Aspects Of Safety And Reliability For Fusion Magnet Systems
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Release | : 1976 |
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General systems aspects of fusion magnet safety are examined first, followed by specific detailed analyses covering structural, thermal, electrical, and other aspects of fusion magnet safety. The design examples chosen for analysis are illustrative and are not intended to be definitive, since fusion magnet designs are rapidly evolving. Included is a comprehensive collection of design and operating data relating to the safety of existing superconducting magnet systems. The remainder of the overview lists the main conclusions developed from the work to date. These should be regarded as initial steps. Since this study has concentrated on examining potential safety concerns, it may tend to overemphasize the problems of fusion magnets. In fact, many aspects of fusion magnets are well developed and are consistent with good safety practice. A short summary of the findings of this study is given.
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Total Pages | : 482 |
Release | : 1976 |
Genre | : Fusion reactors |
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Release | : 1976 |
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Existing superconducting (SC) systems are shown to be inadequate for predicting successful performance of fusion magnets, since they have simpler geometry, much smaller size and simpler safety systems, less complex loading conditions and cyclical variations in loads, and are not exposed to radiation. Even so, a number of mechanical and electrical failures have occurred in existing magnet systems. Using the UWMAK and various EPR SC magnet designs as starting points, a number of potential safety and reliability problems are analyzed for future Tokamak TF coil systems. The voltage withstand capability of TF coils appears to be only a few hundred volts during quenches because of release of H2 from organic glues and insulators to form Penning mixtures with helium, ionization of He by gamma rays, and use of equipotential magnet structures.
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Release | : 1977 |
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Four accident classes for fusion magnet systems with examples of upper bounds on probability of occurrence are described. Some potential accident sequences are discussed. The mechanical, thermal, and electrical aspects of magnet safety and reliability are reviewed. (MOW).
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Release | : 1978 |
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Safety issues for future superconducting fusion magnet systems are examined. It is found that safety and failure experience with existing superconducting magnets is not very applicable to predictions as to the safety and reliability of fusion magnets. Such predictions will have to depend on analysis and judgement for many years to come, rather than on accumulated experience. A number of generic potential structural, thermal-hydraulic, and electrical safety problems are identified and analyzed. Prevention of quenches and non-uniform temperature distributions, if quenches should occur, is of great importance, since such events can trigger processes which lead to magnet damage or failure. Engineered safety features will be necessary for fusion magnets. Two of these, an energy dispersion system and external coil containment, appear capable of reducing the probability of coil disruption to very low levels. However, they do not prevent loss of function accidents which are of economic concern. Elaborate detector, temperature equalization, and energy removal systems will be required to minimize the chances of loss of function accidents.
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Total Pages | : 542 |
Release | : 1995 |
Genre | : Aeronautics |
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Release | : 1977 |
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The results of a two year study on magnet safety as it applies to Magnetic Fusion Energy Reactors and influences current program planning and experimental magnet design are presented in this summary report. Existing experience with superconducting magnet design and operation has been reviewed with the help of many active workers in this field and related to general reactor safety studies and techniques using the vast body of work generated in fission reactor safety programs as an illustrative reference base. A principal conclusion is that the inclusion of safety planning and design as a program component even at this early stage in Magnetic Fusion Reactor Development will save a great deal of money, time and design readjustment in the total thirty year program now envisaged.
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Total Pages | : 438 |
Release | : 1994-05 |
Genre | : Power resources |
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Total Pages | : 514 |
Release | : 1978 |
Genre | : Fuel |
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Total Pages | : 144 |
Release | : 1977 |
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