X-ray monitoring of 230-kV cable potheads for maintenance inspections

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Description

A system has been designed by which pothead connections and corresponding components can be radiographically inspected for high mechanical stresses and failure potential. The system, employing a /sup 60/Co source with a special lead collimator, was used to make high-resolution radiographs of 230 kV potheads of cables in the high-pressure oil-filled pipe-type cable system at Grand Coulee Dam. The selection and use of the equipment are discussed. It was concluded from this operation that radiography can verify conditions of cables and potheads that could result in future problems. It cannot positively identify an imminent failure. This limitation of radiography should ... continued below

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Pages: 10

Creation Information

Lawrence, R.C. January 1, 1979.

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Description

A system has been designed by which pothead connections and corresponding components can be radiographically inspected for high mechanical stresses and failure potential. The system, employing a /sup 60/Co source with a special lead collimator, was used to make high-resolution radiographs of 230 kV potheads of cables in the high-pressure oil-filled pipe-type cable system at Grand Coulee Dam. The selection and use of the equipment are discussed. It was concluded from this operation that radiography can verify conditions of cables and potheads that could result in future problems. It cannot positively identify an imminent failure. This limitation of radiography should be recognized, and care must be exercised in the interpretation of inspection radiographs. However, there is a certain amount of confidence to be realized when the cable or pothead mechanical condition appears to be normal or as-designed, and when no changes can be observed over a period of time. With further development of radiographic techniques and special equipment, it should be possible to inspect the condition of cables inside steel-flange or ceramic potheads with a single type of cassette and a standard exposure geometry. (LCL)

Physical Description

Pages: 10

Notes

NTIS, PC A02/MF A01.

Source

  • Doble client conference, Boston, MA, USA, 2 Apr 1979

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  • Other: DE82008594
  • Report No.: PNL-SA-7529
  • Report No.: CONF-7904187-1
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 5478053
  • Archival Resource Key: ark:/67531/metadc1092607

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1979

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 20, 2018, 6:18 p.m.

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Lawrence, R.C. X-ray monitoring of 230-kV cable potheads for maintenance inspections, article, January 1, 1979; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1092607/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.