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Traceability limit

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Fixed characteristic value based on statistical processes to evaluate the detection possibility for nuclear radiation measurements. The numerical value of the traceability limit indicates the smallest amount which can be detected with the measuring procedure concerned at a given error probability. This is the basis for the decision whether a measuring method meets certain requirements and is therefore suited for the given measuring purpose. See 'detection limit'. Examples for traceability limits to be achieved from the guideline for the environmental monitoring of nuclear power plants:

Gamma local dose:

0.1 mSv/year,

Aerosols*:

0.4 mBq/m3,

Precipitation*:

0.05 Bq/l,

Vegetation*:

0.5 Bq/kg,

Vegetable food*:

0.2 Bq/kg,

Vegetable food, Sr-90:

0.04 Bq/kg,

Milk, I-131:

0.01 Bq/l.

* activity of individual radionuclides, determined by gamma spectrometry, traceability limit related to Co-60

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