A. Alekseev

Final design and start of manufacture of the ITER Vacuum Vessel ports

The ITER Vacuum Vessel (VV) features upper, equatorial and lower ports. Although the port design has been overall completed in the past, the design of some remaining interfaces was still in progress and has been finalized now. As the ITER construction phase has started, the procurement of the VV ports has been launched. The VV upper ports will be procured by the Russian Federation DA, while the equatorial and lower ports will be procured by the Korean DA. The main industrial suppliers were selected and development of the manufacturing design is in progress now. Since the VV is classified at nuclear level N2, design and manufacture of its components are to be compliant with the French code RCC-MR and regulations of nuclear pressure equipment in France. These regulations make a strong impact to the port design and manufacturing process, which is in progress now.

Mechanics of Magnetic Fusion Reactors

Abstract This chapter is devoted to problems of mechanics related to the design of a magnetic fusion reactor. The main attention is given to the core components of a tokamak: the magnet system (MS) and vacuum vessel. The chapter starts with descriptions of the loading conditions, typical load-bearing schemes and computational algorithms. The normal operating conditions and accidental situations are considered. Specifics of stress analysis of the superconducting windings and load-bearing structures are discussed and practical examples are given. A separate section of the chapter describes the problem of magneto-elastic stability of an MS. Specific features of the structural assessment of a stellarator are given with the W7-X installation as an example. Analytical solutions of the magneto-elastic stability for a poloidal field coil system are given in appendixes to the chapter. The appendixes also describe physical simulations of MS, structural analysis codes and strength calculation standards for tokamaks.