Download or read book Ex reactor Determination of Thermal Gap and Contact Conductance Between Uranium Dioxide Zircaloy 4 Interfaces written by John E. Garnier and published by . This book was released on 1979 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ex reactor Determination of Thermal Gap and Contact Conductance Between Uranium Dioxide written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of thermal gap and contact conductance between depleted uranium dioxide (UO2) and Zircaloy-4 (Zr4) has been made utilizing two measurement apparatuses developed as part of this program. The Modified Pulse Design (MPD) apparatus is a transient technique employing a heat pulse (laser) and a signal detector to monitor the thermal energy transmitted through a UO2/Zr4 sample pair which are either physically separated or in contact. The Modified Longitudinal Design (MLD) apparatus is a steady-state technique based on a modified cylindrical column design with a self-guarding sample geometry. Description of the MPD and MLD apparatus, data acquisition, reduction and error analysis is presented along with information on specimen preparation, thermal property and surface characterization. A technique using an optical height gauge to determine the average mean-plane of separation between the simple pairs is also presented.
Download or read book Ex reactor Determination of Thermal Gap Conductance Between Uranium Dioxide Zircaloy 4 Interfaces BWR PWR written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of thermal gap conductance between UO2 and Zircaloy-4 has been initiated utilizing a unique transient pulse technique: Modified Pulse Design (MPD)--a technique employing a heat pulse (laser) and signal detector to monitor the energy transmitted through UO2-Zircaloy samples both in contact and separated by a gap. Initial experiments have been conducted as a function of temperature (to 873°K), gas composition (He, He : Ar, Ar), and gap width 6.0 x 10−4 and 2.18 x 10−3 cm). The thermal gap conductance is dependent upon these variables, and comparison with calculated results using existing models for the temperature jump distance is made. A new concept involving direct energy transfer across narrow gaps by individual gas molecules is also considered.
Download or read book Ex reactor Determination of Thermal Gap Conductance Between Uranium Dioxide and Zircaloy 4 written by John E. Garnier and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ex Reactor Determination of Thermal Gap Conductance Between Uranium Dioxide and Zircaloy 4 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An ex-reactor study of the thermal gap conductance between Uranium Dioxide (UO2) and Zircaloy-4 (Zr4) was performed under varying conditions of gas pressure (0.1 to 7 MPa); temperature (283 to 673 K); gas composition (He (100); Ar (100); He:Ar (51.79:48.21); and He:Xe (89.4:10.6)); and, average mean-plane separation distance D{sub mp} = 5.9 {micro}m (light contact); and, D{sub mp} = 23.1 {micro}m). In this report a description of the high pressure autoclave, specimen holder and associated apparatus is given together with experimental results. In conjunction with the experimental apparatus an assessment of determinant and indeterminant errors is made. In this report the predicted gap conductance based on the "ideal" expression for the gap conductance, H{sub g} = K{sub gas}/(d + g1 + g2) and assuming D{sub m}p = d and g1 = g2, is compared to the H{sub g} results and found not to be in agreement. Use of the ideal gap conductance expression under these conditions is seen to under-estimate the value of H{sub g} results. A discussion of possible reasons for the differences between the observed and predicted behavior is made. In addition to experimental errors resulting from gaseous convection, a detailed examination of the ideal gap conductance expression reveals that the basic assumptions (upon which the ideal gap conductance expression is derived) are not valid for real surfaces in close proximity and/or contact.
Download or read book Thermal Conductivity 16 written by David C. Larsen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Thermal Conductivity Conference was started in 1961 with the initiative of Mr. C. F. Lucks and grew out of the needs of researchers in the field. From 1961 to 1973 the Confer ences were held annually, and have been held biennially since 1975 when our Center for Information and Numerical Data Analysis and Synthesis (CINDAS) of Purdue University became the permanent Spon sor of the Conferences. These Conferences provide a broadly based forum for researchers actively working on the thermal conductivity and closely related properties to convene on a regular basis to ex change their ideas and experiences and report their findings and results. The Conferences have been self-perpetuating and are an example of how a technical community with a common purpose can transcend the invisible, artificial barriers between disciplines and gather togeth er in increasing numbers without the need of national publicity and continuing funding support, when they see something worthwi1e going on. It is believed that this series of Conferences not only will grow stronger, but will set an example for researchers in other fields on how to jointly attack their own problem areas.
Download or read book Thermal Contact Conductance written by C.V. Madhusudana and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer between two bodies in thermal contact is of fundamental importance in a wide variety of applications ranging from industrial and domestic processes to fundamental biology and chemistry. This book covers both the theoretical and practical aspects of thermal contact conductance. The theoretical discussion covers heat transfer through spots, joints, and surfaces, as well as the role of interstitial materials (both planned and inadvertent). The practical discussion includes formulae and data for use in designing heat-transfer equipment for a variety of joints, including special geometries and configurations.
Download or read book Proceedings of the U S Nuclear Regulatory Commission Water Reactor Safety Research Information Meeting written by and published by . This book was released on 1981 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Support and Development of Single rod Fuel Codes Program written by D. D. Lanning and published by . This book was released on 1987 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Conductivity 15 written by V. V. Mirkovich and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once again, it gives me a great pleasure to pen the Foreword to the Proceedings of the 15th International Conference on Thermal Conductivity. As in the past, these now biannual conferences pro vide a broadly based forum for those researchers actively working on this important property of matter to convene on a regular basis to exchange their experiences and report their findings. As it is apparent from the Table of Contents, the 15th Conference represents perhaps the broadest coverage of subject areas to date. This is indicative of the times as the boundaries between disciplines be come increasingly diffused. I am sure the time has come when Con ference Chairmen in coming years will be soliciting contributions not only in the physical sciences and engineering', but will actively seek contributions from the earth sciences and life sciences as well. Indeed, the thermal conductivity and related properties of geological and biological materials are becoming of increasing im portance to our way of life. As it can be seen from the summary table, unfortunately, proceedings have been published only for six of the fifteen con ferences. It is hoped that hereafter this Series will become increasingly well known and be recognized as a major vehicle for the reporting of research on thermal conductivity.
Download or read book GAPCON THERMAL 3 Verification and Comparison to In reactor Data written by D. D. Lanning and published by . This book was released on 1978 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The GAPCON-THERMAL-3 computer code is an outgrowth of the GAPCON series, written in response to a need to predict the interacting path-dependent thermal and mechanical behavior of oxide fuel rods.
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1982 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Spreading and Contact Resistance written by Yuri Muzychka and published by John Wiley & Sons. This book was released on 2023-08-29 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single source reference on how applying thermal spreading and contact resistance can solve problems across a variety of engineering fields Thermal Spreading and Contact Resistance offers comprehensive coverage of the key information that engineers need to know to understand thermal spreading and contact resistance, including numerous predictive models for determining thermal spreading resistance and contact conductance of mechanical joints and interfaces, plus detailed examples throughout the book. Written by two of the leading experts in the field, Thermal Spreading and Contact Resistance includes information on: Contact conductance, mass transfer, transport from super-hydrophobic surfaces, droplet/surface phase change problems, and tribology applications such as sliding surfaces and roller bearings Heat transfer in micro-devices and thermal spreaders, orthotropic systems, and multi-source applications for electronics thermal management applications Fundamental principles, thermal spreading in isotropic half-space regions, circular flux tubes and disc spreaders, and rectangular flux channels and compound spreaders Systems with non-uniform sink plane conductance, transient spreading resistance, and contact resistance between both non-conforming and conforming rough surfaces Providing comprehensive coverage of the subject, Thermal Spreading and Contact Resistance is an essential resource for mechanical, aerospace, and chemical engineers working on research in the fields of heat transfer, thermal management of electronics, and tribology, as well as thermal engineers and researchers in the field of thermal physics.
Download or read book NUREG CR written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1980 with total page 300 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 1986 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer Handbook written by Adrian Bejan and published by John Wiley & Sons. This book was released on 2003-06-30 with total page 1496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapters contributed by thirty world-renown experts. * Covers all aspects of heat transfer, including micro-scale and heat transfer in electronic equipment. * An associated Web site offers computer formulations on thermophysical properties that provide the most up-to-date values.
