Thermo-Structural Optimization of the ITER ICRH Four Port Junction and Straps Against In-Vessel Design Criteria

Thermo-Structural Optimization of the ITER ICRH Four Port Junction and Straps Against In-Vessel Design Criteria

Thermo-Structural Optimization of the ITER ICRH Four Port Junction and Straps Against In-Vessel Design Criteria 150 150 UKAEA Opendata

Thermo-Structural Optimization of the ITER ICRH Four Port Junction and Straps Against In-Vessel Design Criteria

Design optimization work has been conducted on the ITER Ion Cyclotron Resonance Heating (ICRH) Four Port Junction (4PJ) and Straps – a sub-assembly of the antenna. The aim of the analysis is to evaluate ways of making the component compliant with SDC-IC rules while balancing the competing demands of different performance requirements. Of particular interest are the bends that connect the 316L(N) strap pipes to its housing, where previous work had shown that primary plus secondary stresses would result in a low predicted fatigue life. The aim of the study was to explore the possibility of reducing stresses in these bends. Coupled ANSYS CFX and structural models are used to calculate coolant and metal temperatures and resulting stresses due to incident and self-generated heat. Although all of the modifications explored resulted in primary plus secondary stresses exceeding the cyclic damage design criteria, some avenues are identified for future studies and a reduction in stress towards the target is obtained.

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07/10/2014