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This paper presents the results of a modelling study conducted to estimate the power crossing the separatrix (P(SOL)) in the ITER device during a standard start-up sequence. This is used to calculate the power intercepted by the start-up limiters and the resulting power load distribution. The models and methodologies applied to calculate P(SOL) and the power loads on the limiters are described in detail elsewhere ([e.g., M. Kobayashi et al., Nucl. Fusion. 47 (2) (2007) 61]) and only a brief mention of some of the main results is included here. These assessments show that for the range of conditions analysed, the maximum P(SOL) intercepted by the two ITER limiter start-up modules during the current ramp-phase is approximately 6 MW. The peak power load to each limiter is calculated to be approximately 5 MW/m{2}, but these values depends on assumptions on physical quantities (e.g., transport coefficients, i.e., D and Chi), which are uncertain and still await confirmation by experiments. Recommendations are made for modelling and experiments to extend the study presented here.

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Authors: FEDERICI G, ITER JWS Garching Co-center, Garching (DE);ZOLOTUKHIN O, ITER JWS Garching Co-center, Garching (DE);STROHMAYER G, ITER JWS Garching Co-center, Garching (DE);TANGA A, ITER JWS Garching Co-center, Garching (DE);LOWRY C, ITER JWS Garching Co-center, Garching (DE);KOBAYASHI M, National Institute for Fusion Science, Toki (JP);LOARTE A, EFDA-CSU Garching, Garching (DE);PORTONE A, EFDA-CSU Garching, Garching (DE);HORTON L, Max-Planck-Institut für Plasmaphysik, Garching (DE);FENG Y, Max-Planck-Institut für Plasmaphysik, Greifswald (DE);SARDEI F, Max-Planck-Institut für Plasmaphysik, Greifswald (DE);GRIBOV Y, ITER JWS Naka Co-center, Ibaraki-ken (JP);SHIMADA M, ITER JWS Naka Co-center, Ibaraki-ken (JP);POLEVOI A, ITER JWS Naka Co-center, Ibaraki-ken (JP);MITTEAU R, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Journal of Nuclear Materials (2007), online edition
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Record Number: 200718983 / Last updated on: 2007-03-26
Original language: en
Available languages: en