Activation and radwaste analysis for ITER soft X-ray camera

The Soft X-Ray camera (SXR) is designed to measure the polar profile of plasma X-ray emissivity with high spatial and temporal resolution. The camera is located on the Equatorial 12 Port Plug of ITER Tokamak. During the nuclear operation phase, a large number of high-energy neutrons are generated. These neutrons will activate the camera components and make them radioactive. In order to evaluate the activation of SXR's structural and shielding materials, an activation and radwaste analysis has been performed, and the results are summarized in this paper. A simplified model of all necessary parts of SXR is integrated into the ITER C-lite model for neutron transport. The activation of the components is calculated using the FISPACT-2007 code. The safety scenario SA2 for ITER activation calculations is recommended as irradiation history. The contact dose rate provides recommendations for the maintenance of SXR. The security risk of decay heat to SXR is analyzed. Specific activity and clearance index provide the basis for the classification of radwaste. The linear relationship between the neutron flux and activation parameters is obtained by expanding the neutron flux, so that the activation of SXR can be rapidly predicted according to the flux measured in the actual operation of ITER.

Automated summary

The paper summarizes the radioactive activation of the Soft X-Ray camera in ITER Tokamak and the corresponding waste management analysis.