This report describes the applicability study result of the diagnostic te chnology by the electromagnetism to an internal rotation object. In order to perform further detailed study, measurement of the basic data of a pu mp and the preliminary experiment in an air drive turbine were conducted....
英字タイトル:
Applicability study of the diagnostic technology by the electromagnetism to the rotating machines

Hamaoka Nuclear Power Station Reactor No. 5 was automatically shut down when an earthquake occurred in Suruga Bay on August 11, 2009. A special maintenance plan for inspections to verify the soundness of equipment and facilities in Hamaoka Nucle ar Power Station was formulated following the earthquake. The main steam turbine in Hamaoka Nuclear Power Station Reactor No. 5 was inspected based on the plan. The middle standard bearing box, which had the thrust bearing of the turbine was fou nd to lift slightly...
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Maintenance Report of Hamaoka Nuclear Power Station Reactor No. 5 Turbine Damaged by Suruga Bay Earthquake

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....
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Permanent countermeasures for the low-pressure turbine rotor damage of Hamaoka nuclear unit 5

This study proposes an electromagnetic method for the evaluation of the condition of the turbine in a nuclear power plant. Experimental re sults of a small turbine driven by an electric motor are shown in this paper. The results show that it is possible to detect the movement a nd condition of the impeller by applying the electromagnetic evaluation method. Moreover, an excitation experiment shows that the higher o rder vibration of the impeller can be detected and the distinction of the condition of with a...
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Material Evaluation of Cast Iron based on Eddy Current

Abstract: This study proposes an electromagnetic method for the evaluation of the condition of a turbine in a nuclear power plant. Experimental results of a small turbine driven by an electric motor are shown in th is paper. A high temperature superconductivity electromagnet is applied outside the case of the turbine to provide excitation magnetic field. On the other hand, pickup coils are placed near the impeller inside the case of the turbine. The experimental results show that it is not only possible to...
英字タイトル:
Electromagnetic evaluation of the impeller of a turbine using a hightemperature superconductivity electromagnet