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ILNAS-EN ISO 11929-4:2023 Edition 07/2023
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)
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Abstract

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.

Status

Standard - Active

Origin

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

Implementation

start of the vote on the project    23/03/2023   date of ratification (dor)    16/07/2023
end of the vote on the project    15/06/2023   date of anouncement (doa)    31/10/2023
start of the vote on the final project    27/11/2024   date of publication (dop)    31/01/2024
end of the vote on the final project    22/01/2025   date of withdrawal (dow)    31/01/2024


Publication Official Journal
of the Grand-Duchy of Luxembourg
15/01/2024
Reference Mémorial A N° 6

International Classification for Standards (ICS codes) :

17.240 : Radiation measurements

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