concentrated solar power technology. Despite the sale of T and D, Areva is maintaining its financial performance outlook for 2012: 12% average annual revenue growth to 12 billion euros in 2012, double digit operating margin and substantially positive free operating cash flow. Annual results 2009: - For the group as a whole, including Transmission and Distribution: Backlog: euros 49.4 bn (+2.5%), Revenues: euros 14 bn (+6.4%), Operating income: euros 501 m (+20.1%); - Nuclear and Renewable Energies perimeter: Backlog: euros 43.3 bn (+1.8%), Strong revenue growth: +5.4% to euros 8.5 bn, Operating income before provision for the Finnish project in the first half of 2009: euros 647 m, Operating income: euros 97 m, for a euros 240 m increase from 2008; - Net income attributable to equity holders of the parent: euros 552 m, i.e. euros 15.59 per share; - Net debt: euros 6,193 m; - Pro-forma net debt, including net cash to be received from the sale of T and D in 2010: euros 3,022 m; - Dividend of euros 7.06 per share to be proposed during the Annual

  17. Areva reference document 2007; Areva document de reference 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This reference document contains information on the AREVA group's objectives, prospects and development strategies, particularly in Chapters 4 and 7. It contains also information on the markets, market shares and competitive position of the AREVA group. Content: 1 - Person responsible for the reference document and persons responsible for auditing the financial statements; 2 - Information pertaining to the transaction (not applicable); 3 - General information on the company and its share capital: Information on Areva, Information on share capital and voting rights, Investment certificate trading, Dividends, Organization chart of AREVA group companies, Equity interests, Shareholders' agreements; 4 - Information on company operations, new developments and future prospects: Overview and strategy of the AREVA group, The Nuclear Power and Transmission and Distribution markets, The energy businesses of the AREVA group, Front End division, Reactors and Services division, Back End division, Transmission and Distribution division, Major contracts 140 Principal sites of the AREVA group, AREVA's customers and suppliers, Sustainable Development and Continuous Improvement, Capital spending programs, Research and Development programs, Intellectual Property and Trademarks, Risk and insurance; 5 - Assets financial position financial performance: Analysis of and comments on the group's financial position and performance, Human Resources report, Environmental report, Consolidated financial statements 2007, Notes to the consolidated financial statements, Annual financial statements 2007, Notes to the corporate financial statements; 6 - Corporate governance: Composition and functioning of corporate bodies, Executive compensation, Profit-sharing plans, AREVA Values Charter, Annual Ordinary General Meeting of Shareholders of April 17, 2008; 7 - Recent developments and future prospects: Events subsequent to year-end closing for 2007, Outlook; Glossary; table of

  18. Areva 2005 annual report; Areva rapport annuel 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This annual report contains information on AREVA's objectives, prospects and strategies, particularly in Chapters 4 and 7, as well as contains information on the markets, market shares and competitive position of the AREVA group. Content: 1 - Person responsible for the annual report and persons responsible for auditing the financial statements; 2 - Information pertaining to the transaction; 3 - General information on the company and share capital: Information on AREVA, Information on share capital and voting rights, Investment certificate trading, Dividends, Organizational chart of the AREVA group, Equity interests, Shareholders' agreements; 4 - Information on company operations, 5 - New developments and future prospects: Overview and strategy of the AREVA group, The Nuclear Power and Transmission and Distribution markets, AREVA group energy businesses, Front End Division, Reactors and Services Division, Back End Division, Transmission and Distribution Division, Major Contracts, The Group's principal sites, AREVA's customers and suppliers, Human resources, Sustainable Development and Continuous Improvement, Capital spending programs, Research and development, intellectual property and brand name programs, Risk and insurance; 6 - Assets - Financial position - financial performance: Analysis of and comments on the Group's financial position and performance, Human Resources report 2005, Environmental report, Consolidated financial statements, Notes to the consolidated financial statements, AREVA SA Financial statements 2005, Notes to the corporate financial statements; 7 - Corporate governance: Composition and functioning of administrative bodies, Executive compensation, Profit-sharing plans, AREVA Values Charter, Annual General Meeting of Shareholders of May 2, 2006; 8 - Recent developments and outlook: Events subsequent to year-end closing for 2005, Outlook.

  19. AREVA 2010 Reference document

    International Nuclear Information System (INIS)

    After a presentation of the person responsible for this document, and of statutory auditors, this report proposes some selected financial information. Then, it addresses, presents and comments the different risk factors: risk management and coverage, legal risk, industrial and environmental risk, operational risk, risks related to major projects, liquidity and market risk, and other risk. Then, after a presentation of the issuer, it proposes a business overview (markets for nuclear and renewable energies, AREVA customers and suppliers, strategy, activities), a presentation of the organizational structure, a presentation of AREVA properties, plants and equipment (sites, environmental issues), an analysis and comment of the group's financial position and performance, a presentation of its capital resources, an overview of its research and development activities, programs, patents and licenses. It indicates profit forecast and estimates, presents the administrative, management and supervisory bodies, and compensation and benefits amounts, reports of the functioning of corporate bodies. It describes the human resource company policy, indicates the main shareholders and transactions with related parties. It proposes financial information concerning assets, financial positions and financial performance. This document contains its French and its English versions

  20. AREVA - 2013 Reference document

    International Nuclear Information System (INIS)

    This Reference Document contains information on the AREVA group's objectives, prospects and development strategies, as well as estimates of the markets, market shares and competitive position of the AREVA group. Content: 1 - Person responsible for the Reference Document; 2 - Statutory auditors; 3 - Selected financial information; 4 - Description of major risks confronting the company; 5 - Information about the issuer; 6 - Business overview; 7 - Organizational structure; 8 - Property, plant and equipment; 9 - Situation and activities of the company and its subsidiaries; 10 - Capital resources; 11 - Research and development programs, patents and licenses; 12 - Trend information; 13 - Profit forecasts or estimates; 14 - Management and supervisory bodies; 15 - Compensation and benefits; 16 - Functioning of the management and supervisory bodies; 17 - Human resources information; 18 - Principal shareholders; 19 - Transactions with related parties; 20 - Financial information concerning assets, financial positions and financial performance; 21 - Additional information; 22 - Major contracts; 23 - Third party information, statements by experts and declarations of interest; 24 - Documents on display; 25 - Information on holdings; Appendix 1: report of the supervisory board chairman on the preparation and organization of the board's activities and internal control procedures; Appendix 2: statutory auditors' reports; Appendix 3: environmental report; Appendix 4: non-financial reporting methodology and independent third-party report on social, environmental and societal data; Appendix 5: ordinary and extraordinary general shareholders' meeting; Appendix 6: values charter; Appendix 7: table of concordance of the management report; glossaries

  1. AREVA 2010 annual results

    International Nuclear Information System (INIS)

    Areva's 44-billion euro backlog at the end of 2010 gives the group excellent visibility, enabling it to confirm its outlook for 2012: 12 billion euros in revenue, double-digit operating margin and significantly positive free operating cash flow. Revenue rose by 575 million euros in 2010, or 6.7%, in comparison to 2009 and operating income excluding particular items improved by 201 million euros, nearly 2 points of revenue. In the past two years, Areva has raised 7.1 billion euros and secured its liquidity to ensure its development. In 2011, Areva is going to simplify the group's capital structure by listing ordinary shares of AREVA. At that time, the group may launch the employee share-holding plan, something it has ardently sought for several years as a way for its employees to share in AREVA's growth. The consolidated backlog stood at 44.204 billion euros at December 31, 2010, up 2.0% compared with that at December 31, 2009. The group's consolidated revenue came to 9.104 billion euros in 2010, up 6.7% on a reported basis and 5.1% like-for-like compared with 2009. Excluding particular items, operating income rose by 1.9 point, going from 3.9% in 2009 to 5.8% in 2010, giving operating income of 532 million euros (331 million euros in 2009). Net income attributable to equity owners of the parent came to 883 million euros in 2010, an increase of 331 million euros compared with 2009. Operating cash flow before capex was 923 million euros, an increase of 548 million euros compared with 2009, when it was 375 million euros, due to the visible improvement in EBITDA and working capital requirement. The change in gross capex (excluding acquisitions) from 1.780 billion euros in 2009 to 1.966 billion euros in 2010 is due to the ramp-up of construction programs, particularly in Enrichment. In 2010, almost 60% of the group's capital spending was on sites in France. The acquisitions made in Renewable Energies in 2010 in the amount of 210 million euros (100% of Ausra and the

  2. Areva - 2011 Reference document

    International Nuclear Information System (INIS)

    After having indicated the person responsible of this document and the legal account auditors, and provided some financial information, this document gives an overview of the different risk factors existing in the company: law risks, industrial and environmental risks, operational risks, risks related to large projects, market and liquidity risks. Then, after having recalled the history and evolution of the company and the evolution of its investments over the last five years, it proposes an overview of Areva's activities on the markets of nuclear energy and renewable energies, of its clients and suppliers, of its strategy, of the activities of its different departments. Other information are provided: company's flow chart, estate properties (plants, equipment), an analysis of its financial situation, its research and development policy, the present context, profit previsions or estimations, management organization and operation

  3. AREVA: Growing Engineers through Education

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Liz [AREVA Inc, 3315 Old Forest Road, 24501 Lynchburg - Virginia (United States)

    2008-07-01

    The demand for engineers is of global proportions, and the need for engineers at AREVA has never been greater. The availability of qualified resources is of strategic concern to the company as it meets the energy challenges of the 21. century. The nuclear energy company will require up to 800 additional engineers by 2011 to support the growth of the business, especially in the area of new nuclear plants. Competition for college graduates at engineering schools is intense and talented students are moving away from central Virginia to pursue degrees at engineering universities. The cost to recruit new engineers from other areas is increasing. In response to these challenges, AREVA and area businesses, the University of Virginia (U.Va.) and the Central Virginia Community College (CVCC) have formed a partnership to provide undergraduate engineering education at the two-year college in Lynchburg. The program allows students to earn an engineering associate's degree at CVCC and then complete their bachelor of science through U.Va.'s School of Engineering and Applied Science. Students can earn a prestigious engineering degree from U.Va. while still in Lynchburg. Nearly 150 students are in the program, including 50 AREVA employees. Flexible courses are arranged for AREVA employees who work at nuclear power plants during outages. AREVA also sponsors interns who learn on the job in close mentor-ships with engineers while studying engineering. These students have the advantage of getting to know AREVA and can work effectively part time during studies and immediately upon graduation as an engineer. Students with family ties prefer to stay in central Virginia, and the strong bonds they form with AREVA during their studies increase loyalty to the company. AREVA is 'Growing Its Own Engineers' starting in middle and high school and through this unique college program in order to meet tomorrow's demand for resources. (author)

  4. AREVA: Growing Engineers through Education

    International Nuclear Information System (INIS)

    The demand for engineers is of global proportions, and the need for engineers at AREVA has never been greater. The availability of qualified resources is of strategic concern to the company as it meets the energy challenges of the 21. century. The nuclear energy company will require up to 800 additional engineers by 2011 to support the growth of the business, especially in the area of new nuclear plants. Competition for college graduates at engineering schools is intense and talented students are moving away from central Virginia to pursue degrees at engineering universities. The cost to recruit new engineers from other areas is increasing. In response to these challenges, AREVA and area businesses, the University of Virginia (U.Va.) and the Central Virginia Community College (CVCC) have formed a partnership to provide undergraduate engineering education at the two-year college in Lynchburg. The program allows students to earn an engineering associate's degree at CVCC and then complete their bachelor of science through U.Va.'s School of Engineering and Applied Science. Students can earn a prestigious engineering degree from U.Va. while still in Lynchburg. Nearly 150 students are in the program, including 50 AREVA employees. Flexible courses are arranged for AREVA employees who work at nuclear power plants during outages. AREVA also sponsors interns who learn on the job in close mentor-ships with engineers while studying engineering. These students have the advantage of getting to know AREVA and can work effectively part time during studies and immediately upon graduation as an engineer. Students with family ties prefer to stay in central Virginia, and the strong bonds they form with AREVA during their studies increase loyalty to the company. AREVA is 'Growing Its Own Engineers' starting in middle and high school and through this unique college program in order to meet tomorrow's demand for resources. (author)

  5. Report transparency and nuclear safety 2007 CEA Cadarache

    International Nuclear Information System (INIS)

    This report presents the activities of the CEA Center of Cadarache for the year 2007. The actions concerning the safety, the radiation protection, the significant events, the release control and the environmental impacts and the wastes stored on the center are discussed. More especially the report discusses the beginning of the RJH reactor construction, the fourth generation reactors research programs, the implementing of la Rotonde the new radioactive wastes management installation, the renovation of the LECA. (A.L.B.)

  6. Areva - 2011 Annual results; Areva - Resultats annuels 2011

    Energy Technology Data Exchange (ETDEWEB)

    Marie, Patricia; Briand, Pauline; Michaut, Maxime; Scorbiac, Marie de; Repaire, Philippine du

    2012-03-01

    Areva's backlog established at 45.6 billion euros at the end of 2011, significantly increasing at the end of a year marked by the Fukushima accident, confirms the commercial dynamism of the group alongside its customers and reinforces the visibility on its future business level. In a difficult context, the slight decline in revenue in 2011 demonstrates the robustness of Areva's integrated model, resting mainly on recurring business generated in relation to Areva's customers' nuclear installed base, and benefiting from the development of Areva's renewable energies operations. Free operating cash flow before tax, although down over the whole year in 2011, improved in the second half, showing the first effects of Areva's stronger focus on cash generation and debt management. After the success of Areva's bond issue in September 2011, the Group's liquidity remains high at the end of 2011. The Areva teams are now dedicating all of their efforts to the deployment of the 'Action 2016' strategic action plan, which had already yielded its first positive results at the end of 2011, with an improvement in the cost structure of Areva's operations, an increase in order intake, and the launch of several disposals of minority interests. Summary of the 2011 financial results: - Backlog: euro 45.6 bn, +3.1% vs. 2010, i.e +6.7% over 3 months; - Revenue: euro 8.872 bn, i.e -2.6% vs. 2010; - Operating income: - euro 1.923 bn; - Net income attributable to equity owners of the parent: - euro 2.424 bn; - EBITDA: euro 1.068 bn ( euro 420 m excluding Siemens impact); - Free operating cash flow before tax: - euro 2.397 bn (- euro 1.366 bn excluding Siemens impacts), improvement over the second half; - Decrease in net debt of euro 124 m for the year; - Significant drop in general and administrative expenses, with a noticeable reduction between the first and the second half; - Launch of several disposals of minority interests

  7. AREVA in Mongolia - Press kit

    International Nuclear Information System (INIS)

    Mongolia is going through a crucial period in its history and setting up a strategic policy for uranium. The choices that are being made will affect the country and its future. Mongolia, since the mid-2000's, has benefited from significant mining development that has nourished the strong growth of the country. The giant Oyu Tolgoi (gold and copper) and Tavan Tolgoi (coal) deposits are the symbols of this mining potential. Uranium in particular has a major strategic role. The exploration programmes have revealed the presence of exploitable resources. On 26 February 2013, the Professional Council of Mineral Resources with the Ministry of Mines officially classified the Zoovch Ovoo deposit's with more than 50 000 tons of uranium. Following classification of the deposit of Dulaan Uul in 2011, the Zoovch Ovoo classification makes Mongolia officially one of the top 10 countries with the largest uranium resources. Mongolia has set about making the uranium industry a centrepiece of its strategy and its policy of independence. This new approach is founded in the Nuclear Energy Act adopted in the summer of 2009. The Mongolian State wants to create a uranium industry that makes Mongolia a nuclear fuel supplier for the Asian market. The choice of partners with whom the country associates to mine the uranium deposits is therefore important. Agreements have notably entered into with France, through AREVA which is a public company, as well as with Russia, China, Japan and India. AREVA has been present in Mongolia since 1997. AREVA is today represented in Mongolia by AREVA Mongol, its 100% subsidiary. AREVA Mongol carries out its exploration activities through Cogegobi and will manage its mining licences through AREVA Mines LLC. AREVA holds several exploration licences in Mongolia covering over 9,000 km2 in the provinces of Dornogobi and Sukbaatar, where COGEGOBI is conducting its drilling programmes. This first phase has led to the first project-development steps (hydrogeological

  8. The 2003 essential. AREVA; L'essentiel 2003. AREVA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This document presents the essential activities of the Areva Group, a world nuclear industry leader. This group proposes technological solutions to produce the nuclear energy and to transport the electric power. It develops connection systems for the telecommunication, the computers and the automotive industry. Key data on the program management, the sustainable development activities and the different divisions are provided. (A.L.B.)

  9. Areva - 2008 results: yet another year of growth for AREVA

    International Nuclear Information System (INIS)

    This paper summarizes the 2008 financial results of the Areva group: Backlog: 48.2 billion euros, up 21.1%; Revenue: 13.2 billion euros, up 10.4%; Operating income: - Operating income excluding provision on OL3 contract in Finland: 1,166 million euros, i.e. operating margin of 8.9%; - Additional provision on OL3 contract of 749 million euros; - Operating income: 417 million euros, i.e. operating margin of 3.2%. Net income attributable to equity holders of the parent: 589 million euros, i.e. euros 16.62 per share; Net debt of 3.45 billion euros before recognition of the SIEMENS put; Dividend of euros 7.05 to be proposed during the Annual General Meeting of Shareholders of April 30, 2009. After publication of these figures Siemens announced its decision to withdraw from AREVA NP

  10. Areva - 2008 results: yet another year of growth for AREVA; Areva - Resultats 2008: une nouvelle annee de croissance pour AREVA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-02-15

    This paper summarizes the 2008 financial results of the Areva group: Backlog: 48.2 billion euros, up 21.1%; Revenue: 13.2 billion euros, up 10.4%; Operating income: - Operating income excluding provision on OL3 contract in Finland: 1,166 million euros, i.e. operating margin of 8.9%; - Additional provision on OL3 contract of 749 million euros; - Operating income: 417 million euros, i.e. operating margin of 3.2%. Net income attributable to equity holders of the parent: 589 million euros, i.e. euros 16.62 per share; Net debt of 3.45 billion euros before recognition of the SIEMENS put; Dividend of euros 7.05 to be proposed during the Annual General Meeting of Shareholders of April 30, 2009. After publication of these figures Siemens announced its decision to withdraw from AREVA NP.

  11. Report on transparency and nuclear safety 2014 - Cadarache CEA centre

    International Nuclear Information System (INIS)

    This document proposes, first, a presentation of the Cadarache CEA centre, of its activities and installations, gives a rather detailed overview of measures related to safety and to radiation protection within these activities and installations. Then it reports significant events related to safety and to radiation protection which occurred in 2014 and have been declared to the ASN. Next, it discusses the results of release measurements (liquid and gaseous effluents, radiological assessment, and chemical assessment for various installations) and the control of the chemical and radiological impact of these gaseous and liquid effluents on the environment. Finally, it addresses the issue of radioactive wastes which are stored in the different nuclear base installations of the Centre, indicates the different measures aimed at limiting the volume of these warehoused wastes and addresses their impact on health and on the environment. Nature and quantities of warehoused wastes are specified. Remarks and recommendations of the CHSCT are given

  12. Processing of radioactive effluents in Cadarache research centre

    International Nuclear Information System (INIS)

    French Atomic Energy Commission (Commissariat a l'Energie Atomique - CEA) is studying the design of a new plant for processing liquid aqueous radioactive effluents produced on Cadarache Research Centre. Effluents to be processed are low and medium activity effluents, with, for some of them, important concentrations of actinides, and which lead to the production of A and B category solid wastes, according to the French legislation, and suitable for final disposal. The objectives in terms of minimization of discharge's activity level and solid waste production have guided a selection of processes and their arrangement, in order to optimise decontamination and volume concentration factors. Seeded-ultrafiltration and vitrification with cold crucible melter are part of the selected processes for which developments are in progress in CEA for application to the characteristics of the project. (authors)

  13. Areva at September 30, 2015:

    International Nuclear Information System (INIS)

    After the phase of strategic choices and definition of competitiveness objectives, AREVA entered the phase of operational execution of its transformation plan. Despite a still depressed market environment, the Group is beginning to measure the first results of its efforts to restore its financial situation. Thanks to the actions undertaken, the cash consumption pace was sharply slowed down compared to what had been anticipated. In summary: Rise in revenue to euro 2.947 bn: +10.3% vs. September 2014 (+8.7% like for like); - Backlog of euro 31.595 bn; - Discontinued operations, including AREVA NP: - Revenue of euro 2.732 bn: -7.5% vs. September 2014, - Backlog of euro 12.872 bn. Progress on the transformation plan in the third quarter: - Social dialogue: signature of the group agreement on the employment plan and submittal of documents describing the group's reorganization plans to employee representation bodies as part of a job-saving plan; - Continued deployment of actions for operational performance; - Strategic partnership with EDF: finalization of due diligence for the sale of AREVA NP; - Decisions on capital increase taken before the end of 2015

  14. Sharing Experiences within AREVA D and D Project Portfolio: Four Illustrations - 13049

    Energy Technology Data Exchange (ETDEWEB)

    Chabeuf, Jean-Michel; Varet, Thierry [AREVA Site Value Development Business Unit, La Hague Site (France); AREVA Site Value Development Business Unit, La Hague Site

    2013-07-01

    Over the past ten years, AREVA has performed D and D operations on a wide range of nuclear sites, such as Marcoule and La Hague recycling plants, to Cadarache MOX fuel fabrication plant or Veurey and Annecy metallic Uranium machining plants. Each site is different from the other but some lessons can be shared through this D and D portfolio. In that respect, knowledge management is one of AREVA D and D Technical Department main missions. Four illustrations demonstrate the interest of knowledge share. Waste management is one of the key activities in D and D; It requires a specific characterization methodology, adapted logistics, and optimized waste channels, all of which have been developed over the years by AREVA teams on the site of Marcoule while they are rather new to La Hague, whose main activity remains fuel reprocessing despite the launch of UP2 400 D and D program. The transfer of know how has thus been organized over the past two years. Plasma cutting has been used extensively in Marcoule for years, while prohibited on the site of La Hague following questions raised about the risks associated wit Ruthenium sublimation. La Hague Technical Department has thus developed an experimental protocol to quantify and contain the Ruthenium risk, the result of which will then be applied to Marcoule where the Ruthenium issue has appeared in recent operations. Commissioning and operating fission products evaporators is a rather standard activity on UP2 800 and UP3, while the associated experience has been decreasing in Marcoule following final shutdown in 1998. When the French atomic Energy commission decided to build and operate a new evaporator to concentrate rinsing effluents prior to vitrification in 2009, AREVA La Hague operators were mobilized to test and commission the new equipment, and train local operators. Concrete scabbling is the final stage prior to the free release of a nuclear facility. In the context of Veurey and Annecy final cleanup and declassification

  15. Annual report 2001. A (AREVA) for.

    International Nuclear Information System (INIS)

    This annual report 2001, on the group Areva, provides data and information on the Areva emerges, overview of operations, sustainable development policy, research and development programs, nuclear power activities (front-end, reactors and services back-end divisions), components (connectors division and STMicroelectronics, human resources, share data and the financial report. (A.L.B.)

  16. Reference document 2001. A (AREVA) for.

    International Nuclear Information System (INIS)

    This reference document 2001, on the group Areva, provides data and information on the Areva emerges, overview of operations, sustainable development policy, research and development programs, nuclear power activities (front-end, reactors and services back-end divisions), components (connectors division and STMicroelectronics, human resources, share data and financial information (financial report 2001, financial report first-half 2002). (A.L.B.)

  17. Areva. 2005 half year report; Areva. Rapport semestriel 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    With manufacturing facilities in over 40 countries and a sales network in over 100, AREVA offers customers technological solutions for nuclear power generation and electricity transmission and distribution. The group also provides interconnect systems to the telecommunications, computer and automotive markets. This half-year report of Areva group presents the key financial data of the group for the first half of 2005: 1 - Highlights of the period; 2 - Transition to the International Financial Reporting Standards: Group's application of IFRS, Impact of IAS 32 and 39 adoption on the Group's financial statements; 3 - Key data: summary data, summary data by business Division, backlog, income statement, review by business Division, cash flow statement, balance sheet items; 4 - events subsequent to the half-year-end; 5 - consolidated financial statements: statutory Auditors' report on the 2005 half-year financial statements - period from January 1 to June 30, 2005, consolidated income statement, consolidated balance sheet, consolidated cash flow statement, change in consolidated shareholders' equity, data by business Division and region, notes to the consolidated financial statements; 6 - Outlook.

  18. Areva. 2005 half year report

    International Nuclear Information System (INIS)

    With manufacturing facilities in over 40 countries and a sales network in over 100, AREVA offers customers technological solutions for nuclear power generation and electricity transmission and distribution. The group also provides interconnect systems to the telecommunications, computer and automotive markets. This half-year report of Areva group presents the key financial data of the group for the first half of 2005: 1 - Highlights of the period; 2 - Transition to the International Financial Reporting Standards: Group's application of IFRS, Impact of IAS 32 and 39 adoption on the Group's financial statements; 3 - Key data: summary data, summary data by business Division, backlog, income statement, review by business Division, cash flow statement, balance sheet items; 4 - events subsequent to the half-year-end; 5 - consolidated financial statements: statutory Auditors' report on the 2005 half-year financial statements - period from January 1 to June 30, 2005, consolidated income statement, consolidated balance sheet, consolidated cash flow statement, change in consolidated shareholders' equity, data by business Division and region, notes to the consolidated financial statements; 6 - Outlook

  19. AREVA 2010 annual results; AREVA resultats annuels 2010

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-07-01

    Areva's 44-billion euro backlog at the end of 2010 gives the group excellent visibility, enabling it to confirm its outlook for 2012: 12 billion euros in revenue, double-digit operating margin and significantly positive free operating cash flow. Revenue rose by 575 million euros in 2010, or 6.7%, in comparison to 2009 and operating income excluding particular items improved by 201 million euros, nearly 2 points of revenue. In the past two years, Areva has raised 7.1 billion euros and secured its liquidity to ensure its development. In 2011, Areva is going to simplify the group's capital structure by listing ordinary shares of AREVA. At that time, the group may launch the employee share-holding plan, something it has ardently sought for several years as a way for its employees to share in AREVA's growth. The consolidated backlog stood at 44.204 billion euros at December 31, 2010, up 2.0% compared with that at December 31, 2009. The group's consolidated revenue came to 9.104 billion euros in 2010, up 6.7% on a reported basis and 5.1% like-for-like compared with 2009. Excluding particular items, operating income rose by 1.9 point, going from 3.9% in 2009 to 5.8% in 2010, giving operating income of 532 million euros (331 million euros in 2009). Net income attributable to equity owners of the parent came to 883 million euros in 2010, an increase of 331 million euros compared with 2009. Operating cash flow before capex was 923 million euros, an increase of 548 million euros compared with 2009, when it was 375 million euros, due to the visible improvement in EBITDA and working capital requirement. The change in gross capex (excluding acquisitions) from 1.780 billion euros in 2009 to 1.966 billion euros in 2010 is due to the ramp-up of construction programs, particularly in Enrichment. In 2010, almost 60% of the group's capital spending was on sites in France. The acquisitions made in Renewable Energies in 2010 in the amount of 210 million euros

  20. Areva at March 31, 2016

    International Nuclear Information System (INIS)

    In the first quarter of 2016, AREVA generated consolidated revenue of 826 million euros, a decrease of 0.8% (-2.2% like for like) compared with the same period in 2015, due in particular to the schedule of uranium deliveries. Foreign exchange had a positive impact of 12 million euros over the period. At March 31, 2016, the group's backlog reached 33.6 billion euros, up sharply compared to December 31, 2015 (29 billion euros), and represented eight years of revenue. It reflects in particular multi-year commercial agreements signed with EDF in early 2016. The order intake for the first quarter of 2016 totaled 6.1 billion euros, a strong increase in relation to the first quarter of 2015 (0.3 billion euros)

  1. AREVA and sustainable development - 2003 report

    International Nuclear Information System (INIS)

    The first report helped establish the status of Areva entities sustainable development performance and identify areas for improvement. This second report will report on the continuous improvement process, including accomplishments and projects initiated as well as difficulties encountered and ground yet to be covered. It includes, the Areva role in key sustainable development issues, the commitments and the governance, the risk management, the economic responsibility, the social responsibility and the environmental responsibility. (A.L.B.)

  2. Report on responsible growth. AREVA in 2008

    International Nuclear Information System (INIS)

    All over the world, AREVA supplies its customers with solutions for carbon-free power generation and electricity transmission and distribution. With its knowledge and expertise in these fields, the group has a leading role to play in meeting the world's energy needs. Ranked first in the global nuclear power industry, AREVA's unique integrated offering covers every stage of the fuel cycle, reactor design and construction, and related services. In addition, the group is expanding its operations in renewable energies. AREVA is also a world leader in electricity transmission and distribution and offers its customers a complete range of solutions for greater grid stability and energy efficiency. Sustainable development is a core component of the group's industrial strategy. Its 75,000 employees work every day to make AREVA a responsible industrial player that is helping to supply ever cleaner, safer and more economical energy to the greatest number of people. Sustainable development is a keystone of AREVA's industrial strategy for achieving growth that is profitable, socially responsible and respectful of the environment. To translate this choice into reality, AREVA integrates sustainable development into its management practices via a continuous improvement initiative revolving around ten commitments: customer satisfaction, financial performance, governance, community involvement, environmental protection, innovation, continuous improvement, commitment to employees, risk management and prevention, dialogue and consensus building. This document is Areva's 2008 report on responsible growth. After the Messages from the Chairman of the Supervisory Board and from the Chief Executive Officer, the report presents the Key data and Highlights of the period, the Corporate governance, the Organization of the group, the Share information and shareholder relations, the uranium reserves, the growing energy demand and the World's population demographic growth, Areva's actions to

  3. Annual report 2001. A (AREVA) for..; Rapport annuel 2001. A (AREVA) comme..

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This annual report 2001, on the group Areva, provides data and information on the Areva emerges, overview of operations, sustainable development policy, research and development programs, nuclear power activities (front-end, reactors and services back-end divisions), components (connectors division and STMicroelectronics, human resources, share data and the financial report. (A.L.B.)

  4. Reference document 2001. A (AREVA) for..; Document de reference 2001. A (AREVA) comme..

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This reference document 2001, on the group Areva, provides data and information on the Areva emerges, overview of operations, sustainable development policy, research and development programs, nuclear power activities (front-end, reactors and services back-end divisions), components (connectors division and STMicroelectronics, human resources, share data and financial information (financial report 2001, financial report first-half 2002). (A.L.B.)

  5. Fuel Services Germany - AREVA NP

    Energy Technology Data Exchange (ETDEWEB)

    Langenberger, Jan; Seidel, Jana [AREVA, AREVA NP, P.O Box 11 09, 91001 Erlangen (Germany)

    2008-07-01

    AREVA NP has over 30 years of nuclear fuel inspection and repair experience. Our service staff is trained regularly and holds a long lasting experience in their field of work. Our services comprise all activities within examinations of lead test assemblies, all necessary inspections and tests of fuel assemblies and other core components during an outage, reconstitution of fuel assemblies for further use in the reactor and activities within the disposal of fuel assemblies and core components. Furthermore we deliver facilities and systems that are necessary for the above mentioned services. These are in particular facilities for inspections, sipping, repair and for disposal (e.g. conditioning equipment, facility for encapsulation of leaking fuel rods). Continuous research and development guarantee that the applied facilities always comply with the latest state of the art. They are suitable for a variety of fuel assembly designs of AREVA's and external supplier's latest and conventional technology. The facilities are applicable in different BWR-, PWR and VVER nuclear power plants. Inspections in PWR- and BWR Plants: - Measurements with contact and contact less measuring methods of fuel assemblies, fuel rods, fuel channels and other core components; - High-definition video inspections; - Mast-, In-core- and Box-sipping to detect defective fuel assemblies; - Support (e.g. measurements on site) for post irradiation examinations; - Sampling of material (e.g. taking CRUD or material probes) and fuel rod preparation for hot cell examination. Repair in PWR- and BWR Plants: - Exchange of defective fuel rods of a fuel assembly for further use in the reactor and preparation of the fuel assembly or defective fuel rod for disposal; - Reconstitution of fuel assemblies with damaged structure parts (spacer, springs, upper-and lower end fitting). We offer products that meet the requirements of pressure-tightness under water (e. g. for use in the fuel storage pool), that are

  6. Seismic risk and safety of nuclear installations. A look at the Cadarache Centre; Risque sismique et surete des installations nucleaires. Regards sur le Centre de Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    Verrhiest-Leblanc, G.; Chevallier, A. [Autorite de Surete Nucleaire 75 - Paris (France)

    2010-11-15

    After a brief recall of some important seismic events which occurred in the past in the south-eastern part of France, the authors indicate the nuclear installations present in this region. They outline the difference between requirements for a usual building and for basic nuclear installations. They indicate laws and regulations which are to be applied to these installations like to any hazardous industrial installation. They describe the seismic risk as it has been determined for the Cadarache area, and evoke the para-seismic design of new nuclear installations which are to be built in Cadarache and actions for a para-seismic reinforcement of existing constructions. Finally, they evoke organisational aspects (emergency plans) and the approach for a better information and transparency about the seismic risk

  7. Areva will work the Imouraren mine

    International Nuclear Information System (INIS)

    Areva has signed an agreement with the government of Niger about the exploitation of the Imouraren uranium mine. The agreement settles a capital share of 66.65% for Areva and 33.35% for the Niger state. The production is assessed to be 5000 tonnes a year for 35 years and about 1400 jobs will be created. The initial investment amounts to 1.2 milliard euros and the production will begin in 2012. The Imouraren mine will enable Niger to double its present uranium production and to rank second worldwide as an uranium producer. Areva has been operating 2 mines in Niger for 40 years, one located at Arlit, the other one at Akokan, the 2 mines production reached 2260 tonnes of uranium in 2006. (A.C.)

  8. Areva. Half-year 2015 results

    International Nuclear Information System (INIS)

    This document presents the financial statements of Areva Group for the period ended June 30, 2015. During the first half, AREVA made determining decisions in refocusing on its core business, the nuclear fuel cycle direction. The group has announced an ambitious competitiveness plan, is engaged in strong social dialogue with its social partners, and has worked to improve the management of its large projects, which up to now have weighed heavily on its financial trajectory. It pursued its strategic roadmap for its refocusing and the redefinition of the partnership with EDF. The agreements found with EDF represent very significant progress. The group also worked on its financing plan whose aim is to allow AREVA to refinance its mid-term needs on the markets. Content: Key figures, Highlights of the period, Transformation plan (Performance plan, Strategic roadmap, Financing plan, Financial outlook)

  9. Complementary safety assessment assessment of nuclear facilities - Tricastin facility - AREVA

    International Nuclear Information System (INIS)

    This complementary safety assessment analyses the robustness of the Areva part of the Tricastin nuclear site to extreme situations such as those that led to the Fukushima accident. This study includes the following facilities: Areva NC Pierrelatte, EURODIF production, Comurhex Pierrelatte, Georges Besse II plant and Socatri. Robustness is the ability for the plant to withstand events beyond which the plant was designed. Robustness is linked to safety margins but also to the situations leading to a sudden deterioration of the accidental sequence. Moreover, safety is not only a matter of design or engineered systems but also a matter of organizing: task organization (including subcontracting) as well as the setting of emergency plans or the inventory of nuclear materials are taken into consideration in this assessment. This report is divided into 10 main chapters: 1) the feedback experience of the Fukushima accident; 2) description of the site and its surroundings; 3) featuring of the site's activities and installations; 4) accidental sequences; 5) protection from earthquakes; 6) protection from floods; 7) protection from other extreme natural disasters; 8) the loss of electrical power and of the heat sink; 9) the management of severe accidents; and 10) subcontracting policy. This analysis has identified 5 main measures to be taken to limit the risks linked to natural disasters: -) continuing the program for replacing the current conversion plant and the enrichment plant; -) renewing the storage of hydrofluoric acid at the de-fluorination workshop; -) assessing the seismic behaviour of some parts of the de-fluorination workshop and of the fluorine fabrication workshop; -) improving the availability of warning and information means in case of emergency; and -) improving the means to mitigate accidental gaseous releases. (A.C.)

  10. AREVA and sustainable development - 2003 report; Rapport developpement durable 2003 - AREVA

    Energy Technology Data Exchange (ETDEWEB)

    Lauvergeon, A

    2003-07-01

    The first report helped establish the status of Areva entities sustainable development performance and identify areas for improvement. This second report will report on the continuous improvement process, including accomplishments and projects initiated as well as difficulties encountered and ground yet to be covered. It includes, the Areva role in key sustainable development issues, the commitments and the governance, the risk management, the economic responsibility, the social responsibility and the environmental responsibility. (A.L.B.)

  11. Areva group. Result, first half 2004

    International Nuclear Information System (INIS)

    Areva, a world nuclear industry leader, provides by this document information and key data on the performance and detailed financial data of the first half 2004. The transmission and distribution integration plan 2004-2006 is also detailed. (A.L.B.)

  12. AREVA net income: 649 million euros

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-03-15

    This document presents the financial statements for 2006 of Areva group: net income: 649 million euros; backlog up by 24.6% to 25.6 billion euros; steady growth of sales revenue: + 7.3%1 to 10.863 billion euros; operating income of 407 million euros: excellent divisional performance and constitution of a significant provision for the OL3 project in Finland; dividend proposed to Annual General Meeting of Shareholders: 8.46 euros per share.

  13. Export Control in the AREVA Group

    International Nuclear Information System (INIS)

    After the Second World War the nuclear technology was mostly considered inappropriate for the export. It remains strictly regulated today, but the development of the civil applications urged states to facilitate the peaceful uses while establishing a strict control in the domains of the internal security and the nuclear proliferation. AREVA decided to set up an Export Control program applied to all the products and in all the countries where the group operates. AREVA can export products or make transfer of technology considered as sensitive for the non-proliferation and the risks linked to the terrorism. This sensitiveness results from the nature of the products or from the country of destination and in certain cases both of them. AREVA has set up an Export Control program and an interactive e-learning training within the Group to make exports of sensitive products, raw materials and technologies more secure. The subject is rather complex, the regulations are constantly evolving, and becoming familiar with them is necessarily a gradual process, but it must be made in-depth, hence the idea of regular training sessions. The implementation of the Export Control in the AREVA Group declines in four fundamental stages: -) Policy and procedure; -) Appointment of Export Control Officers (ECO); -) Training; and -) Audit and Self Assessment. The training program is composed by the following elements: Ethics (Value Charter) of the Group, Non-proliferation, international regulations and more particularly those that are applicable in Europe (Germany and France) and in the United States. Particular attention is devoted to the Export Control practice in China, Japan and India. (A.C.)

  14. AREVA net income: 649 million euros

    International Nuclear Information System (INIS)

    This document presents the financial statements for 2006 of Areva group: net income: 649 million euros; backlog up by 24.6% to 25.6 billion euros; steady growth of sales revenue: + 7.3%1 to 10.863 billion euros; operating income of 407 million euros: excellent divisional performance and constitution of a significant provision for the OL3 project in Finland; dividend proposed to Annual General Meeting of Shareholders: 8.46 euros per share

  15. Areva in 2007, growth and profitability

    International Nuclear Information System (INIS)

    This annual report 2007, presents the AREVA Group activities during the year. It contents the messages of the Chairman and Chief executive officer, the solutions offered by the group for CO2 free power generation and reliable electricity transmission and distribution, the governance, the financial performance, the innovation, the environmental protection, the risk management and prevention, the audit's report and key data for the year 2007. (A.L.B.)

  16. Areva - 2012 Annual Report. Forward looking energy

    International Nuclear Information System (INIS)

    After an interview of the Chief Executive Officer, a presentation of the company's governance and organization, and a brief overview of its strategy (with its five pillars: safety and security, operation and customers, economic competitiveness, technology and innovation, people), this report indicates and presents the various projects across the world. It outlines the main activities and objectives: preservation of nuclear and occupational safety, service to customer over the long term, fuel supply security, expertise, sustainability of nuclear power, contribution to the energy mix of tomorrow. It outlines the belief of Areva in the future of nuclear and renewable energies (brief presentations of activities and examples in different countries and in different domains), describes how Areva offers comprehensive solutions for power generation with less carbon, and indicates the distribution of revenues by business group and by geographic area. It comments a year of mining operations, the activities concerning the front end of the fuel cycle, those related to reactors and nuclear services, to recycling (fuel recycling, site dismantling and reuse, material storage and disposal), to the booming business of renewable energies, to engineering services. The report proposes some key figures concerning greenhouse gas emissions, environmental footprint, occupational safety, and radiation protection within the group. It outlines the importance of innovation in terms of investment, personnel and patents. It comments the activities related to nuclear safety and to the control of the environment. It outlines the human resource policy, evokes the activity of the Areva foundation. A summarized presentation of financial statements is given

  17. Areva group. Result, first half 2004; Resultats du 1. semestre 2004. Groupe Areva

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-09-01

    Areva, a world nuclear industry leader, provides by this document information and key data on the performance and detailed financial data of the first half 2004. The transmission and distribution integration plan 2004-2006 is also detailed. (A.L.B.)

  18. 1. half results 2003 - AREVA group; Resultats du 1. semestre 2003 - groupe AREVA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-10-01

    This financial presentation of the Areva group, the world nuclear industry leader, results for the first half 2003 highlights the good level of activity, the negotiations with URENCO in final stages concerning the enrichment, the revision of estimates and negotiations underway concerning the dismantling and the operating income positive in Q2 2003 concerning the connectors division. (A.L.B.)

  19. Areva - Press release from the Supervisory Board

    International Nuclear Information System (INIS)

    During its meeting held on December 12, 2011, devoted in particular to the examination of the 2011 closing estimates, the AREVA Executive Board indicated that it expected to book a provision of 1.46 billion euros (2.025 billion US dollars) in the company's accounts for fiscal year 2011 for impairment of assets for the reporting entity UraMin, a mining company acquired by AREVA in 2007, which, given the provision booked in 2010 (426 million euros), brings the value of these assets on the AREVA balance sheet down to 410 million euros. Given the size of these provisions, the Supervisory Board decided to make three of its members, meeting as an ad hoc committee, in charge of analyzing the terms of acquisition of this company, as well as the key decisions made in this reporting entity up to 2011 and, based on the outcome of these analyses, to recommend to it any appropriate measures in AREVA's interest. This committee reported on its work during the Supervisory Board meeting held on February 14, 2012. In light of this report, the Supervisory Board found that the fairness and reliability of the financial statements of previous years were not in question. Nevertheless, considering the malfunctions raised, the Board considers it appropriate to thoroughly review AREVA's governance in order to ensure that decisions concerning large acquisitions or investments be reviewed and validated in the future under conditions ensuring better legal and financial security and enabling a more transparent dialogue between management and the Supervisory Board. It thus asked the Executive Board to recommend, at the next General Meeting of Shareholders, that the by-laws of the company be modified to make the Supervisory Board's prior approval of investments, stake acquisitions and acquisitions mandatory above a threshold of 20 million euros. It also decided to set up a business ethics committee within the Supervisory Board responsible for ensuring that rules of conduct are properly applied

  20. Areva in China - Press kit April 2013

    International Nuclear Information System (INIS)

    increasingly key market for the AREVA Group. AREVA, which is focused on and committed to both nuclear and renewable energies, supports the Chinese utilities to reach the ambitious targets set by their government. This document summarizes the present activities of Areva in China: 1 - More than 30 years of cooperation with China: Key Dates; AREVA Group in China and partnerships with the Chinese Nuclear Industry; 2 - Chinese energy and policies: Economy and Energy in China, Nuclear energy in China, Overview of the Chinese nuclear fleet, Renewable energies in China; 3 - Activities in China: Mining, Front-End, Reactors and Services, Back-End, Renewable Energies; 4 - Taishan 1 and 2 EPRTM project: General Description, Scope of AREVA, AREVA Supply Chain, Key Milestones, Progress of Taishan 1 and 2, at the end of 2012

  1. Areva as of December 31, 2011

    International Nuclear Information System (INIS)

    In 2011, AREVA's consolidated revenue came to 8.872 billion euros, down slightly (-2.6%) compared with 2010 (-1.2% like for like). The decrease in revenue in nuclear operations was partially offset by significant growth in the renewable energies business. Foreign exchange and changes in the scope of consolidation had respectively a negative impact of 113 million euros and 16 million euros over the period. Revenue totaled 2.922 billion euros in the fourth quarter of 2011, stable compared with the fourth quarter of 2010 (-0.5% on a reported basis and -0.5% like for like). Foreign exchange had a negligible impact during the period. Led by nuclear operations, the group's backlog was 45.6 billion euros at December 31, 2011, up 3.1% year on year and 6.7% in relation to September 30, 2011. Order cancellations since Fukushima were limited to 464 million euros as of December 31, 2011. In accordance with the requirements of IFRS 8, AREVA's business segment information is presented for each operating Business Group (BG), which is the level of information examined by the group's governance bodies. Subsequent to the establishment of a subsidiary combining all of the group's mining operations, data for the Mining Business Group are now reported separately from those of the Front End Business Group. Data used for comparisons with 2010 were restated to reflect this new organization. The business segment information therefore corresponds to AREVA's five operating Business Groups: Mining, Front End, Reactors and Services, Back End and Renewable Energies

  2. AREVA and sustainable development. 2002 report

    International Nuclear Information System (INIS)

    The performance indicators in this report reflect the major sustainable development impacts and challenges that Areva is facing as a group due to the very nature of its operations. They chose the calendar year as reporting period, from January 1 to December 31. This report covers all of the group operations in France and abroad. This report presents an overview of the major financial, social and environmental challenges facing the group. This report is a companion document to the annual activity report. (A.L.B.)

  3. AREVA Business and Strategy overview April, 2010

    International Nuclear Information System (INIS)

    This document is a series of slides presenting AREVA's activities in the framework of CO2-free power generation: 2005-2009 Group Performance; 2010-2012 Development Plan (Build 1/3 of the new nuclear generating capacity, Secure the fuel cycle for current and future customers, Expand renewable energies offering, Ensure strong profitable growth in the T and D Division); Performances and objectives by division (Front-End, Mines and Enrichment, Reactors and Service, renewable energies, Back-End); latest key financial results; Appendices (Financial, Nuclear power, Mining business details, Conversion/Enrichment/Fuel business details, Reactors and Services business details, Back-End business details, Renewable business details)

  4. AREVA Technical Days (ATD) session 1: Energy outlook and presentation of the Areva Group; AREVA Technical Days (ATD) session 1: enjeux energetiques et presentation du groupe AREVA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This first session deals with energy challenges and nuclear, public acceptance of nuclear power, mining activities, chemistry activities, enrichment activities, fuel assembly, reactors and services activities, nuclear measurements activities, reprocessing and recycling activities, logistics activities and connectors activities. (A.L.B.)

  5. Influence of high permeability disks in an axisymmetric model of the Cadarache dynamo experiment

    CERN Document Server

    Giesecke, A; Stefani, F; Gerbeth, G; Léorat, J; Herreman, W; Luddens, F; Guermond, J -L

    2011-01-01

    Numerical simulations of the kinematic induction equation are performed on a model configuration of the Cadarache von-K\\'arm\\'an-Sodium dynamo experiment. The effect of a localized axisymmetric distribution of relative permeability {\\mu} that represents soft iron material within the conducting fluid flow is investigated. The critical magnetic Reynolds number Rm^c for dynamo action of the first non-axisymmetric mode roughly scales like Rm^c({\\mu})-Rm^c({\\mu}->infinity) ~ {\\mu}^(-1/2) i.e. the threshold decreases as {\\mu} increases. This scaling law suggests a skin effect mechanism in the soft iron disks. More important with regard to the Cadarache dynamo experiment, we observe a purely toroidal axisymmetric mode localized in the high permeability disks which becomes dominant for large {\\mu}. In this limit, the toroidal mode is close to the onset of dynamo action with a (negative) growth-rate that is rather independent of the magnetic Reynolds number. We qualitatively explain this effect by paramagnetic pumping...

  6. AREVA Logistics Business Unit Transportation Risk Management Initiative

    International Nuclear Information System (INIS)

    A safe, secure and reliable transportation organization is a key component for the success of the nuclear industry. With the forecasted increase of radioactive material transport flows in future and the changing environment, AREVA Logistic Business Unit (L-BU) must ensure that safety and security risks are minimized but also ensure of the chain supply for its various facilities (mines, conversion, enrichment, fuel manufacturing, reprocessing, etc). AREVA L-BU Unit is implementing a transportation risk management initiative for the radioactive shipments of the AREVA group across all the Business Unit involved in shipments of radioactive and nuclear materials. The paper will present the four main components of the risk management. (authors)

  7. Experience of Areva in fuel services for PWR and BWR

    International Nuclear Information System (INIS)

    AREVA being an integrated supplier of fuel assemblies has included in its strategy to develop services and solutions to customers who desire to improve the performance and safety of their fuel. These services go beyond the simple 'after sale' services that can be expected from a fuel supplier: The portfolio of AREVA includes a wide variety of services, from scientific calculations to fuel handling services in a nuclear power plant. AREVA is committed to collaborate and to propose best-in-class solutions that really make the difference for the customer, based on 40 years of Fuel design and manufacturing experience. (Author)

  8. AREVA in the Republic of South Africa

    International Nuclear Information System (INIS)

    South Africa opted to develop its electricity production sector in a safe and competitive manner using CO2 free technologies in order to support its economic and social growth. The country's ambitious energy program aims to create a lasting nuclear sector generating 20 GW of electricity by 2025 mainly from super modern water reactors and PBMRs. South Africa wishes to become a world player in the nuclear energy field, thus reinforcing its position as one of the major world producers of energy. In the strategic plan for the development of a national nuclear policy unveiled in July 2007, the government's objective is to create the suitable conditions for a nuclear industry based on the most modern technologies and promote an ambitious new builds construction program. By 2030, nuclear energy should provide 30% of electricity in South Africa, from a fleet of PWRs and PBMRs. In 2007, ESKOM's Board of Directors approved a plan to re-launch the construction of electrical plants in South Africa, to reach around 80 GW by 2025 and including the construction of an additional 20 GW of nuclear-based capacity. This nuclear revival program provides for the construction of PWR nuclear power plant generating a total of 3 GWe to 3,5 GWe, to go online as of 2016, and the consideration of a fleet of PWR power plants up to 20,000 MWe in total to gradually go on line through 2025. Five sites have already been identified for the new power stations and the nuclear company to build the power plants will be selected in 2008. AREVA's Evolutionary Power Reactor (EPR) and Westinghouse's AP 1000 have been pre-selected. The Government aims to achieve the objective of encourage the participation of Public entities such as the South African Nuclear Energy Corporation (NECSA) in the uranium value chain. Such public entities shall be used to store the secured uranium supplies, as well as participate in the local beneficiation. NECSA, as the state's body responsible for research and development in the

  9. Areva's water chemistry guidebook with chemistry guidelines for next generation plants (AREVA EPRTM reactors)

    International Nuclear Information System (INIS)

    Over the years, AREVA globally has maintained a strong expertise in LWR water chemistry and has been focused on minimizing short-term and long-term detrimental effects of chemistry for startup, operation and shutdown chemistry for all key plant components (material integrity and reliability, promote optimal thermal performances, etc.) and fuel. Also AREVA is focused on minimizing contamination and equipment/plant dose rates. Current Industry Guidelines (EPRI, VGB, etc.) provide utilities with selected chemistry guidance for the current operating fleet. With the next generation of PWR plants (e.g. AREVA's EPRTM reactor), materials of construction and design have been optimized based on industry lessons learned over the last 50+ years. To support the next generation design, AREVA water chemistry experts, have subsequently developed a Chemistry Guidebook with chemistry guidelines based on an analysis of the current international practices, plant operating experience, R and D data and calculation codes now available and/or developed by AREVA. The AREVA LWR chemistry Guidebook can be used to help resolve utility and safety authority questions and addresses regulation requirement questions/issues for next generation plants. The Chemistry Guidebook provides water chemistry guidelines for primary coolant, secondary side circuit and auxiliary systems during startup, normal operation and shutdown conditions. It also includes conditioning and impurity limits, along with monitoring locations and frequency requirements. The Chemistry Guidebook Guidelines will be used as a design reference for AREVA's next generation plants (e.g. EPRTM reactor). (authors)

  10. AREVA first half 2007 sales revenue

    International Nuclear Information System (INIS)

    The AREVA group's backlog as of June 30, 2007 was euros 33.5 billion, up 31% compared with that of December 31, 2006. On average, the Group's backlog increased by more than 20% annually over the last three years. It is now at the highest level since AREVA was established in 2001. All divisions contributed to this performance: - The Front End division signed in particular a major enrichment contract with KHNP (South Korea), a fuel supply contract with EDF covering the 2008-2012 period and other significant contracts with Japanese and Swedish utilities. - The Reactors and Services division added the Flamanville 3 EPR, ordered by EDF, to the backlog. Flamanville 3 is AREVA's 100. reactor order. - The Back End division also concluded a major contract with Sogin to treat used fuel stored at Italian nuclear sites. - The Transmission and Distribution division continued to record strong growth. New orders were up 24% compared with the first half of 2006 (+25.1% like-for-like). Important contracts were signed in the Middle East, Russia and with large industrial users of electricity. First half 2007 sales revenue was up 6.7% (+6.4% like-for-like) to euros 5373 million, compared with euros 5036 million for the first half of 2006. Major developments in the first half of 2007 include: - Sales revenue was down 2.8% to euros 1342 million in the Front End division (-3.6% like-for- like) due to uneven distribution of deliveries in the Fuel business unfavorable during the period. This timing issue has no impact on projected annual growth. The division continues to benefit from a gradual price increase for long-term uranium supply contracts. - Sales revenue was up 4.8% to euros 1154 million in the Reactors and Services division (+3% like-for-like). The Services business unit, especially, was a major contributor to growth on all its markets after a 2006 fiscal year marked by a weak demand. The start of construction of a second EPR reactor for EDF, Flamanville 3, also contributed to

  11. AREVA in 2007, growth and profitability

    International Nuclear Information System (INIS)

    This document is the 2007 activity report of the Areva group, the nuclear division of which is Number 1 worldwide in the front end of the nuclear cycle, in pressurized water reactors (in terms of installed capacity), and in the treatment and recycling of used nuclear fuel. The Transmission and Distribution division is Number 1 worldwide in market management software and grid management software, number 2 in high voltage products, and number 3 in medium voltage products. Content: Message from the Chairman of the Supervisory Board; Message from the Chief Executive Officer; Key data; 2007 highlights; Corporate governance; Organization of the group; Share information and shareholder relations; Solutions for CO2-free power generation; Solutions for reliable electricity transmission and distribution; Governance; Continuous improvement; Financial performance; Innovation; Customer satisfaction; Commitment to employees; Environmental protection; Risk management and prevention; Dialogue and consensus building; Community involvement; Auditors' report; Reporting methodology; Data verified in 2007; Glossary; and 'to learn more' references

  12. Areva - 2014 Half-year results

    International Nuclear Information System (INIS)

    The group posted a net loss in the first half of the year. This is the consequence of losses recorded in renewable operations, additional project-related provisions, asset write-downs and a nuclear market environment that has still deteriorated. Areva's backlog has strengthened thanks to the signing of the agreement through 2020 with EDF for used fuel treatment and MOX fuel production. Though it has a short-term adverse impact on the group's results, it provides these operations with long-term visibility and strengthens our strategic partnership with EDF. Despite a decline in revenue that was greater than anticipated, the group achieved positive free operating cash flow, an increase compared with the first half of 2013. The success of Areva's recovery actions partially offset the downturn in activity. These actions will be reinforced in the second half of the year to adapt to market conditions. The group continues to restructure its operations in renewable energies by entering into partnerships in promising markets, such as offshore wind and energy storage, and by discontinuing loss-making operations, such as concentrated solar power. 2014 Half-year results: - Backlog: euro 44.9 bn (euro +3.5 bn vs. 12/31/2013 thanks to the treatment-recycling agreement with EDF); - Negative net income attributable to equity owners of the parent (euro -694 m): Losses in discontinued renewable activities (euro -373 m), One-off impact of treatment-recycling agreement with EDF (euro -95 m), Provisions and assets impairment: - Positive free operating cash flow despite lower activity level: Revenue: euro 3.889 bn (-12.4% LFL), EBITDA: euro 256 m (euro -231 m vs. H1 2013), Free operating cash flow: euro 98 m (euro +256 m vs. H1 2013); - Strengthened recovery actions in an unfavorable economic environment: 2015 cost reduction objective secured and raised to euro 1.2 bn by 2016, Capital expenditure reduced over 2014-16; - Revised financial outlook

  13. Commissioning of Nuclear Power Plants. The AREVA approach

    International Nuclear Information System (INIS)

    Georges Mateo, Fellow Expert at AREVA, closed the last day of conferences by detailing deeply the different phases of NPPs commissioning. He insisted on the skills required to be a Commissioning engineer and on the carrier opportunities that it offers

  14. Areva 2009 responsible growth report: more energy, less CO2

    International Nuclear Information System (INIS)

    This document is the 2009 annual responsible growth report of AREVA which presents itself as having consolidated its leadership position in its original business of nuclear power while expanding considerably in renewable energies (wind, solar, bio-energies and hydrogen/storage) to become a leading provider of solutions for carbon-free power generation. The main chapters of the report are: the group and its strategy, Areva's nuclear power solutions (is nuclear a sustainable energy source?, supply, technological excellence, safety, recycling and waste, acceptability, non-proliferation), Areva's renewable energy solutions (how much of the energy mix should be renewable?, rising demand, competitiveness and efficiency, responsible development), Areva's human resources (gender balance, health and safety, diversity and opportunity, hiring and training). Data and balanced scorecard for sustainable development are also given

  15. Large N_c

    OpenAIRE

    Jenkins, Elizabeth E.

    2009-01-01

    The 1/N_c expansion of QCD with N_c=3 has been successful in explaining a wide variety of QCD phenomenology. Here I focus on the contracted spin-flavor symmetry of baryons in the large-N_c limit and deviations from spin-flavor symmetry due to corrections suppressed by powers of 1/N_c. Baryon masses provide an important example of the 1/N_c expansion, and successful predictions of masses of heavy-quark baryons continue to be tested by experiment. The ground state charmed baryon masses have all...

  16. The Areva Group back-end division - challenges and prospects

    International Nuclear Information System (INIS)

    This document presents the Areva Group back-end division challenges and prospects. Areva, a world nuclear industry leader, analyzes in this document, the high-profile mix of complementary activities of the nuclear energy industry, concerning the back-end division the full range of services for the end of the fuel cycle, the fuel cycle back-end markets, the economic and financial associated considerations. (A.L.B.)

  17. NOCHAR Polymers: An Aqueous and Organic Liquid Solidification Process for Cadarache LOR (Liquides Organiques Radioactifs) - 13195

    International Nuclear Information System (INIS)

    To handle the Very Low Level Waste (VLLW) and the Low Level Waste (LLW) in France, two options can be considered: the incineration at CENTRACO facility and the disposal facility on ANDRA sites. The waste acceptance in these radwaste routes is dependent upon the adequacy between the waste characteristics (physical chemistry and radiological) and the radwaste route specifications. If the waste characteristics are incompatible with the radwaste route specifications (presence of significant quantities of chlorine, fluorine, organic component etc or/and high activity limits), it is necessary to find an alternative solution that consists of a waste pre-treatment process. In the context of the problematic Cadarache LOR (Liquides Organiques Radioactifs) waste streams, two radioactive scintillation cocktails have to be treated. The first one is composed of organic liquids at 13.1 % (diphenyloxazol, mesitylene, TBP, xylene) and water at 86.9 %. The second one is composed of TBP at 8.6 % and water at 91.4 %. They contain chlorine, fluorine and sulphate and have got alpha/beta/gamma spectra with mass activities equal to some kBq.g-1. Therefore, tritium is present and creates the second problematic waste stream. As a consequence, in order for disposal acceptance at the ANDRA site, it is necessary to pre-treat the waste. The NOCHAR polymers as an aqueous and organic liquid solidification process seem to be an adequate solution. Indeed, these polymers constitute an important variety of products applied to the treatment of radioactive aqueous and organic liquids (solvent, oil, solvent/oil mixing etc) and sludge through a mechanical and chemical solidification process. For Cadarache LOR, N910 and N960 respectively dedicated to the organic and aqueous liquids solidification are considered. With the N910, the organic waste solidification occurs in two steps. As the organic liquid travels moves through the polymer strands, the strands swell and immobilise the liquid. Then as the

  18. The Areva Group back-end division - challenges and prospects; Le pole aval dans le groupe Areva - enjeux et perspectives

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-06-01

    This document presents the Areva Group back-end division challenges and prospects. Areva, a world nuclear industry leader, analyzes in this document, the high-profile mix of complementary activities of the nuclear energy industry, concerning the back-end division the full range of services for the end of the fuel cycle, the fuel cycle back-end markets, the economic and financial associated considerations. (A.L.B.)

  19. Areva - Press release from the Supervisory Board; Areva - Communique de presse du Conseil de Surveillance

    Energy Technology Data Exchange (ETDEWEB)

    Marie, Patricia; Briand, Pauline; Floquet-Daubigeon, Fleur; Michaut, Maxime; Scorbiac, Marie de; Repaire, Philippine du

    2012-02-14

    During its meeting held on December 12, 2011, devoted in particular to the examination of the 2011 closing estimates, the AREVA Executive Board indicated that it expected to book a provision of 1.46 billion euros (2.025 billion US dollars) in the company's accounts for fiscal year 2011 for impairment of assets for the reporting entity UraMin, a mining company acquired by AREVA in 2007, which, given the provision booked in 2010 (426 million euros), brings the value of these assets on the AREVA balance sheet down to 410 million euros. Given the size of these provisions, the Supervisory Board decided to make three of its members, meeting as an ad hoc committee, in charge of analyzing the terms of acquisition of this company, as well as the key decisions made in this reporting entity up to 2011 and, based on the outcome of these analyses, to recommend to it any appropriate measures in AREVA's interest. This committee reported on its work during the Supervisory Board meeting held on February 14, 2012. In light of this report, the Supervisory Board found that the fairness and reliability of the financial statements of previous years were not in question. Nevertheless, considering the malfunctions raised, the Board considers it appropriate to thoroughly review AREVA's governance in order to ensure that decisions concerning large acquisitions or investments be reviewed and validated in the future under conditions ensuring better legal and financial security and enabling a more transparent dialogue between management and the Supervisory Board. It thus asked the Executive Board to recommend, at the next General Meeting of Shareholders, that the by-laws of the company be modified to make the Supervisory Board's prior approval of investments, stake acquisitions and acquisitions mandatory above a threshold of 20 million euros. It also decided to set up a business ethics committee within the Supervisory Board responsible for ensuring that rules of conduct are

  20. Areva as of December 31, 2011; Areva au 31 decembre 2011

    Energy Technology Data Exchange (ETDEWEB)

    Marie, Patricia; Briand, Pauline; Michaut, Maxime; Scorbiac, Marie de; Repaire, Philippine du

    2012-01-26

    In 2011, AREVA's consolidated revenue came to 8.872 billion euros, down slightly (-2.6%) compared with 2010 (-1.2% like for like). The decrease in revenue in nuclear operations was partially offset by significant growth in the renewable energies business. Foreign exchange and changes in the scope of consolidation had respectively a negative impact of 113 million euros and 16 million euros over the period. Revenue totaled 2.922 billion euros in the fourth quarter of 2011, stable compared with the fourth quarter of 2010 (-0.5% on a reported basis and -0.5% like for like). Foreign exchange had a negligible impact during the period. Led by nuclear operations, the group's backlog was 45.6 billion euros at December 31, 2011, up 3.1% year on year and 6.7% in relation to September 30, 2011. Order cancellations since Fukushima were limited to 464 million euros as of December 31, 2011. In accordance with the requirements of IFRS 8, AREVA's business segment information is presented for each operating Business Group (BG), which is the level of information examined by the group's governance bodies. Subsequent to the establishment of a subsidiary combining all of the group's mining operations, data for the Mining Business Group are now reported separately from those of the Front End Business Group. Data used for comparisons with 2010 were restated to reflect this new organization. The business segment information therefore corresponds to AREVA's five operating Business Groups: Mining, Front End, Reactors and Services, Back End and Renewable Energies

  1. AREVA and sustainable development. 2002 report; AREVA et le developpement durable. Rapport 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The performance indicators in this report reflect the major sustainable development impacts and challenges that Areva is facing as a group due to the very nature of its operations. They chose the calendar year as reporting period, from January 1 to December 31. This report covers all of the group operations in France and abroad. This report presents an overview of the major financial, social and environmental challenges facing the group. This report is a companion document to the annual activity report. (A.L.B.)

  2. AREVA Technical Days (ATD) session 1: Energy outlook and presentation of the Areva Group

    International Nuclear Information System (INIS)

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This first session deals with energy challenges and nuclear, public acceptance of nuclear power, mining activities, chemistry activities, enrichment activities, fuel assembly, reactors and services activities, nuclear measurements activities, reprocessing and recycling activities, logistics activities and connectors activities. (A.L.B.)

  3. Areva half-year report june 30, 2006; Areva rapport semestriel 30 juin 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This document is the half-year financial report of the Areva group for 2006. It presents: 1 - Highlights of the period; 2 - Key data: Summary data, Segment reporting, Backlog, Income statement, Review by business division, Cash flow, Balance sheet data; 3 - Outlook; 4 - Events subsequent to the half-year end; 5 - Consolidated financial statements: Statutory auditors' report on the interim consolidated financial statements for the period January 1, 2006 to June 30, 2006, Consolidated income statement, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of changes in equity, Segment reporting, Notes to the consolidated financial statements.

  4. Areva half-year report June 30, 2008; Areva rapport semestriel 30 juin 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This document is the half-year financial report of the Areva group for 2008. It presents: 1 - the highlights of the period: key data (Summary data, Segment reporting, Backlog, Income statement, Review by division, Cash flow, Balance sheet data); Outlook; 2 - the events subsequent to half-year closing; 3 - the consolidated financial statements: Statutory Auditors' report on half-year 2008 information for the period January 1, 2008 to June 30, 2008, Consolidated income statement, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of change in equity, Segment reporting, Notes to the consolidated financial statements for the period ending June 30, 2008.

  5. AREVA in 2007, growth and profitability

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This document is the 2007 activity report of the Areva group, the nuclear division of which is Number 1 worldwide in the front end of the nuclear cycle, in pressurized water reactors (in terms of installed capacity), and in the treatment and recycling of used nuclear fuel. The Transmission and Distribution division is Number 1 worldwide in market management software and grid management software, number 2 in high voltage products, and number 3 in medium voltage products. Content: Message from the Chairman of the Supervisory Board; Message from the Chief Executive Officer; Key data; 2007 highlights; Corporate governance; Organization of the group; Share information and shareholder relations; Solutions for CO{sub 2}-free power generation; Solutions for reliable electricity transmission and distribution; Governance; Continuous improvement; Financial performance; Innovation; Customer satisfaction; Commitment to employees; Environmental protection; Risk management and prevention; Dialogue and consensus building; Community involvement; Auditors' report; Reporting methodology; Data verified in 2007; Glossary; and 'to learn more' references.

  6. Areva - first half 2007 financial results

    International Nuclear Information System (INIS)

    This document presents the financial statements of Areva group for the first half of 2007 as submitted by the Executive Board: Sales revenue: euro 5.373 billion, up by 6.7%; Operating income: euro 207 million, i.e. 3.9% operating margin, up 1.6 point compared with H1 2006; Consolidated net income: euro 295 million, i.e. euro 8.31 per share in H1 2007 against euro 6.92 per share in H1 2006, a 20% increase. All Group performance indicators were up the first half of 2007. Growth was robust and profitability strengthened significantly in terms of both operating income and net income. Consolidated sales revenue rose 6.7% for the first half of 2007 alone, after growth of more than 7% in 2006. This positive trend will continue: the backlog grew by 31% in the first half to more than euro 33 billion, compared with euro 26 billion six months ago and euro 21 billion at year-end 2005. Business is up sharply in the Transmission and Distribution division, which had operating margin of 8.7% in the first half of the year

  7. KROTOS FCI experimental programme at CEA Cadarache: new features and status

    Energy Technology Data Exchange (ETDEWEB)

    Bonnet, J.M.; Bullado, Y.; Journeau, C.; Fouquart, P.; Piluso, P.; Sergeant, C.; Magallon, D. [CEA-Cadarache, DTN/STRI/LMA, Bat 708, BP1, 13108 Saint Paul lez Durance cedex (France)

    2005-07-01

    Full text of publication follows: KROTOS facility has been operated by the European Commission at JRC-Ispra for many years until 1999 as part of the FARO/KROTOS programme. The programme had to be stopped at JRC due to new EC priorities, and an agreement was concluded with CEA to transfer the KROTOS facility and know-how to Cadarache to continue investigating the pending FCI issues. By this agreement, CEA became owner of the facility. The main objective of the KROTOS programme at CEA Cadarache is understanding the role of melt properties in steam explosion propagation and energetics and, in particular, steam explosion behaviour of prototypical corium melts. Possible influence of physicochemical processes on explosiveness will also be explored. Actually, analysis of alumina debris produced at Ispra have shown that formation of metastable phases and chemical reaction with water at high temperature may play a significant role in enhancing heat transfer to water in the explosion phase. In order to reach the objective, steam explosion experiments are performed in well characterised conditions for a large spectrum of conditions and melt compositions of interest for both in- and ex-vessel situations. A trigger is applied as a rule. Advanced technology and instrumentation is used to reduce uncertainties on initial conditions and characterise the various phases of an explosion, with emphasis on high energy X-ray cinematography to qualify pre-mixing. This advanced instrumentation will enable the measurement of detailed variables to consolidate the qualification of the FCI codes. The use of high energy X-rays made it necessary to construct a new building to house the facility and its components. The facility should newly become operative early 2005. Main improvements with respect to Ispra concern melt delivery, hydrogen measurement and X-ray imaging. Preliminary studies have demonstrated that identification of the pre-mixture-water interface and coherent melt jet core, and

  8. T and D on sale, Areva on punishment; T and D a la vente, Areva a la peine

    Energy Technology Data Exchange (ETDEWEB)

    Maincent, G

    2009-05-15

    Areva group, the world leader of the nuclear industry, is looking for 5 billion euros to finance its investments. However, the French government which owns 90% of the group, mainly through the CEA, is not willing to supply this financial help. Therefore, about 40% of Areva group's turnover could change hands soon. In fact, the French government has asked Areva to consider the selling of its daughter company T and D (Transmission and Distribution) which is one of the major poles of the group's activity. Thanks to T and D, Areva can propose a complete range of products, services and systems from the low- to the extra-high voltage, and can be present on other energy markets, from the conventional to the renewable power generation. Already weakened by the departure of Siemens, Areva, without T and D would lose its full power in front of competitors like GE-Hitachi, Toshiba-Westinghouse or Rosatom-Siemens. (J.S.)

  9. Proceedings of the Areva Technical Days. Session 5

    International Nuclear Information System (INIS)

    This document presents the proceedings of the Areva technical days, presented during the session 5 the 9 and 10 december 2004, at Istanbul. It deals with the operations of the transmission and distribution division. With manufacturing facilities in over 40 countries and a sales network in over 100, Areva offers customers technological solutions for nuclear power generation and electricity transmission and distribution (the Group also provides interconnect systems to the telecommunications, computer and automotive markets). It provides five topics: a general presentation of Areva, the strategic stakes for transmission and distribution by world-zone, economic and strategic stakes of business unit products, business unit systems and business unit automation. (A.L.B.)

  10. Proceedings of the Areva Technical Days. Session 5

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This document presents the proceedings of the Areva technical days, presented during the session 5 the 9 and 10 december 2004, at Istanbul. It deals with the operations of the transmission and distribution division. With manufacturing facilities in over 40 countries and a sales network in over 100, Areva offers customers technological solutions for nuclear power generation and electricity transmission and distribution (the Group also provides interconnect systems to the telecommunications, computer and automotive markets). It provides five topics: a general presentation of Areva, the strategic stakes for transmission and distribution by world-zone, economic and strategic stakes of business unit products, business unit systems and business unit automation. (A.L.B.)

  11. Flow modelling in fractured aquifers, development of multi-continua model (direct and inverse problems) and application to the CEA/Cadarache site

    International Nuclear Information System (INIS)

    This research thesis concerns the modelling of aquifer flows under the CEA/Cadarache site. The author reports the implementation of a numerical simulation tool adapted to large scale flows in fractured media, and its application to the Cadarache nuclear site. After a description of the site geological and hydrogeological characteristics, the author presents the conceptual model on which the modelling is based, presents the inverse model which allows a better definition of parameters, reports the validation of the inverse approach by means of synthetic and semi-synthetic cases. Then, he reports experiments and simulation of the Cadarache site

  12. 'Action 2016': AREVA's strategic action plan

    International Nuclear Information System (INIS)

    On December 13, 2011, Luc Oursel, CEO, and Pierre Aubouin, Chief Financial Officer presented the group's strategic plan for the period 2012-2016. The plan has been drawn up collectively and is based on a thorough-going analysis and a realistic assessment of perspectives for all group activities and associated resources. Development of nuclear and renewable energies: the fundamentals are unchanged. In this context, the German decision remains an isolated case and the great majority of nuclear programs around the world have been confirmed. More conservative in its projections than the International Energy Agency, the group expects growth of 2.2% annually, reaching 583 GW of installed nuclear capacity by 2030, against 378 GW today. However, the Fukushima accident will lead to delays in launching new programs. 'Action 2016' plan aims to consolidate AREVA's leadership in nuclear energy and become a leading player in renewable energy. The group's strategic action plan 'Action 2016' is based on the following strategic choices: - commercial priority given to value creation, - selectivity in investments, - strengthening of the financial structure. These demand an improvement in the group's performance by 2015. This plan makes nuclear safety a strategic priority for the industrial and commercial performance of the group. This ambitious performance plan for the period 2012-2016 will give the group the wherewithal to withstand a temporary slowdown in the market resulting from the Fukushima accident and to deliver safe and sustainable growth of the business. The plan sets out the strategic direction for the group's employees for the years ahead: taking advantage of the expected growth in nuclear and renewable energies, targeted investment programs, and return to self-financing as of 2014

  13. Responsible Development of Areva's Mining Activities. 2010 report

    International Nuclear Information System (INIS)

    After a map indicating the location of the main Areva's mining sites, this report provides several key figures and data and discusses the evolution of this activity which is part of the business core of the AREVA company. It gives a statement of values and principles, governance and commitments related to this activity. In order to report this activity, it addresses several topics: reduction of industrial risks, protection of workers and populations, rational consumption of water and energy resources, biodiversity preservation, management over time of waste rock and mining tailings, sustainable integration into territories, and contribution to social development. This document is proposed in French and in English

  14. Responsible Development of AREVA's Mining Activities - Report 2012

    International Nuclear Information System (INIS)

    By defining AREVA's strategy and policies, this report aims to demonstrate the company's performance in the key areas of mining activity responsibility: ethics and governance, social report, the environment, occupational health and safety, community involvement, commitments to stakeholders. The data given cover the assets for which AREVA acts as operator in uranium mining activities: exploration, project development, production and rehabilitation. The consolidated data target activities in France, Canada, Niger, Kazakhstan, Mongolia, Gabon and Namibia. Activities in the Central African Republic and those linked to La Mancha no longer fall within the scope of this report (sale of assets in 2012). This report is the third edition of this annual exercise

  15. Areva - First half 2008 sales revenue; Areva - Chiffre d'affaires du 1. semestre 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    As of June 30, 2008, AREVA's backlog stood at 38.1 billion euro, for 13.6% growth since June 30, 2007, with 9.9% growth in Nuclear and 40.7% growth in Transmission and Distribution. In Nuclear, the backlog came to 32.3 billion euro as of the end of June 2008. In the front end of the cycle, AREVA signed multi-year contracts in the first half of the year with Japanese and American utilities and with EDF, for a combined total of more than 1 billion euro. Of note in the back end of the cycle is the contract AREVA signed with the U.S. Department of Energy to build a MOX fuel fabrication facility. In Transmission and Distribution, the backlog came to 5.8 billion euro as of the end of period. A total of 3.2 billion euro in orders was booked in the first half, an increase of 20.0% year-on-year. The division won several important contracts, most notably a contract with Dubai Electricity (more than 130 million euro), a contract with National Grid and RTE for the renovation of the IFA 2000 grid interconnection between France and Great Britain (more than 60 million euro), and, in the industrial field, a contract with Rio Tinto Alcan (close to 65 million euro). The group cleared revenue of 6.2 billion euro in the first half of 2008, up 14.8% (+16.4% like-for-like) compared with the first half of 2007. Sales outside France were up 14.3% to 4.2 billion euro or 68.6% of total sales; the latter were stable compared with the first half of 2007. All businesses were up, with growth of 15.9% in Nuclear operations (+19.1% LFL1) - particularly in Reactors and Services (+31.3% LFL1) - and 13.0% growth in Transmission and Distribution operations (+12.0% LFL T 1). Foreign exchange had a negative impact of 155 million euro, primarily due to the change in the U.S. dollar in relation to the euro. Changes in the consolidated group had a positive impact of 97 million euro, mainly reflecting acquisitions in the Transmission and Distribution division and in Renewable Energies. Sales revenue

  16. Areva half-year report june 30, 2007; Areva rapport semestriel 30 juin 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    Information provided in this document concerns the AREVA group as a whole. It presents the highlights and Key data of the first half of 2007, the outlook, the events subsequent to half-year closing, and the Consolidated financial statements. Contents: 1 - Highlights of the period; 2 - Key data: Summary data, Segment reporting, Backlog, Income statement, Review by division, Cash flow, Balance sheet data; 3 - Outlook; 4 - Events subsequent to half-year closing; 5 - Consolidated financial statements: Statutory Auditors' report on half-year information for the period January 1, 2007 to June 30, 2007, Consolidated income statement, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of change in equity, Segment reporting, Notes to the consolidated financial statements for the period ending June 30, 2007.

  17. AREVA Technical Days (ATD) session 4: operations of the front-end division of the nuclear fuel cycle; AREVA Technical Days (ATD) session 4: les activites du pole Amont

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This fourth session deals with the strategic and financial significance of the Areva mining operations, the Areva chemistry business, the Areva enrichment business and the Areva fuel business. (A.L.B.)

  18. AREVA Technical Days (ATD) session 4: operations of the front-end division of the nuclear fuel cycle

    International Nuclear Information System (INIS)

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This fourth session deals with the strategic and financial significance of the Areva mining operations, the Areva chemistry business, the Areva enrichment business and the Areva fuel business. (A.L.B.)

  19. Areva 2007 results: accelerated growth and significantly improved profitability

    International Nuclear Information System (INIS)

    The AREVA group recorded accelerated growth and increased profitability in 2007, meeting both of its objectives for the year. The group made strategic inroads in fast growing markets. AREVA's integrated model met with record success in China, where GGNPC acquired two EPR nuclear islands in a combined order including both the reactors and the fuel, and the creation of a joint venture in engineering. Its T and D division was awarded the largest contract of its history in Qatar, making it the leader in a region where T and D was not even present a few years ago. For more than three years, AREVA has built up its capacity to meet surging demand in the nuclear power and T and D markets through an active policy of research and development and by capitalizing on the diversity and strength of its partnerships. Areva hired 8,600 people in 2006 and 11,500 people in 2007; this represents an investment in recruitment, training and integration of approximately euro 200 million per year. For 2008, the group foresees a further increase in its backlog, sales revenue and operating income. The Areva Group financial statements for 2007 are summarized below: - Backlog: euro 39.8 billion, up 55%; - Sales revenue: euro 11.9 billion, up 9.8% (up 10.4% like-for-like); - Operating income: euro 751 million, i.e. 6.3% operating margin, up 2.6 points compared with 2006; - Net income attributable to equity holders of the parent: euro 743 million (euro 20.95 per share), up from euro 649 million in 2006 (euro 18.31 per share); - Net debt: euro 1.954 billion, linked to the acquisition of UraMin; - Dividend: euro 6.77, to be proposed to the Annual General Meeting of Shareholders convening on April 17, 2008

  20. Nuclear renaissance in the reactor training of Areva

    Energy Technology Data Exchange (ETDEWEB)

    De Braquilanges, Bertrand [Reactor Training Center/France Manager, La Tour Areva - 1, place Jean Millier - 92084 Paris - La Defense (France); Napior, Amy [Reactor Training Center/USA Manager, 1300 Old Graves Mill Road - Lynchburg VA, 2450 (United States); Schoenfelder, Christian [Reactor Training Center/Germany Manager, Kaiserleistrasse 29 - 63067 Offenbach (Germany)

    2010-07-01

    Because of the perspectives of new builds, a significant increase in the number of design, construction and management personnel working in AREVA, their clients and sub-contractors has been estimated for the next future. In order to cope with the challenge to integrate newly hired people quickly and effectively into the AREVA workforce, a project - 'Training Task Force (TTF)' - was launched in 2008. The objective was to develop introductory and advanced courses and related tools harmonized between AREVA Training Centers in France, Germany and USA. First, a Global Plants Introductory Session (GPIS) was developed for newly hired employees. GPIS is a two weeks training course introducing in a modular way AREVA and specifically the activities and the reactors technical basics. As an example, design and operation of a nuclear power plant is illustrated on EPRTM. Since January 2009, these GPIS are held regularly in France, Germany and the US with a mixing of employees from these 3 regions. Next, advanced courses for more experienced employees were developed: - Advanced EPR{sup TM}, giving a detailed presentation of the EPR{sup TM} reactor design; - Codes and Standards; - Technical Nuclear Safety. Finally, feasibility studies on a Training Material Management (TMM) system, able to manage the training documentation, and on a worldwide training administration tool, were performed. The TTF project was completed mid of 2009; it transferred their recurrent activities to a new AREVA training department. This unit now consists of the French, German and US Reactors Training Centers. In particular, all courses developed by the TTF are now implemented worldwide with an opening to external trainees. The current worldwide course catalogue includes training courses for operation and maintenance personnel as well as for managers, engineers and non technical personnel of nuclear operators, suppliers, safety authorities and expert organizations. Training delivery is supported

  1. Areva - first half 2007 financial results; Areva - resultats du 1. semestre 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This document presents the financial statements of Areva group for the first half of 2007 as submitted by the Executive Board: Sales revenue: euro 5.373 billion, up by 6.7%; Operating income: euro 207 million, i.e. 3.9% operating margin, up 1.6 point compared with H1 2006; Consolidated net income: euro 295 million, i.e. euro 8.31 per share in H1 2007 against euro 6.92 per share in H1 2006, a 20% increase. All Group performance indicators were up the first half of 2007. Growth was robust and profitability strengthened significantly in terms of both operating income and net income. Consolidated sales revenue rose 6.7% for the first half of 2007 alone, after growth of more than 7% in 2006. This positive trend will continue: the backlog grew by 31% in the first half to more than euro 33 billion, compared with euro 26 billion six months ago and euro 21 billion at year-end 2005. Business is up sharply in the Transmission and Distribution division, which had operating margin of 8.7% in the first half of the year.

  2. AREVA - first half 2005 sales figures; AREVA - chiffre d'affaires du 1. semestre 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    First half 2005 sales for the AREVA group were up 1.1% to 5,396 million euros and 2.6% like-for-like, compared with 5,339 million euros for the same period in 2004.The change in foreign exchange rates had a negative impact of nearly (34) million euros between these two periods, which was much less than between the first half of 2003 and the same period in 2004. Sales are up 1.1% compared with the first half of 2004 (up 2.6% like-for-like); the euros (17.3) M impact of IFRS adoption is limited to the Front End division; Energy is up: Nuclear Power: up 4.4% (up 5.5% like-for-like), driven by the Front End and Reactors and Services divisions; T and D: down 3.9% (-2.1% like-for-like) due to the one time peak observed in early 2004; Connectors sales are stable (+0.3% like-for-like): Automotive performed well, while the communication market continued to be a difficult one.

  3. Rapport d'étude : La perception des risques majeurs par les riverains du CEA de Cadarache

    OpenAIRE

    Lopez, Alexia; Régner, Isabelle; Schleyer-Lindenmann, Alexandra

    2015-01-01

    Ce rapport d'étude vient répondre aux interrogations de son commanditaire, la CLI (Commission Local d'Information) du CEA (Commissariat à l'énergie Atomique) de Cadarache. Il s'organise en trois partie : une première partie établit un état des lieux des connaissances des risques majeurs par les habitants. Les risques majeurs officiellement recensés sont : le risque feu de forêt, le risque inondation, le risque sismique, le risque de mouvement de terrain, le risque de rupture de barrage, et le...

  4. Responsible Development of Areva's Mining Activities. Report 2011

    International Nuclear Information System (INIS)

    After a presentation of the approach to responsibility adopted by AREVA to be a responsible mining stake holder (charter of values, implemented policies, risk prevention and management, best practices), this report gives an overview of mining activities (international presence, production in constant increase) with a focus on uranium mining which is the core business (the different phases are briefly presented: exploration, project development, mining, site decommissioning). It outlines personnel qualification and commitment, actions and policy in the field of personnel health and safety. It addresses the environmental policy: key levers, environmental management system, examples throughout the entire mining life cycle, changes in site consumptions and emissions, promotion of biodiversity. The next part concerns Areva's social commitment (dialogue, development aid in mining territories). Then, performance is expressed in terms of indicators for these different issues (teams, environmental policy, social involvement)

  5. Large valve test facilities of AREVA NP GmbH

    Energy Technology Data Exchange (ETDEWEB)

    Beisiegel, A.; Wagner, T.; Stecher, W.

    2011-07-01

    As market leader in the field of nuclear power plant technology, AREVA runs an internationally-unique test and qualification infrastructure for power plant components. The associated Thermal-Hydraulic Platform with different test facilities in Karlstein and Erlangen has been recognized as a test body according to ISO 17025. The DAkkS the German Society for Accreditation has now also certified the Thermal-hydraulic Platorm as an independent inspection body Type C according to ISO 17020.

  6. Environmental, social, and corporate report 2012 - Cezus Rugles (Areva)

    International Nuclear Information System (INIS)

    CEZUS, a subsidiary of AREVA, is the global leader in the zirconium market, the metal used, among other things, for fuel assembly tube cladding in the heart of nuclear reactors. CEZUS's operations are distributed over six sites: the Rugles site manufactures flat products originated from the pilgering of rectangular billets. This document shows details of the CEZUS Rugles facility and its 2012 initiatives on: consumption and waste management, risk management, environmental and safety management, social and corporate responsibilities

  7. Environmental, social, and corporate report 2012 - Cezus Jarrie (Areva)

    International Nuclear Information System (INIS)

    CEZUS, an AREVA group subsidiary, is the global leader in the market for nuclear-grade zirconium. Zirconium is a metal used for fuel cladding, among other applications. CEZUS operates at six sites; the Jarrie site in the Isere department of France produces zirconium sponge. This document shows details of the CEZUS Jarrie facility and its 2012 initiatives on: consumption and waste management, risk management, environmental and safety management, social and corporate responsibilities

  8. Environmental, social, and corporate report 2010 - Cezus Ugine (Areva)

    International Nuclear Information System (INIS)

    CEZUS, a subsidiary of AREVA, is the global leader in the market for zirconium, the metal used, among other things, for nuclear fuel cladding. CEZUS's operations are distributed over six sites. The site in Ugine handles production of ingots and transformation of zirconium, titanium, tantalum, and hafnium into semi-finished products. This document shows details of the CEZUS Ugine facility and its 2010 initiatives on: consumption and waste management, risk management, environmental and safety management, social and corporate responsibilities

  9. Areva 2006 figures - Economic, social, societal and environmental data

    International Nuclear Information System (INIS)

    This document presents the 2006 economic, social, societal and environmental data of the Areva Group. Content: 1 - Improvement initiative: Continuous improvement, Innovation, stakeholder relations, local economic development, Financial performance; 2 - Commitment to employees: Health and safety, Radiation protection, Radiological impacts, Technological risks, employees and training; 3 - Environment: Water, Energy, Gaseous releases, Liquid releases, Conventional waste, Radioactive waste; 4 - Reporting and performance indicators: Reporting methodology, Auditors' report, Social indicators, Environmental indicators

  10. Areva. 2007 figures economic, social, societal and environmental data

    International Nuclear Information System (INIS)

    This document presents the 2007 economic, social, societal and environmental data of the Areva Group. Content: 1 - Improvement initiative: Continuous improvement, Innovation; 2 - Financial performance: 2007 results; 3 - Commitment to employees: Stakeholder relations, Health and safety, Radiation protection, Radiological impacts, Technological risks, Workforce, Workforce and training; 4 - Environment: Water, Energy, Gaseous releases, Liquid releases, Conventional waste, Radioactive waste; 5 - Reporting and performance indicators: Reporting methodology, Auditors' report, Social indicators, Environmental indicators

  11. AREVA in Niger, a long term uranium producer

    International Nuclear Information System (INIS)

    Full text: Niger ranks number three amongst uranium producing countries and holds the fourth world resources. Niger Uranium story started fifty years ago and AREVA is its first partner since. AREVA/COGEMA inherited the exploration programs conducted by former 'Bureau Minier de la France d'Outre-mer' and 'Commissariat a l'Energie Atomique' in the early sixties. Arlit's deposits came out of that. In association with other partners (Niger government through ONAREM, Japan and Spain), uranium production started in 1967 with joint venture company SOMAIR followed by COMINAK. That partnership stands sound through the 1980-2003 market depression and production rate never slows since. Near by prospects allow extension and keeping activities ahead as it is the case now where the two companies have more than ten years production assured reserves. New major project is also on hand with more than 100 000 tons of uranium. AREVA/COGEMA foresaw the current market upraise when it launched a large exploration program three years ago in its previous allotted area. Regulatory agreement is underway for more prospecting areas allocation. More decades of uranium production resources are expected. This long partnership is supported by a sustainable development commitment in a hard to live desert area: health care, school, training, water supply, energy and employment. (author)

  12. Areva - Results for the first half of 2009

    International Nuclear Information System (INIS)

    Areva Group's results for the first half of 2009 can be summarized as follows: - Backlog of 48,876 million euro: +28% compared to June 30, 2008; - Sales revenue of 6,522 million euro: + 6% compared to the first half of 2008; - Operating income before additional provision for the Finnish OL3 project: 566 million euro, representing an operating margin of 8.7%; - Operating income: 16 million euro; - Net income attributable to equity holders of the parent: 161 million euro, or 4.55 euro per share; - Net debt of 6,414 million euro; - AREVA capital increase and opening of capital to strategic and industrial partners and launch of an open call for bids for the T and D activity; - Granting of a long-term Standard and Poor's 'A' rating and confirmation of the short-term 'A1' rating - stable outlook. Based on the consolidation scope as at June 30, 2009, AREVA anticipates for the financial year 2009: - strong growth in the backlog; - strong growth in sales revenue; - operating income close to that of the financial year 2008. The document includes the transparencies of the presentation of the first half 2009 results

  13. Status of safety at Areva group facilities. 2007 annual report; Areva, etat de surete des installations nucleaires. Rapport annuel 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This report describes the status of nuclear safety and radiation protection in the facilities of the AREVA group and gives information on radiation protection in the service operations, as observed through the inspection programs and analyses carried out by the General Inspectorate in 2007. Having been submitted to the group's Supervisory Board, this report is sent to the bodies representing the personnel. Content: 1 - A look back at 2007 by the AREVA General Inspector: Visible progress in 2007, Implementation of the Nuclear Safety Charter, Notable events; 2 - Status of nuclear safety and radiation protection in the nuclear facilities and service operations: Personnel radiation protection, Event tracking, Service operations, Criticality control, Radioactive waste and effluent management; 3 - Performance improvement actions; 4 - Description of the General Inspectorate; 5 - Glossary.

  14. Status of safety at Areva group facilities. 2006 annual report; Etat de surete des installations nucleaires. Rapport annuel 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This report presents a snapshot of nuclear safety and radiation protection conditions in the AREVA group's nuclear installations in France and abroad, as well as of radiation protection aspects in service activities, as identified over the course of the annual inspections and analyses program carried out by the General Inspectorate in 2006. This report is presented to the AREVA Supervisory Board, communicated to the labor representation bodies concerned, and made public. In light of the inspections, appraisals and coordination missions it has performed, the General Inspectorate considers that the nuclear safety level of the AREVA group's nuclear installations is satisfactory. It particularly noted positive changes on numerous sites and efforts in the field of continuous improvement that have helped to strengthen nuclear safety. This has been possible through the full involvement of management teams, an improvement effort initiated by upper management, actions to increase personnel awareness of nuclear safety culture, and supervisors' heightened presence around operators. However, the occurrence of certain events in facilities has led us to question the nuclear safety repercussions that the changes to activities or organization on some sites have had. In these times of change, drifts in nuclear safety culture have been identified. The General Inspectorate considers that a preliminary analysis of the human and organizational factors of these changes, sized to match the impact the change has on nuclear safety, should be made to ensure that a guaranteed level of nuclear safety is maintained (allowance for changes to references, availability of the necessary skills, resources of the operating and support structures, etc.). Preparations should also be made to monitor the changes and spot any telltale signs of drift in the application phase. Managers should be extra vigilant and the occurrence of any drift should be systematically dealt with ahead of

  15. Areva. 2007 figures economic, social, societal and environmental data; Areva. Chiffres 2007 donnees economiques, sociales, societales et environnementales

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This document presents the 2007 economic, social, societal and environmental data of the Areva Group. Content: 1 - Improvement initiative: Continuous improvement, Innovation; 2 - Financial performance: 2007 results; 3 - Commitment to employees: Stakeholder relations, Health and safety, Radiation protection, Radiological impacts, Technological risks, Workforce, Workforce and training; 4 - Environment: Water, Energy, Gaseous releases, Liquid releases, Conventional waste, Radioactive waste; 5 - Reporting and performance indicators: Reporting methodology, Auditors' report, Social indicators, Environmental indicators.

  16. Decree of January 11, 2016 bearing homologation of the decision nr 2015-DC-0536 by the Nuclear Safety Authority of December 22, 2015 defining threshold values of releases in the environment of liquid and gaseous effluents from base nuclear installations nr 33 (UP2-400), 38 (STE2 et AT1), 47 (ELAN II B), 80 (HAO), 116 (UP3-A), 117 (UP2-800) and 118 (STE3 effluent processing station) exploited by AREVA NC on the La Hague site (Manche district)

    International Nuclear Information System (INIS)

    After having mentioned the various related and reference legal texts, this legal publication specifies the various threshold values which must be applied to liquid and gaseous releases of nuclear installations located in La Hague for a better control and management of pollutions and of the impact of these installations on the environment. Threshold values are thus specified for various compounds and species, and the document also mentions AREVA's publications which indicate the actual release levels and state that these levels are within the accepted limits

  17. Web software for the control and management of radiation protection devices in the Cadarache site; Application WEB pour le controle et la gestion des appareils de radioprotection sur le centre de Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    Beltritti, F. [CEA Cadarache 13108 St Paul lez Durance Cedex (France)

    2010-07-01

    This series of slides presents how to use a new software dedicated to the management of the periodical controls that have to be performed on the equipment involved in radiation protection. This software is ready to be dispatched on the CEA site of Cadarache. This software gives information on: the device to be controlled, the controls that have to be performed, the procedures to follow to make the test, the equipment necessary for the test particularly the need for radioactive sources, the maintenance of the device, the previous measurements and in the end the device's conformity. An evaluation of the conformity of all the devices present in a building or an area or of a particular type can be easily obtained. (A.C.)

  18. EPR by Areva. The path of greatest certainty

    International Nuclear Information System (INIS)

    AREVA's Evolutionary Power Reactor (EPR) is the first Generation III+ reactor design currently being built to answer the world's growing demand for clean and reliable electricity generation. Already under construction in Finland, France and China, the EPR is also being considered by America, United Kingdom, South Africa and other countries for the development of their nuclear fleet. The EPR is now clearly destined to become the mainstay of standardized, efficient reactor fleets around the globe. AREVA's EPR incorporates unbeatable know-how provided by an uninterrupted track record of reactor building activities and backed by decades of feedback experience from operating PWRs, including the most recent. The EPR is a Franco-German initiative which benefited from the stringent scrutiny of safety authorities from both countries, at each stage of the project. The EPR has already secured construction licenses from two of the world's most demanding safety authorities in France and Finland and is currently in line for a design certification and a combined construction and operating license (COL) in the USA. It is also taking part in the licensing process recently launched in the United Kingdom. Europe's leading utilities have granted the EPR their approval under the 'European Utilities Requirements' and have further expressed individual interest in the design and performance of the EPR for their businesses. AREVA is the only Gen III+ reactor constructor in the world with ongoing building experience. To date, AREVA is the only vendor who has the necessary field experience that future customers can benefit: - Detailed design completed; - Experience feedback from 87 PWR; - 3 projects going on; - Continuous PWR experience in design and construction. Close to 100% of the EPR primary circuit heavy components are sourced directly from AREVA's integrated plants. Engineering, manufacturing, services and fuel cycle management are totally integrated and mastered by AREVA. From its

  19. 'Action 2016': AREVA's strategic action plan to improve performance

    International Nuclear Information System (INIS)

    On December 12, 2011, Luc Oursel, Executive Officer of AREVA, and Pierre Aubouin, Chief Financial Executive Officer, presented the group's 'Action 2016' strategic action plan based on an in-depth analysis of the market's outlook. This document makes, first, a Detailed presentation of the 'Action 2016' plan and then presents the group's financial outlook: - Full-year 2011 immediate accounting consequences of the new market environment: operating losses expected in 2011; - 2012-2013 transition period Objective: self-finance capex in cumulative terms; - 2014-2016: safe growth and cash generation, free operating cash flow at break-even beginning in 2013, above euro 1 bn per year beginning in 2015

  20. Environmental, social, and corporate report 2009 - Cezus Montreuil- Juigne (Areva)

    International Nuclear Information System (INIS)

    CEZUS, a subsidiary of AREVA, is the global leader in the market for zirconium, the metal used, among other things, for the cladding on fuel assembly tubes. CEZUS's operations are distributed over six sites. The site in Montreuil-Juigne, in western France, pilgers zirconium and titanium alloy tubes and blanks for the fabrication of fuel assembly tubes. This document shows details of the CEZUS Montreuil-Juigne facility and its 2009 initiatives on: consumption and waste management, risk management, environmental and safety management, social and corporate responsibilities

  1. Areva half-year report june 30, 2006

    International Nuclear Information System (INIS)

    This document is the half-year financial report of the Areva group for 2006. It presents: 1 - Highlights of the period; 2 - Key data: Summary data, Segment reporting, Backlog, Income statement, Review by business division, Cash flow, Balance sheet data; 3 - Outlook; 4 - Events subsequent to the half-year end; 5 - Consolidated financial statements: Statutory auditors' report on the interim consolidated financial statements for the period January 1, 2006 to June 30, 2006, Consolidated income statement, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of changes in equity, Segment reporting, Notes to the consolidated financial statements

  2. Areva half-year report June 30, 2008

    International Nuclear Information System (INIS)

    This document is the half-year financial report of the Areva group for 2008. It presents: 1 - the highlights of the period: key data (Summary data, Segment reporting, Backlog, Income statement, Review by division, Cash flow, Balance sheet data); Outlook; 2 - the events subsequent to half-year closing; 3 - the consolidated financial statements: Statutory Auditors' report on half-year 2008 information for the period January 1, 2008 to June 30, 2008, Consolidated income statement, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of change in equity, Segment reporting, Notes to the consolidated financial statements for the period ending June 30, 2008

  3. Research Reactor Business at AREVA TA: Status and Perspectives

    International Nuclear Information System (INIS)

    Research reactors offer essential support for a country's nuclear power generation industry. They have for many years now provided this support in countless ways: They have made it possible to test new developments, to act as the forerunners for pressurised water reactor operations, for qualifying components, training operators as well as allowing the production of radioactive elements for medical or industrial purposes and they have also be used to perform tests on materials. In a word, they have definitively made a difference in our everyday life. For some forty years now, through its various iterations, AREVA TA has taken part in, or led the design and production of more than twenty research reactors and today, within AREVA, has the leading role in energies that generate lower CO2 emissions and in the range of engineering specialties and services offered by the group in this field, alongside CERCA, the world leader in the supply of fuel for research reactors. All of this, in a competitive worldwide market that is more than ever dominated by the need to meet the expectations of the general public. (author)

  4. EPR by Areva. EPR the 1600+ MWe reactor

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This brochure presents the GEN III+ EPR reactor designed by the Areva and Siemens consortium. The EPR reactor is a direct descendent of the well-proven N4 and KONVOI reactors, the most modern reactors in France and Germany. The EPR was designed by teams from KWU/Siemens and Framatome, EDF in France and the major German utilities, working in collaboration with both French and German safety authorities. The EPR integrates the results of decades of R and D programs, in particular those performed by the CEA (French Atomic Energy Commission) and the Karlsruhe Research Center in Germany. The EPR benefits from the experience of several thousand reactor-years of operation of pressurized water reactor technology. This experience has put 87 AREVA PWRs online throughout the world. Innovative Features: - An outer shell covering the reactor building, the spent fuel building and two of the four safeguard buildings provides protection against large commercial or military aircraft crash. - A heavy neutron reflector that surrounds the reactor core lowers uranium consumption. - An axial economizer inside the steam generator allows a high level of steam pressure and therefore high plant efficiency. - A core catcher allows passive collection and retention of the molten core should the reactor vessel fail in the highly unlikely event of a core melt. - A digital technology and a fully computerized control room with an operator friendly man-machine interface improve the reactor protection system.

  5. AREVA invests 610 million euro in new uranium conversion plants

    International Nuclear Information System (INIS)

    AREVA today announced the launch of the Comurhex II project which will see the group build new uranium conversion facilities on the Malvesi site in Narbonne and Tricastin. Through this 610 million euro investment, AREVA aims to maintain its position as world no. 1 for conversion within a context of global nuclear energy. COMURHEX II integrates technological innovations from major R and D programs and return of experience from processes in operation for over forty years. Nuclear safety and reducing the impact on the environment were top priorities when designing the project. These future facilities will also lead to major savings of water and energy consumption and reduce effluents. The groundwork of the Comurhex II project has taken 150,000 hours of engineering over the past three years. Four hundred people will work on the site which will be launched in summer 2007. First industrial production is scheduled for 2012, based on 15,000 metric tons of uranium per year. This figure may be increased to 21,000 tons to meet market requirements

  6. SIGNIFICANT NATURAL HERITAGE AREAS (NC)

    Science.gov (United States)

    The North Carolina Department of Environment and Natural Resources, Division of Parks and Recreation, Natural Heritage Program in cooperation with the NC Center for Geographic Information & Analysis, developed the Significant Natural Heritage Areas digital data to determine the a...

  7. Areva half-year report june 30, 2007

    International Nuclear Information System (INIS)

    Information provided in this document concerns the AREVA group as a whole. It presents the highlights and Key data of the first half of 2007, the outlook, the events subsequent to half-year closing, and the Consolidated financial statements. Contents: 1 - Highlights of the period; 2 - Key data: Summary data, Segment reporting, Backlog, Income statement, Review by division, Cash flow, Balance sheet data; 3 - Outlook; 4 - Events subsequent to half-year closing; 5 - Consolidated financial statements: Statutory Auditors' report on half-year information for the period January 1, 2007 to June 30, 2007, Consolidated income statement, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of change in equity, Segment reporting, Notes to the consolidated financial statements for the period ending June 30, 2007

  8. An effective and sustainable D&D concept. Competencies and experiences of AREVA

    International Nuclear Information System (INIS)

    Business Unit created in 2008 to manage nuclear sites dismantling projects for AREVA and external clients through: Assistance during post-closure phase /deregulation; D&D planning and assistance; Project- and Site-Management; Decontamination; Dismantling; Waste management

  9. 75 FR 62895 - Notice of Availability of Safety Evaluation Report; AREVA Enrichment Services LLC, Eagle Rock...

    Science.gov (United States)

    2010-10-13

    ... criticality safety, chemical process safety, fire safety, emergency management, environmental protection... COMMISSION Notice of Availability of Safety Evaluation Report; AREVA Enrichment Services LLC, Eagle Rock... of availability of safety evaluation report. FOR FURTHER INFORMATION CONTACT: Breeda Reilly,...

  10. AREVA: Operating performance shows distinct improvement; Results heavily impacted by the cost of remedial measures

    International Nuclear Information System (INIS)

    The 2015 results illustrate the progress AREVA made in 2015 and open up favorable prospects for 2016 and the following years in view of its fundamentals. The group's competitiveness plan had a very positive impact on its costs and cash, despite the heavy net loss situation which continues and in a market environment that remained difficult in 2015. Half of this loss of 2 billion Euro is due to additional provisions for OL3 and half to provisions for restructuring and impairment related to market conditions. Concerning the group's liquidity, 2016 is funded and the capital increase which will be launched in the coming months will enable AREVA to gradually regain the group's positive profile. A new phase awaits the Group in 2016 with clarity and confidence in the implementation of the restructuring announced in 2015 and in particular the autonomy of AREVA NP and the creation of New AREVA

  11. The nuclear data, A key component for reactor studies, Overview of AREVA NP needs and applications

    Directory of Open Access Journals (Sweden)

    Ravaux Simon

    2016-01-01

    Full Text Available The quality of the nuclear data is essential for AREVA NP. Indeed, many AREVA NP activities such as reactor design, safety studies or reactor instrumentation use them as input data. So, the nuclear data can be considered as a key element for AREVA NP. REVA NP’s contribution in the improvement of the nuclear data consists in a joint effort with the CEA. It means a financing and a sharing of information which can give an orientation to the future research axis. The aim of this article is to present the industrial point of view from AREVA NP on the research on nuclear data. Several examples of collaborations with the CEA which have resulted in an improvement of the nuclear data are presented.

  12. Teach NC Basics Step by Step.

    Science.gov (United States)

    Schroeder, Roger

    1978-01-01

    Rapid expansion of numerical control (NC) machining in industry has created the need for inclusion of NC basic concepts in the industrial education curriculum. The author describes an NC unit in an industrial technology class and the program sheet and NC worksheet that he developed for machining a product. (MF)

  13. Transmission and Distribution: AREVA takes further action to reinforce its presence in China

    International Nuclear Information System (INIS)

    Following the recent opening of its new gas-insulated switchgear factory last month in Suzhou, China, AREVA's Transmission and Distribution (T and D) division has announced additional actions to increase its market share in the country. The division has just signed an agreement to form a 50/50 joint venture with the Chinese company, Sunten Electric Co. Ltd., a leading manufacturer of distribution transformers, whose 2006 annual sales reached circa euro 120 million. Through this joint venture, AREVA T and D will become No 1 in China for dry-type transformers, Sunten Electric Co. Ltd.'s specialization. AREVA T and D has also established a partnership with the China Electric Power Research Institute (C-EPRI), a leading Chinese organization specialized in electrical technologies. Under the agreement, C-EPRI will be the official licensee for AREVA T and D's H-400 high-voltage direct current (HVDC) Thyristor valves in China. The partnership will enable AREVA T and D to enter the fast-growing domestic HVDC market. The T and D sector in China represents 24% of the worldwide transmission and distribution market. AREVA T and D's turnover in China, where demand for T and D equipment is growing strongly, should significantly contribute to the division's objective to reach euro 5 billion in sales by 2010

  14. AREVA announces US$ 7.75 Per share friendly cash offer for UraMin

    International Nuclear Information System (INIS)

    AREVA and UraMin Inc. ('UraMin') entered on June 15, 2007 into an agreement in respect of AREVA's friendly cash offer for 100% of the share capital of UraMin. UraMin is listed in London (AIM) and Toronto (TSX). AREVA (Euronext Paris) already owns 5.5% of UraMin's share capital. This cash offer of AREVA will be made through its indirect wholly-owned subsidiary CFMM Development ('AREVA') based on a price of US$ 7.75 per UraMin share. The total offer consideration amounts to more than USD 2.5 billion for 100% of the fully diluted share capital of UraMin. This represents a premium of 21% over UraMin 20-day weighted average trading price ending on June 8, 2007. The UraMin Board of Directors, after consulting with its financial advisors, has determined that the offer is fair and in the best interest of the UraMin shareholders and it has resolved to recommend acceptance of the Offer. BMO Capital Markets has provided an opinion that the offer is fair, from a financial point of view, to the UraMin shareholders. In connection with the offer, all directors and certain other shareholders representing approximately 25% of the outstanding UraMin shares (calculated on a fully diluted basis) have entered into lock-up agreements with AREVA pursuant to which they have agreed to tender all their UraMin shares to AREVA's offer. The support agreement entered into between AREVA and UraMin provides for, among other things, in case a superior proposal is accepted by UraMin, a right to match in favour of AREVA. The support agreement also includes a break up fee in favour of AREVA of US$ 75 million under certain circumstances. Concurrently with the closing of the proposed offer, UraMin will declare a dividend payable in shares of the capital of Niger Uranium Limited held by UraMin (where permitted by law) or a cash equivalent of the value of such shares

  15. AREVA. Operating and financial results for the first half of 2011; AREVA. Resultats du 1er semestre 2011

    Energy Technology Data Exchange (ETDEWEB)

    Marie, Patricia; Briand, Pauline; Floquet-Daubigeon, Fleur; Michaut, Maxime; De Scorbiac, Marie

    2011-07-27

    The first half of 2011 was marked by the accident at the Fukushima power plant following the unprecedented natural disasters that struck Japan. AREVA drew the first consequences from these events as early as June 2011 and recorded provisions and impairment in its half-year financial statements, related in particular to the expected short-term level of activity of some facilities. Close to 200 million euros in orders were canceled out of a total in backlog of more than 43 billion euros, which was down by a little more than 1 billion euros compared with the end of 2010. The longer term consequences of these events for AREVA are being assessed. They could concern all operations in the nuclear cycle and will be included in the strategic plan to be prepared by the end of the second half of the year. The fundamentals underpinning the development of the nuclear market are unchanged: strong growth in demand for electricity in the coming decades, diminished fossil resources, the search by many countries for energy independence, and the growing need to address climate issues. Through its efficient integrated business model, AREVA is present in every segment of the nuclear chain and is positioned in high-tech renewable energies with an offering that is perfectly suited to the requirements of the world's power companies. Decisions by governments on energy policy and by the safety authorities in different countries will influence market developments and the schedule for executing certain projects. Germany announced its decision to withdraw permanently from nuclear power and Switzerland intends to do the same, while Italy has opted not to restart its program. And yet the majority of countries have confirmed their decision to pursue nuclear power programs, present and future. In the first half, the group continued to draw down debt, achieving a net debt level of less than 3 billion euros at the end of June, thanks in particular to the conclusion of the proceedings with

  16. Areva - Half year financial report June 30, 2009

    International Nuclear Information System (INIS)

    This half-year financial report contains statements on the objectives, prospects and growth areas for the AREVA group. It gives a view of the net worth, the financial position and the income of the company and all the companies included in consolidation. It presents the major events that occurred during the first six months of the fiscal year, of their effect on the financial statements and of the main transactions between related parties. It gives a description of the main risks and main uncertainties for the remaining six months of the financial year. Content: 1 - Half-year business report: Significant events, Summary data, Segment reporting, Backlog, Income statement, Review by division, Cash flow, Balance sheet items, Events subsequent to closing, Outlook; 2 - Statutory auditors' report on the financial information for the 2009 half-year - period January 1 to June 30, 2009: Condensed consolidated financial statements at June 30, 2009, Consolidated income statement, Consolidated comprehensive income, Consolidated balance sheet, Consolidated cash flow statement, Consolidated statement of changes in equity, Segment reporting, Notes to the consolidated financial statements for the period ending June 30, 2009

  17. Areva 2007 results: accelerated growth and significantly improved profitability; Areva resultats 2007: acceleration de la croissance et hausse significative de la profitabilite

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-02-15

    The AREVA group recorded accelerated growth and increased profitability in 2007, meeting both of its objectives for the year. The group made strategic inroads in fast growing markets. AREVA's integrated model met with record success in China, where GGNPC acquired two EPR nuclear islands in a combined order including both the reactors and the fuel, and the creation of a joint venture in engineering. Its T and D division was awarded the largest contract of its history in Qatar, making it the leader in a region where T and D was not even present a few years ago. For more than three years, AREVA has built up its capacity to meet surging demand in the nuclear power and T and D markets through an active policy of research and development and by capitalizing on the diversity and strength of its partnerships. Areva hired 8,600 people in 2006 and 11,500 people in 2007; this represents an investment in recruitment, training and integration of approximately euro 200 million per year. For 2008, the group foresees a further increase in its backlog, sales revenue and operating income. The Areva Group financial statements for 2007 are summarized below: - Backlog: euro 39.8 billion, up 55%; - Sales revenue: euro 11.9 billion, up 9.8% (up 10.4% like-for-like); - Operating income: euro 751 million, i.e. 6.3% operating margin, up 2.6 points compared with 2006; - Net income attributable to equity holders of the parent: euro 743 million (euro 20.95 per share), up from euro 649 million in 2006 (euro 18.31 per share); - Net debt: euro 1.954 billion, linked to the acquisition of UraMin; - Dividend: euro 6.77, to be proposed to the Annual General Meeting of Shareholders convening on April 17, 2008.

  18. AREVA - 2012 annual results: significant turnaround in performance one year after launching the Action 2016 plan

    International Nuclear Information System (INIS)

    One year after launching Areva's Action 2016 strategic plan, the first results are in. AREVA is ahead of schedule in executing its recovery plan. While pursuing its efforts in the management of a few difficult projects (such as OL3), Areva group was able to return to a virtuous performance cycle rooted in strong growth in nuclear order intake and good progress on its cost reduction program. Commercially, despite the difficult economic environment, AREVA was able to capitalize on its leadership in the installed base and on its long-term partnerships with strategic customers, beginning with EDF, with which AREVA renewed a confident and constructive working relationship. Areva has secured 80% of its objective of one billion euros of savings by the end of 2015 to improve its competitiveness. The group also continued efforts to optimize working capital requirement and control the capital expenditure trajectory. Together, these results enabled AREVA to exceed the objectives set for 2012 for two key indicators of its strategic plan: EBITDA and free operating cash flow. Nearly 60% of the 2.1 billion euros devoted to capital expenditures for future growth in 2012 were funded by operations, a quasi-doubled share compared to 2011. Areva's floor target for asset disposals was achieved one year ahead of schedule, also helping the Group to control its net debt, which remained below 4 billion euros. In 2013, Areva is continuing to implement the Action 2016 plan to keep its turnaround on track. In summary: - Backlog renewed over the year 2012 to euro 45.4 bn thanks to the increase in nuclear order intake; - Sales revenue growth: euro 9.342 bn (+5.3% vs. 2011), led by nuclear and renewables operations; - Very sharp upturn in EBITDA: euro 1.007 bn (+euro 586 m vs. 2011) - Very net improvement in free operating cash flow: -euro 854 m (+euro 512 m vs. 2011); - Back to positive reported operating income: euro 118 m (+euro 1.984 bn vs. 2011); - 2012-2013 floor target for asset disposals

  19. Recent developments in post-irradiation examination techniques for water reactor fuel. Proceedings of a technical committee meeting held in Cadarache, France, 17-21 October 1994

    International Nuclear Information System (INIS)

    At the invitation of the Government of France, following a proposal of the International Working Group on Water Reactor Fuel Performance and Technology (IWGFPT) the IAEA convened a Technical Committee meeting from 14 to 21 October 1994 in Cadarache to discuss recent technical advances and improvements in the field of post-irradiation examination (PIE) of fuel used in nuclear power plants. Fifty participants representing 14 countries attended the meeting and 30 papers were presented and discussed during five technical sessions. Working Groups composed of the session chairmen and authors of papers prepared summaries of each session including conclusions and recommendations for future work. Refs, figs and tabs

  20. Our energies have a future. A future without CO2. Areva in 2005

    International Nuclear Information System (INIS)

    This document is the sustainable development and 2005 annual report altogether of Areva group. It presents first the challenges of energy for economical development, the climate change threat and the sustainability of nuclear power in particular with respect to radioactive wastes management and power blackouts. Then follows a presentation of Areva's 10 commitments for sustainable development (governance and continuous improvement, financial performance, innovation, customer satisfaction, commitment to employees, risk management and prevention, environmental protection, dialogue and consensus building, community involvement). The annual report presents: the 2005 highlights, Areva around the world, key data, corporate governance, organisation of the group, share information and shareholder relations, business review (front end division, reactors and services division, back end division, transmission and distribution division), financial report and glossary. (J.S.)

  1. Annual report 2014. Report on subcontracting within the AREVA group in France

    International Nuclear Information System (INIS)

    This report presents quantitative data and actions undertaken by the AREVA group regarding subcontracting in its nuclear activities in France in 2014. After a presentation of AREVA, it addresses innovative practices in the 'commissioner-supplier' relationship, describes how the subcontracting option corresponds to an industrial choice, describes how subcontracting is supervised through an operational acquisition process, how abilities and training of external interveners are controlled, how operations performed by external interveners are prepared and accompanied. It outlines how issues related to health, safety and security are addressed exactly the same way for all interveners, and finally comments how observations made by the different stakeholders are sources of progress

  2. Press kit. Cooperation between Areva and South Africa in the nuclear energy field

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    This document presents the nuclear industry business developed by Areva in South Africa. The first part offers general information on the country (political context, economy which fuels African growth, social situation and South Africa in search of sustainable development). An other part deals with the electricity supply (predominance of coal and the issue of global warming, electricity for everyone. The last parts detail the nuclear energy development (the new PBMR reactor project, the exploitation of all nuclear technology) and how Areva consolidates its presence in South Africa. (A.L.B.)

  3. Press kit. Cooperation between Areva and South Africa in the nuclear energy field

    International Nuclear Information System (INIS)

    This document presents the nuclear industry business developed by Areva in South Africa. The first part offers general information on the country (political context, economy which fuels African growth, social situation and South Africa in search of sustainable development). An other part deals with the electricity supply (predominance of coal and the issue of global warming, electricity for everyone. The last parts detail the nuclear energy development (the new PBMR reactor project, the exploitation of all nuclear technology) and how Areva consolidates its presence in South Africa. (A.L.B.)

  4. Areva T and D market opportunities after the US and EU Blackouts

    International Nuclear Information System (INIS)

    This document presents the events on the transmission systems during August 2003 in Usa and in September 2003 in Italy. The author analyzes the causes of the blackouts (small margins in transmission system, not adequate control, weaknesses in interconnections between regions), the market opportunity arising out of the blackouts, the economic regulatory and environmental structure/issues today and developments, the scenario for Areva after the blackout (the market size today and in the future) and Areva strength in relation to blackout. (A.L.B.) opportunities

  5. Areva. Nine-month 2007 sales revenue and data; Areva. Informations et chiffre d'affaires relatifs au neuf premiers mois de l'exercice 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-10-15

    The main information concerning the nine-month 2007 financial data of the Areva group is a steady growth of 9-month sales revenue, at euro 8.066 billion (+6.8% like-for-like), including euro 2.692 billion in the 3. quarter, i.e. +7.6% like-for-like. The group confirms its strong sales revenue growth objective for 2007.

  6. Investments in new nuclear fuel cycle facilities. AREVA long term supply insurance approach

    International Nuclear Information System (INIS)

    As a leading provider of technological solutions for nuclear power generation and electricity transmission, the AREVA group and its partners can offer a unique range of products and services from one single step to a fully integrated fuel supply, as requested by its customers. At the core of AREVA, the Front end division is an essential part of the overall fuel supply chain. To address its customers' needs for their existing and future nuclear power plants, the AREVA group has already launched and is further planning very significant investments to build new facilities in the front end, based on the most advanced technologies: - in conversion: the Comurhex 2 project is now approved and started. - in enrichment: our 3 billion euros GB II centrifuge plants project is well on its construction schedule, now allowing us to start a project in the USA based upon the same design. - We are also investing in fuel fabrication at our existing plants in Europe and in the US. Current uranium market evolutions put natural uranium supply under pressure: we are also investing in mining, - Canada, Kazakhstan, Niger, Namibia, South Africa, etc - and also in exploration. Because AREVA is convinced of a fast growing future for nuclear power generation, it has proactively opted to massively invest in the fuel cycle facilities of the 21st century in order to be prepared to fulfil its customer needs. (author)

  7. 76 FR 9054 - Notice of Availability of Final Environmental Impact Statement for the AREVA Enrichment Services...

    Science.gov (United States)

    2011-02-16

    ... commercial nuclear power reactors. In the Final EIS, the NRC staff assessed the potential environmental... COMMISSION Notice of Availability of Final Environmental Impact Statement for the AREVA Enrichment Services... Commission. ACTION: Notice of Availability of Final Environmental Impact Statement. SUMMARY: Notice is...

  8. Developing talent at AREVA: Investing in people and building our future

    Energy Technology Data Exchange (ETDEWEB)

    Vivien, Philippe [Human Resources AREVA (France)

    2008-07-01

    AREVA employs 65,000 people today and will recruit 12,000 new employees worldwide in 2008 to support business strategy. The group forecasts that recruitment needs will significantly rise to 40,000 by 2012, representing 50% of the workforce. In order to meet the challenges of rapid international expansion and a highly competitive talent market, AREVA has developed initiatives to accelerate its investment in people, to reinforce recruitment and retain high quality talents and valuable skills and knowledge. The group human resources department's mission is based on shaping talents for sustainable business performance. It established its five-point human resources policy, Talent Builder, to attract, develop, retain, reward and mobilize employees across all businesses. In the context of a global talent market, dynamic recruitment programs are implemented to attract top talent. A global Campus Management program builds on relationships with colleges and universities to attract the future generation of engineers and managers. Talent development initiatives include processes and management tools, such as the People Review to identify and nurture key skills and talents, a group-wide integration program, professional training, and priority to internal mobility. AREVA places particular importance to diversity, a keystone of HR policy, and a socio-economic lever of development. The rich variety of people and cultures in the group reflect the markets, customers and the civil society in which AREVA operates. The group is actively committed to equal opportunities for all. The European agreement on equal opportunities in the workplace sets out measures for promoting gender equality and professional career paths, with the principal themes of recruitment, career development, training, remuneration and parental support. In addition, the WE network of men and women was set up with the support of Anne Lauvergeon, Chief Executive of AREVA with the objectives of promoting gender

  9. Developing talent at AREVA: Investing in people and building our future

    International Nuclear Information System (INIS)

    AREVA employs 65,000 people today and will recruit 12,000 new employees worldwide in 2008 to support business strategy. The group forecasts that recruitment needs will significantly rise to 40,000 by 2012, representing 50% of the workforce. In order to meet the challenges of rapid international expansion and a highly competitive talent market, AREVA has developed initiatives to accelerate its investment in people, to reinforce recruitment and retain high quality talents and valuable skills and knowledge. The group human resources department's mission is based on shaping talents for sustainable business performance. It established its five-point human resources policy, Talent Builder, to attract, develop, retain, reward and mobilize employees across all businesses. In the context of a global talent market, dynamic recruitment programs are implemented to attract top talent. A global Campus Management program builds on relationships with colleges and universities to attract the future generation of engineers and managers. Talent development initiatives include processes and management tools, such as the People Review to identify and nurture key skills and talents, a group-wide integration program, professional training, and priority to internal mobility. AREVA places particular importance to diversity, a keystone of HR policy, and a socio-economic lever of development. The rich variety of people and cultures in the group reflect the markets, customers and the civil society in which AREVA operates. The group is actively committed to equal opportunities for all. The European agreement on equal opportunities in the workplace sets out measures for promoting gender equality and professional career paths, with the principal themes of recruitment, career development, training, remuneration and parental support. In addition, the WE network of men and women was set up with the support of Anne Lauvergeon, Chief Executive of AREVA with the objectives of promoting gender equality

  10. AREVA's fuel assemblies addressing high performance requirements of the worldwide PWR fleet

    International Nuclear Information System (INIS)

    Taking advantage of its presence in the fuel activities since the start of commercial nuclear worldwide operation, AREVA is continuing to support the customers with the priority on reliability, to: >participate in plant operational performance for the in core fuel reliability, the Zero Tolerance for Failure ZTF as a continuous improvement target and the minimisation of manufacturing/quality troubles, >guarantee the supply chain a proven product stability and continuous availability, >support performance improvements with proven design and technology for fuel management updating and cycle cost optimization, >support licensing assessments for fuel assembly and reloads, data/methodologies/services, >meet regulatory challenges regarding new phenomena, addressing emergent performance issues and emerging industry challenges for changing operating regimes. This capacity is based on supplies by AREVA accumulating very large experience both in manufacturing and in plant operation, which is demonstrated by: >manufacturing location in 4 countries including 9 fuel factories in USA, Germany, Belgium and France. Up to now about 120,000 fuel assemblies and 8,000 RCCA have been released to PWR nuclear countries, from AREVA European factories, >irradiation performed or in progress in about half of PWR world wide nuclear plants. Our optimum performances cover rod burn ups of to 82GWD/tU and fuel assemblies successfully operated under various world wide fuel management types. AREVA's experience, which is the largest in the world, has the extensive support of the well known fuel components such as the M5'TM'cladding, the MONOBLOC'TM'guide tube, the HTP'TM' and HMP'TM' structure components and the comprehensive services brought in engineering, irradiation and post irradiation fields. All of AREVA's fuel knowledge is devoted to extend the definition of fuel reliability to cover the whole scope of fuel vendor support. Our Top Reliability and Quality provide customers with continuous

  11. Areva 2009 responsible growth report: more energy, less CO{sub 2}; Areva rapport de croissance responsable 2009: plus d'energie moins de CO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    This document is the 2009 annual responsible growth report of AREVA which presents itself as having consolidated its leadership position in its original business of nuclear power while expanding considerably in renewable energies (wind, solar, bio-energies and hydrogen/storage) to become a leading provider of solutions for carbon-free power generation. The main chapters of the report are: the group and its strategy, Areva's nuclear power solutions (is nuclear a sustainable energy source?, supply, technological excellence, safety, recycling and waste, acceptability, non-proliferation), Areva's renewable energy solutions (how much of the energy mix should be renewable?, rising demand, competitiveness and efficiency, responsible development), Areva's human resources (gender balance, health and safety, diversity and opportunity, hiring and training). Data and balanced scorecard for sustainable development are also given

  12. AREVA ''Sustainable Cycle Solutions''

    International Nuclear Information System (INIS)

    capabilities are on track to expand in some countries there will be a growing need, to move forward efficiently, to smartly mix proven and evolving solutions (recycling, on site dry storage, pools, centralized storage, advanced technologies). These shall be combined in an optimized manner taking into account key criteria related to non proliferation, minimization of environmental impact, economics, fleet performance, responsibility towards future generations... The recommendations from Safety Authorities to deepen the question of very long term dry storage have also reactivated the debate about the available options for the short and long terms, including recycling, which is therefore likely to play an increasing role, especially if flexibility is required to ensure a cost-effective fast reactor ramp-up. Such an approach is aimed at meeting needs that may differ, even diverge depending on the concerned stakeholders. The paper will in particular illustrate how AREVA 'Sustainable Cycle Solutions' may optimize fuel cycle schemes for the short and longer terms and fulfill the stakeholders' needs. It will also pinpoint the related limits and conditions that have to be met to fulfill the above mentioned criteria. (author)

  13. The CEA Cadarache site. Additional safety assessment with respect to the accident which occurred in the Fukushima-Daiichi nuclear power station

    International Nuclear Information System (INIS)

    After a presentation of some characteristics of the CEA Cadarache site (internal and external industrial environment, crisis management organization at the CEA level and at the local level), this document reports the identification of structures and equipment concerned by crisis management (site support functions, critical structures and equipment concerned by additional safety assessments). Then, it addresses the different risks: earthquake (sizing of critical structures and equipment, margin assessment), flooding (possible origins, alarm measures), other extreme natural events (extreme meteorological conditions, extreme earthquake with induced flooding, forest fire), and loss of electric supplies and of cooling systems. The last parts address the organization of accident management in situation typically related to additional safety management), and subcontracting conditions and practices

  14. Hemisphere jet mass distribution at finite Nc

    Directory of Open Access Journals (Sweden)

    Yoshikazu Hagiwara

    2016-05-01

    Full Text Available We perform the leading logarithmic resummation of nonglobal logarithms for the single-hemisphere jet mass distribution in e+e− annihilation including the finite-Nc corrections. The result is compared with the previous all-order result in the large-Nc limit as well as fixed-order perturbative calculations.

  15. Mammalian Mitochondrial ncRNA Database

    OpenAIRE

    Anandakumar, Shanmugam; Vijayakumar, Saravanan; Arumugam, Nagarajan; Gromiha, M. Michael

    2015-01-01

    Mammalian Mitochondrial ncRNA is a web-based database, which provides specific information on non-coding RNA in mammals. This database includes easy searching, comparing with BLAST and retrieving information on predicted structure and its function about mammalian ncRNAs. Availability The database is available for free at http://www.iitm.ac.in/bioinfo/mmndb/

  16. Areva new fuel designs; increased reliability, operating margins and operating efficiency; Nuevos disenos de combustible Areva: aumento de fiabilidad, margenes operativos y eficiencia del funcionamiento

    Energy Technology Data Exchange (ETDEWEB)

    Mollard, P.; Vollmer, N.; Curca-Tivig, F.; Cole, S.; Louf, H. P.

    2015-07-01

    AREVA is continuously working on the improvement of the fuel design to address immediate and future needs of the utilities. This improvement process regularly leads to incremental changes but also to breakthrough changes addressing the next needs of the market. Since a few years now, the improvements of the fuel design and licensing benefit from the improvement and upgrade in codes and methods and computational capabilities. Changes in design are sustained by these more powerful and phenomenological tools which secure and fasten the fuel design optimization and its implementation. (Author)

  17. EPR construction at China's Taishan progressing well, Says Areva

    Energy Technology Data Exchange (ETDEWEB)

    Mitev, Lubomir [NucNet, Brussels (Belgium)

    2014-04-15

    Construction of two EPR units at the Taishan nuclear site in China's southern Guangdong province is 'progressing well', with 95 percent of procurement orders placed and 82 percent of engineering work completed, Areva has said. All primary heavy components have been delivered and installed for the first unit, Taishan-1, and the delivery of heavy components for Taishan-2 is under way. Areva is nuclear island supplier for the two 1,600 MW units. Its customer is the China Guangdong Nuclear Power Holding Corporation (CGNPC), represented by the Taishan Nuclear Power Company (TNPJVC). TNPJVC is a joint venture between CGNPC and France's EDF. Negotiations for Taishan-3 and -4 are expected to restart soon following the suspension of new-build authorisations after the Fukushima-Daiichi accident in March 2011. China plans to have 58,000 MW of installed nuclear capacity. (orig.)

  18. Concept and operational experience of the Areva DMT process for preventive maintenance of steam generators

    International Nuclear Information System (INIS)

    The AREVAs DMT process is a preventive chemical cleaning of the steam generators (SG) that provides the required features to keep the SG in good operative conditions. -Very low carbon steel corrosion -Innocuous towards stainless steel and nickel base alloys -Inherently safe process -Efficient magnetite dissolution -No use of CMR (i.e Carcinogenic, Mutagenic and toxic to Reproduction) Chemicals (e. g. Hydrazine) -No ammonia emissions -Easy decomposition of waste Several applications have been performed world-wide over the last 5 years. The results were fully satisfying in all the above stated points. The removal of up to 800 kg of dry deposits per SG was realized. A positive effect on fouling factor was observed, showing that AREVAs DMT process is a safe, easy and successful way to maintain the steam generators in excellent operative conditions. (Author)

  19. MFFF project in Savannah River: AREVA's role in the project - construction status

    International Nuclear Information System (INIS)

    Within the framework of a bilateral agreement between the USA and the Russian federation during the 90s (Start agreement), both parties decided to eliminate 34 metric tons of surplus weapon-grade plutonium each. On the American side, the Department of Energy (DOE) is in charge of implementing the agreement. In 1999, the DOE signed a contract with DCS (Duke, Cogema, Stone and Webster), to design, build and operate a facility, MFFF, that would transform the American weapon-grade plutonium in MOX fuel. This plant, located in Savannah River in South Carolina, will fabricate civil fuel to be loaded in existing US commercial reactors. AREVA signed technology transfer with the DOE, allowing MFFF to be an US copy of AREVA's fuel recycling facilities (La Hague for material purification and MELOX for fuel fabrication). 10 years after the signing of the initial agreement, project is now a reality. Shaw AREVA MOX services, that succeeded to the former DCS, undertook building the MFFF plant the 1. of August 2007. Process equipments are being achieved and testing has begun. From the beginning of the project, AREVA mobilized the best of its expertise to ensure its success. Engineering and operating teams integrate their experience of recycling technologies in the SA MOX Project to carry out the technology transfer. The presentation will trace history of the project and set various stages from its beginning. It will focus on the progress of construction and develop the last prospects of the project. A first feedback of the execution of the technology transfer from France to the USA will be presented. (authors)

  20. First half 2006 financial results; Resultats du 1er semestre 2006 Groupe Areva

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-09-15

    Areva provides technological solutions for highly reliable nuclear power generation and electricity transmission and distribution. The group is the world leader in nuclear power and the only company to cover all industrial activities in this field. This Press release presents the first half 2006 financial results: the overall performance and the performance by division (front end, reactors and services, back end, transmission and distribution). (A.L.B.)

  1. Does multinationals socially responsible in Sub-Sahara Africa? Case of AREVA in Niger

    OpenAIRE

    Youssoufou, Hamadou Daouda

    2014-01-01

    Societal actions in terms of CSR of the French nuclear group in Niger contrast with stakeholders charges against him (pollution, degradation of the environment, groundwater contamination, etc.) and certain realities observed on the field (armed conflict, poverty, social inequalities, disintegration of the local economy). This paper proposes to shed light on the issues and controversies related to the practice of CSR in Africa in general, those related to Areva group in Niger in...

  2. Areva, Chalon/St-Marcel site, Environment, social and societal report for 2010-2011

    International Nuclear Information System (INIS)

    After a brief indication of Areva's activities and a map locating Areva's implantations, and the distribution of turnover and personnel in the different continents, a brief recall of safety commitments, and a presentation of the activity of the Reactors and Services Business Group (turnover, personnel, number of reactors in charge), this report briefly presents the different AREVA sites in Burgundy, and more precisely the Chalon/St-Marcel site which comprises a technical centre and a plant of production of heavy components. The activities of the technical centre concern welding technology, nuclear fusion, corrosion and chemistry, fluid and structure mechanics, and technologies related to the development of new energies and to the environment. Fields of intervention and clients are evoked. The activity of the plant of production of heavy components (vapor generators, pressurizers, vessels, etc.) and some characteristics of these components are presented. The environmental aspect is then addressed: evolution of resource consumption (gas, water, electricity, paper), and of releases (greenhouse gases, used waters, waste management). The social aspect comprises social relationships, health (involved actors, prevention, safety, evolution of labour accidents), ability and job management (training, career management, education). The societal commitments have been acknowledged by several labels related to social inclusion and local activities, support of sporting and cultural activities

  3. Areva - 2013 annual results: breakeven free operating cash flow objective reached despite a difficult environment

    International Nuclear Information System (INIS)

    The Areva group reached a major milestone in 2013 in turning performance around by meeting a key objective of its Action 2016 plan: the return to breakeven of free operating cash flow. For the first time since 2005, cash generated by the Group's operations allowed it to fully fund strategic capital expenditures essential to the group's profitable growth. To achieve this result, Areva built on robust growth in nuclear operations, on contributions from its cost reduction plan and on strict management of capital spending. However, two projects launched in the previous decade (OL3 and a power plant modernization) and the Renewable Energies business impacted negatively the group's 2013 net income. On the Renewable Energies market, in a situation marked by a reduction of capital spending by customers, AREVA anticipated the consolidation required in the sector by implementing industrial partnerships such as the joint venture project with Gamesa, which aims to create a European champion in offshore wind. Similar initiatives were undertaken in solar energy and energy storage. The Group continues to implement the Action 2016 plan to pursue its recovery. While the economic environment remains uncertain and projects launched in the previous decade remain a burden, the Group forecasts further performance improvement and significant growth in cash flow generation by the end of the plan

  4. Waste Estimates for a Future Recycling Plant in the US Based Upon AREVA Operating Experience - 13206

    Energy Technology Data Exchange (ETDEWEB)

    Foare, Genevieve; Meze, Florian [AREVA E and P, SGN - 1, rue des Herons, 78182 Montigny-le-Bretonneux (France); Bader, Sven; McGee, Don; Murray, Paul [AREVA Federal Services LLC, 7207 IBM Drive, Mail Code CLT- 1D, Charlotte NC 28262 (United States); Prud' homme, Pascal [AREVA NC SA - 1, place Jean Millier, 92084 Paris La Defense CEDEX (France)

    2013-07-01

    Estimates of process and secondary wastes produced by a recycling plant built in the U.S., which is composed of a used nuclear fuel (UNF) reprocessing facility and a mixed oxide (MOX) fuel fabrication facility, are performed as part of a U.S. Department of Energy (DOE) sponsored study [1]. In this study, a set of common inputs, assumptions, and constraints were identified to allow for comparison of these wastes between different industrial teams. AREVA produced a model of a reprocessing facility, an associated fuel fabrication facility, and waste treatment facilities to develop the results for this study. These facilities were divided into a number of discrete functional areas for which inlet and outlet flow streams were clearly identified to allow for an accurate determination of the radionuclide balance throughout the facility and the waste streams. AREVA relied primarily on its decades of experience and feedback from its La Hague (reprocessing) and MELOX (MOX fuel fabrication) commercial operating facilities in France to support this assessment. However, to perform these estimates for a U.S. facility with different regulatory requirements and to take advantage of some technological advancements, such as in the potential treatment of off-gases, some deviations from this experience were necessary. A summary of AREVA's approach and results for the recycling of 800 metric tonnes of initial heavy metal (MTIHM) of LWR UNF per year into MOX fuel under the assumptions and constraints identified for this DOE study are presented. (authors)

  5. Participation in the IAEA Coordinated Research Project Fumex III: Final Report of AREVA NP

    International Nuclear Information System (INIS)

    After the Coordinated Research Project (CRP) FUMEXII, participants asked for a new exercise within an IAEA CRP. This CRP started in December 2008 in Vienna with the first Research Coordination Meeting (RCM). The CRP is titled ''Improvement of Computer Codes Used for Fuel Behaviour Simulation FUMEX III''. The object of FUMEX III were the improvement of fuel rod performance codes for modeling high burnup phenomena in modern fuel. This includes transient behavior, as well as mechanical interaction between pellet and cladding and, in progression to the FUMEX II exercise, fission gas release during various conditions (steady state, load follow, transient). AREVA NP agreed on participating in this exercise under the IAEA research agreement no. 15369 and expressed interest in the modeling of pelletclad mechanical interactions as well as fission gas release under steady state and transient conditions. In this exercise AREVA NP used its new global fuel rod code GALILEO, which is still under development (formerly known under the project name COPERNIC 3). During a Consultants Meeting potential topics and a proposed selection of cases have been prepared, which were discussed during the 1st Research Coordination Meeting (RCM) in Vienna in December 2008. During the discussions a number of additional cases motivated by the participants have been identified. Finally, a case table has been agreed upon, which included several cases for the different topics. Most of the cases have been based on the International Fuel Performance Experiments (IFPE) database, but additional cases have been provided during the exercise (e.g., the AREVA idealized case

  6. EnviroAtlas - Durham, NC - Demo (Parent)

    Data.gov (United States)

    U.S. Environmental Protection Agency — This EnviroAtlas dataset is the base layer for the Durham, NC EnviroAtlas Area. The block groups are from the US Census Bureau and are included/excluded based on...

  7. Treatment of Fukushima contaminated waters TEPCO selected Areva and Veolia solution

    International Nuclear Information System (INIS)

    The Actiflo-RadTM system successfully contributed to treat the contaminated wastewaters from the damaged Fukushima Daiichi nuclear power plant. The decontamination system jointly designed by AREVA and Veolia Water treated about 77 500 m3 of high activity wastewater (∼106 Bq/cm3), combining radionuclides adsorbents developed by AREVA and the know-how of Veolia in water treatment for the settlement of the adsorbed radioactive elements, producing sludge with a weight concentration of 80 g/L. Both companies delivered the treatment facility quickly with an efficient joint organization - in a very complex environment. Assembled on Fukushima site - badly damaged by the tsunami following the earthquake of March 11th - the system was designed, built and started in a record time of 2 month 1/2, instead of several years in a classical nuclear engineering project. The Actiflo-RadTM was a key equipment to achieve a stable situation of reactors, allowing treated water to be reused for core cooling. Commissioned with the on-site support of Veolia experts, the system reduced by 10 000 the Cs-activity of the wastewater even with significant salt content (seawater diluted twice) at a flow-rate slightly below the design value of 50 m3/hr. The implemented technologies are already used separately on AREVA sites (la Hague, fuel reprocessing plant) and for many water treatment projects by Veolia all over the world (ActifloTM and MultifloTM processes, using lamellar settling devices - in addition, the first one making use of micro-sand for a better floc quality). The complete treatment process selected by TEPCO features a physico-chemical treatment and water desalination, in five steps. After de-oiling, wastewater is primarily decontaminated through zeolite columns (Kurion process). This pre-decontaminated water is then treated on the AREVA-Veolia two stages system; at each stage, more than 30 minutes contact time with radionuclides adsorbents is needed, adsorbed radioactive particles

  8. Radioactivity and radioprotection: the every day life in a nuclear installation. Press tour at CEA/GRENOBLE 18 november 1999; Radioactivite et radioprotection: la vie quotidienne dans une installation nucleaire. Voyage de presse au Centre CEA/CADARACHE 18 novembre 1999

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-11-01

    In the framework of the public information, this paper gives a general information on the radioactivity and the radioprotection at the CEA/Cadarache center. A first part is devoted to a presentation of the radioactivity with definitions and radiation effects on the human being and the environment. An other part presents the radioprotection activities and regulations. The last part deals with specific activities of the CEA/Cadarache: the CASCAD installations for spent fuels storage, the LECA Laboratory for the Examination of Active Fuels and a dismantling installation for big irradiated objects. Historical aspects of the CEA/Cadarache are also provided. (A.L.B.)

  9. Our energies have a future. A future without CO{sub 2}. Areva in 2005; Nos energies ont de l'avenir. Un avenir sans CO{sub 2}. Areva en 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This document is the sustainable development and 2005 annual report altogether of Areva group. It presents first the challenges of energy for economical development, the climate change threat and the sustainability of nuclear power in particular with respect to radioactive wastes management and power blackouts. Then follows a presentation of Areva's 10 commitments for sustainable development (governance and continuous improvement, financial performance, innovation, customer satisfaction, commitment to employees, risk management and prevention, environmental protection, dialogue and consensus building, community involvement). The annual report presents: the 2005 highlights, Areva around the world, key data, corporate governance, organisation of the group, share information and shareholder relations, business review (front end division, reactors and services division, back end division, transmission and distribution division), financial report and glossary. (J.S.)

  10. AREVA in Gabon. Inquiry report on the situation of workers of the COMUF, Gabonese subsidy of the AREVA-COGEMA group

    International Nuclear Information System (INIS)

    After a recall of the development of uranium mining activities by the COMUF Company which is now a subsidy company of the AREVA-COGEMA group, and a presentation of the inquiry, this document reports the inquiry performed in Gabon about the medical issue (with notably inadequate security measures) and about the environmental issue related to the site rehabilitation. It also reports the analysis of questionnaires sent to ex-workers in Gabon, as well as of testimonies obtained from expatriates who are suffering from health problems. The report discusses the possibilities to take legal actions for different reasons: unintentional injuries and homicide, endangering the life of others, or inexcusable error. In conclusion the report outlines that the risk was known, that there was no information about it, and that people were deliberately maintained in ignorance

  11. AREVA Adhesive Technology. A method to mitigate and/or prevent leaks in pools with stainless steel liners Georg Kramer AREVA GmbH IBOC-G

    Energy Technology Data Exchange (ETDEWEB)

    Kraemer, G.

    2013-07-01

    Repair methods with conventional welding technique are not promising as a preventative measure mostly due to cost and time issues. With the provided repair method, the AREVA adhesive technology, it is possible to stop existing leaks and work as a prophylactic measure against future penetration from the concrete side of the pool. This technique can cover the failure mechanisms from weld failures over corrosion to mechanical stresses. Another advantage of the adhesive technology is the possibility of using remote-controlled underwater repair methods which are particularly beneficial in the repair of leaks in spent fuel pools. Extensive laboratory testing and longstanding successful experience in nuclear power plants have proved the suitability of the adhesive technology as active and proactive methods to minimize leakages in pools.

  12. AREVA Adhesive Technology. A method to mitigate and/or prevent leaks in pools with stainless steel liners Georg Kramer AREVA GmbH IBOC-G

    International Nuclear Information System (INIS)

    Repair methods with conventional welding technique are not promising as a preventative measure mostly due to cost and time issues. With the provided repair method, the AREVA adhesive technology, it is possible to stop existing leaks and work as a prophylactic measure against future penetration from the concrete side of the pool. This technique can cover the failure mechanisms from weld failures over corrosion to mechanical stresses. Another advantage of the adhesive technology is the possibility of using remote-controlled underwater repair methods which are particularly beneficial in the repair of leaks in spent fuel pools. Extensive laboratory testing and longstanding successful experience in nuclear power plants have proved the suitability of the adhesive technology as active and proactive methods to minimize leakages in pools.

  13. AREVA Back-End Possibilities for the Used Fuel of Research Test Reactors

    International Nuclear Information System (INIS)

    One of the major issues faced by the Research and Test Reactor (RTR) operators is the back end management of the used fuel elements. RTR used fuel for both HEU and LEU types are problematic for storing and disposal as their Aluminium cladding degrades leading to activity release, possible loss of containment and criticality concerns. Thus, direct disposal of RTR used fuel, (without prior treatment and conditioning) is in this respect hardly suitable. In the same manner, long term interim storage of RTR used fuel has to take into account the issue of fuel corrosion. Treating RTR used fuel allows separating the content into recyclable materials and residues. It offers many advantages as compared to direct disposal such as the retrieval of valuable fissile material, the reduction of radio-toxicity and a very significant reduction of the volume of the ultimate waste package (reduction factor between 30 and 50). In addition, the vitrification of the residues provides a package that has been specifically designed to ensure long term durability for long term interim storage as well as final disposal (99% of the activity is encapsulated into a stable matrix). RTR fuel treatment process was developed several decades ago by AREVA with now thirty years of experience at an industrial level. The treatment process consists in dissolving the whole assembly (including the Al cladding) in nitric acid and then diluting it with standard Uranium Oxide fuel dissolution liquor prior to treatment with the nominal Tributylphosphate solvent extraction process. A wide range of RTR spent fuel has already been treated in the AREVA facilities. First, at the Marcoule plant over 18 tons of U-Al type RTR fuel from 21 reactors in 11 countries was processed. The treatment activities are now undertaken at the La Hague plant where 17 tons of RTR used fuel from Australia Belgium, and France aligned for treatment. In June 2005, AREVA started to treat at La Hague ANSTO's Australian RTR used fuel from

  14. AREVA's thermo-hydraulic platform qualified as test and inspection body

    Energy Technology Data Exchange (ETDEWEB)

    Ganzman, Ingo; Herr, Wolfgang; Schmidt, Holger; Stecher, Willi; Walter, Dirk; Umminger, Klaus [AREVA NP GmbH, Erlangen (Germany); Beisiegel, Achim; Wich, Michael [AREVA NP GmbH, Karlstein (Germany); Dolleans, Phillipe; Muller, Thierry [AREVA NP S.A.S., Le Creusot (France)

    2011-07-01

    AREVA runs an internationally unique test and qualification infrastructure for power plant components. The associated thermo-hydraulic platform has been certified as test and inspection body according to ISO 17025 and ISO 17020. It comprises integral test loops for pressurised water reactors and boiling water reactors. The maximum operational parameters of the test loops in the thermo-hydraulic platform are heating capacities of up to 22 megawatts, electrical currents of up to 80 kilo amperes, pressures of up to 300 bar and temperatures of up to 600 C. The accreditation thereby covers tests and assessments as well as expert concept evaluations with appropriate support programmes. (orig.)

  15. Areva new fuel designs; increased reliability, operating margins and operating efficiency

    International Nuclear Information System (INIS)

    AREVA is continuously working on the improvement of the fuel design to address immediate and future needs of the utilities. This improvement process regularly leads to incremental changes but also to breakthrough changes addressing the next needs of the market. Since a few years now, the improvements of the fuel design and licensing benefit from the improvement and upgrade in codes and methods and computational capabilities. Changes in design are sustained by these more powerful and phenomenological tools which secure and fasten the fuel design optimization and its implementation. (Author)

  16. AREVA solutions to licensing challenges in PWR and BWR reload and safety analysis

    Energy Technology Data Exchange (ETDEWEB)

    Curca-Tivig, Florin [AREVA GmbH, Erlangen (Germany)

    2016-05-15

    Regulatory requirements for reload and safety analyses are evolving: new safety criteria, request for enlarged qualification databases, statistical applications, uncertainty propagation.. In order to address these challenges and access more predictable licensing processes, AVERA is implementing consistent code and methodology suites for PWR and BWR core design and safety analysis, based on first principles modeling and extremely broad verification and validation data base. Thanks to the high computational power increase in the last decades methods' development and application now include new capabilities. An overview of the main AREVA codes and methods developments is given covering PWR and BWR applications in different licensing environments.

  17. NC METHOD FOR GENERATION OF CONJUGATINGHYPOID GEARS BASED ON NC'S FLEXIBILITY

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    It is known that manufacture of hypoid gears is difficult and complicated, the reason lies on the limitation of traditional mechanical machine tools. With the development of NC machine tools, there should be new ways of cutting this kind of gear. Therefore, an idea to generate gears with conjugating tooth surfaces is proposed, based on the "flexibility" characteristic of NC that means various motions, in a sense, can be performed arbitrarily on NC machine tools. Using this method, the direction of the contact path on tooth surfaces can be controlled, and also, theoretically, the generated tooth surfaces can transmit motion at specific transmission ratio curve.

  18. An effective and sustainable D and D concept - competencies and experiences of AREVA

    International Nuclear Information System (INIS)

    The decommissioning and dismantling (D and D) projects - as large projects generally - are influenced by a variety of different topics. Strategy and planning are very demanding as they are defining the costs of the project for a long period of time. Addressing the political and legal framework is key as D and D projects depending on final disposal concepts usually handled by governmental organizations. If the conditions as described are fulfilled, i.e. contractor and customer collaborate already during the licensing process and the project starts with a fast minimization of the radiological inventory, the overall project duration will be reduced. Again, this offers an enormous potential to save costs. Moreover, remaining operational systems can be reduced much earlier and replaced by mobile operating systems due to the loss of radioactive inventory. AREVA as a major company in the nuclear business has a lot of experience from New Builds-, Service- and D and D projects worldwide. The presentation on the ECED Conference will also give some examples and will demonstrate the competencies and experiences AREVA gained in the last years. (author)

  19. Joining the Nuclear Renaissance with the Engineering Business Unit of AREVA

    Energy Technology Data Exchange (ETDEWEB)

    Hubert, Nathalie; Menguy, Stephane [SGN, AREVA Group, 1 rue des Herons, 78182 Saint-Quentin en Yvelines Cedex (France); Valery, Jean-Francois [AREVA NC, AREVA Group, Tour AREVA, 1 place de la Coupole, 92084 Paris La Defense Cedex (France)

    2008-07-01

    The reality of the nuclear renaissance is no longer a question. All over the world, new nuclear plants are going to be deployed; the whole fuel cycle has to be adjusted to fulfil their needs, the front-end to produce the fuel and the back-end to properly manage radioactive waste. AREVA fuel cycle engineering teams have been involved in the design of a variety of industrial plants covering the entire fuel cycle for 50 years. The consistency of the French nuclear policy has been a major factor to acquire and renew the competencies and workforce of AREVA Engineering Business Unit. Our partnership with our customers, French ones but also Japanese, Americans and from other countries, has led us to develop a comprehensive approach of the services that we can deliver, in order to give them the best answer. SGN teams have been involved in the R and D phases in order to take into account the industrialisation aspects as early as possible, and our work does not end with the delivery of the plants; it includes assistance to the operators to optimise and keep their facilities in line with the changing rules and constraints, which ensures the integration of a wide operational experience feedback and the ability to design flexible facilities. This paper will present through our experience how this global approach has been developed and continuously improved and how we are preparing our teams to be ready to answer to the coming needs. (authors)

  20. Joining the Nuclear Renaissance with the Engineering Business Unit of AREVA

    International Nuclear Information System (INIS)

    The reality of the nuclear renaissance is no longer a question. All over the world, new nuclear plants are going to be deployed; the whole fuel cycle has to be adjusted to fulfil their needs, the front-end to produce the fuel and the back-end to properly manage radioactive waste. AREVA fuel cycle engineering teams have been involved in the design of a variety of industrial plants covering the entire fuel cycle for 50 years. The consistency of the French nuclear policy has been a major factor to acquire and renew the competencies and workforce of AREVA Engineering Business Unit. Our partnership with our customers, French ones but also Japanese, Americans and from other countries, has led us to develop a comprehensive approach of the services that we can deliver, in order to give them the best answer. SGN teams have been involved in the R and D phases in order to take into account the industrialisation aspects as early as possible, and our work does not end with the delivery of the plants; it includes assistance to the operators to optimise and keep their facilities in line with the changing rules and constraints, which ensures the integration of a wide operational experience feedback and the ability to design flexible facilities. This paper will present through our experience how this global approach has been developed and continuously improved and how we are preparing our teams to be ready to answer to the coming needs. (authors)

  1. AREVA revenue and data for the first nine months of 2008; AREVA informations et chiffre d'affaires relatifs aux neuf premiers mois de l'exercice 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This public information sheet presents financing data of the group AREVA for the first nine months of 2008. It shows a high increase of the revenue (12,9%). The data are detailed for each activity sector, front end, reactors and services, back end, transmission and distribution. Consolidated revenue for the years 2007 are also provided. (A.L.B.)

  2. Phase 1A Final Report for the AREVA Team Enhanced Accident Tolerant Fuels Concepts

    Energy Technology Data Exchange (ETDEWEB)

    Morrell, Mike E. [AREVA Federal Services LLC, Charlotte, NC (United States)

    2015-03-19

    In response to the Department of Energy (DOE) funded initiative to develop and deploy lead fuel assemblies (LFAs) of Enhanced Accident Tolerant Fuel (EATF) into a US reactor within 10 years, AREVA put together a team to develop promising technologies for improved fuel performance during off normal operations. This team consisted of the University of Florida (UF) and the University of Wisconsin (UW), Savannah River National Laboratory (SRNL), Duke Energy and Tennessee Valley Authority (TVA). This team brought broad experience and expertise to bear on EATF development. AREVA has been designing; manufacturing and testing nuclear fuel for over 50 years and is one of the 3 large international companies supplying fuel to the nuclear industry. The university and National Laboratory team members brought expertise in nuclear fuel concepts and materials development. Duke and TVA brought practical utility operating experience. This report documents the results from the initial “discovery phase” where the team explored options for EATF concepts that provide enhanced accident tolerance for both Design Basis (DB) and Beyond Design Basis Events (BDB). The main driver for the concepts under development were that they could be implemented in a 10 year time frame and be economically viable and acceptable to the nuclear fuel marketplace. The economics of fuel design make this DOE funded project very important to the nuclear industry. Even incremental changes to an existing fuel design can cost in the range of $100M to implement through to LFAs. If this money is invested evenly over 10 years then it can take the fuel vendor several decades after the start of the project to recover their initial investment and reach a breakeven point on the initial investment. Step or radical changes to a fuel assembly design can cost upwards of $500M and will take even longer for the fuel vendor to recover their investment. With the projected lifetimes of the current generation of nuclear power

  3. Carbon Nanotubes Investigated by N@C60 and N@C70 Spin Probes

    Science.gov (United States)

    Corzilius, B.; Gembus, A.; Dinse, K.-P.; Simon, F.; Kuzmany, H.

    2005-09-01

    Nitrogen atoms encapsulated in C60 can be used to detect small deviations from spherical symmetry via deformation-induced non-vanishing Zero-Field-Splitting (ZFS). In this context, experiments were performed by using these electronic quartet spin probes to investigate single wall carbon nanotubes. Time-fluctuating ZFS interaction would be indicative for rotational and/or translational degrees of freedom. Using pulsed EPR techniques, spin relaxation rates of N@C60 and also of N@C70 molecules with inherent static ZFS were measured. The analysis of their temperature dependence gave information about the dynamics of N@C60 and N@C70 molecules confined to the inside of the tubes.

  4. NC/NG与ADN的相互作用%Interaction of NG/NC with ADN

    Institute of Scientific and Technical Information of China (English)

    张腊莹; 衡淑云; 刘子如; 张皋; 赵凤起; 谭惠民

    2009-01-01

    用高压差示扫描量热法(PDSC),热重-微商热重法(TG-DTG),研究了双基粘合剂(NC/NG体系)与二硝酰胺铵(ADN)之间的相互作用.结果表明,(NC/NG)/ADN体系中NG的分解峰由NC/NG中的207.0 ℃提前至159.8 ℃,在高压下该分解峰温提前至153.6 ℃.NC/ADN的分解峰温比NG/ADN提前了4.8 ℃,而且大部分的ADN没有被NG加速而提前分解,表明NC对ADN的作用比NG更强烈.此外,还用真空安定性试验(VST)评价了NC/NG与ADN的相容性,混合体系的净增放气量大于11 mL,属于严重不相容,证明在90 ℃下NC/NG与ADN之间也存在强烈的相互作用.

  5. Information report on nuclear safety and radiation protection of the Tricastin AREVA site - Issue 2012

    International Nuclear Information System (INIS)

    Published in compliance with the French code of the environment, this report first presents different aspects of the Areva's Tricastin site which comprises five basic nuclear installations or INBs, and seven ICPE (installation classified for the protection of the environment). The activities are dedicated to uranium conversion, uranium enrichment, uranium chemistry, industrial services, and fuel manufacturing. The report presents this important industrial site, describes the various measures regarding nuclear safety and radiation protection, reports nuclear events which occurred on this site and had to be declared, reports the management of releases by this site and the control of the environment. The next part addresses the management of the various wastes produced by the different installations present on this site. The management of other impacts is also reported. The last chapter reviews the actions undertaken in the field of transparency and information

  6. Information report on nuclear safety and radiation protection of La Hague AREVA site. Issue 2014

    International Nuclear Information System (INIS)

    Published in compliance with the French code of the environment, this report first presents the Areva's La Hague site which comprises several basic nuclear installations (INB), is dedicated to several activities related to the nuclear fuel cycle, is submitted to a constraining legal and regulatory framework, and implements a policy for a sustainable development and continuous progress. The document describes the various measures regarding nuclear safety and radiation protection, reports nuclear events which are classified according to the INES scale and occurred and had to be declared in 2014, describes the management of effluents by the different installations present on this site and the control of the environment. It addresses the waste management and the management of other impacts. It gives an overview of actions undertaken regarding information and transparency. Recommendations of the CHSCT are reported

  7. The AREVA customized chemical cleaning C3-concept as part of the steam generator asset management

    International Nuclear Information System (INIS)

    with various chemical cleaning methods and their world wide applications AREVA has developed the 'C3' Customized Chemical Cleaning concept. This concept covers the entire range of steam generator chemical cleaning. With this approach, also specific problems like removal of sludge piles from tube sheet can be adequately addressed. At European PWRs the above presented overall approach was applied successfully in 2009 and 2010. Prior to the chemical cleaning the steam generator status was investigated and evaluated in a common approach of all relevant AREVA departments. For example, as a result of one plant specific evaluation, a hard sludge problem was identified combined with denting indications mainly on the tube sheet. Based on this SG assessment and the expected amount of deposits an individually tailored and site specific cleaning approach was developed in close cooperation with the plant operator. Prior to the chemical cleaning an inner bundle lancing was performed to mechanically weaken the hard deposits, which allows deep penetration of the cleaning agent into the deposits. The chemical cleaning methodology for this site specific SG problem was the AREVA DART HT process selected from the C3 toolbox. The DART HT process allows an efficient removal of hard deposits, while keeping the average corrosion below 50 μm. After the chemical cleaning a subsequent tube sheet lancing was performed, effectively removing the chemically softened deposits. This approach removed the targeted amount of deposits, thus eliminating the hard sludge denting of tubes at the tube sheet. This paper describes the joint approach of the plant operator and AREVA for the on-site chemical cleaning to the improve steam generator condition. (authors)

  8. Status of safety in nuclear facilities - 2012. AREVA General Inspectorate Annual report

    International Nuclear Information System (INIS)

    After a message from the Areva's Chief Executive Officer and a message from the senior Vice President of safety, health, security, sustainable development, a text by the inspector general comments the key safety results (events, dose levels, radiological impacts), the inspection findings, the areas of vigilance (relationship with the ASN, the management of the criticality risk, and facility compliance), some significant topics after the Fukushima accident. Then this report addresses the status of nuclear safety and radiation protection in the group's facilities and operations. It more specifically addresses the context and findings (lessons learned from the inspections, operating experience from event, employee radiation monitoring, environmental monitoring), crosscutting processes (safety management, controlling facility compliance, subcontractor guidance and management, crisis management), specific risks (criticality risk, fire hazards, transportation safety, radioactive waste management, pollution prevention, liability mitigation and dismantling), and areas for improvement and outlook

  9. Information report on nuclear safety and radiation protection of La Hague AREVA site. Issue 2013

    International Nuclear Information System (INIS)

    Published in compliance with the French code of the environment, this report first presents the Areva's La Hague site which comprises several basic nuclear installations (INB), is dedicated to several activities related to the nuclear fuel cycle, is submitted to a constraining legal and regulatory framework, and implements a policy for a sustainable development and continuous progress. The document describes the various measures regarding nuclear safety and radiation protection, reports nuclear events which are classified according to the INES scale and occurred and had to be declared in 2013, describes the management of effluents by the different installations present on this site and the control of the environment. It addresses the waste management and the management of other impacts. It gives an overview of actions undertaken regarding information and transparency. Recommendations of the CHSCT are reported

  10. Areva - Environmental, social and societal report 2014, Zirconium sites: Jarrie, Ugine, Rugles, Montreuil-Juigne, Paimboeuf

    International Nuclear Information System (INIS)

    This report first gives an overview of Areva's zirconium-related activities: those integrated into the nuclear fuel cycle, industrial activities distributed among five production sites (Jarrie, Ugine, Rugles, Montreuil-Juigne, Paimboeuf) with an indication of the various products produced on each site (from zirconia to tubes and sheets). The history and activities of these five plants are briefly described. The next part addresses issues related to health, safety, and the environment: health and safety at work, risk prevention and management, improvement of environmental performance (consumption management, waste control and management), material flows and their management modes in the different plants (indication of input products, activities, output products, and destination). The last part addresses social and societal issues: recruiting, training, ability management, actions for local economic development

  11. NC10 bacteria in marine oxygen minimum zones

    DEFF Research Database (Denmark)

    Padilla, Cory; Bristow, Laura A.; Sarode, Neha;

    2016-01-01

    Bacteria of the NC10 phylum link anaerobic methane oxidation to nitrite denitrification through a unique O2-producing intra-aerobic methanotrophy pathway. A niche for NC10 in the pelagic ocean has not been confirmed. We show that NC10 bacteria are present and transcriptionally active in oceanic....... rRNA and mRNA transcripts assignable to NC10 peaked within the OMZ and included genes of the putative nitrite-dependent intra-aerobic pathway, with high representation of transcripts containing the unique motif structure of the nitric oxide (NO) reductase of NC10 bacteria, hypothesized...

  12. Excited Baryon Spectroscopy in the Large $N_c$ Limit

    CERN Document Server

    Goity, J L

    1996-01-01

    The leading in 1/N_c spin-flavor symmetry breaking mass splittings, of order N_c^0, in excited non-strange Baryons are shown to be given, up to two-body operators, by three different effective Hamiltonians: Thomas precession spin-orbit, spin-isospin tensor, and spin-orbit with isospin exchange. Explicit expressions for their matrix elements between low excited Baryons are obtained, and the structure of the mass splittings in large N_c is established to first order of perturbation theory. The problem of extending the large N_c results to the real world with N_c=3 is briefly addressed.

  13. Areva revenue and data for the first quarter of 2008; Areva informations et chiffre d'affaires relatifs au 1. trimestre de l'exercice 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    First quarter 2008 revenue was up 12.1% year-on-year, to 2.769 billion euros. Like-for-like (at constant exchange rates and consolidation scope), growth came to 14.5%. Foreign exchange had a negative impact of 2.5%, or -69 million euros, mainly due to currency translation tied to the US dollar drop compared with the euro. The consolidation scope had a positive impact of +0.7% or 18 million euros, chiefly as a result of the consolidation of VEI Distribution (specializing in medium voltage distribution) and Passoni and Villa (world leader in the manufacture of high voltage bushings) in the Transmission and Distribution division. The main growth engines for first quarter revenue were the Reactors and Services division and the Back End division, with growth of 29.7% (+36.8% LFL1) and 13.8% (+14.1% LFL1) respectively. Outside France, revenue rose to 1.857 billion euros, compared with 1.753 billion euros in the first quarter of 2007. This represents 67% of total revenue. As a reminder, the group points out that: - revenue can vary significantly from one quarter to the next in the nuclear businesses, and quarterly operations should therefore not be taken as a reliable basis for annual projections; - the foreign exchange impact mentioned in this release comes from the translation of subsidiary accounts into the group's unit of account, and primarily reflects the US dollar in relation to the euro. AREVA also points out that its foreign exchange hedging policy for commercial operations aims to shield profitability from fluctuations in exchange rates in relation to the euro.

  14. 'Action 2016': AREVA's strategic action plan; AREVA presente son Plan d'Actions Strategique 'Action 2016'

    Energy Technology Data Exchange (ETDEWEB)

    Marie, Patricia; Briand, Pauline; Floquet-Daubigeon, Fleur; Michaut, Maxime; De Scorbiac, Marie; Du Repaire, Philippine

    2011-12-13

    On December 13, 2011, Luc Oursel, CEO, and Pierre Aubouin, Chief Financial Officer presented the group's strategic plan for the period 2012-2016. The plan has been drawn up collectively and is based on a thorough-going analysis and a realistic assessment of perspectives for all group activities and associated resources. Development of nuclear and renewable energies: the fundamentals are unchanged. In this context, the German decision remains an isolated case and the great majority of nuclear programs around the world have been confirmed. More conservative in its projections than the International Energy Agency, the group expects growth of 2.2% annually, reaching 583 GW of installed nuclear capacity by 2030, against 378 GW today. However, the Fukushima accident will lead to delays in launching new programs. 'Action 2016' plan aims to consolidate AREVA's leadership in nuclear energy and become a leading player in renewable energy. The group's strategic action plan 'Action 2016' is based on the following strategic choices: - commercial priority given to value creation, - selectivity in investments, - strengthening of the financial structure. These demand an improvement in the group's performance by 2015. This plan makes nuclear safety a strategic priority for the industrial and commercial performance of the group. This ambitious performance plan for the period 2012-2016 will give the group the wherewithal to withstand a temporary slowdown in the market resulting from the Fukushima accident and to deliver safe and sustainable growth of the business. The plan sets out the strategic direction for the group's employees for the years ahead: taking advantage of the expected growth in nuclear and renewable energies, targeted investment programs, and return to self-financing as of 2014

  15. Concept and operational experience of the Areva DMT process for preventive maintenance of steam generators; Concepto y experiencia operacional del proceso DMT de Areva para el mantenimiento preventivo de generadores de vapor

    Energy Technology Data Exchange (ETDEWEB)

    Weiss, S.; Gaspar, J. D.; Potier, P.; Jones, D.

    2015-07-01

    The AREVAs DMT process is a preventive chemical cleaning of the steam generators (SG) that provides the required features to keep the SG in good operative conditions. -Very low carbon steel corrosion -Innocuous towards stainless steel and nickel base alloys -Inherently safe process -Efficient magnetite dissolution -No use of CMR (i.e Carcinogenic, Mutagenic and toxic to Reproduction) Chemicals (e. g. Hydrazine) -No ammonia emissions -Easy decomposition of waste Several applications have been performed world-wide over the last 5 years. The results were fully satisfying in all the above stated points. The removal of up to 800 kg of dry deposits per SG was realized. A positive effect on fouling factor was observed, showing that AREVAs DMT process is a safe, easy and successful way to maintain the steam generators in excellent operative conditions. (Author)

  16. AREVA Technical Days (ATD) session 3: operations of the reactors and services division, technical and economic aspects; AREVA Technical Days (ATD) session 3: les activites du pole reacteurs et services, aspects techniques et economiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This third session deals with the reactors technologies basics, the EPR and SWR 1000 issues and outlook, the nuclear systems of the future, the business opportunities and business models. (A.L.B.)

  17. CSR and Sustainable Development: Multinationals are they Socially Responsible in Sub-Saharan Africa? The case of Areva in Niger

    OpenAIRE

    Daouda, Youssoufou Hamadou

    2014-01-01

    The purpose of this paper is to contribute in understanding issues related to Corporate Social Responsibility (CSR) in Sub-Saharan Africa. The paper demonstrates that even though multinationals strategies participate with economic and social development, there still is much to do given environmental, social and economic expectations. The case of Areva discussed here illustrates the discrepancy that exists between such companies’ CSR strategies and the local conditions in which they evolve (ar...

  18. AREVA's toolbox for long-term best performance and reliable operation of nuclear steam generators

    International Nuclear Information System (INIS)

    Long-term integrity and high performance of major plant systems and components are of uppermost importance for the successful operation of any power plant. AREVA's experience gathered with water-steam cycle chemistry treatments in more than 40 years yields the conclusion: Accumulation of corrosion products in SGs may result in local overheating and enrichment of impurities up to critical levels. This can lead to several degradation phenomena of the structural materials of the SGs. Therefore, minimization of corrosion product generation and prevention of deposit accumulation is required. The objective of AREVA's asset management program is to support operators by minimizing corrosion damage and performance losses of water-steam cycle systems and components and thereby to maximize the availability and economic performance of the plant. Such asset management program is in principle a closed cycle process. It is based on control, corrective and preventive measures. The objective of control measure is deriving a widespread assessment of the corrosion status of the steam-water cycle which yields to weak points and identifying the best suited corrective and/or preventive measures. In the subsequent steps appropriate measures which improve the current status or counteract on identified issues are identified and applied. Corrective measures, likes mechanical and/or chemical cleaning are targeting the minimization of negative influence on plant performance caused by corrosion in the steam-water cycle. Complementary to corrective measures are preventive ones, like optimization of pH strategy and AREVA's FFA technology could by applied. They are focusing on the origin of corrosion product generation. AREVA is offering a toolbox for long-term best performance and reliable operation of NPPs. (author)

  19. New Method for Hard Sludge Removal from Tube Plate Surfaces: The AREVA Enhanced Inner Bundle Lancing Process

    Energy Technology Data Exchange (ETDEWEB)

    Stoss, J.; Santibanez, M.

    2014-07-01

    AREVA is currently conducting the final steps to start-up an enhanced technology to remove hard sludge deposits from the inner bundle area of the tube sheets. This inner bundle area at the top of the tube plate is the location with the lowest flow velocity of the circulating water at the secondary closed loop. The reduced water speed causes increased accumulation of ferrite oxides at these locations. (Author)

  20. Dynamic characteristics of NC table with SVD

    Institute of Scientific and Technical Information of China (English)

    Linhong WANG; Bo WU; Runsheng DU; Shuzi YANG

    2008-01-01

    This paper employs the SVD (singular value decomposition) method to study dynamic characteristics of a numerical control (NC) table. Acceleration signals of the NC table at three directions are tested; the singular spectrum of the signals is acquired with SVD; principal components of the signals are found out; dynamic char-acteristics of the signals and their contributing factors are studied by extracting dynamic characteristics of principal components; and signals and principal components are quantitatively analyzed by calculating signal energy. Results indicate that signal characteristics of the previous two principal components are apparent, based on which dynamic characteristics of chaotic signal can be extracted. Signal at the perpendicular direction of the table is signifi-cantly correlated with that at the horizontal motion dir-ection, which indicates that they are excited from the same vibration source. However, signals perpendicular to each other in terms of the motion direction at the horizontal level are rarely correlated; the total signal energy is max-imum at the motion direction, minimum at the horizontal non-motion direction, and medium at the perpendicular non-motion direction. Bending vibration of the lead screw at the perpendicular direction is far more violent than that at the horizontal direction.

  1. Processing of the GALILEO fuel rod code model uncertainties within the AREVA LWR realistic thermal-mechanical analysis methodology

    International Nuclear Information System (INIS)

    The availability of reliable tools and associated methodology able to accurately predict the LWR fuel behavior in all conditions is of great importance for safe and economic fuel usage. For that purpose, AREVA has developed its new global fuel rod performance code GALILEO along with its associated realistic thermal-mechanical analysis methodology. This realistic methodology is based on a Monte Carlo type random sampling of all relevant input variables. After having outlined the AREVA realistic methodology, this paper will be focused on the GALILEO code benchmarking process, on its extended experimental database and on the GALILEO model uncertainties assessment. The propagation of these model uncertainties through the AREVA realistic methodology is also presented. This GALILEO model uncertainties processing is of the utmost importance for accurate fuel design margin evaluation as illustrated on some application examples. With the submittal of Topical Report GALILEO to the U.S. NRC in 2013, GALILEO and its methodology are on the way to be industrially used in a wide range of irradiation conditions. (authors)

  2. Molecular mechanisms of long ncRNAs in neurological disorders

    Directory of Open Access Journals (Sweden)

    Dubravka eVučićević

    2014-03-01

    Full Text Available Long non-coding RNAs (ncRNAs have added an unexpected layer of complexity in the regulation of gene expression. Mounting evidence now links long ncRNAs to fundamental biological processes such as development and differentiation, and recent research shows important involvement of long ncRNAs in a variety of diseases including neurodegenerative disorders, such as Parkinson’s, Alzheimer’s, spinocerebellar ataxia and Huntington’s diseases. Furthermore, long ncRNAs are speculated to be implicated in development of psychiatric disorders such as schizophrenia and bipolar disorders. Long ncRNAs contribute to these disorders in diverse ways, from regulation of transcription to modulation of RNA processing and translation. In this review, we describe the diverse mechanisms reported for long ncRNAs, and discuss how they could mechanistically be involved in the development of neurological disorders.

  3. AREVA. Operating and financial results for the first half of 2011

    International Nuclear Information System (INIS)

    The first half of 2011 was marked by the accident at the Fukushima power plant following the unprecedented natural disasters that struck Japan. AREVA drew the first consequences from these events as early as June 2011 and recorded provisions and impairment in its half-year financial statements, related in particular to the expected short-term level of activity of some facilities. Close to 200 million euros in orders were canceled out of a total in backlog of more than 43 billion euros, which was down by a little more than 1 billion euros compared with the end of 2010. The longer term consequences of these events for AREVA are being assessed. They could concern all operations in the nuclear cycle and will be included in the strategic plan to be prepared by the end of the second half of the year. The fundamentals underpinning the development of the nuclear market are unchanged: strong growth in demand for electricity in the coming decades, diminished fossil resources, the search by many countries for energy independence, and the growing need to address climate issues. Through its efficient integrated business model, AREVA is present in every segment of the nuclear chain and is positioned in high-tech renewable energies with an offering that is perfectly suited to the requirements of the world's power companies. Decisions by governments on energy policy and by the safety authorities in different countries will influence market developments and the schedule for executing certain projects. Germany announced its decision to withdraw permanently from nuclear power and Switzerland intends to do the same, while Italy has opted not to restart its program. And yet the majority of countries have confirmed their decision to pursue nuclear power programs, present and future. In the first half, the group continued to draw down debt, achieving a net debt level of less than 3 billion euros at the end of June, thanks in particular to the conclusion of the proceedings with Siemens

  4. 76 FR 49664 - Drawbridge Operation Regulation; Beaufort Channel, Beaufort, NC

    Science.gov (United States)

    2011-08-11

    ... deviation is necessary to accommodate racing participants for the ``Neuse Riverkeeper Foundation Sprint..., at Beaufort, NC. The bike route of the ``Neuse Riverkeeper Foundation Sprint Triathlon'' crosses...

  5. 复合离子镀膜技术制备Cr+Ti+TiNC/TiNC+C/DLC膜性能研究%Properties of Cr+Ti+TiNC/TiNC+C/DLC films prepared by composite ion plating

    Institute of Scientific and Technical Information of China (English)

    马胜歌; 于大洋; 杨宏伟; 张以忱

    2008-01-01

    结合中频孪生靶非平衡磁控溅射、电弧离子镀和霍尔离子源辅助沉积三种工艺,制备了Cr+Ti+TiNC/TiNC+C/DLC硬质膜.硬质膜呈深黑色,表面比较光滑,顶层为掺N的类金刚石(Diamond-like Carbon,DLC)膜,中间层为含C的TiNC,底层为含Ti和Cr的TiNC,力学性能良好.

  6. Codes and Methods Supporting AREVA Fuel Solutions for the Future - Development Strategy

    International Nuclear Information System (INIS)

    Energy suppliers are keenly interested in effective margin management in their nuclear operations. They also need to accurately predict the capabilities and behavior of their reactors. For example, the inability to accurately predict thermal limit margins during reactor start-ups or the onset of reactor coast-down at the end of cycle can significantly impact their ability to deliver on their power generation commitments and, ultimately, impacts the power generation revenues. Fuel suppliers are expected to increase (1) availability factors (flawless fuel operation, short time reloading..), (2) fuel performance (reliability, flexibility, burn-up, thermal hydraulic performance..), (3) safety margins. The present evolution of fuel assembly and core designs towards greater heterogeneity, higher enrichments and burnup, Gd-loading, MOX loading, low leakage, etc., challenge the codes and methods (C and M) development. Safety Authority requirements are evolving (e.g. new RIA criteria, request for enlarged qualification databases..); fuel suppliers have to anticipate these evolutions and to come up with methods that properly meet the new needs, such that penalties on products or on limits in operation are avoided. Anticipating customer's needs for the future, the Fuel Sector of AREVA NP took up the challenge to significantly advance the state-of-the-art in nuclear methods and started in 2002 a series of large R and D programs preparing the next generation of C and M for fuel assembly design, core design, safety analysis and core monitoring. An overview is given over the strategic R and D axis of the Fuel Sector of AREVA NP. The domains of neutronics, core thermal-hydraulics and fuel rod thermal-mechanics are covered. The main goals of the C and M development strategy are: a) Providing the targeted market with the state-of-the-art C and M that meet customer needs and give appropriate answers to safety authority requirements. b) Anticipate future market needs in order to keep

  7. Task Order 22 – Engineering and Technical Support, Deep Borehole Field Test. AREVA Summary Review Report

    Energy Technology Data Exchange (ETDEWEB)

    Denton, Mark A. [AREVA Federal Services, Charlotte, NC (United States)

    2016-01-19

    Under Task Order 22 of the industry Advisory and Assistance Services (A&AS) Contract to the Department of Energy (DOE) DE-NE0000291, AREVA has been tasked with providing assistance with engineering, analysis, cost estimating, and design support of a system for disposal of radioactive wastes in deep boreholes (without the use of radioactive waste). As part of this task order, AREVA was requested, through a letter of technical direction, to evaluate Sandia National Laboratory’s (SNL’s) waste package borehole emplacement system concept recommendation using input from DOE and SNL. This summary review report (SRR) documents this evaluation, with its focus on the primary input document titled: “Deep Borehole Field Test Specifications/M2FT-15SN0817091” Rev. 1 [1], hereafter referred to as the “M2 report.” The M2 report focuses on the conceptual design development for the Deep Borehole Field Test (DBFT), mainly the test waste packages (WPs) and the system for demonstrating emplacement and retrieval of those packages in the Field Test Borehole (FTB). This SRR follows the same outline as the M2 report, which allows for easy correlation between AREVA’s review comments, discussion, potential proposed alternatives, and path forward with information established in the M2 report. AREVA’s assessment focused on three primary elements of the M2 report: the conceptual design of the WPs proposed for deep borehole disposal (DBD), the mode of emplacement of the WP into DBD, and the conceptual design of the DBFT. AREVA concurs with the M2 report’s selection of the wireline emplacement mode specifically over the drill-string emplacement mode and generically over alternative emplacement modes. Table 5-1 of this SRR compares the pros and cons of each emplacement mode considered viable for DBD. The primary positive characteristics of the wireline emplacement mode include: (1) considered a mature technology; (2) operations are relatively simple; (3) probability of a

  8. AREVA NP's advanced Thermal Hydraulic Methods for Reactor Core and Fuel Assembly Design

    International Nuclear Information System (INIS)

    The main objective of the Thermal Hydraulic (TH) analysis of reactor core and fuel assembly design is the determination of pressure loss and critical heat flux (CHF). Especially the description of the latter effect requires the modeling of a large variety of physical phenomena starting with single phase quantities like turbulence or fluid-wall friction, two phase quantities like void distributions, heat transfer between fuel rod and fluid and ultimately the CHF mechanism itself. Additional complexity is added by the fact that the relevant geometric scales which have to be resolved, cover a wide range from the length of the fuel assembly (∼ 4000 mm), over the typical dimensions of sub-channel cross sections and the vanes on the spacer grids (∼ 10 mm) down to the microscopic scales set by bubble sizes and boundary layers (mm to sub mm). Due to the above described situation the necessary TH quantities are often determined by measurements. The main advantage of this technique is that measurements are widely accepted and trusted if the geometry and flow conditions are sufficiently close to real reactor conditions. The main disadvantage of experiments is that they are expensive both with respect to time and money; especially in high pressure tests they give only limited access to the test object. Consequently there is a strong interest to develop computer codes with the goal of minimizing the need of experiments, and hence, speeding up and reducing costs of fuel assembly and core design. Today most of the design work is based on sub-channel codes, originally developed in the 70's; they provide an effective description of the TH in fuel assemblies by regarding the fuel assembly as a system of communicating channels (the volume enclosed by four fuel rods = one sub-channel). Further development of these codes is one main focus of AREVA NP's Thermal Hydraulic method and code development strategy. To focus the know-how and resources existing in the different regions of

  9. Task Order 22 – Engineering and Technical Support, Deep Borehole Field Test. AREVA Summary Review Report

    Energy Technology Data Exchange (ETDEWEB)

    Denton, Mark A. [AREVA Federal Services, Charlotte, NC (United States)

    2016-01-19

    Under Task Order 22 of the industry Advisory and Assistance Services (A&AS) Contract to the Department of Energy (DOE) DE-NE0000291, AREVA has been tasked with providing assistance with engineering, analysis, cost estimating, and design support of a system for disposal of radioactive wastes in deep boreholes (without the use of radioactive waste). As part of this task order, AREVA was requested, through a letter of technical direction, to evaluate Sandia National Laboratory’s (SNL’s) waste package borehole emplacement system concept recommendation using input from DOE and SNL. This summary review report (SRR) documents this evaluation, with its focus on the primary input document titled: “Deep Borehole Field Test Specifications/M2FT-15SN0817091” Rev. 1 [1], hereafter referred to as the “M2 report.” The M2 report focuses on the conceptual design development for the Deep Borehole Field Test (DBFT), mainly the test waste packages (WPs) and the system for demonstrating emplacement and retrieval of those packages in the Field Test Borehole (FTB). This SRR follows the same outline as the M2 report, which allows for easy correlation between AREVA’s review comments, discussion, potential proposed alternatives, and path forward with information established in the M2 report. AREVA’s assessment focused on three primary elements of the M2 report: the conceptual design of the WPs proposed for deep borehole disposal (DBD), the mode of emplacement of the WP into DBD, and the conceptual design of the DBFT. AREVA concurs with the M2 report’s selection of the wireline emplacement mode specifically over the drill-string emplacement mode and generically over alternative emplacement modes. Table 5-1 of this SRR compares the pros and cons of each emplacement mode considered viable for DBD. The primary positive characteristics of the wireline emplacement mode include: (1) considered a mature technology; (2) operations are relatively simple; (3) probability of a

  10. Environmental and Quality Management System at AREVA/COGEMA Resources, Inc

    International Nuclear Information System (INIS)

    COGEMA Resources Inc. (part of the Areva Group) is a Canadian company with its head office in Saskatoon, Saskatchewan. It owns and operates mining and milling facilities in Northern Saskatchewan, where it produces uranium concentrate. The company is also active in uranium exploration, decommissioning and joint ventures with other organizations at various operating sites within Canada. The company has adopted an integrated approach to environmental and quality management of all its operational activities, which comprise a complete cycle from uranium exploration to development to mining and milling through to decommissioning. This commences with exploration projects mainly in the Athabasca Basin of Northern Saskatchewan, continues with the McClean Lake site - a uranium mining and milling facility that started production in 1999 and closes with the decommissioning of the Cluff Lake site - a uranium mine which ceased production in 2002. The system is designed to provide an integrated approach to ensure that: All activities are conducted in a safe and efficient manner, meeting all applicable regulatory and internal requirements; the requirements of the ISO 14001 standard are met; The principles of sustainable development are implemented throughout the organization. To this end, the McClean Lake site and exploration activities (both were the first for the uranium industry within Canada) are ISO 14001 certified, while the Cluff Lake site should follow very shortly. The development of the integrated management system and operational experience are discussed with examples drawn from the various operating activities. Challenges and further development opportunities will be mentioned. (author)

  11. Preparation and EPR characterization of N@C60 and N@C70 based peapods

    Science.gov (United States)

    Corzilius, B.; Gembus, A.; Weiden, N.; Dinse, K.-P.

    2005-09-01

    Using the quartet spin of encased nitrogen atoms as an electron paramagnetic resonance (EPR) probe, it is possible to examine the fullerene/nanotube interactions in a peapod. A purification method is developed which allows low temperature filling of nanotubes with endohedral fullerenes. The paramagnetic impurities of undoped single wall carbon nanotubes (SWNT) are characterized via EPR resulting in a broad superparamagnetic signal of the remaining catalyst particles and a rather narrow signal of carbonaceous material. Comparison of EPR spectra of several nitrogen endohedral doped peapods with their analogues obtained in a solid fullerene matrix shows a significant broadening of N@C60 and N@C70 EPR signals. This broadening is related to a non-vanishing zero-field splitting caused by deformation of the fullerene cage upon encapsulation.

  12. Phase 1A Final Report for the AREVA Team Enhanced Accident Tolerant Fuels Concepts

    Energy Technology Data Exchange (ETDEWEB)

    Morrell, Mike E. [AREVA Federal Services LLC, Charlotte, NC (United States)

    2015-03-19

    In response to the Department of Energy (DOE) funded initiative to develop and deploy lead fuel assemblies (LFAs) of Enhanced Accident Tolerant Fuel (EATF) into a US reactor within 10 years, AREVA put together a team to develop promising technologies for improved fuel performance during off normal operations. This team consisted of the University of Florida (UF) and the University of Wisconsin (UW), Savannah River National Laboratory (SRNL), Duke Energy and Tennessee Valley Authority (TVA). This team brought broad experience and expertise to bear on EATF development. AREVA has been designing; manufacturing and testing nuclear fuel for over 50 years and is one of the 3 large international companies supplying fuel to the nuclear industry. The university and National Laboratory team members brought expertise in nuclear fuel concepts and materials development. Duke and TVA brought practical utility operating experience. This report documents the results from the initial “discovery phase” where the team explored options for EATF concepts that provide enhanced accident tolerance for both Design Basis (DB) and Beyond Design Basis Events (BDB). The main driver for the concepts under development were that they could be implemented in a 10 year time frame and be economically viable and acceptable to the nuclear fuel marketplace. The economics of fuel design make this DOE funded project very important to the nuclear industry. Even incremental changes to an existing fuel design can cost in the range of $100M to implement through to LFAs. If this money is invested evenly over 10 years then it can take the fuel vendor several decades after the start of the project to recover their initial investment and reach a breakeven point on the initial investment. Step or radical changes to a fuel assembly design can cost upwards of $500M and will take even longer for the fuel vendor to recover their investment. With the projected lifetimes of the current generation of nuclear power

  13. DRIVE AND CONTROL OF VIRTUAL-AXIS NC MACHINE TOOLS

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    The structure features and driving modes of virtual-axis NC machine tools are studied.Accor- ding to different application requirements,the three-axis control method,the five-axis control method and the six-freedom control method are put forward.These results lay a foundation for the product development of the virtual-axis NC machine tools.

  14. Advances and Future Issues for STEP-compliant NC Manufacture

    Institute of Scientific and Technical Information of China (English)

    LIU Riliang; ZHANG Chengrui; NEWMAN Stephen T

    2006-01-01

    Over the last years a new data model, known as STEP-NC, has been proposed and accepted as an international standard (ISO 14649) to replace ISO 6983 (G&M code programming). STEP-NC enables bi-directional communication of high-level geometric and manufacturing information, and provides a way of interoperable and adaptable NC manufacturing of mechanical components. This paper starts with an overview of the STEP-NC data model, provides a brief review of the global research and development activities, and tries to identify the issues and challenges for the application of the new standard and the implementation of related systems. This paper also provides a vision of the STEP-compliant NC manufacturing and the development trends of related technologies and systems, focusing on STEP-compliant CNCs.

  15. AREVA Technical Days (ATD) session 2: operations of the back-end of the nuclear fuel cycle; AREVA Technical Days (ATD) session 2: les activites du pole Aval du cycle du combustible nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This second session deals with the reprocessing business, back-end financing mechanisms, technology transfer, environmental management, risk management programs, research and development contribution to waste volume reductions, issues and outlook of nuclear wastes, comparison of the open and closed cycles. (A.L.B.)

  16. AREVA announces US$ 7.75 Per share friendly cash offer for UraMin; Offre publique d'achat amicale d'AREVA sur UraMin sur la base d'un prix de 7,75US$ par action

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    AREVA and UraMin Inc. ('UraMin') entered on June 15, 2007 into an agreement in respect of AREVA's friendly cash offer for 100% of the share capital of UraMin. UraMin is listed in London (AIM) and Toronto (TSX). AREVA (Euronext Paris) already owns 5.5% of UraMin's share capital. This cash offer of AREVA will be made through its indirect wholly-owned subsidiary CFMM Development ('AREVA') based on a price of US$ 7.75 per UraMin share. The total offer consideration amounts to more than USD 2.5 billion for 100% of the fully diluted share capital of UraMin. This represents a premium of 21% over UraMin 20-day weighted average trading price ending on June 8, 2007. The UraMin Board of Directors, after consulting with its financial advisors, has determined that the offer is fair and in the best interest of the UraMin shareholders and it has resolved to recommend acceptance of the Offer. BMO Capital Markets has provided an opinion that the offer is fair, from a financial point of view, to the UraMin shareholders. In connection with the offer, all directors and certain other shareholders representing approximately 25% of the outstanding UraMin shares (calculated on a fully diluted basis) have entered into lock-up agreements with AREVA pursuant to which they have agreed to tender all their UraMin shares to AREVA's offer. The support agreement entered into between AREVA and UraMin provides for, among other things, in case a superior proposal is accepted by UraMin, a right to match in favour of AREVA. The support agreement also includes a break up fee in favour of AREVA of US$ 75 million under certain circumstances. Concurrently with the closing of the proposed offer, UraMin will declare a dividend payable in shares of the capital of Niger Uranium Limited held by UraMin (where permitted by law) or a cash equivalent of the value of such shares.

  17. DMT - Areva's steam generator maintenance cleaning process concept and experiences

    International Nuclear Information System (INIS)

    Steam generators (SGs) are one of the key components for plant performance and plant availability of nuclear power plants. Depending on numerous factors (e.g. material concept, water chemistry, operational procedures) a certain amount of metal oxides and impurities are transported into the SG's via the feed water. Accumulation of these deposits is intrinsic during the operation of steam generators in PWRs. In order to maintain the integrity or to maintain or regain the performance of the steam generators, chemical cleaning is an essential part of the asset management. Recently the industry moves from curative (removing all SG deposits with one chemical application) cleanings to preventive (i.e. maintenance - removal of a portion of the SG deposits with one chemical application) cleanings. The intention of such preventive cleanings is to maintain the deposit inventory on a low level or even better to reduce the deposit inventory by repeated applications. Preventive cleanings remove only a part of the sludge inventory during each application. Nevertheless such cleanings still need to be efficient and most of all it is mandatory that the corrosion is very low - not only to minimize steam generator base metal corrosion but also to increase the efficiency of the cleaning. The AREVA developed proprietary Deposit Minimization Treatment (DMT) technology uses a different chemistry than EDTA. The technical advantage provided by DMT's different chemistry, besides the innocuousness towards Ni-alloys and stainless steels, is its self-inhibiting property. The in situ formation of a protective layer on the carbon steel surfaces limits the average carbon steel corrosion during a typical chemical cleaning campaign to values far below 10 μm. Due to this very low carbon steel corrosion, less than 5 % of the dissolved iron originates from SG base metal corrosion, while this portion can be more than 30 % in a comparable uninhibited EDTA solution. The DMT process protective

  18. Narrow gap mechanised arc welding in nuclear components manufactured by AREVA NP

    International Nuclear Information System (INIS)

    Nuclear components require welds of irreproachable and reproducible quality. Moreover, for a given welding process, productivity requirements lead to reduce the volume of deposited metal and thus to use narrow gap design. In the shop, narrow gap Submerged Arc Welding process (SAW) is currently used on rotating parts in flat position for thicknesses up to 300 mm. Welding is performed with one or two wires in two passes per layer. In Gas Tungsten Arc Welding process (GTAW), multiple applications can be found because this process presents the advantage of allowing welding in all positions. Welding is performed in one or two passes per layer. The process is used in factory and on the nuclear sites for assembling new components but also for replacing components and for repairs. Presently, an increase of productivity of the process is sought through the use of hot wire and/or two wires. Concerning Gas Metal Arc Welding process (GMAW), its use is growing for nuclear components, including narrow gap applications. This process, limited in its applications in the past on account of the defects it generated, draws benefit from the progress of the welding generators. Then it is possible to use this efficient process for high security components such as those of nuclear systems. It is to be noted that the process is applicable in the various welding positions as it is the case for GTAW, while being more efficient than the latter. This paper presents the state of the art in the use of narrow gap mechanised arc welding processes by AREVA NP units. (author)

  19. Areva's Actiflo trademark -Rad water treatment system for the Fukushima nuclear power plant

    International Nuclear Information System (INIS)

    In the wake of the March 11th 2011 earthquake and tsunami and the subsequent flooding of several of the Fukushima Daiichi reactor units, Japan and the Japanese utility Tepco faced a crisis situation with incredible challenges. Sea water and later desalted sea water used for open circuit post-accident reactor cooling accumulated in the basements of four reactor buildings as well as in the basements of the turbine buildings on the site. The water had been heavily contaminated due to the fact that it had been in contact with molten fuel assemblies in the reactor cores. The water from flooding and subsequent cooling needed to be collected, along with rainwater. Despite the use of additional water storage systems brought to the site, a shortage of water storage capacity was expected in a 3-month timeframe, especially in view of the coming rain season in Japan. The overall water inventory was estimated at around 110,000 tons with a contamination up to the order of 1 Ci/l (3.7 x 1010 Bq/l). To avoid an over-flow of highly contaminated water into the sea Tepco envisaged establishing a water treatment system. This article focuses on the Actiflo trademark -Rad water treatment project implemented by Areva as part of the Tepco general water treatment scheme. It presents a detailed look at the functional principle of the Actiflo trademark -Rad process, related on-the-fly research and development, an explanation of system implementation challenges and a brief summary of operation results. (orig.)

  20. AREVA Technical Days (ATD) session 2: operations of the back-end of the nuclear fuel cycle

    International Nuclear Information System (INIS)

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This second session deals with the reprocessing business, back-end financing mechanisms, technology transfer, environmental management, risk management programs, research and development contribution to waste volume reductions, issues and outlook of nuclear wastes, comparison of the open and closed cycles. (A.L.B.)

  1. On pseudorandom generators in NC0

    DEFF Research Database (Denmark)

    Cryan, Mary; Miltersen, Peter Bro

    2001-01-01

    In this paper we consider the question of whether NC 0 circuits can generate pseudorandom distributions. While we leave the general question unanswered, we show – • Generators computed by NC 0 circuits where each output bit depends on at most 3 input bits (i.e, DNC 3 0 circuits) and with stretch....... – • There is an NC 4 0 generator with a super-linear stretch that passes the linear dependency test as well as k-wise independence tests, for any constant k....

  2. Non-leptonic kaon decays at large $N_c$

    CERN Document Server

    Donini, A; Pena, C; Romero-López, F

    2016-01-01

    We study the scaling with the number of colours, $N_c$, of the weak amplitudes mediating kaon mixing and decay. We evaluate the amplitudes of the two relevant current-current operators on the lattice for $N_c=3-7$. We conclude that the subleading $1/N_c$ corrections in $\\hat{B}_K$ are small, but those in the $K \\rightarrow \\pi\\pi$ amplitudes are large and fully anti-correlated in the $I=0, 2$ isospin channels. We briefly comment on the implications for the $\\Delta I=1/2$ rule.

  3. Lattice study of large $N_c$ QCD

    CERN Document Server

    DeGrand, Thomas

    2016-01-01

    We present a lattice simulation study of large $N_c$ regularities of meson and baryon spectroscopy in $SU(N_c)$ gauge theory with two flavors of dynamical fundamental representation fermions. Systems investigated include $N_c=2$, 3, 4, and 5, over a range of fermion masses parametrized by a squared pseudoscalar to vector meson mass ratio between about 0.2 to 0.7. Good agreement with large $N_c$ scaling is observed in the static potential, in meson masses and decay constants, and in baryon spectroscopy.

  4. Large Nc from Seiberg-Witten curve and localization

    Science.gov (United States)

    Russo, Jorge G.

    2015-09-01

    When N = 2 gauge theories are compactified on S4, the large Nc limit then selects a unique vacuum of the theory determined by saddle-point equations, which remains determined even in the flat-theory limit. We show that exactly the same equations can be reproduced purely from Seiberg-Witten theory, describing a vacuum where magnetically charged particles become massless, and corresponding to a specific degenerating limit of the Seiberg-Witten spectral curve where 2Nc - 2 branch points join pairwise giving aDn = 0, n = 1 , … ,Nc - 1. We consider the specific case of N = 2 SU (Nc) SQCD coupled with 2Nf massive fundamental flavors. We show that the theory exhibits a quantum phase transition where the critical point describes a particular Argyres-Douglas point of the Riemann surface.

  5. 78 FR 49317 - North Carolina Disaster # NC-00054

    Science.gov (United States)

    2013-08-13

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00054 AGENCY: U.S. Small Business Administration. ACTION: Notice.... Small Business Administration, Processing And Disbursement Center, 14925 Kingsport Road, Fort Worth,...

  6. Research on Visual Virtual Design Platform for NC Machine Tools

    Institute of Scientific and Technical Information of China (English)

    HU Rufu; CHEN Xiaoping; SUN Qinghong

    2006-01-01

    The fundamental ideas on building the collaborative design platform of virtual visualization for NC machine tools are introduced. The platform is based on the globally shared product model conforming to the STEP Standard, and used PDM system to integrate and encapsulate CAD/CAE and other application software for the product development. The platform also integrated the expert system of NC machine tools design, analysis and estimation. This expert system utilized fuzzy estimation principle to evaluate the design and simulation analysis results and make decisions. The platform provides the collaborative intelligent environment for the design of virtual NC machine tools prototype aiming at integrated product design team. It also supports the customized development of NC machine tools.

  7. Observations of NC stop nets for bottlenose dolphin takes

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — To observe the NC stop net fishery to document the entanglement of bottlenose dolphins and movement of dolphins around the nets.

  8. Dynamic characteristics of an NC table with phase space reconstruction

    Institute of Scientific and Technical Information of China (English)

    Linhong WANG; Bo WU; Runsheng DU; Shuzi YANG

    2009-01-01

    The dynamic properties of a numerical control (NC) table directly interfere with the accuracy and surface quality of work pieces machined by a computer numerical control (CNC) machine. Phase space reconstruction is an effective approach for researching dynamic behaviors of a system with measured time series. Based on the theory and method for phase space reconstruction, the correlation dimension, maximum Lyapunov exponent, and dynamic time series measured from the NC table were analyzed. The characteristic quantities such as the power spectrum, phase trajectories, correlation dimension, and maximum Lyapunov exponent are extracted from the measured time series. The chaotic characteristic of the dynamic properties of the NC table is revealed via various approaches.Therefore, an NC table is a nonlinear dynamic system. This research establishes a basis for dynamic system discrimi-nation of a CNC machine.

  9. AREVA coating and adhesive technology. A method to mitigate and/or prevent leaks in pools with stainless steel liners

    Energy Technology Data Exchange (ETDEWEB)

    Kraemer, Georg [AREVA NP GmbH, Erlangen (Germany)

    2011-07-01

    Worldwide experience shows that stainless steel liners of concrete pools tend to leak primarily due to corrosion phenomena, although weld failure leakage can also occur. Extensive investigations by AREVA showed that mechanical defects are usually caused by mechanical impact and that the affected location is obvious. However, in the case of corrosion, which is the root cause in most of the cases, the defect in the liner begins from the concrete side and is only detected when a complete penetration occurs. Therefore, in the case of corrosion defects, it is not only vital to identify the location and repair the actual leak, but it is advantageous to apply a technology that works as a preventive measure. Repair methods based on conventional welding techniques are not promising as a preventive measure, mostly due to cost and time issues. With the AREVA coating and adhesive technology, a repair method is provided which is able to stop existing leaks. It also works as a prophylactic measure against future penetration from the concrete side of the pool. This technique covers the failure mechanisms from weld failures over corrosion to mechanical stresses. A further advantage of the coating and adhesive technology is the possibility to use remote-controlled underwater repair methods. These are particularly beneficial in the repair of leaks in spent fuel pools. Extensive laboratory testing and longstanding successful experience in nuclear power plants have proven the suitability of the coating and adhesive technology as an active and proactive method to minimize leakages in pools. (orig.)

  10. Synthesis, thermolysis, and sensitivities of HMX/NC energetic nanocomposites.

    Science.gov (United States)

    Wang, Yi; Song, Xiaolan; Song, Dan; Liang, Li; An, Chongwei; Wang, Jingyu

    2016-07-15

    1,3,5,7-Tetranittro-1,3,5,7-tetrazocane/nitrocellulose (HMX/NC) nanocomposites were successfully synthesized by an improved sol-gel-supercritical method. NC nanoparticles with a size of ∼30nm were cross-linked to form a network structure, and HMX nanoparticles were imbedded in the nano-NC matrix. The key factors, i.e., the selection of catalyst and solvent, were probed. No phase transformation of the HMX occurred before or after fabrication, and the molecular structures of the HMX and NC did not change. Thermal analyses were performed, and the kinetic and thermodynamic parameters, such as activation energy (EK), per-exponent factor (lnAK), rate constant (k), activation heat (ΔH(≠)), activation free energy (ΔG(≠)), activation entropy (ΔS(≠)), critical temperature of thermal explosion (Tb), and critical heating rate of thermal explosion (dT/dt)Tb, were calculated. The results indicate that HMX/NC presented a much lower activation energy (165.03kJ/mol) than raw HMX (282.5kJ/mol) or raw NC (175.51kJ/mol). The chemical potential (ΔG(≠)) for the thermal decomposition of HMX/NC has a positive value, which means that the activation of the molecules would not proceed spontaneously. The significantly lower ΔH(≠) value of HMX/NC, which represents the heat needed to be absorbed by an explosive molecule to change it from its initial state to an activated state, implies that the molecules of HMX/NC are much easier to be activated than those of raw HMX. Similarly, the HMX/NC presented a much lower Tb (168.2°C) than raw HMX (283.2°C). From the results of the sensitivity tests, the impact and friction sensitivities of HMX/NC were significantly decreased compared with those of raw HMX, but the thermal sensitivity was distinctly higher. The activation of the particles under external stimulation was simulated, and the mechanism was found to be crucial. Combining the thermodynamic parameters, the mechanism as determined from the results of the sensitivity tests was

  11. precision deburring using NC and robot equipment. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Gillespie, L.K.

    1980-05-01

    Deburring precision miniature components is often time consuming and inconsistent. Although robots are available for deburring parts, they are not precise enough for precision miniature parts. Numerical control (NC) machining can provide edge break consistencies to meet requirements such as 76.2-..mu..m maximum edge break (chamfer). Although NC machining has a number of technical limitations which prohibits its use on many geometries, it can be an effective approach to features that are particularly difficult to deburr.

  12. Nonlinear Absorption Properties of nc-Si:H Thin Films

    Institute of Scientific and Technical Information of China (English)

    GUO Zhenning; GUO Hengqun; LI Shichen; HUANG Yongzhen; WANG Qiming

    2001-01-01

    It is reported in this paper that the phenomenon of the saturated absorption of the exciton in hydrogenated nanocrystalline silicon (nc-Si:H) thin film fabricated by plasma enhanced chemical vapor deposition (PECVD) without any post-processing is observed at room temperature using pump-probe technology. This nonlinear optical absorption property is induced by the surface effect of the silicon nanoparticles in nc-Si:H thin films.

  13. Vanishing chiral couplings in the large-Nc resonance theory

    OpenAIRE

    Portolés, Jorge; Rosell, Ignasi; Ruiz Femenía, Pedro

    2007-01-01

    The construction of a resonance theory involving hadrons requires implementing the information from higher scales into the couplings of the effective Lagrangian. We consider the large-Nc chiral resonance theory incorporating scalars and pseudoscalars, and we find that, by imposing LO short-distance constraints on form factors of QCD currents constructed within this theory, the chiral low-energy constants satisfy resonance saturation at NLO in the 1/Nc expansion.

  14. AREVA General Inspectorate Annual Report 2013 - Status of safety in nuclear facilities

    International Nuclear Information System (INIS)

    This annual report by AREVA's General Inspectorate deals with the status of nuclear safety and radiation protection in the group's facilities and operations over the course of 2013. Based on the findings made during implementation of the annual inspection program, this annual report also includes the results of the analysis of significant events and the observations and assessments of specialists in the Safety Health Security Sustainable Development Department (SHSSDD), supplemented by regular interaction with the safety regulators, different government agencies, stakeholders and other nuclear operators. Additionally, this report presents the action plans put into motion and the directions taken for continuous improvement in risk prevention for operations conducted in France and internationally. In 2013, the level of safety in the group's nuclear facilities and operations remained satisfactory, although improvements are necessary in some domains. This report is based on established indicators, analyses of reported events, responses to commitments made to the regulators, and the results of different improvement actions reported on in the inspected and supported entities. In 2013, no level 2 event on the International Nuclear and Radiological Event Scale (INES) was reported, the bottom-up reporting of weak signals was confirmed, dose levels were low and there were no radiological impacts on the environment. The General Inspectorate conducted 45 inspections in 30 of the group's entities in 2013. Of these, 10 concerned sites outside France and 7 were conducted following events or particular situations. These inspections gave rise to 176 recommendations, which the inspected entities have translated into action plans. Verification of these different action plans according to planned procedures and announced schedules gave rise to 16 follow-up inspections. The major lessons learned from these inspections relate to project management, facility compliance and operational

  15. Nc-Si Thin Film Deposited at Low Temperature and Nc-Si Heterojunction Solar Cell

    Institute of Scientific and Technical Information of China (English)

    赵占霞; 崔容强; 孟凡英; 于化丛; 周之斌

    2004-01-01

    This paper reported some results about intrinsic nanocrystalline silicon thin films deposited by high frequency (HF) sputtering on p-type c-Si substrates at low temperature. Samples were examined by atomic force microscopy (AFM), X-ray diffraction (XRD), infrared absorption, and ellipsometry. XRD measurements show that this film has a new microstructure, which is different from the films deposited by other methods. The ellipsometry result gives that the optical band gap of the film is about 2.63 eV. In addition, the n-type nc-Si ∶ H/p-type c-Si heterojunction solar cell, which has open circuit voltage (Uoc) of 558 mV and short circuit current intensity (Isc) of 29 mA/cm2, was obtained based on the nanocrystalline silicon thin film. Irradiated under AM1.5, 100 mW/cm2 light intensity, the Uoc, Isc, and FF can keep stable for 10 h.

  16. Control and maintenance of the Superphenix knowledge and its specific sodium skills through an innovative partnership between EDF and AREVA

    International Nuclear Information System (INIS)

    Superphenix is a 1200 MWe sodium cooled Fast Breeder Reactor (FBR) located in Creys-Malville (France). Its grid coupling occurred in 1986 and its final shutdown pronounced through a decree, 12 years later, in 1998. This Superphenix final shutdown decision marked a new stage in the life of the nuclear plant. Decommissioning activities were highly challenging due to the following: - Non recurrent and first-of-a-kind (FOAK) characteristics; - Environment constraints: radiation level, high temperatures, presence of argon, sodium, NaK, soda, hydrogen, etc.; - Complexity of the primary vessel internal structures; - Numerous interfaces to manage; - Numerous technical uncertainties due to the difficulty in anticipating the effective state of components (sodium and aerosols retentions, tritium concentration, NaK alteration, etc.). At the end of 1998, exchanges took place between EDF as 'Superphenix nuclear operator' and AREVA as 'Superphenix Nuclear Steam System Supply (NSSS) designer' in order to find the best way to meet the new challenge of decommissioning Superphenix. A key ingredient to achieving success was to ensure that existing local and specific sodium skills were controlled and maintained. AREVA was selected by EDF as its industrial partner for the sodium activities on this project being entrusted with the following missions: - Maintaining and adapting a strong EDF / AREVA partnership within the project duration; - Supplying support as the 'NSSS Designer'; - Rolling-out multidisciplinary skills from the design to the on-site operations; - Relying on its best technical experts to solve each technical challenge; - Developing and adapting durable specific skills of its technical team (sodium, mechanical, process, I and C, statutory, etc.) following each stage of the decommissioning. This EDF/AREVA partnership on the sodium activities has taken different forms according to the different stages of the project. From 1998 to 2005, AREVA was

  17. Zirconia (NC) zircon as a potential standard

    Science.gov (United States)

    Covey, A. K.; Braun, S. A.; Gualda, G. A.; Bream, B. R.; Fisher, C.; Wooden, J. L.; Schmitz, M. D.

    2012-12-01

    As microanalysis continues to advance and become more widespread there is a greater need for abundant and suitable age standards. Megacrystic zircons from the inactive Freeman Mine near Zirconia, NC were collected from weathered mine dump piles. Zirconia zircon crystals are large (> 1 mm) relative to typical zircons (up to 100s μm) and easily obtained; attributes that make them attractive as a potential standard. We present here preliminary data and assess the suitability of Zirconia zircons as a U-Pb geochronology, Hf-isotope and trace-element standard. Grains are variably fluorescent (Callahan et al, Southeastern Geol., 2007), and we used shortwave fluorescence to separate grains with high, medium, low/no fluorescence from one another. Images were taken of the grains before mounting and post-polishing to understand the fluorescence characterization of the surface to the core. After preparing the grains, we found that the fluorescence was not homogenous and did not provide a good means of separating out grains. In order to investigate the differences in fluorescence, we collected cathodoluminescence (CL) and backscatter electron (BSE) images and energy dispersive spectroscopy (EDS) maps using a Tescan Vega 3 LMU equipped with an Oxford X-max 50 mm2 solid-state EDS detector at Vanderbilt University. This allowed division of the grains into two types: (a) grains with finely oscillatory zoned rims, which are variably crosscut by dull-CL irregular zones, sometimes showing hourglass zoning; and (b) grains with cores showing more irregular, patchy zoning with and without thin oscillatory rims. EDS maps show no major element zoning in the zircon grains, but reveal a variety of inclusions, particularly of quartz and thorite. Preliminary U-Pb ages were obtained using a Perkin Elmer Elan DRCII ICP-MS coupled with a New Wave/Mechantek 213 nm Nd:YAG laser ablation system at Vanderbilt University. A total of ~150 individual ages on oscillatory-zoned (Type a) crystals yield a

  18. AREVA NP Inc next generation fresh UO2 fuel assembly shipping cask: SCALE - CRISTAL comparisons lead to safety criticality confidence

    International Nuclear Information System (INIS)

    AREVA NP as a worldwide PWR fuel provider has to have a fleet of fresh UO2 shipping casks being agreed within a lot of countries including USA (France), Germany, Belgium, Sweden, China, and South Africa... and to accommodate foreseen EPR Nuclear Power Plants fuel buildings. To reach this target the AREVA NP Fuel Sector decided to develop an up to date shipping cask gathering experience feedback of the today fleet and an improved safety allowing the design to comply with international regulations (NRC and IAEA) and local Safety Authorities. Based on pre design features a safety case was set up to highlight safety margins. Criticality hypothetical accidental assumptions were defined: -Preferential flooding - Fuel rod lattice pitch expansion for full length of fuel assemblies - Neutron absorber penalty -... Well known computer codes, American SCALE package and French CRISTAL package, were used to check configurations reactivity and to ensure that both codes lead to coherent results. Basic spectral calculations are based on similar algorithms with specific microscopic cross sections ENDF/BV for SCALE and JEF2.2 for CRISTAL. The main differences between the two packages is on one hand SCALE's three dimensional fuel assembly geometry is described by a pin by pin model while an homogenized fuel assembly description is used by CRISTAL and on the other hand SCALE is working with either 44 or 238 neutron energy groups while CRISTAL is with a 172 neutron energy groups. Those two computer packages rely on a wide validation process helping defining uncertainties as required by regulations in force. The shipping cask with two fuel assemblies is designed to maximize fuel isolation inside a cask and with neighboring ones even for large array configuration cases. Proven industrial products are used: - BoralTM as neutron absorber - High density polyethylene (HDPE) or Nylon as neutron moderator - Foam as thermal and mechanical protection The cask is designed to handle the complete

  19. AREVA NP next generation fresh UO2 fuel assembly shipping cask: SCALE - CRISTAL comparisons lead to safety criticality confidence

    International Nuclear Information System (INIS)

    AREVA NP as a worldwide PWR fuel provider has to have a fleet of fresh UO2 shipping casks being agreed within a lot of countries including USA, France, Germany, Belgium, Sweden, China, and South Africa - and to accommodate foreseen EPR Nuclear Power Plants fuel buildings. To reach this target the AREVA NP Fuel Sector decided to develop an up-to-date shipping cask (so called MAP project) gathering experience feedback of the today fleet and an improved safety allowing the design to comply with international regulations (NRC and IAEA) and local Safety Authorities. Based on pre design features a safety case was set up to highlight safety margins. Criticality hypothetical accidental assumptions were defined: - Preferential flooding; - Fuel rod lattice pitch expansion for full length of fuel assemblies; - Neutron absorber penalty; -... Well known computer codes, American SCALE package and French CRISTAL package, were used to check configurations reactivity and to ensure that both codes lead to coherent results. Basic spectral calculations are based on similar algorithms with specific microscopic cross sections ENDF/BV for SCALE and JEF2.2 for CRISTAL. The main differences between the two packages is on one hand SCALE's three dimensional fuel assembly geometry is described by a pin by pin model while an homogenized fuel assembly description is used by CRISTAL and on the other hand SCALE is working with either 44 or 238 neutron energy groups while CRISTAL is with a 172 neutron energy groups. Those two computer packages rely on a wide validation process helping defining uncertainties as required by regulations in force. The shipping cask with two fuel assemblies is designed to maximize fuel isolation inside a cask and with neighboring ones even for large array configuration cases. Proven industrial products are used: - BoralTM as neutron absorber; - High density polyethylene (HDPE) or Nylon as neutron moderator; - Foam as thermal and mechanical protection. The cask is

  20. The AREVA integrated and sustainable concept of fatigue design, monitoring and re-assessment; AREVA FATIGUE CONCEPT - ein geschlossenes Konzept zur Verfolgung und Optimierung der auf Ermuedung basierenden Schaedigungseffekte von thermisch und mechanisch beanspruchten Kraftwerksbauteilen

    Energy Technology Data Exchange (ETDEWEB)

    Begholz, Steffen; Rudolph, Juergen [AREVA NP GmbH, Erlangen (Germany)

    2008-07-01

    Prevention of fatigue damage of components is an important topic with respect to safety and availability of a nuclear power plant. The issue of fatigue monitoring should be of primary interest throughout service life. Based on the changing general framework, i.e. planning of new plants with a projected lifetime of 60 years and the lifetime extension of existing plants AREVA is focussing R and D activities on improved detection methods. Primary objective is the realistic determination of the actual usage level of reactor components. The fatigue monitoring is supposed to enhance cost optimization and minimize inspection frequency. Fatigue monitoring should be implemented at the beginning of start-up period since the high loads during this phase introduce a significant contribution to the usage level. AREVA recommends the use of the FAMOS (fatigue monitoring system) for the assessment of the realistic transient loads and the data processing with respect to fatigue evaluation. Every 10 years the actual usage levels should be evaluated in detail according to the standards, based on measured load data. The fatigue evaluation is usually performed using finite element analyses taking into account the transient temperature loads at the component, dependent on the component demands based on elastic or elasto-plastic material behaviour. Potential problematic areas can be identified reliably. Direct measurement of fatigue damage, refined analysis concepts (short crack fracture mechanics, and ratcheting simulation) are supposed to support the concept. [German] Die Vermeidung von Ermuedungsschaeden an Komponenten der nuklearen Kraftwerkstechnik ist ein wichtiges Thema in Hinblick auf die Aufrechterhaltung der Anlagensicherheit sowie auf die Erhoehung der Verfuegbarkeit. Das Thema Ermuedungsueberwachung sollte somit waehrend der gesamten Laufzeit eines Kraftwerkes mit hoher Aufmerksamkeit verfolgt werden. Vor diesem Hintergrund und den sich aendernden Rahmenbedingungen, wie z

  1. Information report on nuclear safety and radiation protection of the Tricastin AREVA site - Issue 2013. Figures and information about nuclear safety and radiation protection of the Tricastin AREVA site - Issue 2013

    International Nuclear Information System (INIS)

    Published in compliance with the French code of the environment, this report first presents different aspects of the Areva's Tricastin site which comprises five basic nuclear installations or INBs, and seven ICPE (installation classified for the protection of the environment). The activities are dedicated to uranium conversion, uranium enrichment, uranium chemistry, industrial services, and fuel manufacturing. The report presents this important industrial site, describes the various measures regarding nuclear safety and radiation protection, reports nuclear events which occurred on this site and had to be declared, reports the management of releases by this site and the control of the environment. The next part addresses the management of the various wastes produced by the different installations present on this site. The management of other impacts is also reported. The last chapter reviews the actions undertaken in the field of transparency and information

  2. 'Action 2016': AREVA's strategic action plan to improve performance; 'Action 2016': le plan d'actions strategique d'AREVA pour ameliorer sa performance

    Energy Technology Data Exchange (ETDEWEB)

    Marie, Patricia; Floquet-Daubigeon, Fleur; Michaut, Maxime; De Scorbiac, Marie; Du Repaire, Philippine

    2011-12-12

    On December 12, 2011, Luc Oursel, Executive Officer of AREVA, and Pierre Aubouin, Chief Financial Executive Officer, presented the group's 'Action 2016' strategic action plan based on an in-depth analysis of the market's outlook. This document makes, first, a Detailed presentation of the 'Action 2016' plan and then presents the group's financial outlook: - Full-year 2011 immediate accounting consequences of the new market environment: operating losses expected in 2011; - 2012-2013 transition period Objective: self-finance capex in cumulative terms; - 2014-2016: safe growth and cash generation, free operating cash flow at break-even beginning in 2013, above euro 1 bn per year beginning in 2015

  3. Eikonal gluon radiation at finite-Nc beyond 2 loops

    CERN Document Server

    Khelifa-Kerfa, Kamel

    2015-01-01

    We present first calculations of QCD matrix-elements in perturbation theory at finite Nc beyond 2 loops in the eikonal approximation for e+ e- annihilation processes. For the emission of n soft energy-ordered gluons we solve both the colour and kinematic structures at a given order in perturbation theory by means of a Mathematica program that relies solely on a recently developed Mathematica code, ColorMath, that evaluates the trace of products of colour matrices. At large Nc, our squared amplitudes reduce to those already known in the literature.

  4. Shear viscosity from a large-Nc NJL model

    International Nuclear Information System (INIS)

    We investigate the shear viscosity to entropy ratio within the vicinity of the chiral phase transition/crossover using the NJL model in a large-Nc expansion. As heavy-ion collisions at RHIC and LHC in combination with hydrodynamic simulations suggest, this ratio is close to the AdS/CFT benchmark. This indicates a strongly correlated state of matter produced in such collisions. We study in detail the non-perturbative structure of the NJL model and the question if resummation techniques are required. In the large-Nc expansion next-to-leading-order contributions to the shear viscosity are derived.

  5. O(Nc) and USp(Nc) QCD from String Theory

    Science.gov (United States)

    Imoto, T.; Sakai, T.; Sugimoto, S.

    2009-12-01

    We propose a holographic dual of large N_c quantum chromodynamics (QCD) with the gauge groups O(N_c) and USp(N_c) and N_f flavors of massless quarks. This is constructed by adding O6-planes to an intersecting D4-D8 system in type IIA superstring theory. The holographic dual description is formulated in Witten's D4-brane background with D8-branes and O6-planes embedded in it as probes. The D4-brane background gives rise to a smooth interpolation of D8-overline{D8} pairs and an O6-overline{O6} pair. We show that the resultant brane configuration explains geometrically the flavor symmetry breaking patterns in O(N_c) and USp(N_c) QCD, which are caused by quark bilinear condensates. We next discuss that baryons can be realized as D4-overline{D4} pairs wrapped on S^4, which intersect with the O6-plane. By analyzing the tachyons on it, we reproduce the stability conditions of the baryons that are expected from the gauge theory viewpoint . The stable baryon configurations are classified systematically using K-theory. We also give a similar analysis of the flux tubes and again reproduce the results that are consistent with QCD.

  6. Highly conducting and preferred oriented boron doped nc-Si films for window layers in nc-Si solar cells

    Science.gov (United States)

    Mondal, Praloy; Das, Debajyoti

    2016-05-01

    Growth and optimization of the boron dopednanocrystalline silicon (nc-Si) films have been studied by varyingthe gaspressure applied to the hydrogendiluted silane plasma in RF (13.56 MHz) plasma-enhanced chemical vapor deposition (PECVD) system, using diborane (B2H6) as the dopant gas. High magnitudeof electrical conductivity (~102 S cm-1) andorientedcrystallographic lattice planes have been obtained with high crystalline volume fraction (~86 %) at an optimum pressure of 2.5 Torr. XRD and Raman studies reveal good crystallinity with preferred orientation, suitable for applications in stacked layer devices, particularly in nc-Si solar cells.

  7. 75 FR 65389 - North Carolina Disaster #NC-00030

    Science.gov (United States)

    2010-10-22

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00030 AGENCY: U.S. Small Business Administration. ACTION: Notice... Carolina (FEMA-1942-DR), dated 10/14/ 2010. Incident: Severe storms, flooding, and straight-line...

  8. 78 FR 12806 - North Carolina Disaster #NC-00048

    Science.gov (United States)

    2013-02-25

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00048 AGENCY: U.S. Small Business Administration. ACTION: Notice... INFORMATION CONTACT: A. Escobar, Office of Disaster Assistance, U.S. Small Business Administration, 409...

  9. 77 FR 56250 - North Carolina Disaster #NC-00044

    Science.gov (United States)

    2012-09-12

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00044 AGENCY: U.S. Small Business Administration. ACTION: Notice... Deadline Date: 06/05/2013. ADDRESSES: Submit completed loan applications to: U.S. Small...

  10. 77 FR 33997 - Television Broadcasting Services; Greenville, NC

    Science.gov (United States)

    2012-06-08

    ... COMMISSION 47 CFR Part 73 Television Broadcasting Services; Greenville, NC AGENCY: Federal Communications... Commission instituted a freeze on the acceptance of rulemaking petitions by full power television stations... petitions for rulemaking filed by full power television stations seeking to relocate from channel...

  11. 77 FR 46631 - Television Broadcasting Services; Greenville, NC

    Science.gov (United States)

    2012-08-06

    ... COMMISSION 47 CFR Part 73 Television Broadcasting Services; Greenville, NC AGENCY: Federal Communications... instituted a freeze on the acceptance of full power television rulemaking petitions requesting channel... 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Television. Federal...

  12. 78 FR 72009 - Establishment of Class E Airspace; Star, NC

    Science.gov (United States)

    2013-12-02

    ... Federal Register a notice of proposed rulemaking to establish Class E airspace at Star, NC (78 FR 54413... Policies and Procedures (44 FR 11034; February 26, 1979); and (3) does not warrant preparation of a... continues to read as follows: Authority: 49 U.S.C. 106(g); 40103, 40113, 40120; E.O. 10854, 24 FR 9565,...

  13. 76 FR 38018 - Safety Zone, Newport River; Morehead City, NC

    Science.gov (United States)

    2011-06-29

    ... standards are technical standards (e.g., specifications of materials, performance, design, or operation... in the Federal Register (33 FR 165). We received no comments on the proposed rule. No public meeting... Transportation awarded a contract to Astron General Contracting Company of Jacksonville, NC to perform...

  14. The biodistribution of NC100668 and the effect of excess NC100668 on the biodistribution and kidney retention of {sup 99m}Tc-NC100668 in the rat

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, David [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom)]. E-mail: davidedwards@ge.com; Lewis, Joanne [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Battle, Mark [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Lear, Rochelle [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Farrar, Gill [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Barnett, David J. [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Godden, Vanessa [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Edwards, Catherine [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Oliveira, Alexandra [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Ahlstroem, Hakan [Institution of Oncology, Radiology and Clinical Immunology, Section of Radiology, Uppsala University Hospital, SE-751 85 Uppsala (Sweden)

    2007-04-15

    Introduction: {sup 99m}Tc-NC100668 is being developed to aid the diagnosis of thromboemboli. The purpose of this study was to investigate if the presence of excess NC100668 interferes with the biodistribution and blood clot uptake of {sup 99m}Tc-NC100668. The secondary aim was to investigate the causes underlying the kidney retention of {sup 99m}Tc-NC100668. Methods: The uptake of a {sup 14}C-labelled analogue of NC100668, as well as {sup 99m}Tc-NC100668, into plasma (in vitro) and blood (in vivo) clots was determined. The biodistribution of {sup 99m}Tc-NC100668 at a range of NC100668 doses was studied in normal Wistar rats and those bearing experimentally induced deep venous thrombosis. The biodistribution of a negative control peptide and {sup 99m}Tc-NC100668 plus L-lysine was studied in healthy male Wistar rats. Results: The biodistribution as well as plasma clot uptake of [Asn-U-{sup 14}C]NC100668 and {sup 99m}Tc-NC100668 was similar. Apart from some reduction in kidney retention, the biodistribution and uptake of radioactivity into the blood clot were not significantly affected by the presence of up to 1000 times the clinical dose of NC100668. Kidney retention of radioactivity could be more effectively reduced by coadministration of 889 {mu}g/kg NC100668 than 450 mg/kg L-lysine. A negative control peptide with no affinity for FXIIIa demonstrated very little kidney retention. Conclusions: The biodistribution and blood clot uptake of {sup 99m}Tc-NC100668 and [Asn-U-{sup 14}C]NC100668 are similar. With the exception of the kidneys, {sup 99m}Tc-NC100668 biodistribution and blood clot uptake are unaffected by the presence of unlabelled NC100668. The kidney retention of radioactivity is probably due to transglutaminase activity and, to a lesser extent, nonspecific charge-mediated endocytosis.

  15. Impact of uranium exploitation by Cogema-Areva subsidiaries in Niger. Assessment of analyses performed by the CRIIRAD laboratory in 2004 and at the beginning of 2005

    International Nuclear Information System (INIS)

    After a description of the uranium exploitation context (involved companies, production) in Arlit, Niger, by Cogema-Areva subsidiary companies, this report describes the context of controls performed by the CRIIRAD laboratory. Then, it reports and comments the contamination of underground so-called drinkable waters (contamination risks, Cogema statement, detection of a rather high concentration of alpha emitters, measurements performed in 2004 and 2005). The authors notice that water contamination is known by Cogema. Then, the report analyzes the issue of contaminated scrap metal dispersal, comments and criticizes the attitude of Cogema with respect to the associated risks. It comments the uranate transport accident which occurred in February 2004, the subsequent contamination, actions performed by Cogema, the associated health risks, and the statements made by Areva and Cogema. It also comments and analyzes the risks related to radioactive radon dusts inhalation around different sites and because of some technical practices, and Cogema statements about this issue. In conclusion, the authors outline the need of reinforced controls and of an epidemiological study, and outlines how Areva propagates wrong ideas

  16. AREVA - Results for the first half of 2012: performance materializes as 'Action 2016' plan is rolled out

    International Nuclear Information System (INIS)

    The results for the first half of 2012 demonstrate the effectiveness of Areva's 'Action 2016' plan, in particular with a sharp rise in EBITDA and a significant improvement in free operating cash flow after capex. Moreover, net debt remains stable even though the Group invested more than 900 million euros in strategic projects and in improvements to safety and to competitiveness of industrial assets. Several factors made this first phase towards restoring the Group's financial performance possible: - revenue growth in the nuclear businesses together with the ramp-up of operations in renewable energies, with the Group continuing to benefit from the strong visibility provided by its backlog, which has also grown over the past twelve months; - ongoing efforts begun in late 2011 to reduce operating costs, with savings measures at the end of June 2012 implemented for nearly 20% of the objective set for the Group through 2015, on an annual basis, another 45% of the objective being secured in addition. - execution ahead of schedule in Areva's asset disposal program, with 961 million euros mainly collected during the first half year and the objective of at least 1.2 billion euros for the 2012- 2013 period to be met this year with the recently announced disposal of La Mancha Resources for about 315 million Canadian dollars. After booking provisions, in accordance with the principle of prudent management, in two areas (construction of the Olkiluoto 3 EPR reactor and the Bakouma and Ryst Kuil mining sites), the Group reports positive operating income and positive net income for the first half of 2012. Results can be summarized as follows: Backlog rises 4.8% year on year to euro 45.2 bn; - Significant revenue growth to euro 4.329 bn, up 8.3% vs. H1 2011; - Strong increase in EBITDA to euro 725 m: +euro 508 m vs. H1 2011; - Marked improvement in FCF to -euro 591 m: +euro 328 m vs. H1 2011; - Net debt stable for the half year; - Positive operating income and net income to owners

  17. Topics on heavy baryon chiral perturbation theory in the large N_c limit

    CERN Document Server

    Flores-Mendieta, R

    2002-01-01

    We compute nonanalytical pion-loop corrections to baryon masses in a combined expansion in chiral symmetry breaking and 1/N_c, where N_c is the number of colors. Specifically, we compute flavor-27 baryon mass splittings at leading order in chiral perturbation theory. Our results, at the physical value N_c=3, are compared with the expressions obtained in heavy baryon chiral perturbation theory with no 1/N_c expansion.

  18. Baryon Isovector Electric Properties and the Large N_c and Chiral Limits

    OpenAIRE

    Cohen, Thomas D.

    1995-01-01

    A model independent calculation is given for the nucleon isovector electric charge radius which is valid in the limit $N_c \\rightarrow \\infty$, $m_\\pi \\rightarrow 0$, $N_c m_\\pi$ fixed. This expression reduces to that of the Skyrme model in the limit $N_c m_{\\pi} \\rightarrow \\infty$.

  19. Series Design of Large-Scale NC Machine Tool

    Institute of Scientific and Technical Information of China (English)

    TANG Zhi

    2007-01-01

    Product system design is a mature concept in western developed countries. It has been applied in war industry during the last century. However, up until now, functional combination is still the main method for product system design in China. Therefore, in terms of a concept of product generation and product interaction we are in a weak position compared with the requirements of global markets. Today, the idea of serial product design has attracted much attention in the design field and the definition of product generation as well as its parameters has already become the standard in serial product designs. Although the design of a large-scale NC machine tool is complicated, it can be further optimized by the precise exercise of object design by placing the concept of platform establishment firmly into serial product design. The essence of a serial product design has been demonstrated by the design process of a large-scale NC machine tool.

  20. Large Nc from Seiberg–Witten curve and localization

    Directory of Open Access Journals (Sweden)

    Jorge G. Russo

    2015-09-01

    Full Text Available When N=2 gauge theories are compactified on S4, the large Nc limit then selects a unique vacuum of the theory determined by saddle-point equations, which remains determined even in the flat-theory limit. We show that exactly the same equations can be reproduced purely from Seiberg–Witten theory, describing a vacuum where magnetically charged particles become massless, and corresponding to a specific degenerating limit of the Seiberg–Witten spectral curve where 2Nc−2 branch points join pairwise giving aDn=0, n=1,…,Nc−1. We consider the specific case of N=2 SU(Nc SQCD coupled with 2Nf massive fundamental flavors. We show that the theory exhibits a quantum phase transition where the critical point describes a particular Argyres–Douglas point of the Riemann surface.

  1. NC Lathe Training System Based on the Web

    Institute of Scientific and Technical Information of China (English)

    卢碧红; 黄文丽; 葛研军

    2004-01-01

    Based on an analysis of the requirement of network-oriented NC lathe training system, a general framework of web-based training system is established. The key techniques for establishing this system include a three-layer web structure in building the general framework, the technique of VRML to model a virtual operating environment, and the access to the database using the ASP technique.

  2. Steam turbine generators -from NC manufacturing to CAD/CAM

    Energy Technology Data Exchange (ETDEWEB)

    Searle, D.R.; King, F.E.; Kiniskern, J.M.

    1985-04-01

    A program has been designed to integrate engineering, manufacturing, and business systems using a common data base. There has been a significant increase in benefits obtained by extending the automation of the design/drafting function to include manufacturing operations. This extension would have been difficult without the existence of highly developed family-of-parts NC programs. The integration concept has also been applied to turbine buckets and is being extended to other turning-generator components.

  3. A hybrid approach to automatic generation of NC programs

    OpenAIRE

    G. Payeganeh; M. Tolouei-Rad

    2005-01-01

    Purpose: This paper describes AGNCP, an intelligent system for integrating commercial CAD and CAM systems for 2.5D milling operations at a low cost.Design/methodology/approach: It deals with different machining problems with the aid of two expert systems. It recognizes machining features, determines required machining process plans, cutting tools and parameters necessary for generation of NC programs.Findings: The system deals with different machining problems with the aid of two expert syste...

  4. NC-Audit: Auditing for Network Coding Storage

    CERN Document Server

    Le, Anh

    2012-01-01

    Network coding-based storage has recently received a lot of attention thanks to its ability to efficiently repair failed nodes. Independently, another body of work has proposed integrity checking schemes for cloud storage, none of which, however, is customized for network coding storage or can efficiently support repair. In this work, we bridge the gap between these currently disconnected bodies of work, and we focus on the (novel) advantage of network coding for integrity checking. We propose NC-Audit - a remote data integrity checking scheme, designed specifically for network coding-based storage cloud. NC-Audit provides a unique combination of desired properties: (i) efficient checking of data integrity (ii) efficient support for repairing failed nodes (iii) full support for modification of outsourced data and (iv) protection against information leakage when checking is performed by a third party. The key ingredient of the design of NC-Audit is a novel combination of SpaceMac, a homomorphic MAC scheme for ...

  5. TRAC-PF1 post-test predictions for the Semiscale Natural-Circulation Tests S-NC-2 and S-NC-6

    International Nuclear Information System (INIS)

    The TRAC prediction are compared to the data for the Semiscale natural-circular Tests S-NC-2B and S-NC-6. S-NC-2B is a baseline test covering single- and two-phase natural circulation as well as reflux; here TRAC compares quite well with the experiment results for mass flow. For Test S-NC-6, which is a reflux test with various amounts of nitrogen injected into the system, the TRAC prediction of the reflux rate is close to the experiment value with no nitrogen in the system. Ultimately, the maximum reflux rate predicted by TRAC is about 20% higher than the data

  6. Model of automated computer aided NC machine tools programming

    Directory of Open Access Journals (Sweden)

    J. Balic

    2006-04-01

    Full Text Available Purpose: Modern companies tend towards the greatest possible automation in all areas. The new control concepts of manufacturing processes required development of adequate tools for the introduction of automated control in a certain area. The paper presents such system for automated programming of CNC machine tools.Design/methodology/approach: The system is based on the previously incorporated know-how and the rules of it implementation in tool – shop. The existing manufacturing knowledge of industry tool production was collected and analysing. On this bases flow chart of all activities were made. Theoretical contribution is made in systemization of technological knowledge, which is now accessible for all workers in NC preparation units.Findings: Utilization of technology knowledge. On the basis of the recognized properties it has worked out the algorithms with which the process of manufacture, the tool and the optimum parameters selected are indirectly determined, whereas the target function was working out of the NC programme. We can first out that with information approaching of the CAM and CAPP the barriers between them, strict so far, disappear.Research limitations/implications: Till now, the system is limited to milling, drilling and similar operation. It could be extended to other machining operations (turning, grinding, wire cutting, etc. with the same procedure. In advanced, some methods of artificial intelligence could be use.Practical implications: It is suitable for industry tools, dies and moulds production, while the system was proved in the real tool shop (production of tools for casting. The system reduces the preparation time of NC programs and could be used with any commercial available CAD/CAM/NC programming systems. Human errors are avoid or at lover level. It is important for engineers in CAD/CAM field and in tool – shops.Originality/value: The developed system is original and was not found in the literature or in the

  7. The NC (numerically controlled) assistant: Interfacing knowledge based manufacturing tools to CAD/CAM systems

    Energy Technology Data Exchange (ETDEWEB)

    Burd, W.C.

    1988-01-01

    A knowledge based computer program that assists programmers of numerically controlled (NC) machine tools is described. The program uses part features identified by the NC programmer and a set of expert system manufacturing rules to select cutting parameters and produce NC part programs. An expert system shell determines the NC sequence and the machining parameters. Several point-to-point NC functions are currently in production. A CAD/CAM system interface for milling and turning functions is also described. 2 refs., 24 figs.

  8. Classification of ncRNAs using position and size information in deep sequencing data

    Science.gov (United States)

    Erhard, Florian; Zimmer, Ralf

    2010-01-01

    Motivation: Small non-coding RNAs (ncRNAs) play important roles in various cellular functions in all clades of life. With next-generation sequencing techniques, it has become possible to study ncRNAs in a high-throughput manner and by using specialized algorithms ncRNA classes such as miRNAs can be detected in deep sequencing data. Typically, such methods are targeted to a certain class of ncRNA. Many methods rely on RNA secondary structure prediction, which is not always accurate and not all ncRNA classes are characterized by a common secondary structure. Unbiased classification methods for ncRNAs could be important to improve accuracy and to detect new ncRNA classes in sequencing data. Results: Here, we present a scoring system called ALPS (alignment of pattern matrices score) that only uses primary information from a deep sequencing experiment, i.e. the relative positions and lengths of reads, to classify ncRNAs. ALPS makes no further assumptions, e.g. about common structural properties in the ncRNA class and is nevertheless able to identify ncRNA classes with high accuracy. Since ALPS is not designed to recognize a certain class of ncRNA, it can be used to detect novel ncRNA classes, as long as these unknown ncRNAs have a characteristic pattern of deep sequencing read lengths and positions. We evaluate our scoring system on publicly available deep sequencing data and show that it is able to classify known ncRNAs with high sensitivity and specificity. Availability: Calculated pattern matrices of the datasets hESC and EB are available at the project web site http://www.bio.ifi.lmu.de/ALPS. An implementation of the described method is available upon request from the authors. Contact: florian.erhard@bio.ifi.lmu.de PMID:20823303

  9. Narrow gap mechanised arc welding in nuclear components manufactured by AREVA NP; Le soudage mecanise a l'arc en chanfrein etroit dans les constructions nucleaires realisees par AREVA NP

    Energy Technology Data Exchange (ETDEWEB)

    Peigney, A. [Departement Soudage AREVA Centre Technique - 71380 Saint-Marcel (France)

    2007-07-01

    Nuclear components require welds of irreproachable and reproducible quality. Moreover, for a given welding process, productivity requirements lead to reduce the volume of deposited metal and thus to use narrow gap design. In the shop, narrow gap Submerged Arc Welding process (SAW) is currently used on rotating parts in flat position for thicknesses up to 300 mm. Welding is performed with one or two wires in two passes per layer. In Gas Tungsten Arc Welding process (GTAW), multiple applications can be found because this process presents the advantage of allowing welding in all positions. Welding is performed in one or two passes per layer. The process is used in factory and on the nuclear sites for assembling new components but also for replacing components and for repairs. Presently, an increase of productivity of the process is sought through the use of hot wire and/or two wires. Concerning Gas Metal Arc Welding process (GMAW), its use is growing for nuclear components, including narrow gap applications. This process, limited in its applications in the past on account of the defects it generated, draws benefit from the progress of the welding generators. Then it is possible to use this efficient process for high security components such as those of nuclear systems. It is to be noted that the process is applicable in the various welding positions as it is the case for GTAW, while being more efficient than the latter. This paper presents the state of the art in the use of narrow gap mechanised arc welding processes by AREVA NP units. (author) [French] Les constructions nucleaires necessitent des soudures de qualite irreprochable et reproductible. Par ailleurs les imperatifs de productivite conduisent, pour un procede donne, a reduire le volume de metal a deposer et donc a utiliser des chanfreins etroits. En atelier, le soudage fil-flux en chanfrein etroit est couramment utilise sur des pieces tournantes en position a plat pour des epaisseurs atteignant 300 mm. On

  10. Research on NC motion controller based on SOPC technology

    Science.gov (United States)

    Jiang, Tingbiao; Meng, Biao

    2006-11-01

    With the rapid development of the digitization and informationization, the application of numerical control technology in the manufacturing industry becomes more and more important. However, the conventional numerical control system usually has some shortcomings such as the poor in system openness, character of real-time, cutability and reconfiguration. In order to solve these problems, this paper investigates the development prospect and advantage of the application in numerical control area with system-on-a-Programmable-Chip (SOPC) technology, and puts forward to a research program approach to the NC controller based on SOPC technology. Utilizing the characteristic of SOPC technology, we integrate high density logic device FPGA, memory SRAM, and embedded processor ARM into a single programmable logic device. We also combine the 32-bit RISC processor with high computing capability of the complicated algorithm with the FPGA device with strong motivable reconfiguration logic control ability. With these steps, we can greatly resolve the defect described in above existing numerical control systems. For the concrete implementation method, we use FPGA chip embedded with ARM hard nuclear processor to construct the control core of the motion controller. We also design the peripheral circuit of the controller according to the requirements of actual control functions, transplant real-time operating system into ARM, design the driver of the peripheral assisted chip, develop the application program to control and configuration of FPGA, design IP core of logic algorithm for various NC motion control to configured it into FPGA. The whole control system uses the concept of modular and structured design to develop hardware and software system. Thus the NC motion controller with the advantage of easily tailoring, highly opening, reconfigurable, and expandable can be implemented.

  11. Benchmarking of AREVA BWR FDIC-PEZOG model against first BFE3 cycle 15 application of On-Line NobleChem results

    International Nuclear Information System (INIS)

    The combination of AREVA's BWR FDIC-PEZOG tools allows the calculation of the total liftoff as a measure of fuel performance and a risk indicator for fuel reliability. The AREVA BWR FDIC tool is a crud modeling tool. The PEZOG tool models the platinum-enhanced zirconium oxide growth of fuel cladding when exposed to platinum during operation. Continuous effort to improve these tools used for the total liftoff calculations is illustrated by the benchmarking of the tools after the application of On-Line NobleChemTM at TVA Browns Ferry Unit 3 during Cycle 15. A set of runs using the modified FDIC-PEZOG model and actual plant water chemistry for Cycle 15 and partial data for Cycle 16 were performed. The updated results' deposit thickness and deposit composition predictions for EOC15 were compared to the measured data from EOC15 and are presented in this paper. The updated predicted deposit thickness matched the actual, measured value exactly. Predicted deposit composition near the fuel rod boundary, nearer to the bulk reactor water, and as an averaged deposit, as presented in the paper, compared extremely well with the measured data at EOC15. The updated AREVA methodology resulted in lower fuel oxide thickness predictions over the life of the fuel as compared to the initial evaluations for BFE3 by incorporating more recent experimental data on the thermal conductivity of zirconia; unnecessary conservatism in the prediction of the fuel oxide thickness over the life of the fuel was removed in the improved model. (authors)

  12. Universell kopplingsbox mellan NC-maskin och industrirobot

    OpenAIRE

    Martín, Jose Antonio; Trujillo, Eduardo

    2010-01-01

    The aim of this thesis is the design and implementation of a standardized interface to communicate a NC machine with an industrial robot. This interface consists of an ‘electronic box’ which includes a powerful board that is perfect for automation projects composed of a microcontroller, serial ports, optocouplers, relays, etc… The main component of this PCB is the microcontroller. The Atmel AT90CAN128 microcontroller is a good choice for this purpose since it is perfectly suited for industria...

  13. CNC LATHE MACHINE PRODUCING NC CODE BY USING DIALOG METHOD

    Directory of Open Access Journals (Sweden)

    Yakup TURGUT

    2004-03-01

    Full Text Available In this study, an NC code generation program utilising Dialog Method was developed for turning centres. Initially, CNC lathes turning methods and tool path development techniques were reviewed briefly. By using geometric definition methods, tool path was generated and CNC part program was developed for FANUC control unit. The developed program made CNC part program generation process easy. The program was developed using BASIC 6.0 programming language while the material and cutting tool database were and supported with the help of ACCESS 7.0.

  14. Application of COBRA-NC to hydrogen transport

    International Nuclear Information System (INIS)

    COBRA-NC, a thermal-hydraulic computer code for the analysis of light water reactor (LWR) containment system transients is presented. A brief description of the code is provided. While the code is being developed for all phases of a containment transient, data comparisons with hydrogen distribution test data obtained in the Hanford Engineering Development Laboratory test facility and in the Battelle Memorial Institute's test facility are presented in this paper. The advantages this code features over other containment codes is also discussed

  15. ISO 14649 (STEP-NC: New Standards for CNC Machining

    Directory of Open Access Journals (Sweden)

    Yusri Yusof

    2010-06-01

    Full Text Available The changing economic climate has made global manufacturing a growing reality over the last decade, forcing companies from east and west and all over the world to collaborate beyond geographic boundaries in the design, manufacture and assemble of products. The ISO10303 and ISO14649 Standards (STEP and STEP-NC have been developed to introduce interoperability into manufacturing enterprises so as to meet the challenge of responding to production on demand. The paper focuses on the use of this new standard to address the process planning and machining of turn/mill discrete components. Due to the complexity of programming these machines there is a need to model their process capability to improve the interoperable manufacturing capability in places such as turning centres. Finally a proposed computational environment for a STEP-NC compliant system for turning operations (SCSTO is described. And supported by the specification of information models and constructed using a structured methodology and object-oriented methods. SCSTO was developed to generate a Part 21 file based on machining features to support the interactive generation of process plans utilizing feature extraction. A case study component has been developed to prove the concept for using the milling and turning parts of ISO14649 to provide a turn-mill CAD/CAPP/CAM environment.

  16. Study of an NC system of machining crown gears

    Science.gov (United States)

    Xu, Xiaogang; Wang, Huaqing; Yan, Jian; Gao, Shenyou

    2005-12-01

    Crown gear couplings are usually used in metallurgy and steel rolling equipments, which is manufactured by duplicating processing in common. The method makes the manipulator work hard, and the efficiency is low. The machining precision is limited to the shape of the mold and it is difficult to control the movement of machines table. This work stated an NC system to use hobbing machine. It consists of an industrial control computer, grating sensor, servo- motor and its driver source, servo driver card and other I/O equipments of inputting and outputting. The grating sensor was installed in the axial direction to trace the instantaneous position of gob rest. The radial movement of the machine table was controlled by a servomotor. When the computer captures the axial signal, this system controls the machine table by moving ahead or backwards according to the calculated value of interpolation theory. Thus, two dimensions (axial and radial) associated movement was realized while the crown gear was processed. The feature of the system is that a grating sensor used in the axial direction replaces the servomotor. By making a little change in the mechanism of the machine, NC can be implement and its redesign cost is very low. The design software has an interpolation function for a circular arc and line. The system has been used on a Y1380 gear hobbing machine, and the correlative software of machining crown gear has been designed as well. Satisfactory results have been obtained, showing facility and reliability in practical operation.

  17. Can the nucleon axial charge be O(Nc^0)?

    CERN Document Server

    Kojo, Toru

    2012-01-01

    The nucleon self-energy and its relation to the nucleon axial charge gA are discussed at large Nc. The energy is compared for the hedgehog, conventional, and recently proposed dichotomous nucleon wavefunctions which give different values for gA. We consider their energies at both perturbative and non-perturbative levels. In perturbative estimates, we take into account the pion exchanges among quarks up to the third orders of axial charge vertices, including the many-body forces such as the Wess-Zumino terms. It turns out that the perturbative pion exchanges among valence quarks give the same leading Nc contributions for three wavefunctions, while their mass differences are O(Lamba_qcd). The signs of splittings flip for different orders of the axial charge vertices, so it is hard to conclude which one is the most energetically favored. For non-perturbative estimates involving the modification of quark bases, we use the chiral quark soliton model as an illustration. With the hedgehog quark wavefunctions with gA...

  18. Construction of the Active Site of Metalloenzyme on Au NC Micelles

    Institute of Scientific and Technical Information of China (English)

    ZHANG, Zhiming; FU, Qiuan; HUANG, Xin; XU, Jiayun; LIU, Junqiu; SHEN, Jiacong

    2009-01-01

    For developing an efficient nanoenzyme system with self-assembly strategy, gold nanocrystal micelles (Au NC micelles) with inserted catalytic Zn(Ⅱ) centers were constructed by self-assembly of a catalytic ligand [N,N-bis(2-aminoethyl)-N'dodecylethylenediamine] Zn(Ⅱ) complexes (Zn(Ⅱ)L) on the surface of Au NC via hy- drophobic interaction. The functionalized Au NC micelles acted as an excellent nanoenzyme model for imitating ribonuclease. The catalytic capability of the Au NC micelles was evaluated by accelerating the cleavage of 2-hydroxypropyl p-nitrophenyl phosphate (HPNP). These functionalized Au NC micelles exhibited considerable ri- bonuclease-like activities by a factor of 4.9×104 (kcat/kuncat) for the cleavage of HPNP in comparison to the sponta- neous cleavage of HPNP at 37℃. The catalytic capability of the functionalized Au NC micelles can be considera- bly compared to other models reported previously as nanoenzymes under the comparable conditions.

  19. The Nc dependencies of baryon masses: Analysis with Lattice QCD and Effective Theory

    Energy Technology Data Exchange (ETDEWEB)

    Calle Cordon, Alvaro C. [JLAB; DeGrand, Thomas A. [University of Colorado; Goity, Jose L. [JLAB

    2014-07-01

    Baryon masses at varying values of Nc and light quark masses are studied with Lattice QCD and the results are analyzed in a low energy effective theory based on a combined framework of the 1/Nc and Heavy Baryon Chiral Perturbation Theory expansions. Lattice QCD results for Nc=3, 5 and 7 obtained in quenched calculations, as well as results for unquenched calculations for Nc=3, are used for the analysis. The results are consistent with a previous analysis of Nc=3 LQCD results, and in addition permit the determination of sub-leading in 1/Nc effects in the spin-flavor singlet component of the baryon masses as well as in the hyperfine splittings.

  20. Characterizing ncRNAs in human pathogenic protists using high-throughput sequencing technology

    Directory of Open Access Journals (Sweden)

    Lesley Joan Collins

    2011-12-01

    Full Text Available ncRNAs are key genes in many human diseases including cancer and viral infection, as well as providing critical functions in pathogenic organisms such as fungi, bacteria, viruses and protists. Until now the identification and characterization of ncRNAs associated with disease has been slow or inaccurate requiring many years of testing to understand complicated RNA and protein gene relationships. High-throughput sequencing now offers the opportunity to characterize miRNAs, siRNAs, snoRNAs and long ncRNAs on a genomic scale making it faster and easier to clarify how these ncRNAs contribute to the disease state. However, this technology is still relatively new, and ncRNA discovery is not an application of high priority for streamlined bioinformatics. Here we summarize background concepts and practical approaches for ncRNA analysis using high-throughput sequencing, and how it relates to understanding human disease. As a case study, we focus on the parasitic protists Giardia lamblia and Trichomonas vaginalis, where large evolutionary distance has meant difficulties in comparing ncRNAs with those from model eukaryotes. A combination of biological, computational and sequencing approaches has enabled easier classification of ncRNA classes such as snoRNAs, but has also aided the identification of novel classes. It is hoped that a higher level of understanding of ncRNA expression and interaction may aid in the development of less harsh treatment for protist-based diseases.

  1. NC flame pipe cutting machine tool based on open architecture CNC system

    Institute of Scientific and Technical Information of China (English)

    Xiaogen NIE; Yanbing LIU

    2009-01-01

    Based on the analysis of the principle and flame movement of a pipe cutting machine tool, a retrofit NC flame pipe cutting machine tool (NFPCM) that can meet the demands of cutting various pipes is proposed. The paper deals with the design and implementation of an open architecture CNC system for the NFPCM, many of whose aspects are similar to milling machines; however, different from their machining processes and control strategies. The paper emphasizes on the NC system structure and the method for directly creating the NC file according to the cutting type and parameters. Further, the paper develops the program and sets up the open and module NC system.

  2. Study of Machining Error Forecast in NC Lathe

    Institute of Scientific and Technical Information of China (English)

    LIU Jiwei; ZHANG Ying; YANG Zheqing

    2006-01-01

    This paper brings forward a kind of machining error forecast principle in NC lathe simulation system. It combines the method of math, dynamic, material and mechanism, etc, sums up the factors which can affect the machining error, coalescent knowledge of mechanism manufacture technique and interconvert characteristic, mapped the change of physics factor in cutting process into virtual manufacture system by mathematical model. On the platform of Windows 2000 and Visual C++, applying program is developed by use of C++. The lean warehouse of MATLAB is transferred in order to command MATLAB on the language platform of MATLAB, and then the curve of the results is drawn by the outcome of calculation, which is based on the mathematical model in order to manifest the simulation results in the pattern of data and curve.

  3. NC-3智能快速充电器

    Institute of Scientific and Technical Information of China (English)

    于左

    2001-01-01

    @@ 使用数字照相机的人特别关心其电池充电设备的好坏.由于现在的可充电池的容量成倍增长,用老式的固定电流式充电器往往需要很长时间才能将电池充满;一般的快速充电器又容易将小容量的可充电池过量充电.笔者向大家介绍"三洋"公司出品的NC-3智能快速充电器.

  4. METHODS OF OBTAINING HIGH QUALITY OF METALWORKING NC MACHINES

    OpenAIRE

    Ota, Yoshimi

    2009-01-01

    Приведены сведения об опыте работы японской компании Mori Seiki в области создания перспективного металлообрабатывающего оборудования с ЧПУInformation about operational experience of Japanese company Mori Seiki in the field of making perspective metal-working NC machines is presented

  5. ncDNA and drift drive binding site accumulation

    Directory of Open Access Journals (Sweden)

    Ruths Troy

    2012-08-01

    Full Text Available Abstract Background The amount of transcription factor binding sites (TFBS in an organism’s genome positively correlates with the complexity of the regulatory network of the organism. However, the manner by which TFBS arise and accumulate in genomes and the effects of regulatory network complexity on the organism’s fitness are far from being known. The availability of TFBS data from many organisms provides an opportunity to explore these issues, particularly from an evolutionary perspective. Results We analyzed TFBS data from five model organisms – E. coli K12, S. cerevisiae, C. elegans, D. melanogaster, A. thaliana – and found a positive correlation between the amount of non-coding DNA (ncDNA in the organism’s genome and regulatory complexity. Based on this finding, we hypothesize that the amount of ncDNA, combined with the population size, can explain the patterns of regulatory complexity across organisms. To test this hypothesis, we devised a genome-based regulatory pathway model and subjected it to the forces of evolution through population genetic simulations. The results support our hypothesis, showing neutral evolutionary forces alone can explain TFBS patterns, and that selection on the regulatory network function does not alter this finding. Conclusions The cis-regulome is not a clean functional network crafted by adaptive forces alone, but instead a data source filled with the noise of non-adaptive forces. From a regulatory perspective, this evolutionary noise manifests as complexity on both the binding site and pathway level, which has significant implications on many directions in microbiology, genetics, and synthetic biology.

  6. Study on Intelligent NC Programming for Complex Components of Marine Diesel Based on KBE and UG NX

    Institute of Scientific and Technical Information of China (English)

    ZHANG Liang; ZHANG Shengwen; FANG Xifeng

    2006-01-01

    The NC programming for complex components has lots drawbacks such as excessive repetitious labors, heavy workload and lack of optimization, which are especially serious in NC programming for complex components of marine diesel. Based on the key technologies of applying KBE(Knowledge Based Engineering)to NC programming--knowledge representation, generalized knowledge base, knowledge acquisition and knowledge reasoning, the system of intelligent NC programming for complex components of marine diesel has been built by means of the knowledge template and the UG/Open. The experiment results indicate that the NC program generated with high efficiency of NC programming by the system is accurate enough to meet the need of NC machining. Consequently, the automatization and intelligentization of NC programming has been presented, and the study is proved to be a successful attempt in the area of applying KBE to NC programming.

  7. Study on Interaction of ADN and (NC+NG) by Gasometric Method%量气法研究ADN与(NC+NG)的相互作用

    Institute of Scientific and Technical Information of China (English)

    何少蓉; 张林军; 衡淑云; 刘子如

    2008-01-01

    用 NBK型"拉瓦"量气测试系统研究了较高温度下二硝酰胺铵(ADN)与双基吸收药(NC+NG)体系的相互作用,从动力学角度阐述了二者的相互作用.结果表明: ADN与(NC+NG)混合物加热分解的最终放气量在标准状态下为626.8 mL·g-1,与ADN和(NC+NG)最大放气量之和相比并没有增加,但分解速度显著提高,活化能显著降低至82.58 kJ·mol-1,ADN与(NC+NG)之间存在强烈的相互作用.

  8. NC++: a NOW-Based Object-Oriented Distributed Programming Language%基于NOW的对象式分布式程序设计语言NC++

    Institute of Scientific and Technical Information of China (English)

    顾庆; 谢立; 陈道蓄; 吴迎红; 孙钟秀

    2001-01-01

    An object-oriented distributed programming language NC++ which is based on NOW (network of workstations) environment is introduced in this paper. It is an extension of DC++. NC++ gives a rather complete programming environment, including NC++ pre-compiler, visual-programming interface, multicast communicating facility and a test system. It improves the process group management and inter-process communication facilities, and puts forth a DSM (distributed shared memory) subsystem based on belief network, which is used to manipulate C++ global variables. In practice, NC++ offers simplicity for distributed program design without sacrificing the performance.%提出了一个基于工作站网(network of workstations,简称NOW)的分布式程序设计语言NC++(NOW C++).它是DC++语言的扩充.NC++提供了一个完备的编程环境,包括NC++预编译器、图视编程界面、多目通信机制和测试系统.它完善了组管理机制和进程通信机制,提出了一个基于信度推理网络的分布共享内存(distributed shared memory,简称DSM)机制以管理C++公共变量.实践证明,NC++语言在确保编程方便性的前提下保证了分布式程序的性能.

  9. 33 CFR 110.170 - Lockwoods Folly Inlet, N.C.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Lockwoods Folly Inlet, N.C. 110.170 Section 110.170 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.170 Lockwoods Folly Inlet, N.C. (a)...

  10. Concept of automatic programming of NC machine for metal plate cutting by genetic algorithm method

    Directory of Open Access Journals (Sweden)

    B. Vaupotic

    2005-12-01

    Full Text Available Purpose: In this paper the concept of automatic programs of the NC machine for metal plate cutting by genetic algorithm method has been presented.Design/methodology/approach: The paper was limited to automatic creation of NC programs for two-dimensional cutting of material by means of adaptive heuristic search algorithms.Findings: Automatic creation of NC programs in laser cutting of materials combines the CAD concepts, the recognition of features and creation and optimization of NC programs. The proposed intelligent system is capable to recognize automatically the nesting of products in the layout, to determine the incisions and sequences of cuts forming the laid out products. Position of incisions is determined at the relevant places on the cut. The system is capable to find the shortest path between individual cuts and to record the NC program.Research limitations/implications: It would be appropriate to orient future researches towards conceiving an improved system for three-dimensional cutting with optional determination of positions of incisions, with the capability to sense collisions and with optimization of the speed and acceleration during cutting.Practical implications: The proposed system assures automatic preparation of NC program without NC programer.Originality/value: The proposed concept shows a high degree of universality, efficiency and reliability and it can be simply adapted to other NC-machines.

  11. Nucleic Acid Chaperone Activity of HIV-1 NC Proteins Investigated by Single Molecule DNA Stretching

    Science.gov (United States)

    Williams, Mark C.; Gorelick, Robert J.; Musier-Forsyth, Karin; Bloomfield, Victor A.

    2002-03-01

    HIV-1 Nucleocapsid Protein (NC) is a nucleic acid chaperone protein that is responsible for facilitating numerous nucleic acid rearrangements throughout the reverse transcription cycle of HIV-1. To understand the mechanism of NC’s chaperone function, we carried out single molecule DNA stretching studies in the presence of NC and mutant forms of NC. Using an optical tweezers instrument, we stretch single DNA molecules from the double-stranded helical state to the single-stranded (coil) state. Based on the observed cooperativity of DNA force-induced melting, we find that the fraction of melted base pairs at room temperature is increased dramatically in the presence of NC. Thus, upon NC binding, increased thermal fluctuations cause continuous melting and reannealing of base pairs so that DNA strands are able to rapidly sample configurations in order to find the lowest energy state. While NC destabilizes the double-stranded form of DNA, a mutant form of NC that lacks the zinc finger structures does not. DNA stretching experiments carried out in the presence of NC variants containing more subtle changes in the zinc finger structures were conducted to elucidate the contribution of each individual finger to NC’s chaperone activity, and these results will be reported.

  12. 33 CFR 165.T05-0091 - Safety Zone; Alligator River, NC.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Safety Zone; Alligator River, NC... Safety Zone; Alligator River, NC. (a) Definitions. For the purposes of this section, Captain of the Port... on the waters of the Alligator River centered at (35°54′3″ N/076°00′25″ W) a position directly...

  13. Anion-Dependent Aggregate Formation and Charge Behavior of Colloidal Fullerenes (n-C60)

    Science.gov (United States)

    The fate and transport of colloidal fullerenes (n-C60) in the environment is likely to be guided by electrokinetic and aggregation behavior. In natural water bodies inorganic ions exert significant effects in determining the size and charge of n-C60 nanoparticles. Although the ef...

  14. Process design for NC machining%数控加工的工艺设计

    Institute of Scientific and Technical Information of China (English)

    杨毅

    2001-01-01

    The steps of process design, details and main points of NC machining are introduced. The method of NC machining process design is presented.%重点介绍了数控加工工艺设计的步骤、内容和要点,提供了数控加工工艺设计的方法。

  15. Renormalization of the baryon axial vector current in large-Nc chiral perturbation theory

    International Nuclear Information System (INIS)

    The baryon axial vector current is considered within the combined framework of large-Nc baryon chiral perturbation theory (where Nc is the number of colors) and the baryon axial vector couplings are extracted. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis

  16. Baryon wave function in large-Nc QCD: universality, nonlinear evolution equation and asymptotic limit

    CERN Document Server

    Pobylitsa, P V

    2004-01-01

    The 1/Nc expansion is formulated for the baryon wave function in terms of a specially constructed generating functional. The leading order of this 1/Nc expansion is universal for all low lying baryons [including the O(1/Nc)and O(1)excited resonances] and for baryon-meson scattering states. A nonlinear evolution equation of Hamilton-Jacobi type is derived for the generating functional describing the baryon distribution amplitude in the large-Nc limit. In the asymptotic regime this nonlinear equation is solved analytically. The anomalous dimensions of the leading twist baryon operators diagonalizing the evolution are computed analytically up to the next-to-leading order of the 1/Nc expansion.

  17. AREVA - 2012 Reference document

    International Nuclear Information System (INIS)

    After a presentation of the person responsible for this Reference Document, of statutory auditors, and of a summary of financial information, this report address the different risk factors: risk management and coverage, legal risk, industrial and environmental risk, operational risk, risk related to major projects, liquidity and market risk, and other risks (related to political and economic conditions, to Group's structure, and to human resources). The next parts propose information about the issuer, a business overview (markets for nuclear power and renewable energies, customers and suppliers, group's strategy, operations), a brief presentation of the organizational structure, a presentation of properties, plants and equipment (principal sites, environmental issues which may affect these items), analysis and comments on the group's financial position and performance, a presentation of capital resources, a presentation of research and development activities (programs, patents and licenses), a brief description of financial objectives and profit forecasts or estimates, a presentation of administration, management and supervision bodies, a description of the operation of corporate bodies, an overview of personnel, of principal shareholders, and of transactions with related parties, a more detailed presentation of financial information concerning assets, financial positions and financial performance. Addition information regarding share capital is given, as well as an indication of major contracts, third party information, available documents, and information on holdings

  18. Optimalizace NC programu pomocí CAD/CAM software

    OpenAIRE

    Paseka, Jan

    2014-01-01

    Cílem této diplomové práce je návrh úsporných opatření v procesu technologické přípravy výroby průmyslového podniku. V první části je zpracován obecný teoretický rozbor součástkové základny a stávajících NC programů. Na základě těchto poznatků a provedené analýzy byly stanoveny návrhy optimalizace popsané ve druhé části. Díky těmto návrhům dochází při jejich plné implementaci k úspoře časových nároků a finančních prostředků potřebných pro zavedení prototypového výrobku do sériové produkce....

  19. A hybrid approach to automatic generation of NC programs

    Directory of Open Access Journals (Sweden)

    G. Payeganeh

    2005-12-01

    Full Text Available Purpose: This paper describes AGNCP, an intelligent system for integrating commercial CAD and CAM systems for 2.5D milling operations at a low cost.Design/methodology/approach: It deals with different machining problems with the aid of two expert systems. It recognizes machining features, determines required machining process plans, cutting tools and parameters necessary for generation of NC programs.Findings: The system deals with different machining problems with the aid of two expert systems. The first communicates with CAD system for recognizing machining features. It is developed in LISP as machining features can be properly represented by LISP codes is ideal for manipulating lists and input data. The second expert system requires extensive communications with several databases for retrieving tooling and machining information and VP-Expert shell was found to be the most suitable package to perform this task.Research limitations/implications: 2.5D milling covers a wide range of operations. However, work is in progress cover 3D milling operations. The system can also be modified to be used for other activities such as turning, flame cutting, electro discharge machining (EDM, punching, etc.Practical implications: Use of AGNCP resulted in improved efficiency, noticeable time savings, and elimination of the need for expert process planners.Originality/value: The paper describes a method for eliminating the need for extensive user intervention for CAD/CAM integration.

  20. Process-scheme-driven automatic construction of NC machining cell for aircraft structural parts

    Institute of Scientific and Technical Information of China (English)

    Chen Shulin; Zheng Guolei; Zhou Min; Du Baorui; Chu Hongzhen

    2013-01-01

    In order to enhance the NC programming efficiency and quality of aircraft structural parts (ASPs), an intelligent NC programming pattern driven by process schemes is presented. In this pattern, the NC machining cell is the minimal organizational structure in the technological process, consisting of an operation machining volume cell, and the type and parameters of the machining operation. After the machining cell construction, the final NC program can be easily obtained in a CAD/CAM system by instantiating the machining operation for each machining cell. Accord-ingly, how to automatically establish the machining cells is a key issue in intelligent NC program-ming. On the basis of the NC machining craft of ASP, the paper aims to make an in-depth research on this issue. Firstly, some new terms about the residual volume and the machinable volume are defined, and then, the technological process is modeled with a process scheme. Secondly, the approach to building the machining cells is introduced, in which real-time complement machining is mainly considered to avoid interference and overcutting. Thirdly, the implementing algorithm is designed and applied to the Intelligent NC Programming System of ASP. Finally, the developed algorithm is validated through two case studies.

  1. The origin of blue photoluminescence from nc-Si/SiO2 multilayers

    Institute of Scientific and Technical Information of China (English)

    Ma Zhong-Yuan; Xu Ling; Huang Xin-Fan; Chen Kun-Ji; Feng Duan; Guo Si-Hua; Chen De-Yuan; Wei De-Yuan; Yao Yao; Zhou Jiang; Huang Rui; Li Wei; Xu Jun

    2008-01-01

    Intensive blue photoluminescence (PL) was observed at room temperature from the nanocrystalline-Si/SiO2 (ncSi/SiO2) multilayers (MLs) obtained by thermal annealing of SiO/SiO2 MLs for the first time.By controlling the size of nc-Si formed in SiO sublayer from 3.5 to 1.5 nm,the PL peak blueshifts from 457 to 411 nm.Combining the analysis of TEM,Raman and absorption measurement,this paper attributes the blue PL to multiple luminescent centres at the interface of nc-Si and SiO2.

  2. Directly Generating the NC Machining Program from AutoCAD Graph

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    One kind of auto-programming method directly gener at ing the NC machining program by AutoCAD graph is discussed in this article. Firs tly, the article discusses the open type graphic interface of AutoCAD. Then the graphic export among the AutoCAD, the adding of process information and the data storage, as well as technology of generating NC program has been introduced . Finally, a NC auto-programming system GAPS based on AutoCAD graph is develope d. The tendency of auto-programming is graphic auto-pro...

  3. Sources of suspended sediment in the Lower Roanoke River, NC

    Science.gov (United States)

    Jalowska, A. M.; McKee, B. A.; Rodriguez, A. B.; Laceby, J. P.

    2015-12-01

    The Lower Roanoke River, NC, extends 220 km from the fall line to the bayhead delta front in the Albemarle Sound. The Lower Roanoke is almost completely disconnected from the upper reaches by a series of dams, with the furthest downstream dam located at the fall line. The dams effectively restrict the suspended sediment delivery from headwaters, making soils and sediments from the Lower Roanoke River basin, the sole source of suspended sediment. In flow-regulated rivers, bank erosion, especially mass wasting, is the major contributor to the suspended matter. Additional sources of the suspended sediment considered in this study are river channel, surface soils, floodplain surface sediments, and erosion of the delta front and prodelta. Here, we examine spatial and temporal variations in those sources. This study combined the use of flow and grain size data with a sediment fingerprinting method, to examine the contribution of surface and subsurface sediments to the observed suspended sediment load along the Lower Roanoke River. The fingerprinting method utilized radionuclide tracers 210Pb (natural atmospheric fallout), and 137Cs (produced by thermonuclear bomb testing). The contributions of surface and subsurface sources to the suspended sediment were calculated with 95% confidence intervals using a Monte-Carlo numerical mixing model. Our results show that with decreasing river slope and changing hydrography along the river, the contribution of surface sediments increases and becomes a main source of sediments in the Roanoke bayhead delta. At the river mouth, the surface sediment contribution decreases and is replaced by sediments eroded from the delta front and prodelta. The area of high surface sediment contribution is within the middle and upper parts of the delta, which are considered net depositional. Our study demonstrates that floodplains, often regarded to be a sediment sink, are also a sediment source, and they should be factored into sediment, carbon and

  4. Preparation and characterization of polymer blends of NC and GAP-TPE%NC/GAP-TPE共混聚合物的制备和性能研究

    Institute of Scientific and Technical Information of China (English)

    左海丽; 肖乐勤; 菅晓霞; 周伟良

    2011-01-01

    A series of blends of energetic thermoplastic polyurethane( GAP-TPE)and Nitrocellulose( NC) were prepared by the way of chain extension,blend and aging. The structures of the blends were analyzed by means of FT1R spectroscopy, wide-angle Xray diffraction,and scanning electron microscopy. The compatibility and properties of the blends were characterized by dynamic mechanical analysis( DMA)and tensile testing. It suggests that nitrocellulose molecules penetrate into the polyurethane and interrupt the intra-hydrogen bonding between the hard and soft segments. The results indicate that the blended sheets exhibited good miscibility. The tensile strength increased with an increase of NC content. The blends NC/GAP-TPE having 5%~20% NC exhibited a significant increase from 10.4 Mpa to 20.4 Mpa for tensile strength ,49% increased.%采用扩链后共混再熟化的方法,制备了1组不同组成的硝化棉(NC)/含能热塑性弹性体(GAP-TPE)共混聚合物.采用红外光谱(FTIR)和X射线衍射(XRD)表征NC/GAP-TPE共混物的结构,扫描电镜(SEM)观察共混物的断面,动态热机械分析(DMA)测定共混物的玻璃化转变,运用拉伸实验研究不同配比NC/GAP-TPE共混物的力学性能.结果表明,NC和GAP-TPE分子间存在氢键相互作用.NC均匀分散在GAP-TPE基体中,不同配比的NC/GAP-TPE共混物均存在1个玻璃化温度,二者之间具有较好的相容性.当NC含量从5%到20%变化时,共混试样的拉伸强度从10.4 MPa增加至20.4 MPa,提高了49%.

  5. The NC16A Domain of Collagen XVII Plays a Role in Triple Helix Assembly and Stability*

    OpenAIRE

    Van den Bergh, Françoise; Fu, Chang-Ling; Olague-Marchan, Monica; Giudice, George J.

    2006-01-01

    Collagen XVII/BP180 is a transmembrane constituent of the epidermal anchoring complex. To study the role of its non-collagenous linker domain, NC16A, in protein assembly and stability, we analyzed the following recombinant proteins: the collagen XVII extracellular domain with or without NC16A, and a pair of truncated proteins comprising the COL15-NC15 stretch expressed with or without NC16A. All four proteins were found to exist as stable collagen triple helices; however, the two missing NC16...

  6. Evolution of twist-three parton distributions in QCD beyond the large $N_{c}$ limit

    CERN Document Server

    Braun, V M; Manashov, A N

    2000-01-01

    We formulate a consistent 1/N_c^2 expansion of the QCD evolution equations for the twist-three quark distributions g_2(x,Q^2), h_L(x,Q^2) and e(x,Q^2) based on the interpretation of the evolution as a three-particle quantum-mechanical problem with hermitian Hamiltonian. Each distribution amplitude can be decomposed in contributions of partonic components with DGLAP-type scale dependence. We calculate the 1/N_c^2 corrections to the evolution of the dominant component with the lowest anomalous dimension - the only one that survives in the large-N_c limit - and observe a good agreement with the exact numerical results for N_c=3. The 1/N_c^2 admixture of operators with higher anomalous dimensions is shown to be concentrated at a few lowest partonic components and in general is rather weak.

  7. Fabrication and characteristics of the nc-Si/c-Si heterojunction MAGFET

    Institute of Scientific and Technical Information of China (English)

    Zhao Xiaofeng; Wen Dianzhong

    2009-01-01

    A MAGFET using an nc-Si/c-Si heterojunction as source and drain was fabricated by CMOS technology, using two ohm-contact electrodes as Hall outputs on double sides of the channel situated 0.7L from the source. The experimental results show that when V_(DS) = -7.0 V, the magnetic sensitivity of the single nc-Si/c-Si heterojunction magnetic metal oxide semiconductor field effect transistor (MAGFET) with an L : W ratio of 2 : 1 is 21.26 mV/T,and that with an L : W ratio of 4 : 1 is 13.88 mV/T. When the outputs of double nc-Si/c-Si heterojunction MAGFETs with an L : W ratio of 4 : 1 are in series, their magnetic sensitivity is 22.74 mV/T, which is an improvement of about 64% compared with that of a single nc-Si/c-Si heterojunction MAGFET.

  8. EnviroAtlas -Durham, NC- One Meter Resolution Urban Area Land Cover Map (2010) Web Service

    Data.gov (United States)

    U.S. Environmental Protection Agency — This EnviroAtlas web service supports research and online mapping activities related to EnviroAtlas (https://www.epa.gov/enviroatlas ). The EnviroAtlas Durham, NC...

  9. EnviroAtlas -Durham, NC- One Meter Resolution Urban Area Land Cover Map (2010)

    Data.gov (United States)

    U.S. Environmental Protection Agency — The EnviroAtlas Durham, NC land cover map was generated from USDA NAIP (National Agricultural Imagery Program) four band (red, green, blue and near infrared) aerial...

  10. Investigation on the foaming behaviors of NC-based gun propellants

    Directory of Open Access Journals (Sweden)

    Yu-xiang Li

    2014-09-01

    Full Text Available To prepare the porous NC-based (nitrocellulose-based gun propellants, the batch foaming process of using supercritical CO2 as the physical blowing agent is used. The solubilities of CO2 in the single-base propellants and TEGDN (trimethyleneglycol dinitrate propellants are measured by the gravimetric method, and SEM (scanning electron microscope is used to observe the morphology of foamed propellants. The result shows that a large amount of CO2 could be dissolved in NC-based propellants. The experimental results also reveal that the energetic plasticizer TEGDN exerts an important influence on the pore structure. The triaxial tensile failure mechanism for solid-state nucleation is used to explain the nucleation of NC-based propellants in the solid state. Since some specific foaming behaviors of NC-based propellants can not be explained by the failure mechanism, a solid-state nucleation mechanism which revises the triaxial tensile failure mechanism is proposed and discussed.

  11. De Novo Discovery of Structured ncRNA Motifs in Genomic Sequences

    DEFF Research Database (Denmark)

    Ruzzo, Walter L; Gorodkin, Jan

    2014-01-01

    De novo discovery of "motifs" capturing the commonalities among related noncoding ncRNA structured RNAs is among the most difficult problems in computational biology. This chapter outlines the challenges presented by this problem, together with some approaches towards solving them, with an emphas...... on an approach based on the CMfinder CMfinder program as a case study. Applications to genomic screens for novel de novo structured ncRNA ncRNA s, including structured RNA elements in untranslated portions of protein-coding genes, are presented.......De novo discovery of "motifs" capturing the commonalities among related noncoding ncRNA structured RNAs is among the most difficult problems in computational biology. This chapter outlines the challenges presented by this problem, together with some approaches towards solving them, with an emphasis...

  12. Complete Genome Sequence of NC983, a Live Attenuated Strain of Salmonella enterica Serovar Typhimurium

    Science.gov (United States)

    Troxell, Bryan; Fink, Ryan C.; Dickey, Allison N.; Scholl, Elizabeth H.

    2016-01-01

    Foodborne infections caused by Salmonella enterica serovars are a significant problem worldwide. Presented here is the genome sequence of the nontyphoidal S. enterica serovar Typhimurium mutant strain NC983, a potential vaccine candidate. PMID:27738027

  13. Anion-Dependent Aggregate Formation and Charge Behavior of Colloidal Fullerenes (n-C60)

    Science.gov (United States)

    Mukherjee, B.; Weaver, J. W.

    2009-12-01

    The fate and transport of colloidal fullerenes (n-C60) in the environment are likely to be guided by their electrokinetic and aggregation behavior. In natural water bodies inorganic ions exert significant effects in determining the size and charge of dispersed n-C60. Although the effects of cations on the behavior of n-C60 have been studied extensively; studies on the effect of anions are relatively few and thus were the focus of our investigation. The effects of anions (e.g., Cl- , SO42-) on average aggregate size (DH) and zeta potential (ZP) of n-C60 were found to be absent in presence of monovalent cations (e.g., Na+) over the tested range of pH (3-to-12) and ionic strength (0-to-20 mM). Similar observations were noted in the presence of multivalent cations (e.g., Mg2+) near acidic and neutral pH conditions. However, under alkaline conditions (pH~10) a strong anion-dependent reversal of surface charge was noted. The ZP of n-C60 changed from -65 mV, when dispersed in DI water, to +4 mV and +40 mV in the presence of SO42- and Cl-, respectively in a 10mM salt concentration (i.e., MgCl2 and MgSO4). The corresponding DH of the dispersed n-C60 changed simultaneously from 115 nm, in DI water, to 1450 nm and 225 nm for the MgSO4 and MgCl2 electrolytes. These findings provide a better understanding of interfacial interaction characteristics of n-C60 NPs, and may lead to remediation strategies for n-C60 NPs in the environment.

  14. SIMULATION SYSTEM FOR FIVE-AXIS NC MACHINING USING GENERAL CUTTING TOOL

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A simulation system for five-axis NC machining using general cutting tools is presented. This system differs from other simulation system in that it not only focuses on the geometric simulation but also focuses on the collision detection which is usually not included in NC machining simulation. Besides all of these, estimating cutting forces is also discussed. In order to obtain high efficiency, all algorithms use swept volume modeling technique, so the simulation system is compact and can be performed efficiently.

  15. Removal of aqueous nC60 fullerene from water by low pressure membrane filtration.

    Science.gov (United States)

    Floris, R; Nijmeijer, K; Cornelissen, E R

    2016-03-15

    The potential environmental and health risks of engineered nanoparticles such as buckminsterfullerene C60 in water require their removal during the production of drinking water. We present a study focusing on (i) the removal mechanism and (ii) the elucidation of the role of the membrane pore size during removal of nC60 fullerene nanoparticle suspensions in dead-end microfiltration and ultrafiltration mimicking separation in real industrial water treatment plants. Membranes were selected with pore sizes ranging from 18 nm to 500 nm to determine the significance of the nC60 to membrane pore size ratio and the adsorption affinity between nC60 and membrane material during filtration. Experiments were carried out with a dead-end bench-scale system operated at constant flux conditions including a hydraulic backwash cleaning procedure. nC60 nanoparticles can be efficiently removed by low pressure membrane technology with smaller and, unexpectedly, also by mostly similar or larger pores than the particle size, although the nC60 filtration behaviour appeared to be different. The nC60 size to membrane pore size ratio and the ratio of the cake-layer deposition resistance to the clean membrane resistance, both play an important role on the nC60 filtration behaviour and on the efficiency of the backwash procedure recovering the initial membrane filtration conditions. These results become specifically significant in the context of drinking water production, for which they provide relevant information for an accurate selection between membrane processes and operational parameters for the removal of nC60 in the drinking water treatment.

  16. Silver Blaze Puzzle in 1/Nc Expansions of Cold and Dense QCD Matter

    CERN Document Server

    Armoni, Adi

    2014-01-01

    We consider quantum chromodynamics (QCD) with Nc colors and Nf quark flavors at finite quark chemical potential mu_q or isospin chemical potential mu_I. We specifically address the nature of the ``Silver Blaze'' behavior in the framework of 1/Nc expansion. Starting with the QCD partition function, we implement Veneziano's Nf/Nc expansion to identify the density onset. We find the baryon mass M_B and the pion mass m_pi appearing from different order of Veneziano's expansion. We argue that the confining properties are responsible for the Silver Blaze in the region of m_pi/2 < mu_q < M_B/Nc. We point out, however, that Veneziano's expansion brings about a puzzling subtlety along the same line as the baryon problem in finite-density quenched simulations. We emphasize that the large-Nc limit can allow for the physical ordering of M_B and m_pi thanks to the similarity to the quenched approximation, while the unphysical ghost quarks contaminate the baryon sector if Nc is finite. We also discuss the ``orientifo...

  17. The baryon vector current in the combined chiral and 1/Nc expansions

    CERN Document Server

    Flores-Mendieta, Ruben

    2014-01-01

    The baryon vector current is computed at one-loop order in large-Nc baryon chiral perturbation theory, where Nc is the number of colors. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis and the effects of the decuplet-octet mass difference and SU(3) flavor symmetry breaking are accounted for. There are large-Nc cancellations between different one-loop graphs as a consequence of the large-Nc spin-flavor symmetry of QCD baryons. The results are compared against the available experimental data through several fits in order to extract information about the unknown parameters. The large-Nc baryon chiral perturbation theory predictions are in very good agreement both with the expectations from the 1/Nc expansion and with the experimental data. The effect of SU(3) flavor symmetry breaking for the |Delta S|=1 vector current form factors f1(0) results in a reduction by a few percent with respect to the corresponding SU(3) symmetric values.

  18. The baryon vector current in the combined chiral and 1/Nc expansions

    Energy Technology Data Exchange (ETDEWEB)

    Flores-Mendieta, Ruben; Goity, Jose L [JLAB

    2014-12-01

    The baryon vector current is computed at one-loop order in large-Nc baryon chiral perturbation theory, where Nc is the number of colors. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis and the effects of the decuplet-octet mass difference and SU(3) flavor symmetry breaking are accounted for. There are large-Nc cancellations between different one-loop graphs as a consequence of the large-Nc spin-flavor symmetry of QCD baryons. The results are compared against the available experimental data through several fits in order to extract information about the unknown parameters. The large-Nc baryon chiral perturbation theory predictions are in very good agreement both with the expectations from the 1/Nc expansion and with the experimental data. The effect of SU(3) flavor symmetry breaking for the |Delta S|=1 vector current form factors f1(0) results in a reduction by a few percent with respect to the corresponding SU(3) symmetric values.

  19. A novel denitrifying methanotroph of the NC10 phylum and its microcolony

    Science.gov (United States)

    He, Zhanfei; Cai, Chaoyang; Wang, Jiaqi; Xu, Xinhua; Zheng, Ping; Jetten, Mike S. M.; Hu, Baolan

    2016-09-01

    The NC10 phylum is a candidate phylum of prokaryotes and is considered important in biogeochemical cycles and evolutionary history. NC10 members are as-yet-uncultured and are difficult to enrich, and our knowledge regarding this phylum is largely limited to the first species ‘Candidatus Methylomirabilis oxyfera’ (M. oxyfera). Here, we enriched NC10 members from paddy soil and obtained a novel species of the NC10 phylum that mediates the anaerobic oxidation of methane (AOM) coupled to nitrite reduction. By comparing the new 16S rRNA gene sequences with those already in the database, this new species was found to be widely distributed in various habitats in China. Therefore, we tentatively named it ‘Candidatus Methylomirabilis sinica’ (M. sinica). Cells of M. sinica are roughly coccus-shaped (0.7–1.2 μm), distinct from M. oxyfera (rod-shaped; 0.25–0.5 × 0.8–1.1 μm). Notably, microscopic inspections revealed that M. sinica grew in honeycomb-shaped microcolonies, which was the first discovery of microcolony of the NC10 phylum. This finding opens the possibility to isolate NC10 members using microcolony-dependent isolation strategies.

  20. A novel denitrifying methanotroph of the NC10 phylum and its microcolony.

    Science.gov (United States)

    He, Zhanfei; Cai, Chaoyang; Wang, Jiaqi; Xu, Xinhua; Zheng, Ping; Jetten, Mike S M; Hu, Baolan

    2016-01-01

    The NC10 phylum is a candidate phylum of prokaryotes and is considered important in biogeochemical cycles and evolutionary history. NC10 members are as-yet-uncultured and are difficult to enrich, and our knowledge regarding this phylum is largely limited to the first species 'Candidatus Methylomirabilis oxyfera' (M. oxyfera). Here, we enriched NC10 members from paddy soil and obtained a novel species of the NC10 phylum that mediates the anaerobic oxidation of methane (AOM) coupled to nitrite reduction. By comparing the new 16S rRNA gene sequences with those already in the database, this new species was found to be widely distributed in various habitats in China. Therefore, we tentatively named it 'Candidatus Methylomirabilis sinica' (M. sinica). Cells of M. sinica are roughly coccus-shaped (0.7-1.2 μm), distinct from M. oxyfera (rod-shaped; 0.25-0.5 × 0.8-1.1 μm). Notably, microscopic inspections revealed that M. sinica grew in honeycomb-shaped microcolonies, which was the first discovery of microcolony of the NC10 phylum. This finding opens the possibility to isolate NC10 members using microcolony-dependent isolation strategies. PMID:27582299

  1. Information report issued in application of the article 146 of the regulation by the Commission for Finances, General Economy, and Budgetary Control on the development perspectives of AREVA and the future of the nuclear sector. Nr 2952

    International Nuclear Information System (INIS)

    As AREVA displays an unprecedented loss, and is facing a durable and persistent stagnation of its nuclear activities after the Fukushima accident, and as these losses are the consequences of misguided strategic decisions and disputable mining acquisitions, as well as of a problematic management of the main big industrial projects, this report comes after an intervention of the French President on the future of this company. The objectives are a restoration of Areva's competitiveness, and the elaboration of a new partnership between EDF and AREVA with a new definition of their respective roles in the design, manufacturing and selling of nuclear reactors. Notably based on hearings, and on visits of the Flamanville EPR site and of the La Hague reprocessing plant this reports aims at informing the French parliament on the different faced challenges and opportunities. The authors thus give an overview of the group financial situation and describe the important reorganisation issues. They analyse how the group has been weakened by its economic performance and a development mode with uncertain results. They try to define a possible future within the frame of a reorganised nuclear sector based on a high performance group, a good governance of the nuclear sector, an industrially consistent solution, and a relevant position for the French nuclear sector

  2. Design and Investigation of SST/nc-Si:H/M (M = Ag, Au, Ni and M/nc-Si:H/M Multifunctional Devices

    Directory of Open Access Journals (Sweden)

    A. F. Qasrawi

    2013-01-01

    Full Text Available Hydrogenated nanocrystalline Silicon thin films prepared by the very high frequency chemical vapor deposition technique (VHF-CVD on stainless steel (SST substrates are used to design Schottky point contact barriers for the purpose of solar energy conversion and passive electronic component applications. In this process, the contact performance between SST and M (M = Ag, Au, and Ni and between Ag, Au, and Ni electrodes was characterized by means of current-voltage, capacitance-voltage, and light intensity dependence of short circuit ( current and open circuit voltage ( of the contacts. Particularly, the devices ideality factors, barrier heights were evaluated by the Schottky method and compared to the Cheung's. Best Schottky device performance with lowest ideality factor suitable for electronic applications was observed in the SST/nc-Si:H/Ag structure. This device reflects a of 229 mV with an of 1.6 mA/cm2 under an illumination intensity of ~40 klux. On the other hand, the highest being 9.0 mA/cm2 and the of 53.1 mV were observed for Ni/nc-Si:H/Au structure. As these voltages represent the maximum biasing voltage for some of the designed devices, the SST/nc-Si:H/M and M/nc-Si:H/M can be regarded as multifunctional self-energy that provided electronic devices suitable for active or passive applications.

  3. Polarization memory effect in the photoluminescence of nc-Si-SiOx light-emitting structures

    Science.gov (United States)

    Michailovska, Katerina; Indutnyi, Ivan; Shepeliavyi, Petro; Sopinskyy, Mykola

    2016-06-01

    The polarization memory (PM) effect in the photoluminescence (PL) of the porous nc-Si-SiOx light-emitting structures, containing nanoparticles of silicon (nc-Si) in the oxide matrix and passivated in a solution of hydrofluoric acid (HF), has been investigated. The studied nc-Si-SiOx structures were produced by evaporation of Si monoxide (SiO) powder in vacuum and oblique deposition on Si wafer, and then the deposited silicon oxide (SiOx) films were annealed in the vacuum at 975 °C to grow nc-Si. It was found that the PM effect in the PL is observed only after passivation of nanostructures: during etching in HF solution, the initial symmetric nc-Si becomes asymmetric elongated. It was also found that in investigated nanostructures, there is a defined orientational dependence of the PL polarization degree ( ρ) in the sample plane which correlates with the orientation of SiOx nanocolumns, forming the structure of the porous layer. The increase of the ρ values in the long-wavelength spectral range with time of HF treatment can be associated with increasing of the anisotropy of large Si nanoparticles. The PM effect for this spectral interval can be described by the dielectric model. In the short-wavelength spectral range, the dependence of the ρ values agrees qualitatively with the quantum confinement effect.

  4. Polarized photoluminescence of nc-Si–SiO{sub x} nanostructures

    Energy Technology Data Exchange (ETDEWEB)

    Michailovska, E. V.; Indutnyi, I. Z.; Shepeliavyi, P. E.; Sopinskii, N. V., E-mail: sopinsky@isp.kiev.ua, E-mail: sopinskyy@ua.fm [National Academy of Sciences of Ukraine, Lashkarev Institute of Semiconductor Physics (Ukraine)

    2016-01-15

    The effect of photoluminescence polarization memory in nc-Si–SiO{sub x} light-emitting structures containing Si nanoparticles (nc-Si) in an oxide matrix is for the first time studied. The polarization properties of continuous and porous nanostructures passivated in HF vapors (or solutions) are studied. It is established that the polarization memory effect is manifested only after treatment of the structures in HF. The effect is also accompanied by a shift of the photoluminescence peak to shorter wavelengths and by a substantial increase in the photoluminescence intensity. It is found that, in anisotropic nc-Si–SiO{sub x} samples produced by oblique deposition in vacuum, the degree of linear photoluminescence polarization in the sample plane exhibits a noticeable orientation dependence and correlates with the orientation of SiO{sub x} nanocolumns forming the structure of the porous layer. These effects are attributed to the transformation of symmetrically shaped Si nanoparticles into asymmetric elongated nc-Si particles upon etching in HF. In continuous layers, nc-Si particles are oriented randomly, whereas in porous structures, their preferential orientation coincides with the orientation of oxide nanocolumns.

  5. nC60 deposition kinetics: the complex contribution of humic acid, ion concentration, and valence.

    Science.gov (United States)

    McNew, Coy P; LeBoeuf, Eugene J

    2016-07-01

    The demonstrated toxicity coupled with inevitable environmental release of nC60 raise serious concerns about its environmental fate and transport, therefore it is crucial to understand how nC60 will interact with subsurface materials including attached phase soil and sediment organic matter (AP-SOM). This study investigated the attachment of nC60 onto a Harpeth humic acid (HHA) coated silica surface under various solution conditions using a quartz crystal microbalance with dissipation monitoring. The HHA coating greatly enhanced nC60 attachment at low ion concentrations while hindering attachment at high ion concentrations in the presence of both mono and divalent cations. At low ion concentrations, the HHA greatly reduced the surface potential of the silica, enhancing nC60 deposition through reduction in the electrostatic repulsion. At high ion concentrations however, the reduced surface potential became less important due to the near zero energy barrier to deposition and therefore non-DLVO forces dominated, induced by compaction of the HHA layer, and leading to hindered attachment. In this manner, observed contributions from the HHA layer were more complex than previously reported and by monitoring surface charge and calculated DLVO interaction energy alongside attachment experiments, this study advances the mechanistic understanding of the variable attachment contributions from the humic acid layer. PMID:27061365

  6. Polarization memory effect in the photoluminescence of nc-Si-SiOx light-emitting structures.

    Science.gov (United States)

    Michailovska, Katerina; Indutnyi, Ivan; Shepeliavyi, Petro; Sopinskyy, Mykola

    2016-12-01

    The polarization memory (PM) effect in the photoluminescence (PL) of the porous nc-Si-SiOx light-emitting structures, containing nanoparticles of silicon (nc-Si) in the oxide matrix and passivated in a solution of hydrofluoric acid (HF), has been investigated. The studied nc-Si-SiOx structures were produced by evaporation of Si monoxide (SiO) powder in vacuum and oblique deposition on Si wafer, and then the deposited silicon oxide (SiOx) films were annealed in the vacuum at 975 °C to grow nc-Si. It was found that the PM effect in the PL is observed only after passivation of nanostructures: during etching in HF solution, the initial symmetric nc-Si becomes asymmetric elongated. It was also found that in investigated nanostructures, there is a defined orientational dependence of the PL polarization degree (ρ) in the sample plane which correlates with the orientation of SiOx nanocolumns, forming the structure of the porous layer. The increase of the ρ values in the long-wavelength spectral range with time of HF treatment can be associated with increasing of the anisotropy of large Si nanoparticles. The PM effect for this spectral interval can be described by the dielectric model. In the short-wavelength spectral range, the dependence of the ρ values agrees qualitatively with the quantum confinement effect.

  7. Polarization memory effect in the photoluminescence of nc-Si-SiOx light-emitting structures.

    Science.gov (United States)

    Michailovska, Katerina; Indutnyi, Ivan; Shepeliavyi, Petro; Sopinskyy, Mykola

    2016-12-01

    The polarization memory (PM) effect in the photoluminescence (PL) of the porous nc-Si-SiOx light-emitting structures, containing nanoparticles of silicon (nc-Si) in the oxide matrix and passivated in a solution of hydrofluoric acid (HF), has been investigated. The studied nc-Si-SiOx structures were produced by evaporation of Si monoxide (SiO) powder in vacuum and oblique deposition on Si wafer, and then the deposited silicon oxide (SiOx) films were annealed in the vacuum at 975 °C to grow nc-Si. It was found that the PM effect in the PL is observed only after passivation of nanostructures: during etching in HF solution, the initial symmetric nc-Si becomes asymmetric elongated. It was also found that in investigated nanostructures, there is a defined orientational dependence of the PL polarization degree (ρ) in the sample plane which correlates with the orientation of SiOx nanocolumns, forming the structure of the porous layer. The increase of the ρ values in the long-wavelength spectral range with time of HF treatment can be associated with increasing of the anisotropy of large Si nanoparticles. The PM effect for this spectral interval can be described by the dielectric model. In the short-wavelength spectral range, the dependence of the ρ values agrees qualitatively with the quantum confinement effect. PMID:27255897

  8. Delta I=1/2 and ε'ε in Large-Nc QCD

    International Nuclear Information System (INIS)

    We present new results for the matrix elements of the Q6 and Q4 penguin operators, evaluated in a large-Nc approach which incorporates important O(Nc2/{nf}{Nc}) unfactorized contributions. Our approach shows analytic matching between short- and long-distance scale dependences within dimensional renormalization schemes, such as MS-bar. Numerically, we find that there is a large positive contribution to the Delta I =1/2 matrix element of Q6 and hence to the direct CP-violation parameter epsilon'/epsilon. We also present results for the Delta I = 1/2 rule in K→ππ amplitudes, which incorporate the related and important 'eye-diagram' contributions of O(Nc2/{1}/{Nc}) from the Q2 operator (i.e. the penguin-like contraction). The results lead to an enhancement of the Delta I = 1/2 effective coupling. The origin of the large unfactorized contributions which we find is discussed in terms of the relevant scales of the problem. (author)

  9. Areva At September 30, 2010: Revenue growth to euro 6.168 bn: + 6.3%. Backlog growth to euro 42.7 bn: + 2.2%

    International Nuclear Information System (INIS)

    AREVA generated consolidated revenue of 6.168 billion euros over the first nine months of 2010 for growth of 6.3% (+5.2% like-for-like) compared with the same period in 2009. The main revenue growth engines were the Reactors and Services Business Group and the Back End Business Group, with growth of 11.5% and 7.1% respectively. Foreign exchange had a positive impact of 82 million euros over the period, while changes in consolidation scope had negligible impact. Third quarter 2010 revenue amounted to 2.011 billion euros for growth of 6.1% (+4.4% LFL) compared with the third quarter of 2009. The Reactors and Services Business Group and the Back End Business Group, posting increases of 11.2% and 9.0% respectively, continued to lead this growth. Foreign exchange had a positive impact of 39 million euros, while changes in consolidation scope had negligible impact. The group's backlog came to 42.7 billion euros at September 30, 2010, an increase of 2.2% compared with September 30, 2009 (41.8 billion euros). For the full year of 2010, the group confirms its outlook for significant revenue and backlog growth, increased operating performance excluding particular items, negative operating income, and strong growth in net income attributable to owners of the group with the contribution of the gain on the sale of the Transmission and Distribution business

  10. Nuclear Quadrupole Hyperfine Structure in HC14N/H14NC and DC15N/D15NC Isomerization: A Diagnostic Tool for Characterizing Vibrational Localization

    CERN Document Server

    Wong, Bryan M

    2010-01-01

    Large-amplitude molecular motions which occur during isomerization can cause significant changes in electronic structure. These variations in electronic properties can be used to identify vibrationally-excited eigenstates which are localized along the potential energy surface. This work demonstrates that nuclear quadrupole hyperfine interactions can be used as a diagnostic marker of progress along the isomerization path in both the HC14N/H14NC and DC15N/D15NC chemical systems. Ab initio calculations at the CCSD(T)/cc-pCVQZ level indicate that the hyperfine interaction is extremely sensitive to the chemical bonding of the quadrupolar 14N nucleus and can therefore be used to determine in which potential well the vibrational wavefunction is localized. A natural bonding orbital analysis along the isomerization path further demonstrates that hyperfine interactions arise from the asphericity of the electron density at the quadrupolar nucleus. Using the CCSD(T) potential surface, the quadrupole coupling constants of...

  11. Max-Flow Problem in Undirected Planar Networks with Node Capacities Being in NC

    Institute of Scientific and Technical Information of China (English)

    Xian-Chao Zhang; Ying-Yu Wan; Guo-Liang Chen

    2004-01-01

    The max-flow problem in planar networks with only edge capacities has been proved to be in NC (Nickle's Class). This paper considers a more general version of the problem when the nodes as well as the edges have capacities. In a general network, the node-edge-capacity problem can be easily reduced to the edge-capacity problem. But in the case of planar network this reduction may destroy the planarity, and reduces the problem to the edge-capacity problem in a general network, which is P-complete. A recent contribution presents a new reduction for planar networks, that maintains the planarity. In this paper, it is proved that this reduction is in NC and thus the node-edge-capacity problem in undirected planar networks is in NC.

  12. NC INCREMENTAL SHEET METAL FORMING PROCESS AND VERTICAL WALL SQUARE BOX FORMING

    Institute of Scientific and Technical Information of China (English)

    Zhou Liuru; Mo Jianhua; Xiao Xiangzhi

    2004-01-01

    The forming principle and deformation analysis of NC incremental sheet metal forming process as well as the process planning, experiment and key process parameters of vertical wall square box forming are presented. Because the deformation of sheet metal only occurs around the tool head and the deformed region is subjected to stretch deformation, the deformed region of sheet metal thins, and surface area increases. Sheet metal forming stepwise is to lead to the whole sheet metal deformation. The forming half-apex angle θ and corner radius R are the main process parameters in NC incremental forming of vertical wall square box. According to sine law, a vertical wall square box can't be formed by NC incremental sheet metal forming process in a single process, rather, it must be formed in multi processes. Thus, the parallel line type tool path process method is presented to form the vertical wall square box, and the experiment and analysis are made to verify it.

  13. Compositional, structural and mechanical characteristics of nc-TiC/a-C:H nanocomposite films

    International Nuclear Information System (INIS)

    Nanocomposite nc-TiC/a-C:H films, with an unusual combination of superhardness, high elastic modulus and high elastic recovery, are prepared by filtered cathodic vacuum arc technique using the C2H2 gas as the precursor. The effects of filter coil current on compositional, structural and mechanical properties of the nc-TiC/a-C:H films have been investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy disperse spectroscopy (EDS), microindentation and tribotester measurements. XPS and Raman analyses show that composition and nanostructure of the nc-TiC/a-C:H films can be changed by varying the filter coil current. By selecting the proper value of filter coil current, 2.5 A, one can remarkably enhance the mechanical properties of films such as superhardness (43.6 GPa). The superhardness can be ascribed to the phase variation and the nanostructure.

  14. Non-convex prior image constrained compressed sensing (NC-PICCS)

    Science.gov (United States)

    Ramírez Giraldo, Juan Carlos; Trzasko, Joshua D.; Leng, Shuai; McCollough, Cynthia H.; Manduca, Armando

    2010-04-01

    The purpose of this paper is to present a new image reconstruction algorithm for dynamic data, termed non-convex prior image constrained compressed sensing (NC-PICCS). It generalizes the prior image constrained compressed sensing (PICCS) algorithm with the use of non-convex priors. Here, we concentrate on perfusion studies using computed tomography examples in simulated phantoms (with and without added noise) and in vivo data, to show how the NC-PICCS method holds potential for dramatic reductions in radiation dose for time-resolved CT imaging. We show that NC-PICCS can provide additional undersampling compared to conventional convex compressed sensing and PICCS, as well as, faster convergence under a quasi-Newton numerical solver.

  15. Tricolor microcavity OLEDs based on P-nc-Si:H films as the complex anodes

    Institute of Scientific and Technical Information of China (English)

    Li Yang; Liu Xingyuan; Wu Chunya; Meng Zhiguo; Wang Yi; Xiong Shaozhen

    2009-01-01

    A P+-nc-Si:H film (boron-doped nc-Si:H thin film) was used as a complex anode of an OLED. As an ideal candidate for the composite anode, the P+-nc-Si:H thin film has a good conductivity with a high work function (~5.7 eV) and outstanding optical properties of high reflectivity, transmission, and a very low absorption. As a result, the combination of the relatively high reflectivity of a P+-nc-Si:H film/ITO complex anode with the very high reflectivity of an Al cathode could form a micro-cavity structure with a certain Q to improve the efficiency of the OLED fabricated on it. An RGB pixel generated by microcavity OLEDs is beneficial for both the reduction of the light loss and the improvement of the color purity and the efficiency. The small molecule Alq would be useful for the emitting light layer (EML) of the MOLED, and the P+-nc-Si film would be used as a complex anode of the MOLED, whose configuration can be constructed as Glass/LTO/P+-nc-Si:H/ITO/MoO3/NPB/Alq/LiF/Al. By adjusting the thickness of the organic layer NPB/Alq, the optical length of the microcavity and the REB colors of the device can be obtained. The peak wavelengths of an OLED are located at 486, 550, and 608 nm, respectively.The CIE coordinates are (0.21,0.45), (0.33,0.63), and (0.54,0.54), and the full widths at half maximum (FWHM)are 35, 32, and 39 nm for red, green, and blue, respectively.

  16. Role of the NC-loop in catalytic activity and stability in lipase from Fervidobacterium changbaicum.

    Directory of Open Access Journals (Sweden)

    Binchun Li

    Full Text Available Flexible NC-loops between the catalytic domain and the cap domain of the α/β hydrolase fold enzymes show remarkable diversity in length, sequence, and configuration. Recent investigations have suggested that the NC-loop might be involved in catalysis and substrate recognition in many enzymes from the α/β hydrolase fold superfamily. To foster a deep understanding of its role in catalysis, stability, and divergent evolution, we here systemically investigated the function of the NC-loop (residues 131-151 in a lipase (FClip1 from thermophilic bacterium Fervidobacterium changbaicum by loop deletion, alanine-scanning mutagenesis and site-directed mutagenesis. We found that the upper part of the NC-loop (residues 131-138 was of great importance to enzyme catalysis. Single substitutions in this region could fine-tune the activity of FClip1 as much as 41-fold, and any deletions from this region rendered the enzyme completely inactive. The lower part of the NC-loop (residues 139-151 was capable of enduring extensive deletions without loss of activity. The shortened mutants in this region were found to show both improved activity and increased stability simultaneously. We therefore speculated that the NC-loop, especially the lower part, would be a perfect target for enzyme engineering to optimize the enzymatic properties, and might present a hot zone for the divergent evolution of α/β hydrolases. Our findings may provide an opportunity for better understanding of the mechanism of divergent evolution in the α/β hydrolase fold superfamily, and may also guide the design of novel biocatalysts for industrial applications.

  17. Sublimation of the Endohedral Fullerene Er3N@C80

    OpenAIRE

    Stibor, Alexander; Schefzyk, Hannah; Fortágh, József

    2009-01-01

    The heat of sublimation of the endohedral metallofullerene Er3N@C80 was measured via Knudsen effusion mass spectrometry. The large molecule consists of a C80 fullerene cage which is stabilized by comprising a complex of three erbium atoms bounded to a nitrogen atom and has a mass of 1475 amu. The mass spectrum at a temperature of 1045 K and the relative intensities of the thermal fractions of Er3N@C80 are provided. We also discuss possible thermal decomposition processes for these particles. ...

  18. A Search for Neutrino Induced Coherent NC($\\pi^{0}$) Production in the MINOS Near Detector

    Energy Technology Data Exchange (ETDEWEB)

    Cherdack, Daniel David [Tufts Univ., Medford, MA (United States)

    2011-02-01

    The production of single, highly forward π0 mesons by NC coherent neutrino-nucleus interactions (νμ + N → νμ + N + π0) is a process which probes fundamental aspects of the weak interaction. This reaction may also pose as a limiting background for long baseline searches for νμ → νe oscillations if the neutrino mixing angle θ13 is very small. The high-statistics sample of neutrino interactions recorded by the MINOS Near Detector provides an opportunity to measure the cross section of this coherent reaction on a relatively large-A nucleus at an average Ev = 4.9 GeV. A major challenge for this measurement is the isolation of forward-going electromagnetic (EM) showers produced by the relatively rare coherent NC0) process amidst an abundant rate of incoherently produced EM showers. The backgrounds arise from single π0 dominated NC events and also from quasi-elastic-like CC scattering of electron neutrinos. In this Thesis the theory of coherent interactions is summarized, and previous measurements of the coherent NC0) cross section are reviewed. Then, methods for selecting a sample of coherent NC0) like events, extracting the coherent NC0) event rate from that sample, estimating the analysis uncertainties, and calculating a cross section, are presented. A signal for neutrino-induced NC0) production is observed in the relevant kinematic regime as an excess of events of three standard deviations above background. The reaction cross sections, averaged over an energy window of 2.5 ≤ Ev ≤ 9.0 GeV is determined to be (31.6±10.5) x 10-40 cm2/nucleus. The result is the first evidence obtained for neutrino-nucleus coherent NC0) scattering on iron, and is the first measurement on an average nuclear target above A = 30. The cross section measurement

  19. CyNC - a method for Real Time Analysis of Systems with Cyclic Data Flows

    DEFF Research Database (Denmark)

    Schiøler, Henrik; Nielsen, Jens F. Dalsgaard; Larsen, Kim Guldstrand;

    2005-01-01

    The paper addresses a novel method for realtime analysis of systems with cyclic data flows. The presented method is based on Network Calculus principles, where upper and lower flow and service constraint are used to bound data flows and processing resources. In acyclic systems flow constraints may...... equation in a space of constraint functions. In this paper a method denoted CyNC for obtaining a well defined solution to that problem is presented along with a theoretical justification of the method as well as comparative results for CyNC and alternative methods on a relevant example. The method is...

  20. Thermal Phase Transition in Weakly Interacting Large $N_c$ QCD

    CERN Document Server

    Hallin, J; Hallin, Joakim; Persson, David

    1998-01-01

    We consider thermal QCD in the large N_C limit, mainly in 1+1 dimensions. The gauge coupling is only taken into account to minimal order, by projection onto colour singlets. An expression for the free energy, exact as N_C goes to infinity, is then obtained. A third order phase transition will occur. The critical temperature depends on the ratio N_C/L, where L is the (infinite) spatial length. In the high temperature limit, the free energy will approach the same value as in the free theory, whereas we have a mesonic like phase at low temperature. Expressions for the quark condensate, , are also obtained.

  1. Covariant meson-baryon scattering with chiral and large Nc constraints

    International Nuclear Information System (INIS)

    We give a review of recent progress on the application of the relativistic chiral SU(3) Lagrangian to meson-baryon scattering. It is shown that a combined chiral and 1/Nc expansion of the Bethe-Salpeter interaction kernel leads to a good description of the kaon-nucleon, antikaon-nucleon and pion-nucleon scattering data typically up to laboratory momenta of plab ≅ 500 MeV. We solve the covariant coupled channel Bethe-Salpeter equation with the interaction kernel truncated to chiral order Q3 where we include only those terms which are leading in the large Nc limit of QCD. (orig.)

  2. The NC Power Supply Design of Large Current and Wide Frequency Pulse in SEAM

    OpenAIRE

    Jianping Zhou; Yan Xu; Qiang He; Bisheng Zhou

    2013-01-01

    There are a lot of ways to achieve large current pulse power supply, and the more common way is to adopt the inverter switching circuit to achieve pulse power supply. The core of the NC power supply design of large current and wide frequency pulse in SEAM is using two-stage modulation. Combined with inverter technology, DC chopper technology and NC technology, it not only can achieve the adjustability of the output pulse amplitude, but also can realize continuous adjustment of the output puls...

  3. Microarray analysis of ncRNA expression patterns in Caenorhabditis elegans after RNAi against snoRNA associated proteins

    Directory of Open Access Journals (Sweden)

    Skogerbø Geir

    2008-06-01

    Full Text Available Abstract Background Short non-coding RNAs (ncRNAs perform their cellular functions in ribonucleoprotein (RNP complexes, which are also essential for maintaining the stability of the ncRNAs. Depletion of individual protein components of non-coding ribonucleoprotein (ncRNP particles by RNA interference (RNAi may therefore affect expression levels of the corresponding ncRNA, and depletion of candidate associated proteins may constitute an alternative strategy when investigating ncRNA-protein interactions and ncRNA functions. Therefore, we carried out a pilot study in which the effects of RNAi against protein components of small nucleolar RNPs (snoRNPs in Caenorhabditis elegans were observed on an ncRNA microarray. Results RNAi against individual C. elegans protein components of snoRNPs produced strongly reduced mRNA levels and distinct phenotypes for all targeted proteins. For each type of snoRNP, individual depletion of at least three of the four protein components produced significant (P ≦ 1.2 × 10-5 reductions in the expression levels of the corresponding small nucleolar RNAs (snoRNAs, whereas the expression levels of other ncRNAs were largely unaffected. The effects of depletion of individual proteins were in accordance with snoRNP structure analyses obtained in other species for all but two of the eight targeted proteins. Variations in snoRNA size, sequence and secondary structure characteristics were not systematically reflected in the affinity for individual protein component of snoRNPs. The data supported the classification of nearly all annotated snoRNAs and suggested the presence of several novel snoRNAs among unclassified short ncRNA transcripts. A number of transcripts containing canonical Sm binding element sequences (Sm Y RNAs also showed reduced expression after depletion of protein components of C/D box snoRNPs, whereas the expression of some stem-bulge RNAs (sbRNAs was increased after depletion of the same proteins. Conclusion

  4. 微腔中nc-Si/SiN超晶格的光致发光%Photoluminescence of nc-Si/SiN Superlattices Embedded in Optical Microcavities

    Institute of Scientific and Technical Information of China (English)

    陈三; 黄信凡; 钱波; 陈坤基; 岑展鸿; 刘艳松; 韩培高; 马忠元; 徐骏; 李伟

    2006-01-01

    We fabricate a-Si/a-SiNz superlattices and a one-dimensional amorphous silicon nitride photonic crystal microcavity by plasma enhancement chemical vapor deposition (PECVD). To improve the light-emitting efficiency of the nc-Si/a-SiNz superlattices, which are made from a-Si/a-SiNz superlattices by laser annealing, an nc-Si quantum dot array is inserted into the photonic crystal microcavity. Raman spectroscopy and transmission electron microscopy analysis show that nc-Si with a size of 4nm,which is close to the designed thickness of the a-Si sublayers,is formed in the a-Si sublayers. Owing to microcavity effects,the PL peak of the nc-Si/a-SiNz superlattices embedded in the microcavity is strongly narrowed, and the intensity of the PL is enhanced by two orders of magnitude with respect to the emission of λ/2-thick nc-Si/a-SiNz superlattices. Light emission at a cavity-resonant frequency from the nc-Si/a-SiNz superlattices is enhanced while other frequencies are forbidden. This leads to the narrowing of the PL spectrum and enhancement of the intensity.%研究了一维光子晶体微腔结构对nc-Si/a-SiNz超晶格发射的调制.一维光子晶体微腔采用两种具有不同折射率的非化学组分非晶氮化硅的周期调制结构,腔中嵌入采用激光晶化方法制备的硅量子点阵列,从Raman谱和透射电子显微镜分析得到其尺寸约为3~4 nm.从光致发光谱上观察到明显的选模作用、明显变窄的发光峰以及约两个量级的发光强度的增强.微腔对硅量子点阵列发光的调制主要表现在两个方面:共振模式的增强和非共振模式的抑制.硅量子点中位于腔共振模式的辐射跃迁被增强,非共振模式的辐射跃迁被抑制,因此位于腔共振频率处的跃迁通道成为硅量子点中唯一的辐射跃迁通道,导致光致发光谱的窄化和强度的增强.因此,在提高硅材料发光效率方面,光子晶体微腔具有非常大的应用前景.

  5. 75 FR 65278 - Pamlico Sound and Adjacent Waters, NC; Danger Zones for Marine Corps Operations

    Science.gov (United States)

    2010-10-22

    ... of Engineers, Department of the Army 33 CFR Part 334 Pamlico Sound and Adjacent Waters, NC; Danger... its regulations to establish one new danger zone in Pamlico Sound near Marine Corps Air Station Cherry Point, North Carolina. Establishment of this danger zone will enable the Marine Corps to control...

  6. 76 FR 30023 - Pamlico Sound and Adjacent Waters, NC; Danger Zones for Marine Corps Operations

    Science.gov (United States)

    2011-05-24

    ..., 2010, issue of the Federal Register (75 FR 65278) with the docket number COE-2010-0037 and one comment... of Engineers, Department of the Army 33 CFR Part 334 Pamlico Sound and Adjacent Waters, NC; Danger.... SUMMARY: The U.S. Army Corps of Engineers is amending its regulations to establish a new danger zone....

  7. Anaerobic Oxidation of Methane Coupled to Nitrite Reduction by Halophilic Marine NC10 Bacteria.

    Science.gov (United States)

    He, Zhanfei; Geng, Sha; Cai, Chaoyang; Liu, Shuai; Liu, Yan; Pan, Yawei; Lou, Liping; Zheng, Ping; Xu, Xinhua; Hu, Baolan

    2015-08-15

    Anaerobic oxidation of methane (AOM) coupled to nitrite reduction is a novel AOM process that is mediated by denitrifying methanotrophs. To date, enrichments of these denitrifying methanotrophs have been confined to freshwater systems; however, the recent findings of 16S rRNA and pmoA gene sequences in marine sediments suggest a possible occurrence of AOM coupled to nitrite reduction in marine systems. In this research, a marine denitrifying methanotrophic culture was obtained after 20 months of enrichment. Activity testing and quantitative PCR (qPCR) analysis were then conducted and showed that the methane oxidation activity and the number of NC10 bacteria increased correlatively during the enrichment period. 16S rRNA gene sequencing indicated that only bacteria in group A of the NC10 phylum were enriched and responsible for the resulting methane oxidation activity, although a diverse community of NC10 bacteria was harbored in the inoculum. Fluorescence in situ hybridization showed that NC10 bacteria were dominant in the enrichment culture after 20 months. The effect of salinity on the marine denitrifying methanotrophic culture was investigated, and the apparent optimal salinity was 20.5‰, which suggested that halophilic bacterial AOM coupled to nitrite reduction was obtained. Moreover, the apparent substrate affinity coefficients of the halophilic denitrifying methanotrophs were determined to be 9.8 ± 2.2 μM for methane and 8.7 ± 1.5 μM for nitrite. PMID:26048927

  8. Size effect of fullerene cages and encaged clusters in M3N@C2n

    Institute of Scientific and Technical Information of China (English)

    GAN LiHua

    2009-01-01

    Based on the calculated findings that the sizes of encaged clusters determine the structures and the stability of C80-based trimetallic nitride fullerenes (TNFs), more extensive density functional theory calculations were performed on M3N@C68, M3N@C78 and M3N@C80 (M=Sc, Y and La). The calculated results demonstrated that the structures and stability undergo a transition with the increasing of the sizes of the cages and clusters. Sc3N is planar inside the three considered cages, Y3N is slightly pyramidal inside C68-6140 and C78-5 and planar inside Ih C80-7, however, La3N is pyramidal inside all the three cages. Those cages with pyramidal clusters inside deformed considerably, compared with their parent cages. In these cases, the bonding of metallic atoms toward the cages does not play an impor-tant role, and the encaged cluster tends to be located inside the cages with the largest M-M and M-C distances so that the strain energy can be released mostly. These calculations revealed the size effect of fullerene cages and encaged clusters, and can explain the position priority of M3N inside fullerene cages and the differences in yield of M3N@C2n.

  9. 75 FR 62320 - Safety Zone; Fireworks for USS GRAVELY Commissioning Ceremony, Cape Fear River, Wilmington, NC

    Science.gov (United States)

    2010-10-08

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Fireworks for USS GRAVELY Commissioning..., NC in support of the Fireworks for the USS GRAVELY Commissioning Ceremony. This action is necessary... area. Basis and Purpose On November 19, 2010, the USS GRAVELY Commissioning Committee will sponsor...

  10. Fabrication and Characteristics of an nc-Si/c-Si Heterojunction MOSFETs Pressure Sensor

    Directory of Open Access Journals (Sweden)

    Xiaofeng Zhao

    2012-05-01

    Full Text Available A novel nc-Si/c-Si heterojunction MOSFETs pressure sensor is proposed in this paper, with four p-MOSFETs with nc-Si/c-Si heterojunction as source and drain. The four p-MOSFETs are designed and fabricated on a square silicon membrane by CMOS process and MEMS technology where channel resistances of the four nc-Si/c-Si heterojunction MOSFETs form a Wheatstone bridge. When the additional pressure is P, the nc-Si/c-Si heterojunction MOSFETs pressure sensor can measure this additional pressure P. The experimental results show that when the supply voltage is 3 V, length-width (L:W ratio is 2:1, and the silicon membrane thickness is 75 μm, the full scale output voltage of the pressure sensor is 15.50 mV at room temperature, and pressure sensitivity is 0.097 mV/kPa. When the supply voltage and L:W ratio are the same as the above, and the silicon membrane thickness is 45 μm, the full scale output voltage is 43.05 mV, and pressure sensitivity is 2.153 mV/kPa. Therefore, the sensor has higher sensitivity and good temperature characteristics compared to the traditional piezoresistive pressure sensor.

  11. 77 FR 50444 - Safety Zone, Atlantic Intracoastal Waterway; Carolina Beach, NC

    Science.gov (United States)

    2012-08-21

    ... Beach, NC AGENCY: Coast Guard, DHS. ACTION: Notice of Proposed Rulemaking. SUMMARY: The Coast Guard... Carolina Beach, North Carolina. The safety zone is necessary to provide for the safety of mariners on..., mile 295.6, at Carolina Beach, North Carolina. The safety zone will temporarily restrict...

  12. 76 FR 14970 - National Starch and Chemical Company, Salisbury, Rowan County, NC; Notice of Settlement

    Science.gov (United States)

    2011-03-18

    ... AGENCY National Starch and Chemical Company, Salisbury, Rowan County, NC; Notice of Settlement AGENCY... National Starch and Chemical Company Site located in Mobile, Mobile County, Alabama for publication. DATES..., identified by Docket ID No. EPA-RO4- SFUND-2011-0278 or Site name National Starch and Chemical...

  13. 78 FR 15797 - Eastern Band of Cherokee Indians Disaster #NC-00049

    Science.gov (United States)

    2013-03-12

    ... ADMINISTRATION Eastern Band of Cherokee Indians Disaster NC-00049 AGENCY: U.S. Small Business Administration... Assistance Only for the Eastern Band of Cherokee Indians (FEMA-4103-DR), dated 03/01/2013. Incident: Severe... adversely affected by the disaster: Primary Areas: Eastern Band of Cherokee Indians and Associated...

  14. 77 FR 34215 - Special Local Regulations for Marine Events, Swim Event; Lake Gaston, Littleton, NC

    Science.gov (United States)

    2012-06-11

    ..., Swim Event, Lake Gaston; Littleton, NC'' in the Federal Register (77 FR 19954). We received no comments... FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information The... SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulations for Marine Events, Swim...

  15. Colloidal Behavior of Fullerenes (nC60): Role of Coions

    Science.gov (United States)

    Effects of coions on the average initial aggregate size (DH) and zeta potential (ZP) of nC60 in mono and divalent counterion (10 mM) systems were investigated at pH 3, 5.8, and 10. Differences in the effects of SO42-and Cl- could not be established, in presence of Na+, for all pH...

  16. 75 FR 17792 - North Carolina Disaster # NC-00025 Declaration of Economic Injury

    Science.gov (United States)

    2010-04-07

    ... ADMINISTRATION North Carolina Disaster NC-00025 Declaration of Economic Injury AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a notice of an Economic Injury Disaster Loan (EIDL) declaration... the Administrator's EIDL declaration, applications for economic injury disaster loans may be filed...

  17. Investigation on the foaming behaviors of NC-based gun propellants

    Institute of Scientific and Technical Information of China (English)

    Yu-xiang LI; Wei-tao YANG; San-jiu YING

    2014-01-01

    To prepare the porous NC-based (nitrocellulose-based) gun propellants, the batch foaming process of using supercritical CO2 as the physical blowing agent is used. The solubilities of CO2 in the single-base propellants and TEGDN (trimethyleneglycol dinitrate) propellants are measured by the gravimetric method, and SEM (scanning electron microscope) is used to observe the morphology of foamed propellants. The result shows that a large amount of CO2 could be dissolved in NC-based propellants. The experimental results also reveal that the energetic plasticizer TEGDN exerts an important influence on the pore structure. The triaxial tensile failure mechanism for solid-state nucleation is used to explain the nucleation of NC-based propellants in the solid state. Since some specific foaming behaviors of NC-based propellants can not be explained by the failure mechanism, a solid-state nucleation mechanism which revises the triaxial tensile failure mechanism is proposed and discussed. Copyright © 2014, China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved.

  18. Size effect of fullerene cages and encaged clusters in M3N@C2n

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Based on the calculated findings that the sizes of encaged clusters determine the structures and the stability of C80-based trimetallic nitride fullerenes (TNFs), more extensive density functional theory calculations were performed on M3N@C68, M3N@C78 and M3N@C80 (M=Sc, Y and La). The calculated results demonstrated that the structures and stability undergo a transition with the increasing of the sizes of the cages and clusters. Sc3N is planar inside the three considered cages, Y3N is slightly pyramidal inside C68-6140 and C78-5 and planar inside I h C80-7, however, La3N is pyramidal inside all the three cages. Those cages with pyramidal clusters inside deformed considerably, compared with their parent cages. In these cases, the bonding of metallic atoms toward the cages does not play an impor-tant role, and the encaged cluster tends to be located inside the cages with the largest M-M and M-C distances so that the strain energy can be released mostly. These calculations revealed the size effect of fullerene cages and encaged clusters, and can explain the position priority of M3N inside fullerene cages and the differences in yield of M3N@C2n.

  19. 76 FR 29647 - Safety Zone; Big Rock Blue Marlin Air Show; Bogue Sound, Morehead City, NC

    Science.gov (United States)

    2011-05-23

    ... 400 yards south of the shoreline of Morehead City. (b) Definition: For the purposes of this section..., Morehead City, NC AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is... held over the waters of Bogue Sound, adjacent to Morehead City, North Carolina. This Safety Zone...

  20. SYNTHESIS AND THERMAL STABILITY OF NANOCOMPOSITE nc-TiN/a-TiB2 THIN FILMS

    Institute of Scientific and Technical Information of China (English)

    Y.H. Lu; Z.F. Zhou; P. Sit; Y.G. Shen; K.Y. Li; H. Chen

    2005-01-01

    Several nc-TiN/a-TiB2 thin films comprised of nanocrystalline (nc-) TiN and amorphous (a-) TiB2phases were deposited on Si(100)at room temperature by reactive unbalanced dc magnetron sputtering, followed by vacuum annealed at 400, 600, 800 and 1000℃ for 1h, respectively. Effects of B content on microstructure, mechanical behaviors and thermal microstructure stability have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and nanoindentation measurements. The results indicated that B addition greatly affected both microstructure and mechanieal behavior of nc-TiN/a-TiB2 thin films. With increasing B content the grain size decreased. A maximum hardness value of about 33GPa was obtained at B content of about 19at. %. The improved mechanical properties of nc-TiN/a-TiB2films with the addition of B into TiN were attributed to their densified microstructure with development of fine grain size. Only addition of sufficient B could restrain grain growth during annealing. High B content resulted in high microstructure stability. The crystallization of amorphous matrix occurred at about 800℃, forming TiB or TiB2 crystallite, depending on B content. Before that no change in bonding configuration was found.

  1. Joint NC-ARQ and AMC for QoS-Guaranteed Mobile Multicast

    DEFF Research Database (Denmark)

    Wang, Haibo; Schwefel, Hans-Peter; Chu, Xiaoli;

    2010-01-01

    will not necessarily be limited by the worst channel anymore, and improved spectral efficiency may be obtained in the efficiency-reliability tradeoff. In this paper, we first propose a Network-Coding-based ARQ (NC-ARQ) scheme in its optimal form and suboptimal form (denoted as Opt-ARQ and SubOpt-ARQ, resp.) to solve...

  2. Data of evolutionary structure change: 1D5NC-1UNFX [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available msd> 1.0891029834747314 EVID> 1 1UNF...1D5NC-1UNFX 1D5N 1UNF C X ----SYTLPSLPYAYDALEPHFDKQTMEIHHTKHHQTYV...NNANAALESL----PEFANLPVEELITKLDQLPADKKTVL---------RNNAGGHANHSLFWKGLKKGT--TLQGDLKAAIERDFGSVDNFKAEFEKAAASRFGSGW...HH EVID> 0 TRP CA 380 1UNF X 1UNF

  3. 77 FR 3326 - Cancellation of Environmental Impact Statement in Orange County, NC

    Science.gov (United States)

    2012-01-23

    ... [Federal Register Volume 77, Number 14 (Monday, January 23, 2012)] [Notices] [Page 3326] [FR Doc.... Clarence W. Coleman, Jr., Preconstruction and Environmental Team Leader, Raleigh, North Carolina. [FR Doc... Environmental Impact Statement in Orange County, NC AGENCY: Federal Highway Administration (FHWA),...

  4. 75 FR 81269 - Ward Transformer Superfund Site Raleigh, Wake County, NC; Notice of Settlements

    Science.gov (United States)

    2010-12-27

    ... AGENCY Ward Transformer Superfund Site Raleigh, Wake County, NC; Notice of Settlements AGENCY... Ward Transformer Superfund Site located in Raleigh, Wake County, North Carolina for publication. DATES... your comments, identified by Docket ID No. EPA-RO4- SFUND-2010-1053 or Site name Ward...

  5. 78 FR 14543 - Ward Transformer Superfund Site; Raleigh, Wake County, NC; Notice of Settlement

    Science.gov (United States)

    2013-03-06

    ... AGENCY Ward Transformer Superfund Site; Raleigh, Wake County, NC; Notice of Settlement AGENCY... Agency has entered into a settlement at the Ward Transformer Superfund Site located in Raleigh, Wake... EPA Region 4 contact Ms. Paula V. Painter. Submit your comments by Site name Ward...

  6. 33 CFR 334.420 - Pamlico Sound and adjacent waters, N.C.; danger zones for Marine Corps operations.

    Science.gov (United States)

    2010-07-01

    ..., N.C.; danger zones for Marine Corps operations. 334.420 Section 334.420 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.420 Pamlico Sound and adjacent waters, N.C.; danger zones for Marine Corps operations....

  7. Sulphur and oxygen sequestration of n-C37 and n-C38 unsaturated ketones in an immature kerogen and the release of their carbon skeletons during early stages of thermal maturation

    Science.gov (United States)

    Koopmans, M.P.; Schaeffer-Reiss, C.; De Leeuw, J. W.; Lewan, M.D.; Maxwell, J.R.; Schaeffer, P.; Sinninghe, Damste J.S.

    1997-01-01

    Sedimentary rock from the Gessoso-solfifera Formation (Messinian) in the Vena del Gesso Basin (northern Italy) containing immature (Ro = 0.25%) S-rich organic matter was artificially matured by hydrous pyrolysis at temperatures from 160 to 330??C for 72 h to study the diagenetic fate of n-C37 and n-C38 di-and tri-unsaturated methyl and ethyl ketones (alkenones) biosynthesised by several prymnesiophyte algae. During early diagenesis, the alkenones are incorporated into the kerogen by both sulphur and oxygen cross-linking as indicated by chemical degradation experiments with the kerogen of the unheated sample. Heating at temperatures between 160 and 260??C, which still represents early stages of thermal maturation, produces large amounts (up to 1 mg/g TOC) of S-bound, O-bound, and both S-and O-bound n-C37 and n-C38 skeletons, saturated n-C37 and n-C38 methyl, ethyl, and mid-chain ketones, C37 and C38 mid-chain 2,5-di-n-alkylthiophenes, C37 and C38 1,2-di-n-alkylbenzenes, and C37 and C38 n-alkanes. With increasing thermal maturation, three forms of the n-C37 and n-C38 skeletons are relatively stable (saturated hydrocarbons, 1,2-di-n-alkylbenzenes and saturated ketones), whereas the S-and O-bound skeletons are relatively labile. These results suggest that in natural situations saturated ketones with an n-C37 and n-C38 skeleton can be expected as well as the corresponding hydrocarbons. Copyright ?? 1997 Elsevier Science Ltd.

  8. NC2213: a novel methionine aminopeptidase 2 inhibitor in human colon cancer HT29 cells

    Directory of Open Access Journals (Sweden)

    Pati Hari N

    2009-08-01

    Full Text Available Abstract Methionine aminopeptidase 2 (MetAP2 is a bifunctional protein that plays a critical role in the regulation of post-translational processing and protein synthesis. MetAP2 is overexpressed in human colon cancer. In this report we screened various MetAP2 inhibitors and treated HT29 cells with various concentrations of compounds. We evaluated the expression of MetAP2 and pp60c-src expressions in HT29 cells. In addition we also carried out the cell proliferation and cell cycle analysis in the MetAP2 inhibitor-treated HT29 cells. The cell cycle analysis of HT29 treated with 1.0 μM of NC2213 showed an arrest in the G2 phase followed by an induction in the percentage of cells undergoing apoptosis in the sub-G1 phase. Western blot analysis revealed that the MetAP2 expression was dose-dependently decreased when the HT29 cells were treated with the 3,5-bis(benzylidene-4-piperidone derivative (NC2213. In addition, phosphorylation of Src, a myristoylated oncoprotein was significantly decreased by 1.0 μM of NC2213 as revealed by Western blot analysis. Furthermore, NC2213 also inhibits the expression of pp60c-src in HT29 cells. Interestingly, this compound also inhibits the phosphorylation at Tyr416 of pp60c-src while increasing the phosphorylation at Tyr527 of pp60c-src. NC2213 inhibits the growth of HT29 cells by inducing apoptosis and might be useful for the treatment of human colon cancer.

  9. Ground State Reactions of nC60 with Free Chlorine in Water.

    Science.gov (United States)

    Wu, Jiewei; Benoit, Denise; Lee, Seung Soo; Li, Wenlu; Fortner, John D

    2016-01-19

    Facile, photoenhanced transformations of water-stable C60 aggregates (nC60) to oxidized, soluble fullerene derivatives, have been described as key processes in understanding the ultimate environmental fate of fullerene based materials. In contrast, fewer studies have evaluated the aqueous reactivity of nC60 during ground-state conditions (i.e., dark conditions). Herein, this study identifies and characterizes the physicochemical transformations of C60 (as nC60 suspensions) in the presence of free chlorine, a globally used chemical oxidant, in the absence of light under environmentally relevant conditions. Results show that nC60 undergoes significant oxidation in the presence of free chlorine and the oxidation reaction rates increase with free chlorine concentration while being inversely related to solution pH. Product characterization by FTIR, XPS, Raman Spectroscopy, TEM, XRD, TOC, collectively demonstrates that oxidized C60 derivatives are readily formed in the presence of free chlorine with extensive covalent oxygen and even chlorine additions, and behave as soft (or loose) clusters in solution. Aggregation kinetics, as a function of pH and ionic strength/type, show a significant increase in product stabilities for all cases evaluated, even at pH values approaching 1. As expected with increased (surface) oxidation, classic Kow partitioning studies indicate that product clusters are relatively more hydrophilic than parent (reactant) nC60. Taken together, this work highlights the importance of understanding nanomaterial reactivity and the identification of corresponding stable daughter products, which are likely to differ significantly from parent material properties and behaviors.

  10. Dynamical Interpretation of the Nucleon-Nucleon Interaction and Exchange Currents in the Large $N_C$ Limit

    CERN Document Server

    Riska, D O

    2002-01-01

    Expression of the nucleon-nucleon Interaction to order $1/N_C$ in terms of Fermi Invariants allows a dynamical interpretation of the interaction and leads to a consistent construction of the associated interaction currents to order $1/N_C$. The numerically significant components of 4 different modern realistic phenomenological interaction models are shown to admit very similar meson exchange interpretations in the large $N_C$ limit. Moreover the ratio of the volume integrals of the leading, next-to-leading and next-to-next leading order terms in these interaction models is roughly 300:5-10:0.1, which corresponds fairly well to the ratios of $1/N_C^2$ between the terms that would be suggested by the $1/N_C$ expansion if $N_C=3$. The $N_C$ dependence of the electromagnetic and axial interaction currents that are associated with these interaction components is derived and compared to that of the corresponding single nucleon currents.

  11. 数控专用主板设计%The design of NC special motherboard

    Institute of Scientific and Technical Information of China (English)

    张赞秋; 高岩; 罗迪; 杨松山; 苏升力

    2012-01-01

    Application of NC system based on the harsh environment, presents a special CNC design of the motherboard, the motherboard integrated design. For vibration, dust, strong electromagnetic interference and other issues put forward a solution, discussed a number of ways so as to meet NC System requirements.%根据数控系统应用的严酷环境,介绍了一种数控专用主板的设计.该主板一体化设计,并针对振动、粉尘、强烈电磁干扰等问题提出了一个解决方案,讨论了一些方法使之满足数控系统要求.

  12. An automatic 3D CAD model errors detection method of aircraft structural part for NC machining

    Directory of Open Access Journals (Sweden)

    Bo Huang

    2015-10-01

    Full Text Available Feature-based NC machining, which requires high quality of 3D CAD model, is widely used in machining aircraft structural part. However, there has been little research on how to automatically detect the CAD model errors. As a result, the user has to manually check the errors with great effort before NC programming. This paper proposes an automatic CAD model errors detection approach for aircraft structural part. First, the base faces are identified based on the reference directions corresponding to machining coordinate systems. Then, the CAD models are partitioned into multiple local regions based on the base faces. Finally, the CAD model error types are evaluated based on the heuristic rules. A prototype system based on CATIA has been developed to verify the effectiveness of the proposed approach.

  13. Research on cubic polynomial acceleration and deceleration control model for high speed NC machining

    Institute of Scientific and Technical Information of China (English)

    Hong-bin LENG; Yi-jie WU; Xiao-hong PAN

    2008-01-01

    To satisfy the need of high speed NC (numerical control) machining, an acceleration and deceleration (aec/dec) control model is proposed, and the speed curve is also constructed by the cubic polynomial. The proposed control model provides continuity of acceleration, which avoids the intense vibration in high speed NC machining. Based on the discrete characteristic of the data sampling interpolation, the acc/dec control discrete mathematical model is also set up and the discrete expression of the theoretical deceleration length is obtained furthermore. Aiming at the question of hardly predetermining the deceleration point in acc/dec control before interpolation, the adaptive acc/dec control algorithm is deduced from the expressions of the theoretical deceleration length. The experimental result proves that the acc/dec control model has the characteristic of easy implementation, stable movement and low impact. The model has been applied in multi-axes high speed micro fabrication machining successfully.

  14. Entanglement Entropy Renormalization for the NC scalar field coupled to classical BTZ geometry

    CERN Document Server

    Jurić, Tajron

    2016-01-01

    In this work, we consider a noncommutative (NC) massless scalar field coupled to the classical nonrotational BTZ geometry. In a manner of the theories where the gravity emerges from the underlying scalar field theory, we study the effective action and the entropy derived from this noncommutative model. In particular, the entropy is calculated by making use of the two different approaches, the brick wall method and the heat kernel method designed for spaces with conical singularity. We show that the UV divergent structures of the entropy, obtained through these two different methods, agree with each other. It is also shown that the same renormalization condition that removes the infinities from the effective action can also be used to renormalize the entanglement entropy for the same system. Besides, the interesting feature of the NC model considered here is that it allows an interpretation in terms of an equivalent system comprising of a commutative massive scalar field, but in a modified geometry; that of th...

  15. Resonant tunnelling in nc-Si/SiO2 multilayers at room temperature

    Institute of Scientific and Technical Information of China (English)

    Chen Deyuan

    2011-01-01

    Nc-Si/SiO2 multilayers were fabricated on silicon wafers in a plasma enhanced chemical vapour deposition system using in situ oxidation technology,followed by three-step thermal treatments.Carrier transportation at room temperature is characterized by current voltage measurement,and negative different conductances can be observed both under forward and negative biases,which is explained by resonant tunnelling.The resonant tunnelling peak voltage is related to the thicknesses of the nc-Si and SiO2 sublayers.And the resonant tunnelling peak voltage under negative bias is larger than that under forward bias.An energy band diagram and an equivalent circuit diagram were constructed to analyze and explain the above transportation process and properties.

  16. Aerobic oxidation of hydroxymethylfurfural and furfural by using heterogeneous Cox Oy -N@C catalysts.

    Science.gov (United States)

    Deng, Jin; Song, Hai-Jie; Cui, Min-Shu; Du, Yi-Ping; Fu, Yao

    2014-12-01

    2,5-Furandicarboxylic acid (FDCA) is considered to be a promising replacement for terephthalic acid since they share similar structures and properties. In contrast to FDCA, 2,5-furandicarboxylic acid methyl (FDCAM) has properties that allow it to be easily purified. In this work, we reported an oxidative esterification of 5-hydroxymethylfurfural (HMF) and furfural to prepare corresponding esters over Cox Oy -N@C catalysts using O2 as benign oxidant. High yield and selectivity of FDCAM and methyl 2-furoate were obtained under optimized conditions. Factors which influenced the product distribution were examined thoroughly. The Cox Oy -N@C catalysts were recycled five times and no significant loss of activity was detected. Characterization of the catalysts could explain such phenomena. Using XPS and TGA, we made a thorough investigation of the effects of ligand and pyrolysis temperature on catalyst activity.

  17. First ITER Council convened in Cadarache - historic step in the quest for clean Energy 28 November 2007 Cadarache

    CERN Multimedia

    Hay, Jennifer

    2007-01-01

    "On 27 November 2007, the ITER Council convened for the first time in the history of the new International Organization. Opening the meeting, Dr Werner Burkart, Deputy Director of the International Atomic Energy Agency (AIEA), said: "Let me congratulate all who have contributed to the achievements of the ITER initiative to date.... (1,5 page)

  18. EPR investigation of N@C$_{70}$ in polycrystalline C$_{70}$ and single wall carbon nanotubes

    OpenAIRE

    Dinse, Klaus-Peter; Corzilius, Björn; Jakes, Peter; Weiden, Norbert; Agarwal, Suman

    2008-01-01

    Abstract Using multi frequency electron paramagnetic resonance (EPR) it was possible to determine the inherent fine structure (FS) interaction of nitrogen encapsulated in a C$_{70}$ cage. Confinement of N@C$_{70}$ in single wall carbon nanotubes (SWNT) of rather wide diameter does not significantly influence this value. The transition between isotropic molecular tumbling and immobilisation was found to occur at about 170~K in both matrices, indicating that the hindra...

  19. Schwinger-Dyson and Large $N_{c}$ Loop Equation for Supersymmetric Yang-Mills Theory

    OpenAIRE

    Itoyama, H.; Takashino, H.

    1996-01-01

    We derive an infinite sequence of Schwinger-Dyson equations for $N=1$ supersymmetric Yang-Mills theory. The fundamental and the only variable employed is the Wilson-loop geometrically represented in $N=1$ superspace: it organizes an infinite number of supersymmetrizing insertions into the ordinary Wilson-loop as a single entity. In the large $N_{c}$ limit, our equation becomes a closed loop equation for the one-point function of the Wilson-loop average.

  20. $(\\alpha')^4$ Corrections in Holographic Large $N_c$ QCD and $\\pi - \\pi$ Scattering

    CERN Document Server

    Parthasarathy, R

    2007-01-01

    We calculate the ${\\alpha'}^4$ corrections to the non-Abelian DBI action on the $D8$-brane in the holographic dual of large $N_c$ QCD proposed by Sakai and Sugimoto. These give rise to higher derivative terms, in particular, four derivative contact terms for the pion field with the coupling uniquely determined. We calculate the pion-pion scattering amplitude near threshold. The results respecting unitarity are in agreement with the experimental curves.

  1. Resonance sum rules from large $N_C$ and partial wave dispersive analysis

    CERN Document Server

    Guo, Zhi-Hui

    2008-01-01

    Combining large $N_C$ techniques and partial wave dispersion theory to analyze the $\\pi\\pi$ scattering, without relying on any explicit resonance lagrangian, some interesting results are derived: (a) a general KSRF relation including the scalar meson contribution; (b) a new relation between resonance couplings, with which we have made an intensive analysis in several specific models; (c) low energy constants in chiral perturbation theory related with $\\pi\\pi$ scattering in terms of the mass and decay width of resonances.

  2. One step towards the fabrication of a nanoscale Si-nc based laser cavity

    International Nuclear Information System (INIS)

    In this paper, we report on the design of two major components of a laser architecture using Si-nc embedded in SiO2 as the optical gain medium and sub-wavelength periodic structures to form the resonant cavity. Dimensions of the structures have been matched to near-infrared wavelengths (∼850 nm) of the maximum photoluminescent emission where optical gain has been observed from Si-nc. Both the front (FM) and rear (RM) mirrors have been fabricated by the implantation of Si ions (50 keV, 2x1017 Si+/cm2) through a mask, in order to produce a Bragg reflector by optical index contrast between the implanted and the non-implanted zones. Two closely spaced Bragg reflectors are used in the FM structure to allow a narrow bandpass (partial transmission) centered at 850 nm. The implanted structures have been annealed to produce Si-nc and passivation. Scanning electron microscopy (SEM) images show that the design dimensions of the structure have been obtained. Characterization of the structures by laser excitation reveals an optical gap in both mirrors between 825 and 870 nm, as per the design parameters. A quality factor Q∼95 and a reflectivity R∼0.2 have been measured for the FM. These results support the concept that a complete Si-nc based laser cavity can be built to emit coherent light. - Research Highlights: → Ion implantation through a mask has been used to produce sub-wavelength periodic structures. → Bragg mirror has been tested as a part of Si-nanocrystals' laser architecture. → Numerical simulations have revealed an optical band gap as per the design parameters.

  3. Development of a community cancer education program: the Forsyth County, NC cervical cancer prevention project.

    OpenAIRE

    Michielutte, R; Dignan, M B; Wells, H B; Young, L. D.; Jackson, D S; Sharp, P C

    1989-01-01

    The authors outline the development and implementation of a public health education program for cervical cancer screening among black women in Forsyth County, NC. The educational program includes distributing electronic and printed information media messages, a program of direct education for women, and providing information on current issues in cervical screening to primary-care physicians. Program development was based on social marketing principles, the PRECEDE model, and the communication...

  4. STUDY ON NEW METHOD OF IDENTIFYING GEOMETRIC ERROR PARAMETERS FOR NC MACHINE TOOLS

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The methods of identifying geometric error parameters for NC machine tools are introduced. According to analyzing and comparing the different methods, a new method-displacement method with 9 lines is developed based on the theories of the movement errors of multibody system (MBS). A lot of experiments are also made to obtain 21 terms geometric error parameters by using the error identification software based on the new method.

  5. 长虹NC-2机心通病检修

    Institute of Scientific and Technical Information of China (English)

    何金华

    2001-01-01

    @@ 长虹NC-2机心是九十年代初长虹公司和日本东芝公司联合研制并成功开发的机心.该机心已陪同用户走过了近十个春秋,也大批量陆续进入了故障期.在维修中,发现该机心有如下六种通病.

  6. ColorMath - A package for color summed calculations in SU(Nc)

    CERN Document Server

    Sjödahl, Malin

    2012-01-01

    A Mathematica package for color summed calculations in QCD (SU(Nc)) is presented. Color contractions of any color amplitude appearing in QCD may be performed, and the package uses a syntax which is very similar to how color structure is written on paper. It also supports the definition of color vectors and bases, and special functions such as scalar products are defined for such color tensors.

  7. Joint NC-ARQ and AMC for QoS-Guaranteed Mobile Multicast

    Directory of Open Access Journals (Sweden)

    Schwefel Hans-Peter

    2010-01-01

    Full Text Available In mobile multicast transmissions, the receiver with the worst instantaneous channel condition limits the transmission data rate under the desired Quality-of-Service (QoS constraints. If Automatic Repeat reQuest (ARQ schemes are applied, the selection of Adaptive Modulation and Coding (AMC mode will not necessarily be limited by the worst channel anymore, and improved spectral efficiency may be obtained in the efficiency-reliability tradeoff. In this paper, we first propose a Network-Coding-based ARQ (NC-ARQ scheme in its optimal form and suboptimal form (denoted as Opt-ARQ and SubOpt-ARQ, resp. to solve the scalability problem of applying ARQ in multicast. Then we propose two joint NC-ARQ-AMC schemes, namely, the Average PER-based AMC (AvgPER-AMC with Opt-ARQ and AvgPER-AMC with SubOpt-ARQ in a cross-layer design framework to maximize the average spectral efficiency per receiver under specific QoS constraints. The performance is analyzed under Rayleigh fading channels for different group sizes, and numerical results show that significant gains in spectral efficiency can be achieved with the proposed joint NC-ARQ-AMC schemes compared with the existing multicast ARQ and/or AMC schemes.

  8. Bayesian Reliability Modeling and Assessment Solution for NC Machine Tools under Small-sample Data

    Institute of Scientific and Technical Information of China (English)

    YANG Zhaojun; KAN Yingnan; CHEN Fei; XU Binbin; CHEN Chuanhai; YANG Chuangui

    2015-01-01

    Although Markov chain Monte Carlo(MCMC) algorithms are accurate, many factors may cause instability when they are utilized in reliability analysis; such instability makes these algorithms unsuitable for widespread engineering applications. Thus, a reliability modeling and assessment solution aimed at small-sample data of numerical control(NC) machine tools is proposed on the basis of Bayes theories. An expert-judgment process of fusing multi-source prior information is developed to obtain the Weibull parameters’ prior distributions and reduce the subjective bias of usual expert-judgment methods. The grid approximation method is applied to two-parameter Weibull distribution to derive the formulas for the parameters’ posterior distributions and solve the calculation difficulty of high-dimensional integration. The method is then applied to the real data of a type of NC machine tool to implement a reliability assessment and obtain the mean time between failures(MTBF). The relative error of the proposed method is 5.8020×10-4 compared with the MTBF obtained by the MCMC algorithm. This result indicates that the proposed method is as accurate as MCMC. The newly developed solution for reliability modeling and assessment of NC machine tools under small-sample data is easy, practical, and highly suitable for widespread application in the engineering field; in addition, the solution does not reduce accuracy.

  9. The C$^{14}$N/C$^{15}$N Ratio in Diffuse Molecular Clouds

    CERN Document Server

    Ritchey, Adam M; Lambert, David L

    2015-01-01

    We report the first detection of C$^{15}$N in diffuse molecular gas from a detailed examination of CN absorption lines in archival VLT/UVES spectra of stars probing local diffuse clouds. Absorption from the C$^{15}$N isotopologue is confidently detected (at $\\gtrsim4\\sigma$) in three out of the four directions studied and appears as a very weak feature between the main $^{12}$CN and $^{13}$CN absorption components. Column densities for each CN isotopologue are determined through profile fitting, after accounting for weak additional line-of-sight components of $^{12}$CN, which are seen in the absorption profiles of CH and CH$^+$ as well. The weighted mean value of C$^{14}$N/C$^{15}$N for the three sight lines with detections of C$^{15}$N is $274\\pm18$. Since the diffuse molecular clouds toward our target stars have relatively high gas kinetic temperatures and relatively low visual extinctions, their C$^{14}$N/C$^{15}$N ratios should not be affected by chemical fractionation. The mean C$^{14}$N/C$^{15}$N ratio ...

  10. Density of Saturated Nuclear Matter at Large $N_{c}$ and Heavy Quark Mass Limits

    CERN Document Server

    Adhikari, Prabal; Datta, Ishaun

    2013-01-01

    We exhibit the existence of stable, saturated nuclear matter in the large $N_{c}$ and heavy quark mass limits of QCD. In this limit, baryons (with the same spin flavor structure) interact at leading order in $N_{c}$ via a repulsive interaction due to the Pauli exclusion principle and at subleading order in $1/N_c$ via the exchange of glueballs. Assuming that the lightest glueball is a scalar, which implies that the subleading baryon interaction is attractive, we find that nuclear matter saturates since the subleading attractive interaction is longer ranged than the leading order repulsive one. We find that the saturated matter is in the form of a crystal with either a face-centered cubic or a hexagonal-close-packed symmetry with baryon densities of $\\mathcal{O}((\\, \\tilde{\\alpha}_{s} m_q (\\ln (N_{c}m_{q}\\Lambda_{\\textrm{QCD}}^{-1}))^{-1})^3 )$. Remarkably, the leading order expression for the density of saturated nuclear matter is independent of the lighest glueball mass and scalar-glueball-baryon coupling in...

  11. l3a81nc.m77t - MGD77 data file for Geophysical data from field activity L-3A-81-NC in Central Coast, Northern California from 04/16/1981 to 04/26/1981

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-3A-81-NC in Central Coast, Northern...

  12. l382nc.m77t - MGD77 data file for Geophysical data from field activity L-3-82-NC in Off San Mateo County, Northern California from 02/27/1982 to 03/01/1982

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-3-82-NC in Off San Mateo County,...

  13. l477nc.m77t - MGD77 data file for Geophysical data from field activity L-4-77-NC in Northern California from 05/10/1977 to 05/21/1977

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-4-77-NC in Northern California from...

  14. l282nc.m77t - MGD77 data file for Geophysical data from field activity L-2-82-NC in Off San Mateo, Northern California from 02/07/1982 to 02/12/1982

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-2-82-NC in Off San Mateo, Northern...

  15. c180nc.m77t - MGD77 data file for Geophysical data from field activity C-1-80-NC in Monterey Bay, Northern California from 05/21/1980 to 05/22/1980

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with transit satellite navigation data was collected as part of field activity C-1-80-NC in Monterey Bay, Northern California from...

  16. Areva At December 31, 2010: Revenue rises to euros 9.104 bn: + 6.7% Backlog rises to euros 44.2 bn: + 2.0%

    International Nuclear Information System (INIS)

    In 2010, AREVA's consolidated revenue rose 6.7% to 9.104 billion euros (+ 5.1% growth like-for-like) compared with 2009. The Mining-Front End Business Group and the Reactors and Services Business Group were the leading growth engines, with revenue growth of 6.7% and 8.9% respectively. Foreign exchange had a positive impact of 141 million euros and the scope of consolidation remained stable over the period. Fourth quarter 2010 revenue totaled 2.936 billion euros, an increase of 7.7% (+4.8% like-for-like) compared with the fourth quarter of 2009, due in particular to 18.1% growth in the Mining-Front End BG. Foreign exchange had an impact of 58 million euros over the period. The group's backlog came to 44.2 billion euros at December 31, 2010, up 2.0% in relation to December 31, 2009. The backlog grew in the Mining-Front End and Renewable Energies BGs. Installed Base Business operations held up well, replenishing the backlog for the Reactors and Services BG. The agreement with the Indian utility NPCIL concerning the construction of two EPRTM reactors and fuel cycle supply for 25 years was not recorded in the backlog at December 31, 2010. The change in the Back End BG's backlog reflects the implementation of contracts signed in previous years. Nearly one billion euros in letters of intent signed in 2010 with US utilities corresponding to pre-sold production from the future enrichment plant were not included in the Mining-Front End BG's backlog. The backlog of the Mining-Front End BG came to 28.902 billion euros at December 31, 2010, up 4% compared with the end of 2009. Contracts won in 2010 include: - the 10-year uranium supply contract with CGNPC for approximately 3.5 billion dollars; - several other multi-year contracts signed in the front end of the cycle with US and Asian utilities. For the full year of 2010, the Mining-Front End BG reported revenue of 3.704 billion euros, an increase of 6.7% on a reported basis and of 4.2% LFL. Foreign exchange had a positive

  17. Fabrication of nc-Si/SiO2 structure by thermal oxidation method and its luminescence characteristics

    Institute of Scientific and Technical Information of China (English)

    Haojie Zhang; Longzhi Lin; Shaoji Jiang

    2009-01-01

    Nano-crystalline silicon/silicon oxide (nc-Si/SiO2) structures have been prepared from amorphous silicon films on both silicon and quartz substrates by using electron-beam evaporation approach and annealing at temperatures about 600℃ in air. As a thermal oxidation procedure, the annealing treatment is not only a crystallization process but also an oxidation process. Scanning electron microscopy is employed to characterize the surface morphology of the nc-Si/SiO2 layers. Transmission electron microscopy study shows the sizes of nc-Si grains on the two different substrates. The nc-Si/SiO2 structures exhibit visible luminescence at room temperature as confirmed by photoluminescence spectroscopy. Comparing the pho- toluminescence spectra of different samples, our results agree with the quantum confinement-luminescence center model.

  18. Correlation between Light Emissions from Amorphous-Si:H/SiO2 and nc-Si/SiO2 Multilayers

    Institute of Scientific and Technical Information of China (English)

    MA Zhong-Yuan; HUANG Xin-Fan; CHEN Kun-Ji; FENG Duan; HAN Pei-Gao; LI Wei; CHEN De-Yuan; WEI De-Yuan; QIAN Bo; LI Wei; XU Jun; XU Ling

    2007-01-01

    We investigate the properties of light emission from amorphous-Si:H/SiO2 and nc-Si/SiO2 multilayers (MLs). The size dependence of light emission is well exhibited when the a-Si:H sublayer thickness is thinner than 4nm and the interface states are well passivated by hydrogen. For the nc-Si/SiO2 MLs, the oxygen modified interface states and nanocrystalline silicon play a predominant role in the properties of light emission. It is found that the light emission from nc-Si/SiO2 is in agreement with the model of interface state combining with quantum confinement when the size of nc-Si is smaller than 4 nm. The role of hydrogen and oxygen is discussed in detail.

  19. Generating SU(Nc) pure gauge lattice QCD configurations on GPUs with CUDA and OpenMP

    CERN Document Server

    Cardoso, Nuno

    2011-01-01

    The starting point of any lattice QCD computation is the generation of a Markov chain of gauge field configurations. Due to the large number of lattice links and due to the matrix multiplications, generating SU(Nc) lattice QCD configurations is a highly demanding computational task, requiring advanced computer parallel architectures such as clusters of several Central Processing Units (CPUs) or Graphics Processing Units (GPUs). In this paper we present and explore the performance of CUDA codes for NVIDIA GPUs to generate SU(Nc) lattice QCD pure gauge configurations. Our implementation in one GPU uses CUDA and in multiple GPUs uses OpenMP and CUDA. We present optimized CUDA codes SU(2), SU(3) and SU(4). We also show a generic SU(Nc) code for Nc$\\,\\geq 4$ and compare it with the optimized version of SU(4). Our codes are publicly available for free use by the lattice QCD community.

  20. Resonant Tunnelling and Storage of Electrons in Si Nanocrystals within a-SiNx/nc-Si/a-SiNx Structures

    Institute of Scientific and Technical Information of China (English)

    WANG Xiang; HUANG Jian; ZHANG Xian-Gao; DING Hong-Lin; YU Lin-Wei; HUANG Xin-Fan; LI Wei; XU Jun; CHEN Kun-Ji

    2008-01-01

    @@ The a-SiNx/nanocrystalline silicon (nc-Si)/a-SiNx sandwiched structures with asymmetric double-barrier are fabricated in a plasma enhanced chemical vapour deposition (PECVD) system on p-type Si substrates. The nc-Si layer in thickness 5nm is fabricated from a hydrogen-diluted silane gas by the layer-by-layer deposition technique. The thicknesses of tunnel and control SiNx layers are 3nm and 20nm,respectively. Frequency-dependent capacitance spectroscopy is used to study the electron tunnelling and the storage in the sandwiched structures.Distinct frequency-dependent capacitance peaks due to electrons tunnelling into the nc-Si dots and capacitance-voltage (C- V) hysteresis characteristic due to electrons storage in the nc-Si dots are observed with the same sample.

  1. The theta^+ baryon in soliton models: large Nc QCD and the validity of rigid-rotor quantization

    OpenAIRE

    Cohen, Thomas D.

    2003-01-01

    A light collective theta+ baryon state (with strangeness +1) was predicted via rigid-rotor collective quantization of SU(3) chiral soliton models. This paper explores the validity of this treatment. A number of rather general analyses suggest that predictions of exotic baryon properties based on this approximation do not follow from large Nc QCD. These include an analysis of the baryon's width, a comparison of the predictions with general large Nc consistency conditions of the Gervais-Sakita-...

  2. Low temperature p+ nc-Si:H window layers for large area thin-film solar cells

    OpenAIRE

    Tse, Wing Fai Lydia

    2007-01-01

    Hydrogenated nanocrystalline silicon (nc-Si:H) has attracted attention recently over amorphous silicon (a-Si:H) for use in thin-film solar cell applications primarily due to its higher stability and light absorbing capacity. In addition, there is increasing interest in device fabrication on low-cost, light weight and flexible substrates where optimizing deposition conditions of nc-Si:H thin films at low substrate temperatures (< 200 °C) poses challenges. In such solar cells, the thin boron...

  3. Implementation of Real-Time Machining Process Control Based on Fuzzy Logic in a New STEP-NC Compatible System

    Directory of Open Access Journals (Sweden)

    Po Hu

    2016-01-01

    Full Text Available Implementing real-time machining process control at shop floor has great significance on raising the efficiency and quality of product manufacturing. A framework and implementation methods of real-time machining process control based on STEP-NC are presented in this paper. Data model compatible with ISO 14649 standard is built to transfer high-level real-time machining process control information between CAPP systems and CNC systems, in which EXPRESS language is used to define new STEP-NC entities. Methods for implementing real-time machining process control at shop floor are studied and realized on an open STEP-NC controller, which is developed using object-oriented, multithread, and shared memory technologies conjunctively. Cutting force at specific direction of machining feature in side mill is chosen to be controlled object, and a fuzzy control algorithm with self-adjusting factor is designed and embedded in the software CNC kernel of STEP-NC controller. Experiments are carried out to verify the proposed framework, STEP-NC data model, and implementation methods for real-time machining process control. The results of experiments prove that real-time machining process control tasks can be interpreted and executed correctly by the STEP-NC controller at shop floor, in which actual cutting force is kept around ideal value, whether axial cutting depth changes suddenly or continuously.

  4. Evaluation of health risks related to the operation of the AREVA sites of the Tricastin platform: Georges Besse plants I and II, SOCATRI, COGEMA Pierrelatte and COMURHEX (first level approach) Assessment of health studies. Final report

    International Nuclear Information System (INIS)

    This document reports the study of health risks related to the chemical toxicity of species related to the operation of several AREVA installations in Tricastin. A qualitative and quantitative inventory of the species released in the atmosphere and in waters is based on data supplied by the operator. A selection of health tracers has lead to a global investigation of nitrogen oxides, sulphur dioxide, fluorine, uranium, arsenic, hexavalent chromium, mercury and nickel. The hazard associated with each of these species has been characterized. Different exposure ways have been considered: inhalation, soil ingestion, by vegetable, fruit and crop ingestion, ingestion of meat, milk and eggs produced by local breeding, fish ingestion, and ingestion of water sampled from the Tricastin aquifer. Atmospheric concentrations, soil deposits, surface soil layer concentrations, and other concentrations (in meat, milk, eggs, crops, vegetables, fruits, and drinking water) have been either modelled or measured. Different exposure scenarios have been defined, and the different risks (carcinogen or not) have been assessed

  5. Areva - 2013 revenue of euro 9.3 bn thanks to sustained level of activity. Organic growth in the nuclear operations: + 7%, above our financial outlook. Backlog of euro 41.6 bn

    International Nuclear Information System (INIS)

    Two years after Fukushima, AREVA's level of activity was especially strong in 2013. The group outperformed its revenue outlook for nuclear operations with an organic growth of 7.1%. With more than 9 billion euros, the group's revenue benefited from the robustness of the recurring activities and from temporary elements, such as exceptionally high uranium sales. This growth demonstrates the resilience of Areva's end market, despite unfavourable current conditions, and the efficient match between its commercial offers and customers' expectations. Capitalizing on this dynamic, the group will continue its recovery in order to sustainably self-finance its capital expenditures. After the announcement on January 20, 2014 of exclusive negotiations with Gamesa for the creation of a joint company in the offshore wind field (50% AREVA, 50% Gamesa), and in accordance with IFRS 5 accounting standard, revenue generated by the Wind Energy business is not included in group revenue for 2012 and 2013 and the result of this business will be presented on a separate line, 'net income from discontinued operations' in the 2013 financial statements. In 2013, AREVA had consolidated revenue of 9.303 billion euros, an increase of 3.8% (+6.3% like for like) compared with 2012 benefiting from strong organic growth in the nuclear operations: - Revenue in the nuclear operations was 9.042 billion euros in 2013, compared with 8.633 billion euros in 2012, a 7.1% increase (+4.7% on a reported basis). Revenue was led by the Mining BG (+40.6% like for like) and the Front End BG (+7.5% like for like), offsetting the expected business downturn in the Reactors and Services BG (-1.5% like for like). Revenue was stable in the Back End BG (-0.6% like for like). - The Renewable Energies BG had 132 million euros in revenue, down from 2012 (-24.7% like for like). - Foreign exchange had a negative impact of 101 million euros, while the change in consolidation scope and accounting methods had a negative impact of

  6. L'émergence de formes nouvelles dans le parler ncàm (bassar) moderne

    OpenAIRE

    ADOUNA, Gbandi

    2014-01-01

    International audience Le ncàm fait partie des langues qui ont le plus conservé le système des classes nominales. Mais de nos jours, l'on assiste à l'émergence de certaines formes, en contradiction avec le système classique, notamment dans le processus de relativisation. Si, au niveau classique, à une classe nominale donnée correspond un relateur spécifique, de nos jours, la tendance semble quelque peu inversée, et l'on tend vers une simplification des formes (au lieu d'un relateur spécial...

  7. Comparison of the Gottfried and Adler sum rules within the large-Nc expansion

    OpenAIRE

    Broadhurst, D. J.; Kataev, A. L.; Maxwell, C. J.

    2004-01-01

    The Adler sum rule for deep inelastic neutrino scattering measures the isospin of the nucleon and is hence exact. By contrast, the corresponding Gottfried sum rule for charged lepton scattering was based merely on a valence picture and is modified both by perturbative and non-perturbative effects. Noting that the known perturbative corrections to two-loop order are suppressed by a factor 1/N_c^2, relative to those for higher moments, we propose that this suppression persists at higher orders ...

  8. A finite element analysis of an SSC dipole magnet (NC-9 cross-section)

    International Nuclear Information System (INIS)

    Finite element methods are used to calculate the mechanical behavior of an SSC superconducting dipole magnet under different loading conditions. A two-dimensional model of the NC-9 design (aluminum collars) has been developed and used to calculate the transverse deflections and stresses in the dipole after assembly of the magnet, cooldown to 4.2 K, and energization to 6.6 T. Verification of the results with experimental measurements and observations, and limitations of the analysis, are also discussed. 6 refs., 6 figs., 2 tabs

  9. Areva at September 30, 2013: Backlog of euro 42 bn Robust revenue growth to euro 6.847 bn: +4.7% vs. Sept. 2012 (+7.6% like for like) Strong organic growth (+9.9%) in the nuclear operations

    International Nuclear Information System (INIS)

    After a remarkable first half and as anticipated, Areva's third quarter revenue was stable in the nuclear operations compared with the third quarter of 2012. Globally, Areva's nuclear operations generated organic growth of 10% in the first nine months of 2013. This performance demonstrates the strength of Areva's commercial positions in the installed base market, where the company continues to innovate while improving its competitiveness. The success of Areva's integrated offers and of its Safety Alliance and Forward Alliance programs are perfect examples of this. Moreover, agreements signed for the EDF project at Hinkley Point strengthen Areva's position in the new builds market and bolster the credibility of Areva's EPRTM offers to other customers. In the Renewable Energies BG, revenue is below Areva's Action 2016 plan outlook, mainly due to the current indecisiveness in the renewable markets. Based on Areva's performance over the past nine months, the company confirms its revenue outlook for its business as a whole in 2013. AREVA generated consolidated revenue of 6.847 billion euros in the first nine months of 2013, representing growth of 4.7% (+7.6% like for like) compared with the same period in 2012. Revenue growth was fueled by a 7.7% increase in recurring business (+11.0% like for like). Revenue from nuclear operations was 6.453 billion euros in the first nine months of 2013, compared with 6.035 billion euros in the first nine months of 2012, a 6.9% increase (+9.9% like for like). Revenue was led by growth in all nuclear Business Groups (BG): the Mining BG (+31.8% like for like), the Front End BG (+9.8% like for like), the Reactors and Services BG (+1.5% like for like) and the Back End BG (+10.3% like for like). Revenue fell 24.6% like for like in the renewable operations. Foreign exchange had a negative impact of 71 million euros during the period. The change in consolidation scope had a negative impact of 106 million euros. In the third quarter of 2013

  10. The baryon axial current in large $N_c$ chiral perturbation theory

    CERN Document Server

    Hernandez-Ruiz, Maria A

    2014-01-01

    In this thesis we calculate the baryon axial current within the combined framework of the $1/N_c$ expansion and chiral perturbation theory, where $N_c$ is the number of colors. This calculation shall consider Feynman diagrams to order of one-loop, octet and decuplet intermediaries states. We obtain corrections due to one-loop and perturbative SU(3) symmetry breaking. The first corrections come from Feynman diagrams, then talk about a broken chiral symmetry in the implicit limit $m_q \\rightarrow 0$, where $m_q$ is the quark mass and the second corrections are obtained by ignoring isospin breaking and in that case the SU(3) symmetry breaking a first-order perturbation is included, leading an explicit break symmetry. The matrix elements of the spatial components of the axial operator between the states of the spin flavor symmetry, give the typical values of the axial vector coupling. For the baryon octet, links axial vector are $g_A$, just as they are defined in experiments of baryon semileptonic decays, where $...

  11. Influence of substrate bias voltage on the microstructure of nc-SiOx:H film

    Institute of Scientific and Technical Information of China (English)

    李慧敏; 于威; 徐艳梅; 季云; 蒋昭毅; 王新占; 李晓苇; 傅广生

    2015-01-01

    Amorphous silicon oxide containing nanocrystalline silicon grain (nc-SiOx:H) films are prepared by plasma-enhanced chemical vapor deposition technique at different negative substrate bias voltages. The influence of bias voltage applied to substrate on the microstructure is investigated. The analysis of x-ray diffraction spectra evidences the in-situ growth of nanocrystalline Si. The grain size can be well controlled by varying the substrate bias voltage, and the largest size is obtained at 60 V. Fourier transform infrared spectra studies on the microstructure evolutions of the nc-SiOx:H films suggest that the absorption peak intensities which are related to the defect densities can be well controlled. It can be attributed to the fact that the negative bias voltage provides a useful way to change the energies of the particles in the deposition process, which can provide sufficient driving force for the diffusion and movement for the species on the growing surface and effectively passivate the dangling bonds. Also the larger grain size and lower band gap which will result in better photosensitivity can also be obtained with a moderate substrate bias voltage of 60 V.

  12. Global Currents, Phase Transitions, and Chiral Symmetry Breaking in Large N_c Gauge Theory

    CERN Document Server

    Albash, T; Johnson, C V; Kundu, A; Albash, Tameem; Filev, Veselin; Johnson, Clifford V.; Kundu, Arnab

    2006-01-01

    We study the finite temperature dynamics of SU(N_c) gauge theory for large N_c, with fundamental quark flavours in a quenched approximation, in the presence of a fixed charge under a global current. We observe several notable phenomena. There is a first order phase transition where the quark condensate jumps discontinuously at finite quark mass, generalizing similar transitions seen at zero charge. We find a non-zero condensate at zero quark mass above a critical value of the charge, corresponding to an analogue of spontaneous chiral symmetry breaking at finite number density. We find that the spectrum of mesons contains the expected associated Goldstone (``pion'') degrees of freedom with a mass dependence on the quark mass that is consistent with the Gell-Mann-Oakes-Renner relation. Our tool in these studies is holography, the string dual of the gauge theory being the geometry of $N_c$ spinning D3-branes at finite temperature, probed by a D7-brane.

  13. Comparison of the Gottfried and Adler sum rules within the large-Nc expansion

    International Nuclear Information System (INIS)

    The Adler sum rule for deep inelastic neutrino scattering measures the isospin of the nucleon and is hence exact. By contrast, the corresponding Gottfried sum rule for charged lepton scattering was based merely on a valence picture and is modified both by perturbative and by non-perturbative effects. Noting that the known perturbative corrections to two-loop order are suppressed by a factor 1/Nc2, relative to those for higher moments, we propose that this suppression persists at higher orders and also applies to higher-twist effects. Moreover, we propose that the differences between the corresponding radiative corrections to higher non-singlet moments in charged-lepton and neutrino deep inelastic scattering are suppressed by 1/Nc2, in all orders of perturbation theory. For the first moment, in the Gottfried sum rule, the substantial discrepancy between the measured value and the valence-model expectation may be attributed to an intrinsic isospin asymmetry in the nucleon sea, as is indeed the case in a chiral-soliton model, where the discrepancy persists in the limit Nc→∞

  14. Effect of frictions on cross section quality of thin-walled tube NC bending

    Institute of Scientific and Technical Information of China (English)

    YANG He; GU Rui-jie; ZHAN Mei; LI Heng

    2006-01-01

    The effect of frictions between dies and tube on the cross section quality of thin-walled tube numerical controlled(NC) bending was studied by numerical simulation method, combined with theoretical analysis and experiment. The results show that the frictions between mandrel, wiper, pressure die, bending die and tube have a significant and complicate effect on the section quality of thin-walled tube NC bending. To improve the section quality, frictions between mandrel, wiper and tube should be decreased, but the frictions between the pressure die, bending die and tube increase. The effect on the section distortion is more significant from mandrel, wiper, pressure die to bending die and the effect on the wall thinning more significant from mandrel, pressure die, wiper, to bending die. The effects of frictions between all dies and tube on wall thinning are smaller than their effects on section distortion.Mandrel and wiper should be lubricated well and drawing oil is used to lubricate them in actual production. The frictions between pressure die, bending die and tube should be increased and the dry friction is used between pressure die, bending die and tube in actual production.

  15. Level of Competence of Food & Beverage Services NC II Passers: Basis for Strengthening the Training Program in Western Visayas

    Directory of Open Access Journals (Sweden)

    Raymund B. Moreno

    2014-02-01

    Full Text Available This study aimed to assess the level of competence of Food and Beverage Services NC II certified passers in Western Visayas as part of ensuring that what industry wants (stated as a competency standards comes back in outcomes of training (represented by a credential issued to a learner. Moreover, the result of the study serves as the basis for designing a proposed training plan in strengthening the Food and Beverage Services NC II Training Program in Western Visayas. The study surveyed 50 Food and Beverage Services Certified NC II Passers and 8 supervisors assigned in different hotel establishments in Western Visayas using the survey questionnaire based from TESDA’s training regulations for Food and Beverage Services NC II to collect relevant data from the population of the study. The data was analyzed using frequency count, means, standard deviation, ranks and SPSS software for statistical analysis. Results of the study based on the data culled from the respondents’ collated scores showed that NC II passers are fully aware of the competencies required by the industry in their workplace. T –tests indicated that there are significant differences among the responses of participants NC II passers and their respective supervisors. The obtained p value of 0 .008, 0 .006 and 0 .000 for t- test paired differences was less than 0 .05 alpha levels on basic, common and core competencies. Study also showed that there is a varying degree of responses on the perceived level of competence of Food and Beverage Services NC II passers in Western Visayas in all competencies as rated by the NC II passers’ themselves compared to the ratings of their respective supervisors. Thus, this study supported to the thesis that on the perceived level of competence based on the core competencies, both respondents are in agreement in the importance of executive bodies of national systems that work in the field of competencies standardization and/or certification

  16. Spin-flavor structure of chiral-odd generalized parton distributions in the large-Nc limit

    Science.gov (United States)

    Schweitzer, P.; Weiss, C.

    2016-10-01

    We study the spin-flavor structure of the nucleon's chiral-odd generalized parton distributions (transversity GPDs) in the large-Nc limit of QCD. In contrast to the chiral-even case, only three combinations of the four chiral-odd GPDs are nonzero in the leading order of the 1 /Nc expansion: E¯T=ET+2 H˜T,HT , and E˜T. The degeneracy is explained by the absence of spin-orbit interactions correlating the transverse momentum transfer with the transverse quark spin. It can also be deduced from the natural Nc scaling of the quark-nucleon helicity amplitudes associated with the GPDs. In the GPD E¯T the flavor-singlet component u +d is leading in the 1 /Nc expansion, while in HT and E˜T it is the flavor-nonsinglet components u -d . The large-Nc relations are consistent with the spin-flavor structure extracted from hard exclusive π0 and η electroproduction data, if it is assumed that the processes are mediated by twist-3 amplitudes involving the chiral-odd GPDs and the chiral-odd pseudoscalar meson distribution amplitudes.

  17. Tunable photoluminescence from nc-Si/a-SiNx:H quantum dot thin films prepared by ICP-CVD.

    Science.gov (United States)

    Sain, Basudeb; Das, Debajyoti

    2013-03-21

    Intense visible photoluminescence (PL) tunable within 1.66-2.47 eV, under UV 325 nm excitation, was obtained from nanocrystalline silicon quantum dots (∼5.72-1.67 nm in diameter) embedded in amorphous silicon-nitride matrix (nc-Si/a-SiN(x):H) prepared in RF-ICPCVD (13.56 MHz) at substrate temperatures between 400 to 150 °C. The dominant component of PL, having a narrow band width of ∼0.16-0.45 eV, originates from quasi-direct band-to-band recombination due to quantum confinement effect (QCE) in the nanocrystalline silicon quantum dots (nc-Si QDs) of appropriate size; however, the contribution of defects arose at lower substrate temperatures leading to asymmetric broadening. Intense atomic hydrogen flux in high-density inductively coupled plasmas (ICPs) provides a very high surface coverage, passivates well the nonradiative dangling bonds, and thereby favors the PL intensity. The average size of nc-Si QDs measured by HR-TEM appears consistent with similar estimates from Raman studies. The red shift of the Raman line and corresponding line broadening originates from the confinement of optical phonons within nc-Si QDs. Photoluminescence emerging from nc-Si/a-SiN(x):H quantum dots obtained from the low temperature and single-step plasma processing holds great promise for the fabrication of light-emitting devices and flexible flat panel displays. PMID:23407687

  18. DSC/TG-MS联用技术研究CL-20与NC-NG体系的相互作用%Research on the Interaction between CL-20 and NC-NG System via DSC/TG-MS

    Institute of Scientific and Technical Information of China (English)

    常海

    2007-01-01

    应用DSC/TG-MS联用新技术研究了CL-20与NC/NG双基混合体系的相互作用,在溶解制样条件下,NC/NG体系与CL-20不仅有物理相互作用,还有明显的化学相互作用,表现为:CL-20的存在,使得NG的升华过程和CL-20的分解过程显著提前,NC/NG体系的分解过程滞后;并研究了不同粒度的CL-20的热失重过程,表现为大颗粒CL-20热分解过程中有两次明显的热失重,小颗粒CL-20为一次热失重.

  19. Construction of Listeria monocytogenes ncRNA rli60 Gene Deletion Strain%单核细胞增生李斯特菌ncRNA rli60基因缺失株的构建研究

    Institute of Scientific and Technical Information of China (English)

    彭叶龙; 乔军; 孟庆玲; 谢堃; 赵海龙; 宋雪梅; 陈创夫

    2014-01-01

    为了构建单核细胞增生李斯特菌(Listeria monocytogenes,LM)ncRNA rli60基因缺失株,采用基因重叠延伸PCR (SOE-PCR)的方法成功构建具有氯霉素抗性的pKSV7-Δrli60穿梭质粒,然后电转化至LM-SB5感受态细胞中,在温度和氯霉素的双重选择压力下进行同源重组,通过PCR进行重组菌鉴定。结果表明:成功筛选得到遗传性稳定的LM ncRNA rli60基因缺失株,为揭示LM ncRNA rli60基因功能提供了研究材料;同时,为进一步研究其在LM致病性及环境应激中的分子机制奠定了基础。%To construct the ncRNA rli60 gene deletion strain of Listeria monocytogenes,the shuttle plasmid pKSV7-Δrli60 with chloramphenicol resistance was gained by overlap extension PCR successfully,which was electroporated into the LM-SB5 competent cell for homologous recombinant under the double pressure of temperature and chloramphenicol.Recombinant LM was identified by PCR.LM ncRNA rli60 gene deletion strain was successfully screened by PCR,which had stable genetic characteristic.This study provided materials for revealing the function of ncRNA rli60 gene and laid foundation for further study of the molecular mechanism in the LM pathogenicity and environmental stress.

  20. Measures to Improve NC Machining Quality%提高数控加工质量的措施

    Institute of Scientific and Technical Information of China (English)

    钱志英

    2013-01-01

    为高效地使用数控机床,提高数控加工质量,结合多年的教学和实践经验,论述了影响数控加工质量的因素,提出了提高加工质量的相关措施。%In order to use CNC machine tools efficiently and improve the quality of NC machining ,combining with years of experience of teaching and practice ,the author discussed the factors which affect the quality of NC machining ,and put forward some measures to improve the machining quality of NC machine tools .

  1. Structural and mechanical properties of nc-TiC/a-C:H nanocomposite film prepared by dual plasma technique

    International Nuclear Information System (INIS)

    Nanocomposite nc-TiC/a-C:H film, with an unusual combination of superhardness, high elastic modulus and high elastic recovery, are prepared by using the dual plasma technique. The effects of the filter coil current on the compositional, structural and mechanical properties of the nc-TiC/a-C:H films have been investigated. X-ray photoelectron spectroscopy (XPS) and Raman analyses show that deposition rate, composition and nanostructure of the nc-TiC/a-C:H films could be changed by varying the filter coil current. Fortunately, by selecting the proper value for the filter coil current, 2.5 A, one could remarkably enhance mechanical properties of films such as the superhardness (66.4 GPa), the high elastic modulus (510 GPa) and the high elastic recovery (83.3%)

  2. WCOBRA/TRAC-TF2 simulation of ROSA-IV/LSTF natural circulation test ST-NC-02

    International Nuclear Information System (INIS)

    The paper presents WCOBRA/TRAC-TF2 simulation results of the high-pressure (∼7 MPa) steady-state natural circulation test ST-NC-02 conducted at the ROSA-IV Large Scale Test Facility (LSTF). The simulations used a fairly detailed noding of the LSTF particularly in the vessel and the primary and secondary side of the steam generators. A single flow channel is used to model the primary side of the steam generator U-tubes. In general, the results are in good agreement with those observed in the ST-NC-02 test. (author)

  3. 数控机床产业强势增长%Robust growth of NC machine tool industry

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ The machine tool industry is an industry which provides production equipment for the equipment manufacturing industry, and the machine tool is the parent machine for equipment manufacturing, playing a key part in the industry.The equipment manufacturing industry, for example, the automobile industry, uses more than 60% of its fixed asset investment in the purchase of machine tools.The numerical control (NC)machine tool, as a mainstream product of the machine tool sector, has become a key piece of equipment for achieving modernisation of equipment manufacturing.It is the realistic requirement to speed up development of NC machine production for the development of China's equipment manufacturing industry.

  4. Review of the Development of NC Woodworking Machinery%数控木工机床发展综述

    Institute of Scientific and Technical Information of China (English)

    汪子卜; 朱兴微; 何盛; 卫佩行

    2012-01-01

      The development of NC technology in wood processing industry is stated, a five-axis NC machine to be developed is introduced and the development prospect of CN technology in the woodworking machinery field is analyzed.%  阐述了数控技术在木材加工行业的发展,介绍了目前亟待发展的五轴数控机床,分析了数控技术在木材加工机械领域的发展前景。

  5. CyNC: A method for real time analysis of systems with cyclic data flows

    DEFF Research Database (Denmark)

    Jessen, Jan Jacob; Schiøler, Henrik; Nielsen, Jens Frederik Dalsgaard;

    2006-01-01

    The paper addresses a novel method for performance analysis of distributed realtime systems with complex, and especially cyclic data flow graphs. The presented method is based on Network Calculus principles, where flow and service constraint functions are used to bound data flows and processing...... constraints implicitely given by a fix point equation in a space of constraint functions. In this paper a method denoted CyNC for obtaining a well defined solution to that problem is presented along with a theoretical justification of the method as well as comparative results for CyNC and alternative methods...

  6. INTERFERENCE-FREE TOOL POSTURE GENERATION FOR 5-AXIS NC MILLING FREE-FORM SURFACES WITH CYLINDRICAL MILL

    Institute of Scientific and Technical Information of China (English)

    Chen Liping; Chen Yan; Hu Dejin

    2004-01-01

    The 5-axis NC machining offers the potential of efficient and accurate machining. However, the present CAM system for 5-axis control is still an unsolved problem due to interference between tool and surrounding objects. A new method is presented. There are two steps in this procedure. First, it detects the interference by calculating the shortest distance between the tool-axis and the surrounding surfaces. Then upon the maximum gouging, the interference-free tool posture for 5-axis NC cylindrical milling free-form surfaces is obtained by adjusting tool. The validity of the proposed method has been confirmed by machining an impeller.

  7. Wholly smoothing cutter orientations for five-axis NC machining based on cutter contact point mesh

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Cutting forces with respect to different cutter orientations are analyzed for five-axis NC machining of a ball-end cutter.A measure is then defined to quantify the effects of cutter orientation variation.According to the measure,a novel model and algorithm are proposed to wholly optimize cutter orientations based on a cutter contact(CC) point mesh.The method has two advantages.One is that the cutter orientation smoothnesses along the feed direction and pick-feed direction are both wholly optimized.The other is that only the accessibility cones of mesh points are required to compute and the computation efficiency is improved.These advantages are shown by simulating the machining efficiency,the stability of feed velocities and the smoothness of cutting force.A computational example and a cutting experiment are finally given to illustrate the validity of the proposed method.

  8. Kinematic modelling of a 3-axis NC machine tool in linear and circular interpolation

    CERN Document Server

    Pessoles, Xavier; Rubio, Walter; 10.1007/s00170-009-2236-z

    2010-01-01

    Machining time is a major performance criterion when it comes to high-speed machining. CAM software can help in estimating that time for a given strategy. But in practice, CAM-programmed feed rates are rarely achieved, especially where complex surface finishing is concerned. This means that machining time forecasts are often more than one step removed from reality. The reason behind this is that CAM routines do not take either the dynamic performances of the machines or their specific machining tolerances into account. The present article seeks to improve simulation of high-speed NC machine dynamic behaviour and machining time prediction, offering two models. The first contributes through enhanced simulation of three-axis paths in linear and circular interpolation, taking high-speed machine accelerations and jerks into account. The second model allows transition passages between blocks to be integrated in the simulation by adding in a polynomial transition path that caters for the true machining environment t...

  9. Vector meson masses in two-dimensional SU(NC) lattice gauge theory with massive quarks

    Institute of Scientific and Technical Information of China (English)

    JIANG Jun-Qin

    2008-01-01

    Using an improved lattice Hamiltonian with massive Wilson quarks a variational method is applied to study the dependence of the vector meson mass Mv on the quark mass m and the Wilson parameter r in in the scaling window 1 ≤ 1/g2 ≤ 2, Mv/g is approximately linear in m, but Mv/g obviously does not depend on r (this differs from the quark condensate). Particularly for m → 0 our numerical results agree very well with Bhattacharya's analytical strong coupling result in the continuum, and the value of ((e)Mv/(e)m) |mm=0 in two-dimensional SU(NC) lattice gauge theory is very close to that in Schwinger model.

  10. Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima I reactor accident

    CERN Document Server

    MacMullin, S; Green, M P; Henning, R; Holmes, R; Vorren, K; Wilkerson, J F

    2011-01-01

    We present measurements of airborne fission products in Chapel Hill, NC, USA, from 62 days following the March 11, 2011, accident at the Fukushima I Nuclear Power Plant. Airborne particle samples were collected daily in air filters and radio-assayed with two high-purity germanium (HPGe) detectors. The fission products I-131 and Cs-137 were measured with maximum activities of 4.2 +/- 0.6 mBq/m^2 and 0.42 +/- 0.07 mBq/m^2 respectively. Additional activity from I-131, I-132, Cs-134, Cs-136, Cs-137 and Te-132 were measured in the same air filters using a low-background HPGe detector at the Kimballton Underground Research Facility (KURF).

  11. Compatibility of Quark and Resonant Picture Excited Baryon Multiplets in 1/N_c

    CERN Document Server

    Cohen, T D; Cohen, Thomas D.; Lebed, Richard F.

    2003-01-01

    We demonstrate that the two major complementary pictures of large N_c baryon resonances--as single-quark orbital excitations about a closed-shell core [giving SU(2N_F) x O(3) multiplets], and as resonances in meson-baryon scattering amplitudes--are completely compatible in a specific sense: Both pictures give rise to a set of multiplets of degenerate states, for which any complete spin-flavor multiplet within one picture fills the quantum numbers of complete multiplets in the other picture. This result is demonstrated by: (i) straightforward computation of the lowest multiplets in both pictures; (ii) a study of the nature of quark excitations in a hedgehog picture; (iii) direct group-theoretical comparison of the constraints in the two pictures.

  12. Negative parity baryons in the $1/N_c$ expansion: the three towers of states revisited

    CERN Document Server

    Matagne, N

    2012-01-01

    We discuss the compatibility between the quark-shell picture and the meson-nucleon scattering picture in large $N_c$ QCD for mixed symmetric $\\ell$ = 1 states previously analyzed by using a simple Hamiltonian including operators up to order $\\mathcal{O}(N^0_c)$ defined in the standard ground state symmetric core + excited quark procedure. Here we introduce a Hamiltonian of order $\\mathcal{O}(N^0_c)$ defined in a new approach where the separation of the system into two parts is not required. Three degenerate sets of states (towers) with the same quantum numbers as in the scattering picture and in the standard procedure are obtained. Thus the 0 is equally achieved. The eigenvalues of the presently chosen Hamiltonian also have simple analytic expressions, depending linearly on the three dynamical coefficients entering the Hamiltonian. This reinforces the validity of the new approach which had already 0 described excited negative parity baryons in a large energy range.

  13. Time-reversal-invariance-violating nucleon-nucleon potential in the 1/N_c expansion

    CERN Document Server

    Samart, Daris; Schindler, Matthias R; Phillips, Daniel R

    2016-01-01

    We apply the large-$N_c$ expansion to the time-reversal-invariance-violating (TV) nucleon-nucleon potential. The operator structures contributing to next-to-next-to-leading order in the large-$N_c$ counting are constructed. For the TV and parity-violating case we find a single operator structure at leading order. The TV but parity-conserving potential contains two leading-order terms, which however are suppressed by 1/$N_c$ compared to the parity-violating potential. Comparison with phenomenological potentials, including the chiral EFT potential in the TV parity-violating case, leads to large-$N_c$ scaling relations for TV meson-nucleon and nucleon-nucleon couplings.

  14. Sublimation of the Endohedral Fullerene Er3N@C80

    CERN Document Server

    Stibor, Alexander; Fortágh, József

    2009-01-01

    Evaporation studies of the endohedral metallofullerene ErN@C80 were performed via Knudsen effusion mass spectrometry. The macromolecule consists of a C80 fullerene cage which is stabilized by comprising a complex of three erbium atoms bounded to a nitrogen atom and has a mass of 1475 amu. The mass spectrum at a temperature of 1045 K and the relative intensities of the thermal fractions of Er3N@C80 are provided, proving its high stability. By measuring the quantity of evaporated molecules in thermal equilibrium through a quadrupole mass spectrometer in a temperature range between 782 K and 1128 K, the heat of sublimation was obtained from the second law method to be Hsub = 237 +-7$ kJ/mol.

  15. Quantitative multichannel NC-AFM data analysis of graphene growth on SiC(0001

    Directory of Open Access Journals (Sweden)

    Christian Held

    2012-02-01

    Full Text Available Noncontact atomic force microscopy provides access to several complementary signals, such as topography, damping, and contact potential. The traditional presentation of such data sets in adjacent figures or in colour-coded pseudo-three-dimensional plots gives only a qualitative impression. We introduce two-dimensional histograms for the representation of multichannel NC-AFM data sets in a quantitative fashion. Presentation and analysis are exemplified for topography and contact-potential data for graphene grown epitaxially on 6H-SiC(0001, as recorded by Kelvin probe force microscopy in ultrahigh vacuum. Sample preparations by thermal decomposition in ultrahigh vacuum and in an argon atmosphere are compared and the respective growth mechanisms discussed.

  16. {sup 99m}Tc-NC100668, a new tracer for imaging venous thromboemboli: pre-clinical biodistribution and incorporation into plasma clots in vivo and in vitro

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, David [Grove Centre, Research and Development, GE Healthcare Bio-Sciences, Little Chalfont (United Kingdom); Uppsala University Hospital, Institution of Oncology, Radiology and Clinical Immunology, Section of Radiology, Uppsala (Sweden); Lewis, Joanne; Battle, Mark; Lear, Rochelle; Farrar, Gill; Barnett, D.J.; Godden, Vanessa; Oliveira, Alexandra; Coombes, Catherine [Grove Centre, Research and Development, GE Healthcare Bio-Sciences, Little Chalfont (United Kingdom); Ahlstroem, Haakan [Uppsala University Hospital, Institution of Oncology, Radiology and Clinical Immunology, Section of Radiology, Uppsala (Sweden)

    2006-11-15

    {sup 99m}Tc-NC100668 is a new radiotracer being developed to aid the diagnosis of thromboembolism. The structure of NC100668 is similar to a region of human {alpha}{sub 2}-antiplasmin, which is a substrate for factor XIIIa (FXIIIa). The purpose of this study was to confirm the uptake of {sup 99m}Tc-NC100668 into forming plasma clot and to establish the biodistribution of {sup 99m}Tc-NC100668 in Wistar rats. The in vitro plasma clot uptake of {sup 99m}Tc-NC100668 and other compounds with known affinities to FXIIIa was measured using a plasma clot assay. The biodistribution and blood clot uptake of radioactivity of {sup 99m}Tc-NC100668 in normal Wistar rats and those bearing experimentally induced deep vein thrombi were investigated. The in vitro uptake of {sup 99m}Tc-NC100668 was greater than that for [{sup 14}C]dansyl cadaverine, a known substrate of FXIIIa in the plasma clot assay. The biodistribution of {sup 99m}Tc-NC100668 in male and female Wistar rats up to 24 h p.i. showed that radioactivity was rapidly excreted, predominantly into the urine, with very little background tissue retention. In vivo the uptake and retention of {sup 99m}Tc-NC100668 into the blood clot was greater than could be accounted for by non-specific accumulation of the radiotracer within the blood clot. {sup 99m}Tc-NC100668 was retained by plasma clots in vitro and blood clots in vivo. No significant tissue retention which could interfere with the ability to image thrombi in vivo was observed. This evidence suggests that {sup 99m}Tc-NC100668 might be useful in the detection of thromboembolism. (orig.)

  17. l585nc.m77t - MGD77 data file for Geophysical data from field activity L-5-85-NC in Northern California from 08/10/1985 to 08/31/1985

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry and magnetics data along with DGPS navigation data was collected as part of field activity L-5-85-NC in Northern California from 08/10/1985...

  18. l785nc.m77t - MGD77 data file for Geophysical data from field activity l-7-85-nc in Southern Pacific from 12/28/1983 to 01/03/1984

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with transit satellite navigation data was collected as part of field activity L-7-85-NC in Northern California from 09/23/1985 to...

  19. Machining by introducing CAD/CAM and CIM. Part 1. ; Integration of a shipbuilding CAD system and NC welding robots. CAD/CAM, CIM donyu ni tomonau kosakuho. ; Zosen CAD system to NC yosetsu robot no togo

    Energy Technology Data Exchange (ETDEWEB)

    Noborikawa, Y. (Hitachi Zosen Corp., Osaka (Japan))

    1993-09-25

    The integrated system of the shipbuilding CAD system and NC welding robots is outlined. The system is composed of the CAD/CAM interface and the CAM for distributed robots. In the former, the 3-D structure data such as overall size and name of members and the welding data such as geometry pattern data of weld lines designed by hull CAD system are output on the file with a data format acceptable by downstream CAM system for distributed welding robots. In the latter, the 3-D structure data is read from the adobe-mentioned output file, and the structure is represented on a display unit as wire frame model. The working range of the welding robot and the interference between a robot arm and members are checked, and the accurate NC data are thus prepared after correction of the robot working range due to unweldable weld lines. As the integrated system is applied to 14 portable NC robots, one female operator can handle 3-4 NC robots alone. 4 refs., 6 figs.

  20. f384nc.m77t - MGD77 data file for Geophysical data for field activity F-3-84-NC in Northern California from 06/15/1984 to 07/08/1984

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry and magnetics data along with DGPS navigation data was collected as part of field activity F-3-84-NC in Northern California from 06/15/1984...

  1. l1381nc.m77t - MGD77 data file for Geophysical data from field activity L-13-81-NC in Northern California from 10/09/1981 to 10/23/1981

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with DGPS navigation data was collected as part of field activity L-13-81-NC in Northern California from 10/09/1981 to 10/23/1981,...

  2. l685nc.m77t - MGD77 data file for Geophysical data from field activity L-6-85-NC in Northern California from 09/03/1985 to 09/20/1985

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry and magnetics data along with DGPS navigation data was collected as part of field activity L-6-85-NC in Northern California from 09/03/1985...

  3. l385nc.m77t - MGD77 data file for Geophysical data from field activity L-3-85-NC in Northern California from 07/15/1985 to 07/17/1985

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with DGPS navigation data was collected as part of field activity L-3-85-NC in Northern California from 07/15/1985 to 07/17/1985,...

  4. l182nc.m77t - MGD77 data file for Geophysical data from field activity L-1-82-NC in Northern California from 02/02/1982 to 02/03/1982

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry and magnetic data along with DGPS navigation data was collected as part of field activity L-1-82-NC in Northern California from 02/02/1982 to...

  5. l285nc.m77t - MGD77 data file for Geophysical data from field activity L-2-85-NC in Northern California from 04/03/1985 to 04/04/1985

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with DGPS navigation data was collected as part of field activity L-2-85-NC in Northern California from 04/03/1985 to 04/04/1985,...

  6. 33 CFR 334.410 - Albemarle Sound, Pamlico Sound, and adjacent waters, NC; danger zones for naval aircraft operations.

    Science.gov (United States)

    2010-07-01

    ..., and adjacent waters, NC; danger zones for naval aircraft operations. 334.410 Section 334.410 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE...; danger zones for naval aircraft operations. (a) Target areas—(1) North Landing River (Currituck...

  7. BARC 2009 Annual Report TO NC-1037: Genetic and functional genomic approaches to improve production and quality of pork

    Science.gov (United States)

    The NC-1037 project addresses “Genetic and functional genomic approaches to improve production and quality of pork.” It has 2 objectives: 1) Further understand the dynamic genetic mechanisms that influence production efficiency and quality of pork; and 2) Discover genetic mechanisms controlling anim...

  8. The Application of the GM (1,1) Metabolism Model to Error Data Processing of NC Machine Tools

    Institute of Scientific and Technical Information of China (English)

    LIAO De-gang; XIONG Xiao-hong

    2003-01-01

    This paper applied the gray system theory to error data processing of NC machine tools ac cording to the characteristic. It presented the gray metabolism model of error data processing. The test method for the model needs less capacity. Practice proved that the method is simple, calculation is easy, and results are exact.

  9. Novel Recombinant Protein FlaA N/C Protects against Radiation Injury via NF-κB Signaling.

    Science.gov (United States)

    Xu, Ying; Wu, Dongming; Fan, Yuanchun; Li, Peigeng; Du, Hongfei; Shi, Jiao; Wang, Dan; Zhou, Xiaoping

    2016-01-01

    There are few safe and effective drugs available that protect healthy tissue against radiation-induced damage, highlighting the need to develop such radioprotective agents. We investigated the mechanism underlying the protective effects of the novel, recombinant, flagellin-like protein FlaA N/C against radiation-induced tissue damage in female BALB/c mice. FlaA N/C treatment increased the levels of several pro-proliferative cytokines while inhibiting apoptosis and reducing inflammation. These effects were accompanied by activation of the nuclear factor κB signaling pathway via direct interaction of FlaA N/C with Toll-like receptor 5, as well as enhanced survival of mice after total-body irradiation compared to that observed with treatment with amifostine, a radioprotective agent that is currently being used in clinical practice. These results indicate that FlaA N/C could be further explored as a possible protector of damage to healthy tissue during radiotherapy. PMID:26789847

  10. 76 FR 39155 - R.J. Corman Railroad Property, LLC-Acquisition Exemption-NC Railroad, Inc

    Science.gov (United States)

    2011-07-05

    ... Register on April 9, 2010 (75 FR 18,253), and became effective on April 25, 2010. On May 28, 2010, RJC... Surface Transportation Board R.J. Corman Railroad Property, LLC--Acquisition Exemption--NC Railroad, Inc R. J. Corman Railroad Property, LLC (RJC Railroad Property), a Class III rail carrier, filed a...

  11. 75 FR 18253 - R.J. Corman Railroad Property, LLC-Acquisition Exemption-NC Railroad, Inc.

    Science.gov (United States)

    2010-04-09

    ... Surface Transportation Board R.J. Corman Railroad Property, LLC--Acquisition Exemption--NC Railroad, Inc. R.J. Corman Railroad Property, LLC (RJC Railroad Property), a Class III rail carrier, has filed a... concurrently filed notice of exemption in STB Finance Docket No. 35364, R.J. Corman Railroad...

  12. The Chlorella variabilis NC64A Genome Reveals Adaptation to Photosymbiosis, Coevolution with Viruses, and Cryptic Sex

    Energy Technology Data Exchange (ETDEWEB)

    Blanc, Guillaume; Duncan, Garry A.; Agarakova, Irina; Borodovsky, Mark; Gurnon, James; Kuo, Alan; Lindquist, Erika; Lucas, Susan; Pangailinan, Jasmyn; Polle, Juergen; Salamov, Asaf; Terry, Astrid; Yamada, Takashi; Dunigan, David D.; Grigoriev, Igor V.; Claverie, Jean-Michel; Etten, James L. Van

    2010-05-06

    Chlorella variabilis NC64A, a unicellular photosynthetic green alga (Trebouxiophyceae), is an intracellular photobiont of Paramecium bursaria and a model system for studying virus/algal interactions. We sequenced its 46-Mb nuclear genome, revealing an expansion of protein families that could have participated in adaptation to symbiosis. NC64A exhibits variations in GC content across its genome that correlate with global expression level, average intron size, and codon usage bias. Although Chlorella species have been assumed to be asexual and nonmotile, the NC64A genome encodes all the known meiosis-specific proteins and a subset of proteins found in flagella. We hypothesize that Chlorella might have retained a flagella-derived structure that could be involved in sexual reproduction. Furthermore, a survey of phytohormone pathways in chlorophyte algae identified algal orthologs of Arabidopsis thaliana genes involved in hormone biosynthesis and signaling, suggesting that these functions were established prior to the evolution of land plants. We show that the ability of Chlorella to produce chitinous cell walls likely resulted from the capture of metabolic genes by horizontal gene transfer from algal viruses, prokaryotes, or fungi. Analysis of the NC64A genome substantially advances our understanding of the green lineage evolution, including the genomic interplay with viruses and symbiosis between eukaryotes.

  13. 40 CFR 721.642 - Amines, N-(C14-18 and C16-16 unsaturated alkyl)] dipropylene-tri-, tripropylenetetra-, and...

    Science.gov (United States)

    2010-07-01

    ... unsaturated alkyl)] dipropylene-tri-, tripropylenetetra-, and tetrapropylenepenta-. 721.642 Section 721.642... Amines, N-(C14-18 and C16-16 unsaturated alkyl)] dipropylene-tri-, tripropylenetetra-, and... substances amines, N-(C14-18 and C16-18 unsaturated alkyl)] dipropylenetri-, (PMN...

  14. Skill for machining worm screw with NC lathe%数控车床上蜗杆的加工技巧

    Institute of Scientific and Technical Information of China (English)

    赵健

    2001-01-01

    介绍了一种在数控车床上加工大螺距蜗杆的切削技巧以及相应的数控程序。%The machining skill and relevant NC program of machining worm screw with large pitch using a NC lathe are introduced.

  15. RNAspa: a shortest path approach for comparative prediction of the secondary structure of ncRNA molecules

    Directory of Open Access Journals (Sweden)

    Michaeli Shulamit

    2007-10-01

    Full Text Available Abstract Background In recent years, RNA molecules that are not translated into proteins (ncRNAs have drawn a great deal of attention, as they were shown to be involved in many cellular functions. One of the most important computational problems regarding ncRNA is to predict the secondary structure of a molecule from its sequence. In particular, we attempted to predict the secondary structure for a set of unaligned ncRNA molecules that are taken from the same family, and thus presumably have a similar structure. Results We developed the RNAspa program, which comparatively predicts the secondary structure for a set of ncRNA molecules in linear time in the number of molecules. We observed that in a list of several hundred suboptimal minimal free energy (MFE predictions, as provided by the RNAsubopt program of the Vienna package, it is likely that at least one suggested structure would be similar to the true, correct one. The suboptimal solutions of each molecule are represented as a layer of vertices in a graph. The shortest path in this graph is the basis for structural predictions for the molecule. We also show that RNA secondary structures can be compared very rapidly by a simple string Edit-Distance algorithm with a minimal loss of accuracy. We show that this approach allows us to more deeply explore the suboptimal structure space. Conclusion The algorithm was tested on three datasets which include several ncRNA families taken from the Rfam database. These datasets allowed for comparison of the algorithm with other methods. In these tests, RNAspa performed better than four other programs.

  16. Oral administration of royal jelly inhibits the development of atopic dermatitis-like skin lesions in NC/Nga mice.

    Science.gov (United States)

    Taniguchi, Yoshifumi; Kohno, Keizo; Inoue, Shin-ichiro; Koya-Miyata, Satomi; Okamoto, Iwao; Arai, Norie; Iwaki, Kanso; Ikeda, Masao; Kurimoto, Masashi

    2003-09-01

    We have shown previously that in addition to IL-4, IL-5 and IL-10, antigen-specific interferon-gamma (IFN-gamma) production by spleen cells from ovalbumin (OVA)/Alum-immunized mice is inhibited by the administration of royal jelly (RJ). Since it has been shown that both Th1 and Th2 cytokines play pathogenic roles in the generation of atopic dermatitis (AD), we have examined whether RJ suppresses the development of AD-like skin lesions in NC/Nga mice induced by repeated application of picryl chloride (PiCl) under specific pathogen-free (SPF) conditions. Oral administration of RJ to the PiCl-treated NC/Nga mice inhibited the development of AD-like skin lesions in these mice as exemplified by the significant decrease in the total skin severity scores and the decrease in hypertrophy, hyperkeratosis, and infiltration of the epidermis and corium by inflammatory cells. IFN-gamma production by spleen cells from PiCl-treated NC/Nga mice in response to TNP-KLH was partially but significantly inhibited by the oral administration of RJ, while IFN-gamma production by Con A-stimulated spleen cells was not affected. Since inducible nitric oxide (NO) synthase (iNOS)-derived NO has been suggested as an important immunoregulatory mediator in inflammatory autoimmune diseases, we have also examined the expression of iNOS in the dorsal skin lesions of PiCl-treated NC/Nga mice. Interestingly, the expression of iNOS was significantly increased in the skin lesions of RJ-administered mice compared with those of control PBS-administered mice. Thus, our results suggest that RJ suppresses the development of AD-like skin lesions in PiCl-treated NC/Nga mice, possibly by a combination of down-regulating TNP-specific IFN-gamma production and up-regulating iNOS expression. PMID:12890429

  17. j281nc.m77t and j281nc.h77t: MGD77T data and header files for single-beam bathymetry data for field activity J-2-81-NC in Carmel Bay, Monterey Bay, Northern California from 06/23/1981 to 06/30/1981

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with miniranger navigation data was collected as part of the U.S. Geological Survey cruise J-2-81-NC. The cruise was conducted in...

  18. l486nc.m77t and l486nc.h77t: MGD77T data and header files for single-beam bathymetry data for field activity L-4-86-NC in Northern California from 08/21/1986 to 09/05/1986

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with Loran-C RHO-RHO and GPS navigation data was collected as part of the U.S. Geological Survey cruise L-4-86-NC. The cruise was...

  19. c179nc.m77t and c179nc.h77t: MGD77T data and header file for single-beam bathymetry data for field activity C-1-79-NC in Northern California from 05/01/1979 to 05/02/1979

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with miniranger navigation data was collected as part of the U.S. Geological Survey cruise C-1-79-NC. The cruise was conducted in...

  20. f890nc.m77t and f890nc.h77t: MGD77T data and header files for single-beam bathymetry data for field activity F-8-90-NC in Gulf of Farallones, Northern California from 08/05/1990 to 08/17/1990

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with Loran-C RHO-RHO and GPS navigation data was collected as part of the U.S. Geological Survey cruise F-8-90-NC. The cruise was...

  1. f790nc.m77t and f790nc.h77t: MGD77T data and header files for single-beam bathymetry data for field activity F-7-90-NC in the Gulf of Farallones, Northern California from 07/19/1990 to 08/03/1990

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with Loran-C RHO-RHO and GPS navigation data was collected as part of the U.S. Geological Survey cruise F-7-90-NC. The cruise was...

  2. 硝化棉气凝胶的微结构及热分解特性%Microstructure and Thermal Behavior of NC Aerogel

    Institute of Scientific and Technical Information of China (English)

    于宪峰; 晋苗苗

    2014-01-01

    为研究硝化棉( NC)气凝胶的微结构及其与热性能的关系,用溶胶-凝胶法以及超临界干燥法制备了硝化棉气凝胶。用扫描电子显微镜( SEM)、X射线衍射( XRD)、热重-红外联用( TG-FTIR)表征了其微观结构、结晶性及热性能。结果表明:NC 气凝胶的微观结构为纳米颗粒堆积成的纳米多孔结构。其结晶遭到破坏,呈非晶无序特征。与 NC 相比,NC 气凝胶的 DTG 峰温及 DSC放热峰温度分别提前7℃和11℃,分解热由1429.87 J·g-1提高至1689.21 J·g-1。%To study the microstructure of nitrocellulose( NC)aerogel and its relationship with thermal properties,NC aerogel was prepared by sol-gel method and supercritical drying. The microstructure,crystallizability and thermal properties of the aerogel were characterized by SEM,XRD and TG/DSC-FTIR methods. Results show that:the microstructure of NC aerogel is nano-porous structure accumulated by nano-particles. The crystallization of NC is destroyed in NC aerogel,presenting amorphous disordered state. In comparison with NC,the DTG peak temperature and DSC exothermic peak temperature of NC aerogel shift 7 ℃ and 12 ℃ downwards,respectively,and the decomposition heat increases from 1429.87 J·g-1 to 1689.21 J·g-1.

  3. A Numerical Simulation of the Effect of Buffer Layer Band Gap on the Performances of nc-Si : H Based Solar Cells

    Directory of Open Access Journals (Sweden)

    H. Touati

    2016-06-01

    Full Text Available This paper describes an investigation, by using numerical simulation, into the impacts of i-nc-Si : H buffer layer band gap on the photovoltaic parameters of n-i-p hydrogenated nanocrystalline silicon (nc-Si : H solar cells. The output external cell parameters, like, the short-circuit current (JSC, the open circuit voltage (VOC, the fill factor (FF and efficiency (Eff are simulated by varying the mobility band gap (Eg of i-nc-Si : H buffer layer. Also, the band diagram of nc-Si : H n-i-p solar cell, the electric field and the traped hole density at i/p interface, and the external quantum efficiency, with different values of buffer layer band gap where optimized. The simulation result shows that in valence band and for both interfaces, the band offsets ΔEV1 at p-nc-Si : H (window layer / i-nc-Si : H (buffer layer and ΔEV2 at i-nc-Si : H (buffer layer / i-nc-Si : H (absorber layer can be affected by varying Eg. It is obtained that the values efficiency are 10.89 % and 11.33 % when the value of i-nc-Si : H buffer layer band gap are 1.4 eV and 1.55 eV, respectively. However, the i-nc-Si : H buffer layer band gap of 1.55 eV was optimized for obtaining a better efficiency for n-i-p solar cell based on hydrogenated nanocrystalline silicon.

  4. Progress in the domain of emissions tracking and environment radioactivity monitoring - Proceedings of the technical days organised by the SFRP Environment Section

    International Nuclear Information System (INIS)

    The Environment Section of the French Society of Radiation Protection (SFRP) organized a technical meeting on the progress made in the domain of emissions tracking and environment radioactivity monitoring. This document brings together the abstracts and the presentations (slides) of the different talks given at the meeting: 1 - Environment monitoring at the global, national and local scale: historical overview (Dominique CALMET, CEA); 2 - Evolution of radioactivity monitoring in the environment from 1960 to the present day (Guillaume MANIFICAT, IRSN); 3 - Euratom's legal framework (Zhana GENOVA, CTE); 4 - Main regulatory changes during the last decade (Nathalie REYNAL, ASN); 5 - Progress of standardization works on radioactive effluent emissions control and environment monitoring (Philippe BEGUINEL, BNEN); 6 - From operators' self-monitoring to ASN's inspections: a many components control system (Eric LE COZ, ASN); 7 - Control of effluents and emissions management at CEA Centres (Marianne CALVEZ, CEA); 8 - Liquid and gaseous effluents of ITER experimental facility: description and impacts (Pierre CORTES, IO); 9 - Effluents and emissions management strategy at AREVA NC La Hague facility (Stephane PUYDARRIEUX, AREVA); 10 - Radioactive effluents from nuclear facilities ongoing deconstruction: from dimensioning to real effluents (Benoit CLAVEL, EDF); 11 - Radionuclides decontamination process for liquid effluents using micro-algae at the laboratory scale (Corinne RIVASSEAU, CEA); 12 - Radioactive effluents from nuclear medicine services: management, monitoring and impact measurement methods (Nathalie TCHILIAN, ASN); 13 - Evolution history of effluents management and environment monitoring at the Solvay La Rochelle site (Thierry DELLOYE, SOLVAY); 14 - Different international approaches in effluents management and monitoring: example of French and German gaseous effluents - regulation, analyses, accounting rules (Jean-Jacques DIANA, ASN); 15 - Environment

  5. Hydrodynamics in New River Inlet, NC - a Numerical Investigation using NearCoM-TVD

    Science.gov (United States)

    Chen, J.; Hsu, T.; Shi, F.; Elgar, S.; Raubenheimer, B.

    2012-12-01

    A multi-institutional, observational and numerical modeling study of hydrodynamics and sediment transport at New River Inlet, NC was carried out during May 2012. Here, we report a numerical investigation using NearCoM-TVD, a quasi-3D circulation model coupled with the wave module SWAN in a curvilinear mesh, with emphasis on the interactions between tidal currents, complex bathymetry, and waves in the inlet-bay-beach system. Preliminary simulations suggest modeled current speeds in the inlet are sensitive to bottom friction. Hence, the model is calibrated and validated with currents observed during both calm and energetic conditions. The model reproduces the observed, spatially variable, circulation patterns and flow magnitudes throughout the inlet area, which includes a recently dredged 2-m deep, 30-m wide navigation channel. The simulations suggest that waves play an important role in the vortex generation and affect landward-directed currents near the north and south sides of the inlet entrance. Simulations in an idealized domain without the complex ebb shoal are used to investigate the cause of these wave-induced flow features in the presence of tidal-driven circulation, wave-induced set-up, undertow, and an alongshore current. Simulations with and without wave and tidal forcing are compared with each other, and the relevant physical quantities are expressed in terms of non-dimensional parameters so the results can be applied to other tidal inlet systems. Supported by ONR and NSSEFF.

  6. NC Material Management Module Development%NC系统物料管理模块开发

    Institute of Scientific and Technical Information of China (English)

    梁卫东

    2012-01-01

    介绍如何系统化地进行有线电视的物料管理,并通过对NC供应链系统物料管理模块的开发,利用财务结算的材料费用和仓库管理的材料数量,应用到规划建设的物料管理上,从而实现有线电视工程预算与财务结算数据的对接,更有效地把控工程材料用量,提高了工程物料管理工作的效率。%This paper introduces how to systematically cable material management, and through the NC supply chain system material management module development, the financial settlement of material cost and ware- house management quantity of material, applied to the planning and construction material management. In or- der to achieve CATV project budget and financial settlement data docking, more effectively to control the engi- neering material, for complicated engineering materials management to improve efficiency.

  7. Before and After How has the SNO NC measurement changed things?

    CERN Document Server

    Bahcall, J N; Peña-Garay, C; Bahcall, John N.; Peña-Garay, Carlos

    2002-01-01

    We present "Before and After" global oscillation solutions, as well as predicted "Before and After" values and ranges for eight future solar neutrino observables. The ``Before'' case includes all solar neutrino data (and some theoretical improvements) available prior to April 20, 2002 and the ``After'' case includes, in addition, the new SNO data on the CC, NC, and day-night asymmetry. The LMA solution is the only currently allowed MSW oscillation solution at a CL of 98.8 %. The LOW solution is allowed only at 2.5 sigma, SMA at 3.7 sigma, and pure sterile oscillations at 5.4 sigma. Small mixing angles are ``out''(pure sterile is ``way out''); MSW with large mixing angles is definitely ``in''. Vacuum oscillations are allowed, but not robustly, at 2.1 sigma. Precise maximal mixing is excluded at 3.2 sigma for MSW solutions and at 2.8 sigma for vacuum solutions. Most of the predicted values for future observables for the BOREXINO, KamLAND, and future SNO measurements are changed only by minor amounts by the incl...

  8. Forging Hispanic communities in new destinations: A case study of Durham, NC.

    Science.gov (United States)

    Flippen, Chenoa A; Parrado, Emilio A

    2012-03-01

    The Chicago School of urban sociology and its extension in the spatial assimilation model have provided the dominant framework for understanding the interplay between immigrant social and spatial mobility. However, the main tenets of the theory were derived from the experience of pre-war, centralized cities; scholars falling under the umbrella of the Los Angeles school have recently challenged the extent to which they are applicable to the contemporary urban form, which is characterized by sprawling, decentralized, and multi-nucleated development. Indeed, new immigrant destinations, such as those scattered throughout the American Southeast, are both decentralized and lack prior experience with large scale immigration. Informed by this debate this paper traces the formation and early evolution of Hispanic neighborhoods in Durham, NC, a new immigrant destination. Using qualitative data we construct a social history of immigrant neighborhoods and apply survey and census information to examine the spatial pattern of neighborhood succession. We also model the sorting of immigrants across neighborhoods according to personal characteristics. Despite the many differences in urban form and experience with immigration, the main processes forging the early development of Hispanic neighborhoods in Durham are remarkably consistent with the spatial expectations from the Chicago School, though the sorting of immigrants across neighborhoods is more closely connected to family dynamics and political economy considerations than purely human capital attributes. PMID:24482612

  9. A rational approach to resonance saturation in large-Nc QCD

    International Nuclear Information System (INIS)

    We point out that resonance saturation in QCD can be understood in the large-Nc limit from the mathematical theory of Pade Approximants to meromorphic functions. These approximants are rational functions which encompass any saturation with a finite number of resonances as a particular example, explaining several results which have appeared in the literature. We review the main properties of Pade Approximants with the help of a toy model for the (VV-AA) two-point correlator, paying particular attention to the relationship among the Chiral Expansion, the Operator Product Expansion and the resonance spectrum. In passing, we also comment on an old proposal made by Migdal in 1977 which has recently attracted much attention in the context of AdS/QCD models. Finally, we apply the simplest Pade Approximant to the (VV-AA) correlator in the real case of QCD. The general conclusion is that a rational approximant may reliably describe a Green's function in the Euclidean, but the same is not true in the Minkowski regime due to the appearance of unphysical poles and/or residues

  10. Renormalization of local quark-bilinear operators for Nf=3 flavors of SLiNC fermions

    CERN Document Server

    Constantinou, M; Panagopoulos, H; Perlt, H; Rakow, P E L; Schierholz, G; Schiller, A; Zanotti, J M

    2014-01-01

    The renormalization factors of local quark-bilinear operators are computed non-perturbatively for $N_f=3$ flavors of SLiNC fermions, with emphasis on the various procedures for the chiral and continuum extrapolations. The simulations are performed at a lattice spacing $a=0.074$ fm, and for five values of the pion mass in the range of 290-465 MeV, allowing a safe and stable chiral extrapolation. Emphasis is given in the subtraction of the well-known pion pole which affects the renormalization factor of the pseudoscalar current. We also compute the inverse propagator and the Green's functions of the local bilinears to one loop in perturbation theory. We investigate lattice artifacts by computing them perturbatively to second order as well as to all orders in the lattice spacing. The renormalization conditions are defined in the RI$'$-MOM scheme, for both the perturbative and non-perturbative results. The renormalization factors, obtained at different values of the renormalization scale, are translated to the ${...

  11. Effect of nitrogen dioxide on the EPR property of lithium octa-n-butoxy 2,3-naphthalocyanine (LiNc-BuO) microcrystals.

    Science.gov (United States)

    Pandian, Ramasamy P; Dang, Vinh; Manoharan, Periakaruppan T; Zweier, Jay L; Kuppusamy, Periannan

    2006-07-01

    Lithium octa-n-butoxy-naphthalocyanine (LiNc-BuO) is a stable free radical that can be detected by electron paramagnetic resonance (EPR) spectroscopy. Previously we have reported that microcrystals of LiNc-BuO exhibit a single sharp EPR peak, whose width varies linearly with the partial pressure of paramagnetic molecules such as oxygen and nitric oxide. In this report, we present the effect of nitrogen dioxide (NO2), which is also a paramagnetic molecule, on the EPR properties of LiNc-BuO. The gas-sensing property of LiNc-BuO is attributed to the open molecular framework of the crystal structure which is arranged with wide channels capable of accommodating large molecules such as NO2. The EPR linewidth of LiNc-BuO was highly sensitive to the partial pressure of NO2 in the gas mixture. The line-broadening was quick and reversible in the short-term for low concentration of NO2. However, the EPR signal intensity decreased with time of exposure, apparently due to a reaction of NO2 with LiNc-BuO crystals to give diamagnetic products. The results suggested that LiNc-BuO may be a useful probe for the determination of trace amounts of NO2 using EPR spectroscopy. PMID:16690337

  12. 基于FANUC数控系统前馈控制提高数控机床控制精度的研究%Research on Machining Precision of NC Machine Based on Feedforward of FANUC NC System

    Institute of Scientific and Technical Information of China (English)

    朱仕学

    2011-01-01

    常规的数控伺服系统的指令滞后问题导致加工指令轨迹同实际轨迹存在形状误差.通过理论计算和实际应用认为:在数控伺服系统中引进前馈控制(即把前馈控制器置于系统的输入端)方法是消除这种不稳定和精度误差最有效的方法.阐述了伺服系统前馈控制技术的设计原理和具体方法.%The routine log of NC servo system' s instruction will cause the form error of the machining instruction to real machining trajectory. The author considers that using feed forward of NC servo system can effectively solve the problem and raise machining precision. The article expounds the design principle and method of how to use NC servo system feed forward.

  13. Detachment of fullerene nC60 nanoparticles in saturated porous media under flow/stop-flow conditions: Column experiments and mechanistic explanations.

    Science.gov (United States)

    Wang, Zhan; Wang, Dengjun; Li, Baoguo; Wang, Jizhong; Li, Tiantian; Zhang, Mengjia; Huang, Yuanfang; Shen, Chongyang

    2016-06-01

    This study was aimed at investigating the detachment of fullerene nC60 nanoparticles (NPs) in saturated sand porous media under transient and static conditions. The nC60 NPs were first attached at primary minima of Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction energy profiles in electrolyte solutions with different ionic strengths (ISs). The columns were then eluted with deionized water to initiate nC60 NP detachment by decreasing solution IS. Finally, the flow of the columns was periodically interrupted to investigate nC60 NP detachment under static condition. Our results show that the detachment of nC60 NPs occurred under both transient and static conditions. The detachment under transient conditions was attributed to the fact that the attractions acting on the nC60 NPs at primary minima were weakened by nanoscale physical heterogeneities and overcome by hydrodynamic drags at lower ISs. However, a fraction of nC60 NPs remained at shallow primary minima in low flow regions, and detached via Brownian diffusion during flow interruptions. Greater detachment of nC60 NPs occurred under both transient and static conditions if the NPs were initially retained in electrolyte solutions with lower valent cations due to lower attractions between the NPs and collectors. Decrease in collector surface chemical heterogeneities and addition of dissolved organic matter also increased the extent of detachment by increasing electrostatic and steric repulsions, respectively. While particle attachment in and subsequent detachment from secondary minima occur in the same electrolyte solution, our results indicate that perturbation in solution chemistry is necessary to lower the primary minimum depths to initiate spontaneous detachment from the primary minima. These findings have important implications for predicting the fate and transport of nC60 NPs in subsurface environments during multiple rainfall events and accordingly for accurately assessing their environmental risks. PMID

  14. PREFACE: NC-AFM 2004: Proceedings of the 7th International Conference on Non-contact Atomic Force Microscopy

    Science.gov (United States)

    Schwarz, Udo

    2005-03-01

    With the ongoing miniaturization of devices and controlled nanostructuring of materials, the importance of atomic-scale information on surfaces and surface properties is growing continuously. The astonishing progress in nanoscience and nanotechnology that took place during the last two decades was in many ways related to recent progress in high-resolution imaging techniques such as scanning tunnelling microscopy and transmission electron microscopy. Since the mid-1990s, non-contact atomic force microscopy (NC-AFM) performed in ultrahigh vacuum has evolved as an alternative technique that achieves atomic resolution, but without the restriction to conducting surfaces of the previously established techniques. Advances of the rapidly developing field of NC-AFM are discussed at annual conferences as part of a series that started in 1998 in Osaka, Japan. This special issue of Nanotechnology is a compilation of original work presented at the 7th International Conference on Non-contact Atomic Force Microscopy that took place in Seattle, USA, 12-15 September 2004. Over the years, the conference grew in size and scope. Atomic resolution imaging of oxides and semiconductors remains an issue. Noticeable new developments have been presented in this regard such as, e.g., the demonstrated ability to manipulate individual atoms. Additionally, the investigation of individual molecules, clusters, and organic materials gains more and more attention. In this context, considerable effort is undertaken to transfer the NC-AFM principle based on frequency modulation to applications in air and liquids with the goal of enabling high-resolution surface studies of biological material in native environments, as well as to reduce the experimental complexity, which so far involves the availability of (costly) vacuum systems. Force spectroscopy methods continue to be improved and are applied to topics such as the imaging of the three-dimensional force field as a function of the distance with

  15. Oxygen partial pressure dependence of memory effect of sputtered nc-Al/α-Al2O3 thin films

    International Nuclear Information System (INIS)

    Nanocrystalline aluminum embedded in amorphous dielectric alumina matrix thin films (nc-Al/α-Al2O3) was synthesized via reactive magnetron sputtering. The nc-Al/α-Al2O3 films at different oxygen partial pressures were sputtered on p-type Si substrates from a pure Al target in the mixed ambient of Ar and O2. Both deposition rate and aluminum concentration increase as the oxygen partial pressure decreases. X-ray photoelectron spectroscopy and high-resolution transmission electron microscope studies give the confirmation of nanocrystalline Al embedded in amorphous Al2O3 matrix. This nanocomposite thin film exhibits memory effect as a result of charge trapping. The flat band voltage value depends on the Al nanocrystal concentration which is related to oxygen partial pressure

  16. The antioxidative defense system is involved in the premature senescence in transgenic tobacco (Nicotiana tabacum NC89)

    OpenAIRE

    Liu, Yu; Wang, Lu; Liu, Heng; Zhao, Rongrong; Liu, Bin; Fu, Quanjuan; Zhang, Yuanhu

    2016-01-01

    Background α-Farnesene is a volatile sesquiterpene synthesized by the plant mevalonate (MVA) pathway through the action of α-farnesene synthase. The α-farnesene synthase 1 (MdAFS1) gene was isolated from apple peel (var. white winter pearmain), and transformed into tobacco (Nicotiana tabacum NC89). The transgenic plants had faster stem elongation during vegetative growth and earlier flowering than wild type (WT). Our studies focused on the transgenic tobacco phenotype. Results The levels of c...

  17. Angelicae Dahuricae Radix Inhibits Dust Mite Extract-Induced Atopic Dermatitis-Like Skin Lesions in NC/Nga Mice

    Directory of Open Access Journals (Sweden)

    Hoyoung Lee

    2012-01-01

    Full Text Available We examined whether Angelicae Dahuricae Radix (AR suppresses the development of atopic dermatitis (AD-like skin lesions induced by Dermatophagoides farinae in NC/Nga mice. To investigate the effect of AR, we measured the AD severity score, measured plasma levels of IgE and histamine, and performed histological analysis in NC/Nga mice. We also confirmed the anti-inflammatory effects of AR by measuring TARC/CCL17 production from LPS-treated RAW 264.7 cells and mRNA levels of TARC and MDC/CCL22 in TNF-α/IFN-γ-treated HaCaT cells. 10 mg/day of AR extract was applied for 4 weeks to NC/Nga mice. Both the AR extract and 0.1% tacrolimus suppressed the development of AD-like skin lesions and reduced dermatitis scores of the back and ear skin. AR extracts caused an inhibition of histological changes induced by repeated application of D. farinae and a reduction of IgE and histamine levels in plasma (P<0.05. Furthermore, NO production in LPS-treated RAW 264.7 cells was diminished in a dose-dependent manner, and hTARC production and TARC and MDC mRNA levels in TNF-α/IFN-γ-treated HaCaT cells were diminished by AR. The inhibitory effect of AR on NO, TARC and MDC production may be associated with the suppression of AD-like skin lesions in D. farinae-induced NC/Nga mice.

  18. NC Lathe Training System Based on the Web%基于Web的数控机床培训系统

    Institute of Scientific and Technical Information of China (English)

    卢碧红; 黄文丽; 葛研军

    2004-01-01

    Based on an analysis of the requirement of network-oriented NC lathe training system, a general framework of web-based training system is established. The key techniques for establishing this system include a three-layer web structure in building the general framework, the technique of VRML to model a virtual operating environment, and the access to the database using the ASP technique.

  19. A Study on 3D FE Simulation Method of NC Bending Process of Thin-walled Tube

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The numerical control (NC) precision bending process of thin-walled tube is on e of advanced plastic forming processes with high efficiency, forming precision, strength/weight ratio and low cost, thus it is playing more and more important role in manufacturing parts in aerospace and automobile industries. However, the determination of parameters crucial to make sure tube parts qualified is heavil y experience-based and involves repeated trial-and-errors in practice, which makes the production efficiency...

  20. Λc(2595 ) resonance as a dynamically generated state: The compositeness condition and the large Nc evolution

    Science.gov (United States)

    Lu, Jun-Xu; Chen, Hua-Xing; Guo, Zhi-Hui; Nieves, J.; Xie, Ju-Jun; Geng, Li-Sheng

    2016-06-01

    Recent studies have shown that the well-established Λc(2595 ) resonance contains a large meson-baryon component, which can vary depending on the specific formalism. In this work, we examine such a picture by utilizing the compositeness condition and the large number of colors (Nc) expansion. We examine three different models fulfilling two body unitarity in coupled-channels, and adopting renormalization schemes where the mass of the Λc(2595 ) resonance is well described, but not necessarily its width, since we do not consider three body channels and work at the isospin symmetric limit. Both approximations might have an effect larger on the width than on the mass. In this context, our studies show that the compositeness of the Λc(2595 ) depends on the number of considered coupled channels, and on the particular regularization scheme adopted in the unitary approaches and, therefore, is model dependent. In addition, we perform an exploratory study of the Λc(2595 ) in the large Nc expansion, within a scheme involving only the π Σc and K Ξc' channels, whose dynamics is mostly fixed by chiral symmetry. In this context and formulating the leading-order interaction as a function of Nc, we show that for moderate Nc>3 values, the mass and width of the Λc(2595 ) deviate from those of a genuine q q q baryon, implying the relevance of meson-baryon components in its wave function. Furthermore, we study the properties of the Λc(2595 ), in the strict Nc→∞ limit, using an extension of the chiral Weinberg-Tomozawa interaction to an arbitrary number of flavors and colors. This latter study hints at the possible existence of a (perhaps) subdominant q q q component in the Λc(2595 ) resonance wave function, which would become dominant when the number of colors gets sufficiently large.