Process Design of ITER Component Cooling Water System (CCWS-1)

ITER is designed to have a cooling water system able to remove the thermal power generated by the Tokamak during all the operation modes and to transfer it to the atmosphere. This system includes multiple closed loop sub-systems, divided into primary and secondary systems, and a tertiary open loop called HRS (heat rejection system). One of these specific secondary sub-systems is the Component Cooling Water System 1 (CCWS-1), which has the main scope to serve the primary system called TCWS (Tokamak Cooling Water System) and some auxiliary systems that could contain radioactive inventories during ITER operation. The main requirement of CCWS-1 is to provide cooling water to its clients keeping pressure, temperature, flow-rate and water quality within the prescribed values. This thesis describes some of the works performed for the design of CCWS-1, providing some observations and suggestions for future adjustments and updates. In particular, the present work concerns the process design of CCWS-1 and will first focus on the thermo-hydraulic steady state analysis of the system using a model implemented in AFT Fathom software. This model will help to understand if the design criteria and parameters required by the clients are respected and if the system will need design adjustments. The design of the overpressure protection system that is needed to cope with those unwanted overpressure scenarios that can bring the system to unsafe conditions is also performed. Concurrently, the definition of the design conditions of the system, as well as the completion of the P&IDs is performed. The three sections are interconnected with each other and require results and parameters from one another. The overall work was thus carried out in parallel with the help of other important steps of the design process that are in progress, like the 3D model design in AVEVA E3D, from which was modelled the system analysed in AFT Fathom, the transient water hammer analysis and the stress analysis calculations. This work thus requires a future update based on the final layout of the system and the implemented modifications