A MECHANISM FOR THE RESUSPENSION OF PARTICLES FROM BURNING PLEXIGLAS
The resuspension of particles from the surface of burning plexiglas (polymethylmethacrylate) sheet can be up to 90% efficient (1)-. In nuclear laboratories in which plexiglas gloveboxes are contaminated with radioactive particles, an extensive transport of contamination can be expected in the event of a fire. It is thus of interest to understand the mechanism by which particles are resuspended. The resuspension mechanism was therefore investigated and was found to be due to the bursting of near surface bubbles of pyrolysis gas. Measurements of the temperature dependence of the bursting pressure and of the pyrolysis rate lead to the conclusion that particle resuspension is most efficient at temperatures of about 200 degrees C. Temperatures within the flame of even a small fire can exceed 500 degrees C so it follows that resuspension is most efficient near the flame front rather than at the centre of the fire.
Bibliographic Reference: 13TH ANNUAL CONFERENCE OF THE GESELLSCHAFT FUER AEROSOLFORSCHUNG GARMISCH-PARTENKIRCHEN (GERMANY), SEPT. 25-27, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32139 ORA
Availability: Can be ordered online
Record Number: 1989124041100 / Last updated on: 1987-01-01
Available languages: en