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Title: Process for gamma ray induced degradation of polychlorinated biphenyls

The invention is a process for the in-situ destruction of polychlorinated biphenyl (PCB) compounds in transformer oils and transformers. These compounds are broken down selectively by irradiation of the object or mixture using spent nuclear fuel or any isotopic source of high energy gamma radiation. For example, the level of applied dose required to decompose 400 ppm of polychlorinated biphenyl in transformer oil to less than 50 ppm is 500 kilogray. Destruction of polychlorinated biphenyls to levels of less than 50 ppm renders the transformer oil or transformer non-PCB contaminated under current regulations. Therefore, this process can be used to treat PCB contaminated oil and equipment to minimize or eliminate the generation of PCB hazardous waste.
Authors:
 [1] ;  [2] ;  [3]
  1. (Idaho Falls, ID)
  2. (Shelley, ID)
  3. (Blackfoot, ID)
Publication Date:
OSTI Identifier:
871806
Report Number(s):
US 5799257
DOE Contract Number:
AC07-94ID13223
Resource Type:
Patent
Research Org:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
Country of Publication:
United States
Language:
English
Subject:
process; gamma; ray; induced; degradation; polychlorinated; biphenyls; in-situ; destruction; biphenyl; pcb; compounds; transformer; oils; transformers; broken; selectively; irradiation; mixture; spent; nuclear; fuel; isotopic; source; energy; radiation; example; level; applied; dose; required; decompose; 400; ppm; oil; 50; 500; kilogray; levels; renders; non-pcb; contaminated; current; regulations; treat; equipment; minimize; eliminate; generation; hazardous; waste; polychlorinated biphenyl; gamma ray; hazardous waste; nuclear fuel; spent nuclear; gamma radiation; polychlorinated biphenyls; transformer oil; energy gamma; in-situ destruction; induced degradation; situ destruction; /588/204/