Development of Computer Systems for Planning and Management of Reactor Decommissioning.

Abstract

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 structures and estimation of manpower needs, worker doses, etc. based on the unit productivity and work difficulty factors, which were developed by analyzing the actual data on the JPDR dismantling activities. In addition, information necessary for project planning can be effectively integrated as a graphical form on a computer screen by transferring the data produced by subprograms such as radioactive inventory and dose rate calculation routines among the systems. Expert systems were adopted for modeling a new decommissioning project using production rules by reconstructing work breakdown structures and work specifications. As the results, the systems were characterized by effective modeling of a decommissioning project, project management data estimation based on feedback of past experience, and information integration through the graphical user interface. On the other hands, the systems were validated by comparing the calculated results with the actual manpower needs of the JPDR dismantling activities; it is expected that the systems will be applicable to planning and evaluation of other decommissioning projects.

Review of project planning methods for deconstruction projects of buildings

“…We found out that current deconstruction planning approaches do not consider uncertainty and risk beyond the definition of a standard risk charge. Although some research approaches have considerable long planning horizons, where uncertainties prevail, such as Bartels (2009), Yanagihara et al (2001) and Iguchi et al (2004), these approaches do not yet include uncertainty or risk into their decision making. Thus, future research should focus on uncertainties and risk management in deconstruction planning.…”

“…PM methods for nuclear power plant deconstruction were presented by Yanagihara et al (2001) and Iguchi et al (2004). Yanagihara et al (2001) described a database model (COSMARD) that includes creation of a work breakdown structure, PERT scheduling with precedence constraints and cost estimation functionalities based on experience values.…”

“…PM methods for nuclear power plant deconstruction were presented by Yanagihara et al (2001) and Iguchi et al (2004). Yanagihara et al (2001) described a database model (COSMARD) that includes creation of a work breakdown structure, PERT scheduling with precedence constraints and cost estimation functionalities based on experience values. Estimation values of resource needs, radioactivity doses, duration and costs were derived per building element/facility component and based on an experience database.…”

A BIM-driven framework for integrating rules and regulations in the decommissioning of nuclear power plants

“…Digital transformation can transcend automation and optimisation, changes in process paradigms, implications for product and service improvements and redefinitions of business models. One of the early cases of digital transformation of decommissioning identified in the literature is that of a Japanese Power Demonstration Reactor (JPDR) initially developed for UNIX and then extended to the Windows Operating System (Yanagihara, 1993; Yanagihara et al , 2001). It was termed COSMARD (Code System for Management of JPDR Decommissioning) and makes use of tree-structured data processing algorithms reflecting the work breakdown structure (WBS) of typical decommissioning processes including manpower needs of both manual and remote dismantling tasks.…”

Is there only one way of project management theorizing, or are there multiple sector-specific project management domains?

“…Articles emphasized systematic and controlled PM for to-the-plan execution in projects where investors were seeking certainty and controllability from PM, with the focus on controlling projects and their impacts on the society. Pow sector articles research content related extensively to decommissioning of old nuclear facilities (Yanagihara et al, 2001a;Yanagihara et al, 2001b;Yanagihara, 1993;Krause, 2008). This content is strongly affected by the post-Chernobyl era, where the focus has been on deconstruction of nuclear energy systems rather than new systems construction.…”