Development of an approach for the combined control of disassembly and postprocessing processes in plant dismantling

拆除规模庞大、结构复杂的封闭工业工厂（如核电站或炼油厂）是一项涉及物流流程规划和调度的巨大挑战。如果一个工厂被拆除，部件在现场进行后处理，例如由于安全法规要求在核设施中设置特殊控制区域，通常会导致后勤赤字。如果拆卸和后处理耦合得不够紧密，通常会导致工作系统工作量的巨大波动。整个拆解过程持续时间长，正在进行的工作库存高，产能交替短缺和过剩是其结果。这可能会降低拆解项目的经济效率。考虑到工厂拆解的特殊性，目前尚不存在拆解与后处理相结合的控制方法。本研究计划的目的是发展一种方法，在工厂拆除领域的拆卸和后处理过程的综合控制。该方法应考虑到与序列相关的限制，以这样一种方式开始对工厂的特定部件进行拆卸，以实现后处理工作站的恒定工作量。它也期望最小化在拆解和后处理之间正在进行的工作的缓冲库存。还应了解所取得方法的局限性。与对拆卸和后处理的孤立控制相比，通过控制拆卸顺序来转移工作量是否可以改善后勤目标，这个问题应该得到回答。

Dismantling closed industrial plants of huge sizes and complexity (e. g. nuclear power plants or oil refineries) is a big challenge concerning the planning and scheduling of the logistical processes. If a plant is dismantled and the components are postprocessed on-site, e. g. due to safety regulations demanding special controlled areas in nuclear facilities, often logistical deficits are resulting. If disassembly and postprocessing are not coupled close enough often massive fluctuations of the working systems workload are resulting. A long duration of the whole dismantling process, high inventories of work in progress and alternating short- and over-capacities are the result. This can decrease the economic efficiency of a dismantling project. An approach for a combined control of disassembly and postprocessing considering the specialties of plant dismantling does not exist yet. The objective of this research proposal is to develop an approach for a combined control of disassembly and postprocessing processes in the field of plant dismantling. The approach shall start disassembly activities for specific parts of the plant considering sequence dependent restrictions in such a manner that a constant workload of the postprocessing working stations is achieved. It is also aspired to minimize the buffer stock of work in progress between disassembly and postprocessing. Also knowledge shall be generated concerning the limitations of the achieved approach. The question shall be answered, if a shifting of workloads by controlling the disassembly sequence can improve logistical goals compared to an isolated control of disassembly and postprocessing.