[en] A study has been performed to develop a conceptual design of a maintenance system for the doublet-type 3.8 meter Ignition Test Reactor (ITR) concept developed for The Next Step (TNS) fusion reactor program. The maintenance concept was developed in accordance with the ''low exposure exterior'' or minimized remote maintenance concept. This report provides an outline of the contact and remote maintenance requirements and descriptions of various equipment necessary to fulfill these requirements. Included are step-by-step outline operational procedures and preliminary cost and schedule estimates for Title I, Title II, and Title III engineering operations and Title III equipment fabrication