THE REMEDIATION OF RADIOACTIVE CONTAMINATION AT THE LONDON 2012 OLYMPIC PARK
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration - 2016 Sept. 11-14


Presented at:
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration
2016 Sept. 11-14
Location:
Ottawa, Canada
Session Title:
Session W1: Site Remediation Experience

Authors:
L. Fellingham (Nuvia Limited)
J. Wright (Nuvia Limited)
M. Sliney (Magnox Limited)
I. Adsley (Nuvia Limited)
H. Beddow (Nuvia Limited)
  

Abstract

The London 2012 Olympic Park is in an area of Stratford, East London, which was once home to a diverse range of industries, such as chemical and fertilizer manufacturing, engineering works, metals processing, etc. Parts of the site were also formerly used as domestic and industrial waste landfills. Several of these industrial activities both on- and off-site used raw materials, which contained naturally occurring radionuclides. As a consequence the site had areas with radioactive contamination. This paper describes the remediation of the site from that contamination. It describes the identification, removal, assaying, management and disposal of the resulting radioactive wastes.

The contamination was in discrete areas and in parts several metres deep. Some included full natural uranium (U238) and thorium (Th232) chains, others truncated radium (Ra226) and truncated Pa231 chains. The gamma signature of the NORM, supported with sampling and analysis, was used with areal surveying to identify areas with elevated levels of radioactivity. The contaminated spoil was removed and transported to a central bunded, storage location. There the spoil was assayed and segregated by category by gamma spectrometry, using combinations of bag and calibrated bucket monitoring systems.

Approximately 7600 tonnes of radioactively contaminated spoil were identified. The bulk was very low level waste (VLLW). It was disposed of in a dedicated disposal cell, which was constructed on site in the southern abutment to a road and pedestrian bridge. A very small proportion, comprising primarily of individual artefacts, was low-level waste (LLW). This was disposed off-site.

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