The thesis focuses on the preliminary design of the new Component Cooling Water System: CCWS-2F. The CCWS-2F will be installed alongside the current cooling water systems already in place to cool the Tokamak and key parts of ITER, the International Thermonuclear Experimental Reactor, which is presently being built in Cadarache, France. In order to meet the requirements of the ITER new Baseline, which was established in 2024, CCWS-2F was designed to meet the additional cooling requirements, mainly for the Electron Cyclotron Heating (ECH) and Diagnostic systems. Important changes to this baseline approach, like switching the Blanket First Wall's beryllium to tungsten, necessitate a major improvement in the ECH system, raising its heating capacity from 20 MW to 67 MW.