Nuclear reaction with enormous energy, as a rich source of energy that has been brought to the human race, have developed as a nuclear power. However, the nuclear power generation is intended to provide a basic inherent “radioactivity risk“, the accident in Fukushima Dai-ichi Nuclear Power Plant was allowed to elicit it. Design, operation, and must be addressed to ensure safety measures in accordance with the role in the disaster areas. Prevention of abnormal event occurs, the enforcement of the mitiga...
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Nuclear safety to think with the society

We have developed a new index called Resilience index, which evaluate the reliability of system safety of nuclear power plant under severe accident by considering the capability to recover from the situation the system safety function was lost. In this paper, a detailed evaluation procedure for the Resilience index was described. System safety of a PWR plant under severe accident was then assessed according to the Resilience index concept to discuss applicability of the index. We found that the Resilie...
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Fundamental Study on Applicability of Resilience Index for System Safety Assessment

Many studies about the vibration of rotating vane of turbine had been performed. As in this paper, it was observed on a centrifugal pump operation that stationary part, ring-hat disk vane was vibrating, then it was studied that a mechanism of the phenomena was presumed from the vibration mechanism of turbine vanes.he experimental studies by using actual pump and analytical studies were performed. It was made clear that the interference between pump vanes and pump volute water cuts generate turbulence...
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Cause and Countermeasure of Stationary Disk Vibration Damage in Centrifugal Pump

Abstract This study proposes an innovative method for the evaluation of risk on Nuclear Power Plant, especially on the maintain of it. Luck of communication between the sectors, citizen, media, governments, companies and academy related to Nuclear Power Plant Industry, needs the sincer e communication with risk assessment based on economical data. Make clear the risk and hedge, benefit what individual people should have, what a district should have, and what country society should have. ...
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Risk Communication on Nuclear Power Plant

We have established a procedure for comprehensive safety assessment of aging plant using a combination of two indices; risk index and resilience index. And, we have identified important equipment using a simple resilience index and have extracted failure mode using a risk index with detailed plant model. Those were applied to three loop PWR plant as trials. We are reporting its summary and considering the effectiveness of the resilience index. ...
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Development of Comprehensive Safety Assessment Method for Aging Nuclear Power Plant Using Risk Index and Resilience Index

In this research, a new index “The Resilience Index” was proposed to evaluate the capability of nuclear power plant to recover from the situation of safety function lost. Three elements assumed to evaluate the resilience index are the achievement rate, necessary time, and probability of success of each accident management activity. The resilience index is expected to visualize the improvement of safety of each nuclear power plant against severe accidents. ...
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Development of Resilience Evaluation Method for Nuclear Power Plant (Part 1: Proposal of Resilience Index for Assessment of Safety of Nuclear Power Plant under Severe Accident)

保全学の構築と体系化－保全活動と規格基準－ 宮野 廣,Hiroshi MIYANO 保全学の構築と体系化－保全活動と規格基準－Structurization of Maintenalogy and its Systematization - Relationship between Maintenance and Rules-NOP法人日本保全学会会員東芝プラントシステム㈱　　　宮野　　廣　Hiroshi MIYANO 1.はじめに“保全”という行為は、「事故」、「故障」と言われる不具合が明確な場合に......
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Structurization of Maintenalogy and its Systematization - Relationship between Maintenance and Rules-

Functional assessment of equipment, considering the aged degradation of material, maintenance and so on, is required in order to evaluate the soundness of nuclear power plant in operation. In this report, equipment probabilistic risk is dealt with as showing the soundness of equipment, and the ideas how to consider aged degradation and maintenance on probabilistic risk are showed. ...
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Equipment Probabilistic Risk Assessment Considering Aged Degradation and Maintenance

We have developed a new index, called the resilience index, that evaluates the dynamic stability of the system safety of a nuclear power plant during a severe accident by considering the ability to recover system safety functions that have become lost in the situation. In this paper, a detailed evaluation procedure for the resilience index is described. The system safety of a PWR plant during a severe accident is then assessed according to the resilience index in order to discuss the applicability of ...
英字タイトル:
Development of Resilience Evaluation Method for Nuclear Power Plants (Part 3: Study on Evaluation Method and Applicability of Resilience Index)

We have developed a new index, called the resilience index, that evaluates the dynamic stability of the system safety of a nuclear power plant during a severe accident by considering the ability to recover system safety functions that have become lost in the situation. In this paper, a detailed evaluation procedure for the resilience index is described. The system safety of a PWR plant during a severe accident is then assessed according to the resilience index in order to discuss the applicability of ...
英字タイトル:
Development of Resilience Evaluation Method for Nuclear Power Plants (Part 3: Study on Evaluation Method and Applicability of Resilience Index)