Download or read book Study of Safety Relief Valve Operation Under ATWS Conditions written by E. S. Hutmacher and published by . This book was released on 1979 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Safety Relief Valve Operation Under ATWS Conditions Super Critical Flow written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In March 1979, ETEC published as ETEC-TDR-78-19 a search which updated earlier NRC studies of saturated or subcooled water flow through relief valves, under ATWS conditions. This Supplement expands upon that search to include supercritical steam-water flow. No applicable data for the supercritical conditions was found, nor were any newer data on saturated or subcooled conditions uncovered. The Supplement also updated a look for facilities currently capable of simultaneously imposing all ATWS conditions upon test relief valves. Results confirmed the negative findings of ETEC-TDR-78.19.
Download or read book Study of Safety Relief Valve Operation Under ATWS Conditions written by E. S. Hutmacher and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical and Experimental Investigations on Critical Multiphase Flows in Safety Relief Valves and Nozzles written by Moftah Salem Moftah Alshaikh and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-phase gas/liquid critical flows are in general complex due to the existence of mass, momentum and heat transfer between phases. In this study these processes have been investigated in a safety relief valve where the complex geometry introduces multiple choking points, shock waves, rapid accelerations involving rapid state changes of velocity, pressure and temperature and flow regime changes. These effects influence to a different degree the valve mass flowrate and the forces acting on the valve and thus the rating and dynamic response when in operation. At present no predictive tools are available for design evaluation of safety valves operating under two phase conditions. In this thesis the ability of the standard two fluid model to predict such processes is investigated.Two fluid (Euler-Euler) multi-dimensional modelling approaches with a mixture k-Ɛ turbulence model to predict such conditions are investigated. The study has been divided into two stages: firstly, for fixed mass fraction conditions air-water two phase critical flows through a conventional spring loaded safety relief valve commonly used in the refrigeration industry have been carried out experimentally and computationally. Secondly, to extend the study to thermal non equilibrium conditions investigations of steam-water two phase flows through a converging-diverging nozzle have been performed computationally. In the first stage, experiments have been carried out for a range of pressures (4.8 - 13.8 bar), a wide range of water fractions (0 - 0.89) and for various different opening positions of the valve disc. Quasi steady flow has been assumed appropriate and valve flow-lift and force-lift characteristics have been obtained, which determine the capacity of the valve to control pressure, the sizing of the spring and the dynamics of the valve during operation. Comparison with the simplified homogenous mixture model will show that this model tends to underestimate mass flowrates for medium to high liquid mass fraction. Force and flow scaling parameters have been explored for use in valve design under various multiphase flow conditions. In the second stage, for thermal non equilibrium conditions the numerical calculations have been made for a range of pressures (1.34 - 1.89 bar), a range of water mass fractions (0 - 0.36). The computational predictions of mass flowrate compare well with experimental data from the literature. In general, the two fluid model can adequately account for mechanical non equilibrium for these complex flow conditions with the use of simplified droplet sizing rules. Thus the CFD Euler-Euler model predictions have been found in good agreement with the experimental data. For thermal non equilibrium where phase changes dominate less progress was achieved and further investigated required.
Download or read book NUREG CR written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer Fluid Flow Digest written by and published by . This book was released on 1980 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1987 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Quick Guide to Pressure Relief Valves PRVs written by Clifford Matthews and published by John Wiley & Sons. This book was released on 2005-07-22 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This indispensable book systematically guides you through Pressure Relief Valves and how they work. It shows how protective devices perform an important function in preventing the accumulation of overpressure that can result in failure and the uncontrolled release of stored energy. They are therefore categorised as safety critical items of engineering equipment. The book goes on to show that their design and testing is heavily controlled by published technical standards because many countries are covered by statutory legislation. The content of the book shows that service damage and degradation mechanisms are outlined for various applications – PRVs and bursting discs are used in a wide variety of process conditions, ranging from clean service to heavily corrosive process fluids. This results in a correspondingly large number of damage mechanisms that can prevent them from working if they are not inspected and tested correctly. Risk based inspection procedures are introduced in this book as a method of minimising the chances of failure, and therefore maintaining high levels of safety. This Quick Guide to Pressure Relief Valves is intended to provide easily accessible technical information for engineers and technicians involved in the operation, testing and maintenance of pressure systems. It also covers other types of protective devises such as bursting discs.
Download or read book Testing and Analysis of Safety relief Valve Performance written by American Society of Mechanical Engineers. Winter Annual Meeting and published by . This book was released on 1983 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Safety Relief Valve Handbook Design and Use of Process Safety Valves to Asme and International Codes and Standards written by Marc Hellemans and published by Butterworth-Heinemann. This book was released on 2009-08-28 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Safety Valve Handbook is a professional reference for design, process, instrumentation, plant and maintenance engineers who work with fluid flow and transportation systems in the process industries, which covers the chemical, oil and gas, water, paper and pulp, food and bio products and energy sectors. It meets the need of engineers who have responsibilities for specifying, installing, inspecting or maintaining safety valves and flow control systems. It will also be an important reference for process safety and loss prevention engineers, environmental engineers, and plant and process designers who need to understand the operation of safety valves in a wider equipment or plant design context. . No other publication is dedicated to safety valves or to the extensive codes and standards that govern their installation and use. A single source means users save time in searching for specific information about safety valves. . The Safety Valve Handbook contains all of the vital technical and standards information relating to safety valves used in the process industry for positive pressure applications. . Explains technical issues of safety valve operation in detail, including identification of benefits and pitfalls of current valve technologies. . Enables informed and creative decision making in the selection and use of safety valves. . The Handbook is unique in addressing both US and European codes: - covers all devices subject to the ASME VIII and European PED (pressure equipment directive) codes; - covers the safety valve recommendations of the API (American Petroleum Institute); - covers the safety valve recommendations of the European Normalisation Committees; - covers the latest NACE and ATEX codes; - enables readers to interpret and understand codes in practice. . Extensive and detailed illustrations and graphics provide clear guidance and explanation of technical material, in order to help users of a wide range of experience and background (as those in this field tend to have) to understand these devices and their applications. . Covers calculating valves for two-phase flow according to the new Omega 9 method and highlights the safety difference between this and the traditional method. . Covers selection and new testing method for cryogenic applications (LNG) for which there are currently no codes available and which is a booming industry worldwide. . Provides full explanation of the principles of different valve types available on the market, providing a selection guide for safety of the process and economic cost. . Extensive glossary and terminology to aid readers' ability to understand documentation, literature, maintenance and operating manuals. . Accompanying website provides an online valve selection and codes guide.
Download or read book Super Light Water Reactors and Super Fast Reactors written by Yoshiaki Oka and published by Springer Science & Business Media. This book was released on 2010-07-01 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Super Light Water Reactors and Super Fast Reactors provides an overview of the design and analysis of nuclear power reactors. Readers will gain the understanding of the conceptual design elements and specific analysis methods of supercritical-pressure light water cooled reactors. Nuclear fuel, reactor core, plant control, plant stand-up and stability are among the topics discussed, in addition to safety system and safety analysis parameters. Providing the fundamentals of reactor design criteria and analysis, this volume is a useful reference to engineers, industry professionals, and graduate students involved with nuclear engineering and energy technology.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1980 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1979-08 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Title List of Documents Made Publicly Available written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1982 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science and Engineering written by and published by . This book was released on 1977 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
