Development of computer systems for planning and management of reactor decommissioning

The computer systems for planning and management of reactor decommissioning were developed for effective implementation of a decommissioning project. The systems are intended to be applied to construction of work breakdown st ructures and estimation of manpower needs, worker doses, etc. based on the unit productivity and work difficulty factors, which were developed by anal yzing the actual data on the JPDR dismantling activities. In addition, info rmation necessary for project planning can be effectively integrated as a g raphical form on a computer screen by transferring tile data produced by su bprograms such as radioactive inventory and dose rate calculation routines among tile systems. Expert systems were adopted for modeling a new decommis sioning project using production rules by reconstructing work breakdown str uctures and work specifications. As the results, the systems were character ized by effective modeling of a decommissioning project, project management data estimation based on feedback of past experience, and information inte gration through the graphical user interface. On the other hands. the syste ms were validated by comparing the calculated results with the actual manpo wer needs of the JPDR dismantling activities; it is expected that the syste ms will be applicable to planning and evaluation of other decommissioning p rojects.