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Process for gamma ray induced degradation of polychlorinated biphenyls

Patent ·
OSTI ID:871806
 [1];  [2];  [3]
  1. Idaho Falls, ID
  2. Shelley, ID
  3. Blackfoot, ID
+ Show Author Affiliations

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.

Research Organization:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
DOE Contract Number:
AC07-94ID13223
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Number(s):
US 5799257
OSTI ID:
871806
Country of Publication:
United States
Language:
English

References (3)

Evaluation of gamma radiation for degradation of a polychlorinated biphenyl in solution and on activated carbon journal August 1987
Dechlorination of DDT in Solution by Ionizing Radiation journal July 1971
The Radiolytic-chain Dechlorination of Polychlorinated Biphenyls in Alkaline 2-Propanol Solutions journal August 1974

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/588/204/
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500
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dose
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