scholarly journals Durable Concrete for a Waste Repository - Measurement of Ionic Ingress

1989 ◽  
Vol 176 ◽  
Author(s):  
R.F. Feldman ◽  
J.J. Beaudoin ◽  
K.E. Philipose
Keyword(s):  
Service Life ◽  
Radioactive Waste ◽  
Pore Structure ◽  
Research Program ◽  
Environmental Conditions ◽  
Low Level ◽  
Below Ground ◽  
Waste Repository ◽  
Low Level Radioactive Waste ◽  
Durability Of Concrete

ABSTRACTA waste repository for the below ground disposal of low level radioactive waste is planned at Chalk River Nuclear Laboratories. It relies greatly on the durability of concrete for the required 500 year service life. A research program to design durable concrete and predict its service life is in progress.The degradation of the concrete depends to a large extent on the rate of ingress of corrosive agents. Penetration of chloride and sulphate ions are particularly relevant. Twenty mix formulations were developed to create various types and qualities of concrete, and to study their behaviour in different site environmental conditions. A total of 1000 concrete specimens are being exposed at 20°C and 45°C to 25 different combinations of the corrosive agents including CO2. Procedures to measure the ionic profiles and to determine the factors controlling diffusion of the ions in the various concretes have been developed. Results of selected concrete systems exposed to chloride and sulphate solutions for 1 year are presented and discussed in terms of pore structure and permeability parameters of the concrete.

Anion Scavengers for Low-Level Radioactive Waste Repository Backfills

1998 ◽  
Vol 7 (2) ◽  
pp. 125-141 ◽  
Author(s):  
Steven D. Balsley ◽  
Patrick V. Brady ◽  
James L. Krumhansl ◽  
Howard L. Anderson
Keyword(s):  
Radioactive Waste ◽  
Radioactive Waste Repository ◽  
Low Level ◽  
Waste Repository ◽  
Low Level Radioactive Waste

The biogeochemical behaviour of U(VI) in the simulated near-field of a low-level radioactive waste repository

2006 ◽  
Vol 21 (9) ◽  
pp. 1539-1550 ◽  
Author(s):  
James R. Fox ◽  
Robert J.G. Mortimer ◽  
Gavin Lear ◽  
Jonathan R. Lloyd ◽  
Ian Beadle ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Near Field ◽  
Radioactive Waste Repository ◽  
Low Level ◽  
Waste Repository ◽  
Low Level Radioactive Waste

The Role of the National Low Level Waste Repository Operator in Delivering New Solutions for the Management of Low Level Wastes in the UK

2009 ◽  
Author(s):  
Martin Walkingshaw
Keyword(s):  
Radioactive Waste ◽  
Alternative Treatment ◽  
Parent Body ◽  
Low Level ◽  
The United Kingdom ◽  
Waste Repository ◽  
The Uk ◽  
The Village ◽  
Low Level Radioactive Waste

The UK National Low Level Waste Repository (LLWR) is located near to the village of Drigg in West Cumbria. It is the principal site for disposal of solid Low Level Radioactive Waste (LLW) in the United Kingdom. This paper describes the program of work currently being undertaken by the site’s operators, (LLW Repository Ltd and its newly appointed Parent Body Organisation), to extend the life of the LLWR and reduce the overall cost of LLW management to the UK taxpayer. The current focus of this program is to prevent disposal capacity being taken up at LLWR by waste types which lend themselves to alternative treatment and/or disposition routes. The chosen approach enables consignors to segregate LLW at source into formats which allow further treatment for volume reduction or, (for wastes with lower levels of activity), consignment in the future to alternative disposal facilities. Segregated waste services are incorporated into LLW Disposal commercial agreements between the LLWR operator and waste consignors.

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