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Title: Ultrasonic decontamination in perfluorinated liquids of radioactive circuit boards

Abstract

A laboratory-scale ultrasonic decontamination system has been developed to demonstrate the application of Entropic System`s enhanced particle removal process to the radioactive decontamination of electronic circuit boards. The process uses inert perfluorinated liquids as the working media; the liquids have zero ozone depletion potential, are nontoxic, non-flammable, and are generally recognized as nonhazardous materials. The parts to be cleaned are first sonicated with a dilute solution of a high-molecular-weight fluorocarbon surfactant in an inert perfluorinated liquid. The combination of ultrasonic agitation and liquid flow promotes the detachment of the particles from the surface of the part being cleaned, their transfer from the boundary layer into the bulk liquid, and their removal from the cleaning environment, thereby reducing the probability of particle redeposition. After the cleaning process, the parts are rinsed with the pure perfluorinated liquid to remove residual surfactant. The parts are recovered after the perfluorinated liquid is evaporated into air.

Authors:
;  [1];
  1. Massachusetts Institute of Technology, Cambridge, MA (United States)
Publication Date:
OSTI Identifier:
89055
Report Number(s):
CONF-941102-
Journal ID: TANSAO; ISSN 0003-018X; TRN: 95:004215-0124
Resource Type:
Journal Article
Journal Name:
Transactions of the American Nuclear Society
Additional Journal Information:
Journal Volume: 71; Conference: Winter meeting of the American Nuclear Society (ANS), Washington, DC (United States), 13-18 Nov 1994; Other Information: PBD: 1994
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; ELECTRICAL EQUIPMENT; DECONTAMINATION; RADIOACTIVE MATERIALS; REMOVAL; LABORATORIES; SURFACTANTS; ULTRASONIC WAVES; FLUORINE COMPOUNDS; LIQUIDS; CLEANING

Citation Formats

Yam, C S, Harling, O K, and Kaiser, R. Ultrasonic decontamination in perfluorinated liquids of radioactive circuit boards. United States: N. p., 1994. Web.
Yam, C S, Harling, O K, & Kaiser, R. Ultrasonic decontamination in perfluorinated liquids of radioactive circuit boards. United States.
Yam, C S, Harling, O K, and Kaiser, R. 1994. "Ultrasonic decontamination in perfluorinated liquids of radioactive circuit boards". United States.
@article{osti_89055,
title = {Ultrasonic decontamination in perfluorinated liquids of radioactive circuit boards},
author = {Yam, C S and Harling, O K and Kaiser, R},
abstractNote = {A laboratory-scale ultrasonic decontamination system has been developed to demonstrate the application of Entropic System`s enhanced particle removal process to the radioactive decontamination of electronic circuit boards. The process uses inert perfluorinated liquids as the working media; the liquids have zero ozone depletion potential, are nontoxic, non-flammable, and are generally recognized as nonhazardous materials. The parts to be cleaned are first sonicated with a dilute solution of a high-molecular-weight fluorocarbon surfactant in an inert perfluorinated liquid. The combination of ultrasonic agitation and liquid flow promotes the detachment of the particles from the surface of the part being cleaned, their transfer from the boundary layer into the bulk liquid, and their removal from the cleaning environment, thereby reducing the probability of particle redeposition. After the cleaning process, the parts are rinsed with the pure perfluorinated liquid to remove residual surfactant. The parts are recovered after the perfluorinated liquid is evaporated into air.},
doi = {},
url = {https://www.osti.gov/biblio/89055}, journal = {Transactions of the American Nuclear Society},
number = ,
volume = 71,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}