In Hamaoka nuclear power station, Condition Based Maintenance (CBM), which uses vibration diagnosis technology, has been introduced for some rotational devices such as horizontal type pumps or fans. Until now, a lot of instances, which include predicting a failure of bearing by detecting an upwarc tendency of vibration, and reducing an oscillation by adding adequate oil following a detection of insufficient bearing lubricant, show that CBM has an adequate predictive function as preventive maintenance metho...
英字タイトル:
Current and Future Diagnosis of vibration in horizontal type pumps

The plant maintenance method mainly used in the domestic nuclear power plant is TBM (Time Based Maintenance), while RCM (Reliability c entered maintenance) with risk assessment methods have been successfully used in U.S. In this paper, we discuss our research on the app licability of the U.S. technique to the Feed-water system at Hamaoka Unit-3, which was performed in 2004FY. Since these methods were t hought to be applicable also to Hamaoka, we will work on the solution of the extracted problems for the f...
英字タイトル:
Applicability examination of the Preventive Maintenance Optimization approach in Hamaoka nuclear power station

The low pressure turbine blades and rotor of Hamaoka nuclear unit 5 were damaged unexpe ctedly due to random vibration and steam-flashback vibration in June 2006. The permanen t reliability of the new blades were confirmed, base on the knowledge gained from the ac cident and our verification test....
英字タイトル:
Permanent countermeasures for the low-pressure turbine rotor damage of Hamaoka nuclear unit 5