A decommissioning program “RECYCLE SIMULATOR” should be put into practice in careful consideration of both recycle of non-radioactive wastes and reduce of radioactive wastes in the coming circulatory social system. Nevertheless current support systems for decommissioning planning mainly deal with decontamination, safety storage and dismantlement, so-called the prior part of the total decommissioning process. Authors emphasize the necessity of total planning of decommissioning including recycle or reuse of a large amount of demolition materials and are propelling the development of the multi expert system named “RECYCLE SIMULATOR”. This paper presents an algorithm of the recycling and reusing scenario of demolition materials and a summarized configuration. RECYCLE SIMULATOR for the demolished concrete was developed in 2000 and presented at 10th International Conference on Nuclear Engineering (icone10). Construction of a supporting multi expert system for the totally planning of decommissioning projects is objected by expansive development of the previous version. Main conclusions obtained from this paper are under this. (1) The previouslly developed expert system was advanced in its estimational function toward the satisfaction of decommissiong planners. (2) The applicability of the system was enlarged to all the radioactive and non-radioactive wastes, demolished metal and concrete products, in a corresponding site of decommissioning. (3) Finally decommissiong recycle simulator was completed in a harmonized unification.

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