Background: In-wall shielding blocks which distribute within the double shell of Superconducting Tokamak vacuum vessel of the ITER projects

are used to shield neutrons produced by nuclear fusion.The moment deriving from the eddy current force is different from what is defined by the ITER IO in the structural analysis of ITER in-wall Shielding(IWS) block.Purpose: In order to simulate the real condition and get more accurate results

the method of moment compensation has been adopted.Methods: Both of adding and no-adding compensation moment conditions have been carried out separately in the structural analysis of the IWS based on ANSYS

and the corresponding results have been compared in the article.Results: The result shows the compensation moments have significant influence on the stress intensity of the components of in-wall shielding block.Conclusions: The accuracy of IWS structure simulation analyses results have been ensured by adding the compensation moment.The safety and reliability for design of in-wall shielding blocks are greatly improved.