[2C01-09] Fukushima 1

9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[2C02] Dose assessment for residents in the residential environment considering the transfer of substances between indoor and outdoor after nuclear accidents(5) Evaluation of resuspension coefficients based on experiments

*Azusa Nagakubo¹, Naho Hayashi¹, Jun Hirouchi¹, Yasuto Matsui², Minoru Yoneda², Shogo Takahara¹ (1. JAEA, 2. Kyoto Univ.)

Keywords:

Resuspension,Indoor,Nuclear Accidents

In the residential environment after a nuclear power plant accident, the effects of diffusion and deposition of radionuclides have been considered for exposure due to the entry of outdoor resuspended radionuclides into the indoor environment. In practice, however, resuspension of deposited particles also occurs. In this study, the resuspension coefficient, defined as the ratio of the airborne concentration to the floor surface deposition density, was obtained experimentally to construct a resuspension model for indoor deposited particles. In the experiment, the resuspension coefficient was obtained by spreading test dust on the flooring of a family home and measuring the concentration of resuspended particles when disturbances such as the operation of air conditioning and human movement were applied. The results showed that the resuspension coefficient ranged from 1.0e-5 to 1.0 (m^-1) depending on the type of disturbance and particle size.
This work was supported by Research Project on the Health Effects of Radiation organized by Ministry of the Environment, Japan.