The Study Of Personal Dose Assessment Method In The Virtual Radiation Field Of Nuclear Facilities

With the wide application of nuclear power technology in China, and the reminding of international nuclear accident, the nuclear safety and radiation protection has become the social issues that must highly concerned. The main task of the radiation protection is to reduce the radiation exposure of staff under the condition of justification of radiation practice.Recently, virtual reality has been used in the field of nuclear radiation. Benefit from the virtual reality technology (VR), we can estimate individual irradiation dose in advance and provide original data for the optimization of decommissioning project of nuclear facilities and the emergency maintenance plan. With the rapid development of VR, it has been become an effective way to reduce the irradiation dose. On the basis, an evaluation method of individual irradiation dose for the staff has been studied with the virtual reality technology. The main contents are as follows:1. Take the occupation irradiation dose of the staff who works in a virtual radiation scene as the research object, an evaluation method of individual irradiation dose focusing on the organ monitoring point was proposed by combining relevant theoretical knowledge of radiation protection. According to radiation field distribution and working plan, the proposed method can calculated the equivalent dose of sensitive organs and the effective dose of human body, as well as the cumulative dose of the whole scheme.2. With a sufficiently study for skeletal animation technology, virtual reality technology and data visualization technology, a virtual simulation system was designed. The system is consist of dose evaluation module, virtual scene building module, roaming simulation module.It has functions like individual irradiation dose evaluation, virtual scene building, roaming simulation and Human-Computer interaction.The research result shows that the proposed evaluation method for individual irradiation dose in the virtual radiation field is feasible. The method can provide technical support for nuclear facilities path-planning and optimization. In addition, the virtual radiation field of nuclear facilities made it possible for staff to roam in the virtual scene freely. And at the same time, it can also calculate the corresponding exposure dose according to the specific situation of roaming. The system provides a safety and effective platform for technicists to get familiar with working scene and understand the work tasks ahead of time.