GAC--ANL TNS scoping studies. Status report for FY-77, October 1, 1976--September 30, 1977. Volume IV. Reactor engineering

Conceptual designs have been developed for a 3.8 m Ignition Test Reactor (ITR) and a 4.2 m Upgradable Ignition Test Reactor (UITR). Both reactors are based on a doublet plasma cross section which enables them to achieve high β. The 3.8 m ITR is designed to achieve D-T ignition and maintain 30-second burns at a low duty factor of 0.1. The 4.2 m UITR is designed to be operated initially as an ITR and later be upgraded for net power Experimental Power Reactor (EPR) operation at a duty factor of 0.78. Both reactors utilize a water-cooled Inconel 625 plasma chamber with graphite tiles lining the inboard walls and movable limiters at the top and bottom of the chambers. The exposed walls of the chamber are coated with a carbon deposit. Water-cooled tungsten blocks, stacked in annular stainless steel tanks together with the inboard field-shaping coils, are used as the inboard shield. Water-cooled steel with lead cover layers is used for the bottom shield, while the other outboard shields are built up of stainless steel, boronated water, and lead. Both designs employ 12 superconducting NbTi toroidal field coils built up in pancake windings with stainless steel interleaving the conductor windings