EN ISO 11929-4:2023

Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation - Fundamentals and application - Part 4: Guidelines to applications (ISO 11929-4:2022)

Publication date:   Dec 14, 2023

General information

60.60 Standard published   Jul 19, 2023

CEN

CEN/TC 430 Nuclear energy, nuclear technologies, and radiological protection

European Norm

17.240   Radiation measurements

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Scope

This document specifies a procedure, in the field of ionizing radiation metrology, for the calculation of the “decision threshold”, the “detection limit” and the “limits of the coverage interval” for a non negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors.

ISO 11929-4 gives guidance to the application of ISO 11929 (all parts), summarizing shortly the general procedure and then presenting a wide range of numerical examples. The examples cover elementary applications according to ISO 11929-1 and ISO 11929-2.

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EN ISO 11929-4:2023
60.60 Standard published
Jul 19, 2023

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Adopted from ISO 11929-4:2022 IDENTICAL