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. ...
英字タイトル:
Development of Comprehensive Safety Assessment Method for Aging Nuclear Power Plant Using Risk Index and Resilience Index

保全の体系化について(第1回)―原子力発電所の保全活動の現状― 設楽 親,Chikashi SHITARA,千種 直樹,Naoki CHIGUSA,岩見 裕,Hiroshi IWAMI......

Abstract The total system design on Nuclear Plant ensures “Nuclear safety” with making practically achievable efforts to prevent and mitigate nuclear and radiological accidents. The performance based system design with “Defence in depth (D-I-D)” has been laid out as the key means in “preventing accidents”, “controlling escalation to serious consequences”, and “mitigating impact to the public”. D-I-D is extended to the management of severe accidents, and is an approach intended to provide protection a...
英字タイトル:
Development of Resilience Evaluation Method for Nuclear Power Plant (Part4: Concept of System Safety on Operating Nuclear Power Plants)

The Design Optimization including not only performance, but also reliability is strongly required at the conceptual design phase to achieve the space transportation systems with competitive ability, especially for the propulsion systems. The distribution of design margin and risk in whole systems had to be grasped by sensitivity analysis for failure limits. This paper describes the typical failure mode and its causes of liquid rocket engine, and the recent efforts to establish design methodology to realize ...

During the maintenance of nuclear power plants, it is important to reduce the radiation exposure of the workers. Auditory sensation has been widely used for alerting them to the radiation exposure such as personal dosimeters, which alert the user to radiation level by acoustic alarms. Although the measurement of radiation intensity has been more and more precisely, few study has focused on the selection of the effective alarm. The objective of this study therefore is to evaluate which acoustic feature is be...

The total system design on Nuclear Plant ensures “Nuclear safety” with making practically achievable efforts to prevent and mitigate nuclear and radiological accidents. The performance based system design with “Defence in depth (D-I-D)” has been laid out as the key means in “preventing accidents”, “controlling escalation to serious consequences”, and “preventing harmful consequences to the public”. D-I-D is extended to the management of severe accidents, and is an approach intended to provide protectio...
英字タイトル:
Concept of System Safety on Operating Nuclear Power Plant