Radiation Shielding of Fusion Systems

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http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/2265 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/2265 http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/2265 archive 4031 disk0/00/00/09/18 2010-09-10 12:29:04 2019-01-18 10:46:16 2011-07-19 16:25:57 thesis show 0 Davis Andrew Norman Paul University of Birmingham Radiation Shielding of Fusion Systems unpub QC 10col_ephy This thesis discusses the development, benchmarking and applications of activation dose analysis methods for fusion devices. The development and code logic of the Mesh Coupled Rigorous 2 Step (MCR2S) system is discussed. Following the development of the code, appropriate benchmarking studies were performed on the Frascati neutron generator, and revealed that the code was able to predict shutdown gamma ray doserates to within ±3% of experimentally determined values, for decay times between 3×105 and 107 seconds. The development of the Ion Cyclotron Resonance Heater (ICRH) with regards to neutronics was discussed. The ICRH went through a number of design stages and shutdown gamma ray dose rates were determined for each stage. It was determined that of all the designs analysed only one of them, the ﬁrst concept design for the internally matched design did not meet the shutdown dose criteria. This was due to a ﬂaw in the system design, brought about by a lack of consideration towards nuclear design. The ITER Light Imaging Detection and Ranging (LIDAR) system was subjected to a full shutdown nuclear analysis. It was found that the design of the LIDAR system supplied did not meet the ITER required shutdown gamma ray dose rate limit of 100 µSvhr−1, however use of the MCR2S system highlighted the components that contributed most to the shutdown gamma ray dose rate and were shown to be the mirror holder and the laser beam pipe. Future designs should include additional shielding around the beam pipe. 2010-07 2010-04 graduation eng This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. public 230 University of Birmingham School of Physics and Astronomy d_ph epsrc 2010-07 graduation