Search

Occasional Topics
OTjapan Measures for Tsunami Striking Nuclear Power Station in Japan
Special Article: The Great Tohoku Earthquake (1)
OTjapan The Tragedy of “To Be” Principle in the Japanese Nuclear Industry
EJAMOT_CN3_Figure1_The_outside_view_of_CEFR OTChinaPlanning and Consideration on SFR R&D Activities in China
< All Occasional Topics

Information
ICMST-Kobe 2014
Nov 2(Sun) - 5(Wed), 2014
Kobe, Japan
Nuclear Regulation Authority Outline of the New Safety Standards for Light Water Reactors for Electric Power Generation
For Public Comment
Outline of New Safety Standard (Design Basis)
For Public Comment
New Safety Standards (SA) Outline (Draft)
For Public Comment
Outline of New Safety Standard(Earthquake and Tsunami)(DRAFT)
Issues
  Vol.5 No.4(Feb-25)
Vol.5 No.3(Nov-25)
Vol.5 No.2(Aug-26)
Vol.5 No.1(May-27)
< Other Issues

Featured Articles
EJAM5-3NT58 "Development of Future Prediction of Animation by coupling of Principle Component Analysis and Singular Spectrum Analysis"
EJAM5-3NT58 Validation of Multifrequency and Window-Multifrequency Techniques using Remote Field Eddy Currents for ISI of FBR Tubes
EJAM5-3NT59 Remote Controlled Robot with expandable features

JSM
Contacts
(EJAM): ejam@jsm.or.jp
(JSM): secretariat@jsm.or.jp
HP: http://www.jsm.or.jp
(in English)

 
Vol.2 No.3 previous GA 15 - AA 25 - 26 - SP4 ( 27 - 28 - 29 ) - NT 29 - 30 - 31 - 32next Vol.3 No.1
Academic Articles
Regular Paper (Invited) Vol.2 (2010/2011) p.200 - p.206
 

Future Bearing Inspection System using Portable Linac X-ray Source

 
Tomohiko YAMAMOTO1 and Mitsuru UESAKA2
 
1 Japan Atomic Energy Agency, 4002 Narita-chou, Oarai, Higashi-Ibaraki, Ibaraki, 311-1393 Japan
2 The University of Tokyo, 2-22 Shirakata-Shirane, Tokai, Naka, Ibaraki, 319-1188 Japan
 
Abstract
We have developed an X-ray source using portable X-band (9.3-12 GHz) linear accelerator (linac) for bearing real-time inspection. This system can generate pulsed-X-ray, therefore if X-ray repetition rate synchronizes with bearing rotation rate, we can get still images without stopping rotation. We succeeded in static imaging of rotating equipment. We start to develop more advanced X-ray generators using portable linac and multi-beam klystron (MBK). The advanced systems use higher electron energy linac and MBK as more stable radio-frequency (RF) source. We used 950 keV linac and 250 kW magnetron for X-ray imaging. However oscillation is unstable because magnetron is self-excited oscillator. Moreover, its temperature and rotation influence its output RF (Radio-Frequency) power, electron beam current and X-ray intensity. For the purpose of more stable operation and compactness of the system, we propose a multi-beam klystron (MBK) as its RF power source. In this paper, we show the basic parameters of the system which stability is tolerable for bearing condition based maintenance (CBM) in near future.
 
Keywords
Condition Based Maintenance (CBM), X-ray Source, X-band, Linac, Multi-Beam Klystron (MBK)
 
Full Paper: PDF EJAM Vol.2 pp.200-### "Future Bearing Inspection System using Portable Linac X-ray Source"
Article Information
Article history:
Received 31 January 2011
Accepted 25 February 2011