The Advanced Test Reactor (ATR) is a 250-MW^th materials testing and nuclear research facility operated for the United States Department of Energy (DOE) by EG&G Idaho, Inc. The unique capabilities of the ATR can be readily adapted via hardware to produce large quantities of large-diameter (20 cm plus) doped silicon crystals. Conservative estimates place the production eapability in excess of 15 metric tons per year. The proposed hardware is based upon a closed-loop, hydraulic-shuttle-tube system.