Page 77 - Fundamentals of Magnetic Thermonuclear Reactor Design

60 Fundamentals of Magnetic Thermonuclear Reactor Design

FIGURE 3.19 VV sector and TFCs assembly. (Copyright ITER Organization, 2017).

3.8 REACTOR ASSEMBLY
More than 160 pieces of machinery are involved in the ITER assembly, testing and
moving works, including tilters, crossbeams, fixing means and adjusting devices.
The lifting system includes two bridge cranes mounted on rails that run the
entire length of the tokamak buildings, pre-assembly and intermediate testing
sites to form a 175-m-long crane bay. Every crane has two independent cargo
trucks with a carrying capacity of 375 t each. Together, the cranes can handle
loads of up to 1500 t. The heaviest single loads are the ‘sub-assembly’ tool
module and the cryostat base section, which weigh 1250 and 1200 t, respec-
tively. In some cases, components standing 20 m high and weighing hundreds
of tons have to be manoeuvred into required positions within tolerances of
3 mm. The CS will be the tallest lift of assembly operations (18.2 m).
Special sub-assembly tools are employed to pre-assemble the vacuum vessel
sectors together with the TF coils (Fig. 3.19).
One such tool will suspend a VV sector from its top, install associated
thermal shielding and rotate TF coils into position on the left and right sides
of the sector using supports moving on a pivoting rail. Upon installation and
anchoring of the TF coils, the 22-m-tall sub-assembly tool will be placed on a
pedestal (Figs 3.20 and 3.21) by the bridge cranes.
This procedure is repeated until all the VV sectors are mounted. A tilter and
two sub-assembly tools are projected to carry out the above operations in 90 days.

APPENDIX A.3.1 QUALITY ASSURANCE PROGRAMME
FOR REACTOR DESIGN

Complex processes, high technological level and therefore stringent technical
and safety requirements have characterised fusion power engineering from the
onset. The many years of experience internationally indicates that it is not only