In this paper

taking nuclear fusion reactor as a research object

one novel design method guided by parametric component design and variational assembly logic relation is presented. The parametric design relates to such components as center conductor post

PF coil

TF coil

divertor cassette

blanket

shielding and vacuum pumping. The solid modeling technology is used for all design objects

which will give the users a 3-D visualization. The design system introduced in the paper shows a new design means for agile design of nuclear fusion reactor and will promote the design to a desper stage.