Analysis results of the enhanced heat flux first wall panel elements

Abstract

In the framework of Procurement Arrangement (PA) realization, specialists from NIKIET and Efremov Institute are re-assessing and optimizing the design of the First Wall (FW) Full Scale Prototype (FSP) in order to demonstrate its manufacturability and qualify critical technological processes. The design of the FW FSP is based on the FW 14 type A. The semi-prototype has been manufactured in order to verify the FW design. Based upon the manufacturing experience, some modifications have been implemented into the FSP design in order to simplify assembly and manufacturing processes.Each FW includes plasma-facing components (FW fingers), FW beam, mechanical attachment system and electrical connection system with the shield block. All the FW fingers are attached to the FW beam by two poloidal straight welds. In order to provide access of welding equipment, the 60mm slot is performed on the FW front surface. The central slot insert (CSI) is implemented into the FW design in order to protect the central slot from plasma radiation. The fixation of the CSI is provided by three circular welds and the hydraulic connection is provided by two pipes. The basic design of the CSI has been modified in order to simplify manufacturing and final assembly.This paper presents results of thermal and structural analysis of the modified FW design in particular CSI.