Technique for Radiological Characterisation and Task Dose Evaluation Based on Gamma Scanning, Work Simulation and 3D Dose Modelling of a Work Site

The need exists in the nuclear world to reduce the doses to the workers in radioactive environments be it in routine maintenance or in decommissioning activities. A key factor in satisfying this need is the availability of a fast and adequate characterization and modeling of the work area. In this paper we propose a method to combine gamma and geometrical scanning measurements with the modeling and source fitting capabilities of the VISIPLAN 3D ALARA planning tool to model a nuclear site. The presentation also includes the application of human modeling tools to assess the dose to the worker for a given task. The characterization method is demonstrated based on an application in an industrial site.