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This report describes the work done to characterise aerosols from thermal cutting operations and to develop suitable ventilation and filtration techniques. The bimodal size distribution of aerosols from oxypropane cutting was confirmed. Trials on various prefilters showed that the electrostatic precipitator (ESP) and the cartridge filter had excellent collection properties. From these trials the ESP was selected as the prefilter for the Windscale advanced gas-cooled reactor (WAGR) decommissioning project. Details are given of the proposals to modify the ESP to enable the safe removal of radioactive dust and contaminated collector plates. Tests are described on aerosols generated by laser cutting and also trials on the ESP and high gradient magnetic separation prefilters. Finally, the measurement of filter burdens, aerosol concentrations and dust deposition rates from thermal cutting in a full-size ventilation rig are reported.

Additional information

Authors: BISHOP A, UK Atomic Energy Authority (UKAEA), Seascale, Cumbria CA20 1PF (GB)
Bibliographic Reference: EUR 12321 EN (1989) FS, 49 pp., ECU 5
Availability: (2)
ISBN: ISBN 92-826-0799-2; CD-NA
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