Workreport 2010-37

Review of Element-Specific Data for Biosphere Assessment BSA-2009

Helin, J., Hjerpe, T. & Ikonen, A.T.K.

English

192

A literature review on distribution coefficients (Kd) to soil, sediment and suspended matter and on concentration ratios to forest, aquatic and crop plants and to edibles was performed and is documented in this report. The literature data were combined, in some cases involving also site-specific data, using the methods of Bayesian updating. Their application is also explained in the report. Based on the derived data, aggregated concentration ratios (production-weighted average concentration ratio to edibles specific to an ecosystem type) were calculated. Finally, the quality of the established data basis is evaluated.

The work provides the 2009 biosphere assessment of spent nuclear fuel disposal the in Olkiluoto site, BSA-2009, with the abovementioned parameter values and distributions, but most importantly demonstrates the methodology adopted to combine various data sources and derive such assessment data. It is acknowledged that for many parameters and/or elements the data basis needs improvement by the forthcoming 2012 assessment.

Biosphere, distribution coefficient (Kd), concentration ratio, aggregated concentration ratio, Bayesian updating

Review of Element-Specific Data for Biosphere Assessment BSA-2009 (pdf) (11.7 MB)