Calculation of Nuclide Absorption in Upper Room of HTR-10 Helium Circulator

This paper analyzes the physical model of SPATRA procedure and applicable data,proposes the calculation method for the nuclide absorption in the upper room of the primary helium circulator,and conservatively predicts the main nuclide adsorption in the upper room by the 4 layer calculation model.137Cs and 131I are taken as the example to explain the calculation result.The prediction results show that there is not much nuclide adsorpted in the primary helium circulator,and exchange activities can be carried out with certain protection.