| 要旨 |
To ensure durability and to extend the service life of the nuclear power plants, constructed by concrete material, the Rigid-Body-Spring Model (RBSM) combined with the Truss-network model is proposed for evaluating the leakage of radioactive gases. The simulation results are close to existing experimental results. Furthermore, the proposed model can investigate a concentration of pressure near a cracking area. Due to the abilities, the extension on a structural scale will help to avoid the exceeding amount of air leakage under the safety standard and to detect the maintenance area by a concentration of pressure. |