New inspection system is supposed to be introduced in nuclear power plants in Japan. In the corrective action program (CAP) based on quality management system, sharing of nonconformity information, management of corrective and preventative action are required. For management of the corrective action, relevant data have to be correctly and efficiently recorded and managed. In order to address the new system, we developed a maintenance support tool using augmented reality (AR) technology. This tool helps user...
英字タイトル:
Development of a Maintenance Supporting Tool Using Augmented Reality Technology

New inspection system is supposed to be introduced in nuclear power plants in Japan. In the corrective action program (CAP) based on quality management system、 sharing of nonconformity information、management of corrective and preventative action are required. For management of the corrective action、relevant data have to be correctly and efficiently recorded and managed. In order to address the new system、we developed a maintenance support tool using augmented reality (AR) technology. This tool helps users i...
英字タイトル:
Development of a Maintenance Supporting Tool Using Augmented Reality Technology(2)

Erroneous disconnection of buried pipe in reinforced concrete that cannot be found in the Existing radar type prospecting has occurring. However, it is very difficult to solve the problem which. For this purpose, we have developed a beam focusing radar system using the phased array method. Our development system shows to can be detected the buried object without interference to the rebar....
英字タイトル:
Exploration for buried object in concrete using phased array method

Condition-based maintenance(CBM) is maintenance performed on the basis of the condition of the equipment. The transition to CBM being considered, it is necessary to make appropriate decision, such as judgment of normality or abnormality. The threshold approach has generally been used for the judgment, but it provides ambiguous decisions due to individual variability of the equipment. Diagnosis using Data Analysis is a promising method to detect variations of the condition of rotating machinery. In this meth...
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Development of Diagnosis Method for Rotating Machinery by Data Analysis

Although a large amount of data (especially in abnormal conditions) is necessary to predict deterioration of nuclear power plant equipment, it is quite difficult to obtain it. For this reason, simulation is expected to be an effective approach to estimate conditions of equipment instead of data acquisition. In this study, we focused on and built a model for a motor operated valve, since the inspection cost is generally expensive due to the number of the valves used in a nuclear power plant. We analyzed the ...
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Development of a Method for Predicting Deterioration of Plant Equipment -Simulating Deterioration Behavior of a Motor Operated Valve-

We propose a new support system at work site using wearable devices, which can navigate some task, check some drawings and communicate with remote office. In recent years, mobile devices like tablet PCs, head-mount-display or cameras has become compact enough to wear, and these have been used in work site, such as plant, factory or warehouse. In order to improve the workability and accuracy in maintenance, surveillance or patrol to be carried out in nuclear power plants, we developed the support system ...
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Wearable Computing for Support Systems at Work Site of Nuclear Plant

The support system which utilized the wearable devices which consist of a smart glass, a camera, a portable computer, a headset, etc., and aimed at the efficiency improvement of field operation was developed. The evaluation results in the actual plant about real time transmission of image and sound between work field and remote office, and the self-localization using VSLAM (Visual Simultaneous Localization and Mapping) technology are reported....
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Wearable Computing for Support Systems at Work Site of Nuclear Plant(2)

During operation or regular inspections at power plants, regular patrol inspections are carried out in order to identify abnormalities at the site at an early stage. In the patrol inspection, in addition to recording the confirmation items, the site situation is recorded with images such as photographs and videos. It is a process that consumes the administrator's time because it is necessary to manage photos and videos by collating them with the layout of the building. For the purpose of streamlining these ...
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Development of information management technology for advanced patrol inspection

Due to the increase in aging social infrastructures and the shortage of human resources with the declining birthrate and aging society, labor saving in patrol and inspection work is required. The purpose of this work is not only to reduce the load of patrol and inspection but also to provide new services such as digitization of inspection data. We have developed autonomous four-wheel robot and drone as mobile platforms that can patrol on behalf of workers. The robot can take pictures of the target equipment...
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Autonomous mobile platform for advanced patrol inspection

This paper introduces the simply applicable vibration diagnostic technique to a vertical type pump in nuclear power pla nts. This technique is the combination of simple shaft vibration measurement by an ultrasonic vibrometer and a rotor dy namics simulation. By using this technique, for vertical type pump, a simple and high-precision diagnosis is attained. It is expected that this technique has effect in cost reduction and improvement of reliability in nuclear power plants....
英字タイトル:
Vertical type pump diagnosis using an ultrasonic vibrometer