Low-Activation Reinforced Concrete Design Methodology (11) -Preliminary FEM Analysis of Thermal Stress for Low-Activation Concrete -

摘要

In order to reduce long-lived residual radionuclide in a concrete shielding around a reactor, we newly developed two types of low-activation concrete, namely, "1/10-low-activation concrete" and "1/30-low-activation concrete". The physical and mechanical properties of these concrete were tested by the experimental works. The thermal stress generated by cement hydration was calculated by the three dimension FEM analysis targeting massive concrete in the reactor. Upon this study, we evaluated the realization of two types of low-activation concrete, and assessed the utilization for applying the above low-activation concrete to the reactor shielding wall, by comparing the experimental data to the calculated data. The evaluation conducted the 1/10-low-activation concrete was effective for the use of the shielding wall.