Development of decommissioning management system for nuclear fuel cycle facilities (DECMAN)

not registered; not registered; Tanimoto, Kenichi

In making a plan of decommissioning of nuclear fuel facilities, it is important to optimize the plan on the standpoint of a few viewpoints, that is, the amount of working days, workers, radioactive waste, exposure dose of worker, and cost (they are called evaluation indexes). In the midst of decommissioning, the decommissioning plan would be modified suitably to optimize the evaluation indexes adjusting to progress of the decommissioning. The decommissioning management code (DECMAN), that is support system on computer, has been developed to assist the decommissioning planning. The system calculates the evaluation indexes quantitatively. The system consists of three fundamental codes, facility information database code, technical know-how database code and index evaluation code, they are composed using "Oracle" database and "G2" expert system. The functions of the system are as follows. (1)Fcility information database code Information of decommissioning facility and its rooms, machines and pipes in the code. (2)Technical know-how database code. Technical information of tools to use in decommissioning work, cutting, dose measure, and decontamination are there. (3)Index evaluation code. User build decommissioning program using above two database codes. The code evaluates five indexes, the amount of working days, workers, radioactive waste, exposure dose of worker, and cost, on planning decommissioning program. Results of calculation are shown in table, chart, and etc.