Minimum dose path planning method for virtual nuclear facilities based on navigation mesh

The operation, maintenance and decommissioning of nuclear facilities have radiation risks. When workers work in the radiation area, it is necessary to carry out radiation protection through path planning. In order to optimize the dose field path planning algorithm, a virtual verification platform for dose field path planning is established based on the Unreal Engine. The platform includes virtual environment, dose field, and personnel dose assess-ment modules, which can meet the needs of dose field path planning algorithm research and optimization. Considering the complexity and variability of the environment in the operation process, a new dose minimum path planning algorithm based on navigation mesh is designed. Based on this algorithm, the number of grids for path planning in complex or large scenes is significantly reduced, and the calculation time of the algorithm is reduced while ensuring the optimal dose. The simulation results show that the minimum dose path planning method based on navigation mesh can effectively reduce path planning time and ensure the safety of personnel during the decommissioning of nuclear facilities.