Year
2004
Abstract
This paper presents initial results from our efforts to combine radiation dose estimation tools with discrete-event process simulation models. The intent is to create a framework capable of generating accurate estimates of worker radiation exposure as the workers perform assigned tasks in a user-described environment (i.e., number and type of sources, locations of sources and shielding/gloveboxes). This capability would provide management and engineers with valuable information for work planning and facility layout. This work takes advantage of a unique dose estimation software tool called Pandemonium developed at Los Alamos National Laboratory and Flexsim simulation software. Pandemonium uses point-kernel and diffusion theory to model a dose field. Using these relatively simple formalisms allows for a rapidly calculated estimate of the dose field. Flexsim is an object-oriented simulation software tool that allows the user to create an immersive 3-D visualization of the system being modeled. In particular, it allows the system elements to be placed in correct spatial relationship to each other while calculating standard system characteristics such as resource allocation, equipment utilization, and material throughput. In this initial version of the application, Pandemonium generates the dose fields for the specified environment. This data is then loaded into Flexsim where it can be visualized and accessed to estimate worker doses. The dose estimation occurs locally within each worker object. In addition to providing engineers with a tool for estimating worker dose, this work also could effectively be used to train technicians in the issues of working in a nuclear facility – the 3-D visualization capability will give the user a concept of the facility in which he will work and the radiation fields of which he might otherwise be unaware. INTRODUCTION In the past, Los Alamos has included dose estimates as one of the