This study proposes an innovative method for the monitoring the nuclear power plant. In this field, false detection of the trouble, both “false negative” and “false positive” will become a serious problem. In the other hand, since its complexity of nuclear power plant, simplicity of monitoring system is strongly required. Here, we propose a new simple and reliable health monitoring sensor n etwork system. Our pulse width modulation technique realizes a self-maintenance function in single signal line (token...
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Designing Reliable Sensor Network for Nuclear Power Plant

Abstract In the environment such as outer space where we cannot maintain the artifacts, it is the robustness that is important for artifacts. Thus the system which has the information processing circui t realizing self-maintenance function is desirable. So far some approach is tried to realize self-maintenance function using the qualitative reasoning technique. In this study, we try to apply distribu ted information processing technique to this qualitative reasoning information processor, by arranging many...
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Self-Maintenance Sensor Network Based on Mutual Communications With Reliability Index

Abstract I n an environment such as outer space where we cannot maintain the artifacts, it is the robustness that is important for artifacts. Thus the system, which has the i nformation processing circuit realizing self-maintenance function is desirable. So far some approach is tried to realize self-maintenance function using the qualitative reaso ning technique. In this study, we try to apply distributed information processing technique to this qualitative reasoning information processor, by arranging man...
英字タイトル:
Sensor Network Based on Mutual Communications With Reliability Index

Fiber Bragg Grating（FBG）is a kind of an optical device developed rapidly in these years and it has several excellent characteristics as a sensor for tempera- ture and/or strain. To investigate the applicability of FBG even as a vibration sensor for nuclear plant monitoring, novel measurement systems were devel- oped and tested. The results revealed that the FBGs had sensitivity to vibration and temperature even in radiation environments. Vibration and/or temperature of components around cooling system...
英字タイトル:
Applicability of a sensor based on optical fiber Bragg grating to nuclear plant monitoring

Abstract Fiber Bragg grating (FBG) is a kind of an optical device developed rapidly in these years and it has several excellent characteristics as a s ensor for temperature and/or strain. To investigate the applicability of FBG even as a vibration sensor for nuclear plant monitoring, novel measuremen t systems were developed and tested. The results revealed that the FBGs had sensitivity to vibration and temperature even in radiation environments. V ibration and/or temperature of components around cooling s...
英字タイトル:
Applicability of a sensor based on optical fiber Bragg grating to nuclear plant monitoring

In order to decommission TEPCO Fukushima Daiichi nuclear power plant, the removal of fuel nuclear debris is planned from 2021. It is demanded to grasp nuclear material element contents of the debris remaining inside the accident reactors for the effective and safe removal. Our research team aims to do the on-site analysis of the extracted debris by the Spectral X-ray CT method with the portable X-band (9.3 GHz) 950 keV/3.95 MeV electron linac X-ray sources and GAGG X-ray detector. It is expected to realize ...
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Fukushima Nuclear Fuel Debris Component Analysis by Spectral CT with Portable High Energy X-ray Source

This study proposes an innovative method for the monitoring the nuclear power plant. In this field, false detection of the trouble, both “false negative” and “false positive” will become a serious problem. In the other hand, since its c omplexity of nuclear power plant, simplicity of monitoring system is strongly required. Here, we propose new method of signal processing and data transmission to realize reliable monitoring system consisted of multiple nodes of sensors....
英字タイトル:
Sensor Network for Nuclear Power Plant

Abstract In the environment such as outer space where we cannot maintain the artifacts, it is the robustness that is important for artifacts. Thus the system which has the information processing circuit realizing se lf-maintenance function is desirable. So far some approach is tried to realize self-maintenance function using the qualitative reasoning technique. In this study, we try to apply distributed information processing t echnique to this qualitative reasoning information processor, by arranging many...
英字タイトル:
Distributed information processing for self-restoring artifacts.

This paper reports an outline of the prototype database system which can provide with information on needs and seeds for new inspection and mon itoring technology, which is applicable to the actual nuclear power plan ts for understanding ageing degradation conditions of plant components....
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Needs and seeds database of new inspection and monitoring technology for ageing equipment

1. 緒言課題をまとめた。これらのプロセス事例調査から、 原子力発電所機器の高経年化に的確に対応するには、 ・ 規制側が新技術の実機適用に関する審査を行う上 高経年化機器の状態を正確に把握するための検査・モで参照すべき技術基準類や国内外事例が多く、時 ニタリング技術、その結果に基づき経年劣化の進展を 間を要する一因となっている。 正確に予測するための評価技術、さらにその結果に応 ・新技術に対して、国内外の複数メーカにより同時 じて必要な対応措置を講じるための対応措置(補修等) ・比較評価を行った場合は、比......
英字タイトル:
Research on the applicability of new techniques for status monitoring of ageing equipment