The number of domestic radiation workers has been increasing in South Korea. There are approximately 100,000 radiation workers who are exposed to radiation more than the general public. This is because they work with radiation facilities and radioactive material. These occupational radiation exposure of radiation worker is low-dose radiation which is the relation between dose and health effects are unknown but radiation workers are exposed to these low-dose radiation almost every day. Therefore, the importance of radiation risk assessment and worker protection are growing up rapidly.
The Korean government has made the law for the radiation workers and has been operating management system of workers'' to protect the workers from radiation risk. However, the management system focus on personal exposure dose may run into some problems during the management process. For instance, each person has a different characteristics, and some people do not wear their personal dosimeter during working hours.
In this paper, I studied on the risk assessment for workplace of radiation facilities one of the methods of assessment for radiation risk to protect and manage the workers effectively.
The research approach was based on the KOSHA Risk Assesment, which is the most representative method for risk assessment in the domestic industrial world. Also, model or method for risk assessment selected by analysis of risk assessment method in radiation field, nuclear field and several industrial field.
As a result, a combination of method of scoring method using numerical expression and statistical method using collective dose data will be adequate. In addition, for the data acquisition, the government need to do integration of existing data management system and selection of additional data element.
When the risk assessment model is constructed, we could deduct illegal workplace. Therefore, we could manage many workplace effectively.
Consequently, it would serve our purpose of advanced protection of radiation workers from radiation.

Key Word : Risk Assessment Method, Occupational Radiation Exposure, Radiation Facilities, Workplace