Community Research and Development Information Service - CORDIS

Abstract

During decommissioning activities of nuclear installations, large amounts of contaminated concrete will have to be processed. All this concerete has to be treated and stored as radioactive waste, which implies major economical and environmental consequences. It was shown that the contamination is mainly concentrated in the porous cementstone. By separating this cementstone from the clean dense aggregate particles, a considerable volume reduction can be reached. The clean aggregate can be reused in concrete. KEMA has developed, designed and constructed a pilot plant scale test installation for separation of aggregate from contaminated concrete. The separation is based on a thermal treatment followed by milling and sieving. After the optimization of the process, including dust control, the installation was approved by TÜV and transported to Germany for verification test with contaminated concrete from decommissioning activities at Versuchsatomkraftwerk Kahl. The process proved to be successful. It was calculated that a volume reduction of more than a factor of two can be reached. Depending on storage costs and amounts of concrete the process will be very economical.

Additional information

Authors: CORNELISSEN H A W, KEMA Nederland BV, Arnhem (NL)
Bibliographic Reference: EUR 16917 EN (1996) 18pp., FS, ECU 7.00
Availability: Available from the (2)
ISBN: ISBN 92-827-7744-8
Record Number: 199611101 / Last updated on: 1996-10-28
Category: PUBLICATION
Original language: en
Available languages: en