Engineering and design aspects of the TFTR vacuum vessel bakeout and cooling system

This paper presents the engineering and design aspects of the TFTR-Vacuum Vessel Cooling Systems (the Shell System and the Bellows System) and the bakeout System. The fabrication of the systems is presently under construction at Chicago Bridge and Iron, Greenville, PA. A previous described the preliminary fluid (dry air and nitrogen) systems used to cool and heat the Vacuum Vessel. This paper updates the previous one. The emphasis is on the engineering approach, evaluation and design related to the three major operational scenarios of the TFTR, namely - Normal Operation, Discharge Cleaning and Bakeout. This paper presents the cooling and heating loads, the flow distribution, one-dimensional temperature distribution evaluation, poloidally and toroidally, a bakeout scenario and the corresponding design solutions, such as the heating/coolilng jacket, diagnostic covers with remote jumper lines, access plates and adjustable orifices in order to balance the flow