Results 1 - 10 of 609
Results 1 - 10 of 609. Search took: 0.025 seconds
|Sort by: date | relevance|
[en] The successful application of the SLOWPOKE concept to satisfy the heating needs of institutions and building complexes is described. Although the load factor for heating in Japan may not be as high as those experienced in other countries of the northern hemipshere, this particular application clearly demonstrates that small, special purpose, ultra-safe nuclear energy sources are technically and economically viable. They can be designed for easy operation and maintenance, to be located in urban areas and remote communities, thereby satsifying a broad spectrum of energy needs that cannot be served by central nuclear electrical generators
[en] Over 25% of the primary energy consumption in most of the countries of the northern Pacific Basin is used to heat buildings. This represents an important opportunity for nuclear energy to significantly reduce the dependence on fossil fuels in an end-use application that is readily amenable to substitution. In a major departure from traditional nuclear power technology, Atomic Energy of Canada Limited has developed the SLOWPOKE Energy System - a 10 MWt nuclear heat source specially designed to satisfy the needs of local heating systems used by buildings and institutions. A prototype reactor has been constructed to verify in a very demonstrative way that the technical, economic and safety criteria for nuclear district heating systems can in fact be met
[en] Atomic Energy of Canada Limited now has a new product, the SLOWPOKE Energy System, that provides low temperature heat suitable for building and process heating. The SLOWPOKE Energy System is sized to deliver up to 10 megawatts of hot water at up to 90 degrees C, appropriate for large buildings and industrial processes. It is designed for operation without the full-time attendance of dedicated staff and, because of its inherent safety, for siting close to users. At less than 2 cents/kWh, the heat is competitive with oil, gas and electricity in most regions of Canada and the world
[en] Through the short history of the modern wind turbine, electric utilities have made it amply clear that they have held a preference for large scale wind turbines over smaller ones, which is why wind turbine builders through the years have made numerous attempts develop such machines - machines that would meet the technical, aesthetic and economic demands that a customer would require. Considerable effort was put into developing such wind turbines in the early 1980s. There was the U.S. Department of Energy's MOD 1-5 program, which ranged up to 3.2 MW, Denmark's Nibe A and B, 630 kW turbine and the 2 MW Tjaereborg machine, Sweden's Naesudden, 3 MW, and Germany's Growian, 3 MW. Most of these were dismal failures, though some did show the potential of MW technology. (au)
[en] Beam was first circulated in the Spallation Neutron Source (SNS) ring in January 2006. Since that time we have been working to raise the beam power to the design value of 1.4 MW. In general the power ramp up has been proceeding very well, but several issues have been uncovered. Examples include poor transmission of the waste beams in the injection dump beam line, and cross-plane coupling in the ring to target beam transport line. In this paper we will discuss these issues and present an overall status of the ring and the transport beam lines.
[en] A concept for a high-efficiency small nuclear reactor of 2 MWth is proposed for generating electricity. An integrated liquid-sodium/fuel cylindrical module is used as the basis to achieve high primary temperatures at low pressure while ensuring a high level of safety through the simplicity of the design. The reactor physics and primary thermal hydraulics are discussed
[en] In 1984 work started on developing and building a 5MW test heating reactor (THR) at the Institute of Nuclear Energy Technology of Tsinghua University, China. The I and C system for the THR was developed at the same time. Although a fully computerized instrumentation and control (I and C) system was feasible and should perform substantially better than a conventional hard-wired system, its advantages were not yet fully appreciated by those heading the project or the authorities who were concerned about reliability. Lack of experience in using such systems was a real concern. The compromise design included a mixture in which the computers replaced conventional instruments wherever possible but not in performing or actuating protection functions for which a conventional protection system was provided. As the THR is a new type of reactor, it seemed appropriate to the designers initially to have the computer provide only monitoring functions. Its role will be extended to include control functions after sufficient operating experience is gained. (author)
[en] High power combiners are very essential components for combining high RF power. 180 degree hybrid power combiner has been designed in the MHz frequency range using 3D electromagnetic simulation code. The combiner is a four-port device, two ports are used for inputs, one port is for output and the fourth port is used for dummy load. This component is a 70.7 Ohm type, made out of co-axial line section. Transition ports are coaxial type, EIA 9 inch 50 Ohm. While designing, VSWR and insertion loss are kept below 1.05 (and) 0.1 dB respectively for the operating frequency. This component is designed to handle 2.5 MW of RF power. To accommodate for long pulse operation (CW mode) inner structures are actively cooled. This combiner could be used for combining two 1.25 MW outputs for each of the 8 ITER ICRF source systems for delivering 2.5 MW on varying loads. In this paper, detail design and simulation results of high power combiner will be discussed. (author)
[en] Calabazas Creek Research, Inc. developed a 1.5 MW RF load for the ITER fusion research facility currently under construction in France. This program leveraged technology developed in two previous SBIR programs that successfully developed high power RF loads for fusion research applications. This program specifically focused on modifications required by revised technical performance, materials, and assembly specification for ITER. This program implemented an innovative approach to actively distribute the RF power inside the load to avoid excessive heating or arcing associated with constructive interference. The new design implemented materials and assembly changes required to meet specifications. Critical components were built and successfully tested during the program.