Title: Using RCLEA - the Radioactively Contaminated Land Exposure Assessment Methodology 
Resource Type: document --> guidance / decision support 
Country: United Kingdom 
Year: 2011 
Availability: CLR-13 Version 1.1 May 2011 
Author 1/Producer: Environment Agency 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Publisher: Defra 
Report / download web link (=direct link): http://www.environment-agency.gov.uk/static/documents/Busine ...  
Format (e.g. PDF): PDF 
EUGRIS Keyword(s): Brownfields
Contaminated land-->Contaminants-->Others
Contaminated land-->Risk assessment-->Exposure pathways
Contaminated land-->Risk assessment-->Models
Contaminated land-->Risk assessment-->Risk assessment overview
Contaminated land-->Risk assessment-->Tools and procedures
Contaminated land-->Risk assessment-->Toxicological information
Short description: Extract: RCLEA is Defra’s recommended approach for the exposure assessment of a site under the extended Part 2A regime for managing contaminated land. It complements the Contaminated Land Exposure Assessment (CLEA) approach for non-radioactive contamination. RCLEA is designed to support decision making under the extended regime; it may have wider applications but care is needed if the methodology is applied in other circumstances. The methodology is based on a set of mathematical models and data that calculate radiation doses from radionuclides in soil. These have been implemented as a software application in Microsoft Excel®, published by Defra as CLR 15, which is accompanied by a detailed technical report (CLR 14 – in preparation), and a more general summary and user guide (this report). Using measured concentrations of radionuclides, RCLEA calculates potential doses for comparison with regulatory criteria. It can also be used to calculate ‘Guideline Values’ in terms of radionuclide concentrations if reliable measurements are not yet available. In addition to specifying radionuclides present (and concentrations, if known), initial generic calculations simply provide the user with four basic options to select from: �� reference land uses (consistent with CLEA), including residential (with or without home-grown vegetables), allotments and commercial/industrial use; �� building type (timber framed or brick); �� age (adult, infant or child); and �� sex (male or female). 
Link to Organisation(s): Department for Environment, Food and Rural Affairs
Link to News Items(s):   UK: Defra Radioactively Contaminated Land Exposure Assessment Tool Published
Submitted By: Professor Paul Bardos WhoDoesWhat?      Last update: 23/06/2011

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