In the design and analysis for the ITER TBM, a key issue is the cooling of the First Wall. For safety, the First Wall FW must be designed to withstand the thermal radiation load from the plasma and the nuclear heat generated by nuclear reaction, and it should satisfy related stress criteria. For technology, it also should meet a pressure drop limits and other engineering requirement.

The former cooling scheme design showed some shortcoming in temperature distribution uniformity and pressure drop, in order to improve it, a new cooling scheme has been designed and analyzed.

The paper describes the detail of the new cooling scheme of FW, and a series related analysis was conducted to compare with former design. In the preliminary analysis, the new cooling scheme design showed much advantage to the former design.

The working conditions of the analysis have been set to ITER design condition. The performances and the results obtained thermo-hydraulics and stress, are presented.

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