Development of equivalent dose assessment methodology for the lens of the eye at nuclear power plant workers

As the International Commission on Radiological Protection lowers the equivalent dose limit for lens of the eye of radiation workers, the importance of radiation protection for the lens of the eye has been increased. In the case of poor working condition, such as high temperatures and humid environments at nuclear power plants, wearing an eye dosemeter near the worker's eye may interfere with work. In addition, it would not be reasonable for all workers to wear an eye dosemeter to evaluate the lens equivalent dose even in areas with an expected low exposure dose in the NPPs. Therefore, it is necessary to develop an indirect assessment method for lens equivalent dose. The purpose of this study is to develop an indirect assessment method for a lens equivalent dose using correlation factors between whole-body dose and eye. The correlation factors are calculated by MCNP simulation results.