Establishment of exposure risk assessment technique with continuous monitoring of personal environment.

本研究探索了基于连续个人暴露监测的风险评估的通用技术，旨在建立风险评估技术，以确定措施的优先级，并根据监测数据、防护设备的有效性和人体摄入量的估计得出有效的措施。对机器清洗工作、化学合成机器的维护工作等进行了现场测量，并证明可以根据工作实践了解个人接触浓度的变化。部分研究结果已在一篇科学论文中公布：在化学纤维纺纱过程中对噪音进行了测量，并评估了听力损失的风险;在气溶胶方面，对个人接触的连续监测证明能够澄清接触的瞬时变化，并确定减少接触焊接烟雾等有害物质的必要措施。因此，通过对个人暴露的连续监测，可以有效地评估防尘装置的通风性能。此外，对有机溶剂蒸气和气体的接触浓度的数学模型的研究进行了综述，并在科学论文中公布了结果。本文的研究成果为今后的风险评估研究提供了基础数据。

General-purpose techniques of the risk assessment with the continuous personal exposure monitoring were explored in this research, and it was aimed at establishing the risk assessment techniques to decide the priority of the measures and to derive the effective measures from monitored data, effectiveness of the protective equipments, and the estimation of the amount of the body intake.As for organic material, on-site measurement data were accumulated on the machine washing work, the maintenance work for chemosynthesis machines, and so on, and it was demonstrated that it was possible to know the changes in personal exposure concentration in accordance with the work practices. A part of the results was publicized in a scientific paper.As for noise, measurement were carried out and risk of hearing loss was assessed in the chemical fiber spinning process.As for aerosol, continuous monitoring of personal exposures was proved to be able to clarify instantaneous changes of exposure and identify necessary measures to reduce the exposure to hazardous substances such as a welding fume. The ventilation performance of dust-proofing devices can therefore be evaluated effectively with such continuous monitoring of personal exposures. This results was publicized in a scientific paper.Also, the research of the mathematical model which estimate the exposure concentrations of the vapor and gas of organic solvents was reviewed and the outcome was publicized, in a scientific paper. The achievements of this research were viewed to have the fundamental data of the future risk assessment research.