Author/Authors :
Wang، نويسنده , , X. and Ioki، نويسنده , , K. and Morimoto، نويسنده , , M. and Choi، نويسنده , , C.H. and Utin، نويسنده , , Y. and Sborchia، نويسنده , , C. and TaiLhardat، نويسنده , , O. and Mille، نويسنده , , B. and Terasawa، نويسنده , , A. and Gribov، نويسنده , , Y. and Barabash، نويسنده , , V. and Polunovskiy، نويسنده , , E. and Dani، نويسنده , , S. and Pathak، نويسنده , , Zoe H. and Raval، نويسنده , , J. and Liu، نويسنده , , S. and Lu، نويسنده , , M. and Du، نويسنده , , S.، نويسنده ,
Abstract :
The ITER vacuum vessel is a torus-shaped, double wall structure. The space between the double walls of the VV is filled with in-wall shielding (IWS) and cooling water. The main purpose of the in-wall shielding is to provide neutron shielding together with the blanket and VV shells and water during ITER plasma operation and to reduce the ripple of the Toroidal magnetic field. Based on ITER vacuum vessel structure and related requirements, in-wall shielding are designed as about 8900 individual blocks with different sizes and several different materials distributed over nine vessel sectors and nine field joints of vessel sectors. This paper presents the design of the IWS, considering loads, structural stresses and assembly method, and also shows neutron shielding effect and TF ripple reduced by the IWS.
Keywords :
In-wall shielding , Vacuum vessel , ITER , Design
