Assembly & Metrology of First Wall Components of SST-1

10th Asia Plasma and Fusion Association Conference

Parekh, Tejas^1 ; Santra, Prosenjit^1 ; Biswas, Prabal^1 ; Patel, Hiteshkumar^1 ; Paravastu, Yuvakiran^1 ; Jaiswal, Snehal^1 ; Chauhan, Pradeep^1 ; Ramesh Babu, Gattu^1 ; Prakash, Arun A.^1 ; Bhavsar, Dhaval^1 ; Raval, Dilip C.^1 ; Khan, Ziauddin^1 ; Pradhan, Subrata^1

Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar

382 428, India^1

关键词: Assembly process;    Assembly tolerance;    Electrical continuity;    Electrical isolation;    In-vessel components;    Planning of assembly sequences;    Support structures;    Tightening torque;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/823/1/012051/pdf
DOI  :  10.1088/1742-6596/823/1/012051

来源: IOP

【 摘 要 】

First Wall Components (FWC) of SST-1 tokamak, which are in the immediate vicinity of plasma comprises of limiters, divertors, baffles, passive stabilizers are designed to operate long duration (1000 s) discharges of elongated plasma. All FWC consists of a copper alloy heat sink modules with SS cooling tubes brazed onto it, graphite tiles acting as armour material facing the plasma, and are mounted to the vacuum vessels with suitable Inconel support structures at ring & port locations. The FWC are very recently assembled and commissioned successfully inside the vacuum vessel of SST-1 undergoing a meticulous planning of assembly sequence, quality checks at every stage of the assembly process. This paper will present the metrology aspects & procedure of each FWC, both outside the vacuum vessel, and inside the vessel, assembly tolerances, tools, equipment and jig/fixtures, used at each stage of assembly, starting from location of support bases on vessel rings, fixing of copper modules on support structures, around 3800 graphite tile mounting on 136 copper modules with proper tightening torques, till final toroidal and poloidal geometry of the in-vessel components are obtained within acceptable limits, also ensuring electrical continuity of passive stabilizers to form a closed saddle loop, electrical isolation of passive stabilizers from vacuum vessel.