The framework of intelligent support system for the maintenance of nuclear power plant is proposed in this paper with emphasis on the combined use of a portab le device and intelligent information processing. The purpose of this system is the realization of flexible inspection process and effective diagnosis process to be performed on-site with the aid of the mobile agent capable of performing various tasks moving along the network. The results of the scenario-based and f unction-based evaluation based on ...
英字タイトル:
Application of Mobile Agent Technology for Maintenance Support of Nuclear Power Plants

The framework of intelligent support system for the maintenance of nuclear power plant is proposed in this paper with emphasis on the combined use of a portable device and intelligent information processing. The purpose of this system is the realization of flexible inspection process and effective diagnosis process to be performed on-site. The prototype system has been implemented for the experimental facility with mobile-agent technology and PDA (personal digital assistant) to show the basic function...
英字タイトル:
Development of Maintenance Support System using Portable Device and Mobile Agent

If the wireless communication is feasible in the concrete structure of power plants, it is effective for us to reduce the construction cost, improve the placement of equipment and change facilities easily. In buildings of such a power plant, the reinforced concrete (RC) walls might be more than one meter in thickness, with high rebar density. Therefore, radio wave transmission over this kind of concrete walls was studied to discuss feasibility. Aperture parts of walls, such as doors, whose thickness is ...
英字タイトル:
A feasibility study of the transmission radio wave over the reinforced concrete structure in the buildings of power plants for wireless network

A heat-resistant flux gate magnetic sensor has been developed. Permendur, which has high Curie point, is employed as the magnetic core material and the detection method of the external magnetic field is modified. The characteristics of the developed magnetic sensor up to 500 oC were evaluated. The sensor output increased linearly with the external magnetic field in the range of ±5 G and the standard deviation at 500 oC was about 0.85G. ...
英字タイトル:
Development of Heat-resistant Magnetic Sensor

A magnetic sensor which can be applied to measurement at elevated temperature was newly developed. It is a kind of flux gate magnetic sensor. Permendur was employed for a magnetic core instead of Permalloy which is commonly used because Permendur has much higher Curie point, about 1000oC. Heat resistant ceramic coating Cu wires were used for coils. External magnetic field is detected by shift of peak position of differential permeability during induction of triangular excitation current. A magnetic co...
英字タイトル:
Development of High Temperature Magnetic Sensor