Author/Authors :
Dammann، نويسنده , , A. and Arumugam، نويسنده , , A.P. and Beaudoin، نويسنده , , V. and Beltran، نويسنده , , D. and Benchikhoune، نويسنده , , M. and Berruyer، نويسنده , , F. and Cortes، نويسنده , , P. and Gandini، نويسنده , , F. and Ghirelli، نويسنده , , N. and Gray، نويسنده , , A. and Hurzlmeier، نويسنده , , H. and Le Page، نويسنده , , M. and Lemée، نويسنده , , A. and Lentini، نويسنده , , G. and Loughlin، نويسنده , , M. and Mita، نويسنده , , Y. and Patisson، نويسنده , , L. and Rigoni، نويسنده , , G. and Rathi، نويسنده , , D. and Song، نويسنده , , I.، نويسنده ,
Abstract :
The external walls of the Tokamak building, made of thick concrete, provide the nuclear shielding for operators working in adjacent buildings and for the environment. There are a series of openings to these external walls, devoted to ducts or pipes for ventilation, waveguides and transmission lines for heating systems and diagnostics, cooling pipes, cable trays or busbars. The shielding properties of the wall shall be preserved by adequate design of the openings in order not to affect the radiological zoning in adjacent areas. For some of them, shielding properties of the wall are not affected because the size of the network is quite small or the source is far from the opening. But for most of the openings, specific features shall be considered. Even if the approach is the same and the ways to shield can be standardized, specific analysis is requested in any case because the constraints are different.
Keywords :
ITER , shielding , opening , Tokamak complex
