Integration of knowledge management system for the decommissioning of nuclear facilities

Abstract

The decommissioning of a nuclear facility is a long term project, handling information which begins from the design, construction and operation. Moreover, the decommissioning project is likely to be extended because of the lack of the waste disposal site especially in Japan. In this situation, because the transfer of knowledge and education to the next generation is a crucial issue, integration and implementation of a system for knowledge management is necessary in order to solve it. For this purpose, the total system of decommissioning knowledge management system (KMS) is proposed. In this system, we have to arrange, organize and systematize the data and information of the plant design, maintenance history, trouble events, waste management records etc. The collected data, information and records should be organized by computer support system e.g. data base system. It becomes a base of the explicit knowledge. Moreover, measures of extracting tacit knowledge from retiring employees are necessary. The experience of the retirees should be documented as much as possible through effective questionnaire or interview process. The integrated knowledge mentioned above should be used for the planning, implementation of dismantlement or education for the future generation. method of knowledge accumulation in the decommissioning work process is proposed. Enhancement of communication between present employeesCommunication activities, such as regular meetings, information exchange via intranet or e-mail are basis of the knowledge exchange in a plant. Based on the existing communication infrastructure, enhancement activities should be carried out for knowledge socialization. For example, application of Social Networking Service (SNS) inside the organization said to be an effective tool for improving communication and KM. Such system can hold personnel data base and automatically accumulate knowledge obtained during the daily work. Moreover, it is possible to load valuable technical information and questions raised by users and their answers. In this way, the system becomes knowledge accumulation and communication system without much effort. Enhancement of knowledge internalization of present employeesThe communication via computer system is not enough and face-to-face communication is still necessary. Then, activities such as study meeting of present employees or discussion between different generations are necessary for knowledge internalization. Knowledge transfer support from retireesAfter retiring of experienced employees, in some cases, the present employees need help of retirees. For this situation, retirees should join the above mentioned inside SNS even after retirement and give opinions or suggestions for the problem solution. This requires consent of retirees, but it is very effective to make up the knowledge gap.

Demolition of Reinforced Concrete by Steam Pressure Cracking System

“…Theoretical background -Elastic wave propagation and controlled cracking [2] To explain the controlled cracking phenomena using the elastic wave theory, the author schematically shows Figure A-1, which indicates the arrangement of the SPC and the induction hole, as well as the propagation and reflection of elastic waves in large concrete.…”

“…Demolition of large reinforced concrete structures at actual hazard sites is dangerous for workers and may cause environmental pollution. The dismantling of nuclear power plant buildings is a typical example [1,2]. The purpose of this study was to develop a total remote demolition system that is safe and does not cause environmental problems.…”

Dismantling of Reinforced Concrete Using Steam Pressure Cracking System: Drilling and Crack Propagation

“…Cracking the concrete structures of nuclear power plants is one such application [ 2 , 3 ]. The cracking of concrete reinforced by steel at dangerous sites with high radiation concentrations [ 4 ] and contaminated water is dangerous for workers and may cause environmental pollution [ 5 , 6 ]. The aim of this research was to create a remote dismantling system that is safe, rapid, environmentally friendly, and consumes less energy.…”

Controlled Cracking of Large Size Concrete Structures by a Steam Pressure Cracking Agent

“…Concrete structures that can no longer be used due to disasters have become a social problem [4][5][6] and require safe and urgent dismantling. There are three methods for dismantling large concrete structures that have been previously utilized.…”