Community Research and Development Information Service - CORDIS

Abstract

Characterization of conditioned low and medium level waste is necessary for the safety evaluation of handling, storage and disposal of such materials. Because of its extensive use both as a matrix material for conditioning low and medium level radioactive waste and as an external barrier material, cement will have a profound influence on a systems complex water chemistry. Bitumen, which is also used extensively for conditioning, is being studied for the effect of water uptake on swelling or pressurisation of packages as well as bacterial degradation, which may influence release from this type of waste conditioning. Research is being carried out on the radiation damage which will occur in materials during storage and disposal: in particular the impact of radiation and temperature on cement based systems and other structural barriers with regard to changes of pH and redox potential. Various forms of leaching are being examined. Studies are being made of migration and retention in rock salt and in environments dominated by concrete. Models are being developed to simulate the behaviour of full-scale repositories over the long periods required in safety assessment. Development of non-destructive methods for measurement of the contents of alpha-emitters by active neutron interrogation and of the internal structure of full-scale waste units by tomography is also being carried out.

Additional information

Authors: SMITH D L, Taywood Engineering Ltd, Doe Radwaste Quality Checking Laboratory, AEE Winfrith, Dorchester, Dorset DT2 2DH (GB);GREEN T H, Taywood Engineering Ltd, Doe Radwaste Quality Checking Laboratory, AEE Winfrith, Dorchester, Dorset DT2 2DH (GB)
Bibliographic Reference: EUR 12077 EN (1989) FS, Volume 2, 218 pp., ECU 17.50
Availability: (2)
ISBN: ISBN 92-825-9990-6;CD-NB-
Record Number: 198910996 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en