Abstract Number: 720 Working Group: Indoor Aerosols
Abstract Particulate radioactive substances were discharged from the reactor into the environment by the Fukushima nuclear power plant accident. It is therefore necessary to know the behavior of the particulate substances for more effective protective measures that would be applied in the future. Based on the results of post-accident monitoring on houses contaminated by the radioactive substances, it is found that the concentration of radioactive substances around a ventilation fan is higher than the other indoor locations. To explore the tendency of penetration and deposition by the difference of particle size and charge, we developed a chamber which simulates indoor and outdoor spaces by separating the chamber into two parts at the center. And a ventilation fan was installed in the center.
Particles with different level of electric charge were generated in the chamber simulating outdoor space. To analyze the difference of behaviors among the particles charged with the different levels, we observed particle size distributions, flow rates, and the charge density in the both chambers.
This research was supported by Nuclear Regulation Authority (NRA) and Japan Atomic Energy Agency (JAEA).