Uncertainties in monitoring data and methods to reduce uncertainties.
|Monitoring method||Source of uncertainty||Type of uncertainty||Assessment of typical uncertainty||Reduction method|
|Stationary dose rate monitoring||Probe characteristics||Stochastic and systematic||Low, ∼15%|
|Site characteristics||Systematic||High, factor of 2–3||Site characterisation|
|Mobile dose rate monitoring||Probe characteristics||Stochastic and systematic||Low, ∼15%|
|Vehicle characteristics||Systematic||Moderate, up to a factor of 2||Vehicle characterisation|
|Site/region characteristics||Systematic||High, factor of 2–3||Increased density of measurement points|
|Monitoring of airborne radioactivity||Sample measurement||Stochastic and systematic||Low, ∼5%|
|131I speciation||Systematic||High, up to factor of 4.5||Dedicated collection using activated carbon|
|Sampler characteristics||Systematic||Low, factor of 1.1|
|Monitoring of fallout||Sample measurement||Stochastic and systematic||Low, ∼5%|
|Deposition surface characteristics||Systematic||High, factor of 0.25–4|
|Spatial interpolation||Site/region characteristics and the distribution of deposited activity||High||Increased density of measurement points|
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