Investigation of S{sub 2}F{sub 10} production and mitigation in compressed SF{sub 6}-insulated power systems. Final report, Volume 1: Executive summary
- Oak Ridge National Lab., TN (United States)
- National Inst. of Standards and Technology, Gaithersburg, MD (United States)
- Ontario Hydro Technologies, Toronto, Ontario (Canada)
- Hydro-Quebec, Varennes, Quebec (Canada)
A CRADA was established in 1991 to study the production and mitigation of S{sub 2}F{sub 10}, one of a number of toxic by-products formed by electrical discharges in the insulating gas SF{sub 6}. Since compressed SF{sub 6} is extensively used as an insulation and current interruption medium in electric power equipment, ensuring the safe operation and maintenance of this equipment is an important issue for utilities, government agencies, and manufacturers. Each of the three research laboratories developed a highly sensitive detection method for S{sub 2}F{sub 10}: (1) Oak Ridge National Laboratory, gas chromatography/cryogenic enrichment (less than 10 ppbv sensitivity); (2) National Institute of Standards and Technology, gas chromatography/mass spectrometry/thermal conversion (less than 10 ppbv); (3) Ontario Hydro Technologies, Fourier transform infrared spectrometry (FTIR) (less than 100 ppbv). Studies showed that S{sub 2}F{sub 10} can be produced in the laboratory by corona, spark, and power arc discharges and that the production rates for each type of discharge decrease in that same respective order. In power arcs, SOF{sub 2} is by far the dominant species. The field survey provided baseline data and demonstrated the feasibility of taking and analyzing field samples using the techniques developed under this CRADA. It was found that in power arcs the amount of S{sub 2}F{sub 10} produced is relatively insignificant compared to the amount of the SOF{sub 2} produced. The knowledge gained from this CRADA should also be beneficial for the development of routine procedures for gas analysis, so that analysis of the decomposition products of SF{sub 6} will become a standard method for addressing the issues of health and safety, equipment reliability and aging, and diagnostics for GIS (Gas-Insulated Substations).
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 161463
- Report Number(s):
- ORNL/M--4314; ON: DE96003188; CRN: C/ORNL--90-0002
- Country of Publication:
- United States
- Language:
- English
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