BS EN ISO 11929-3:2021
Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation. Fundamentals and application Applications to unfolding methods
| Standard number: | BS EN ISO 11929-3:2021 |
| Pages: | 48 |
| Released: | 2021-02-23 |
| ISBN: | 978 0 539 14661 5 |
| Status: | Standard |
BS EN ISO 11929-3:2021
Determination of the Characteristic Limits for Measurements of Ionizing Radiation
Welcome to the comprehensive guide on the BS EN ISO 11929-3:2021 standard, a pivotal document for professionals dealing with ionizing radiation measurements. This standard is essential for ensuring accuracy and reliability in the determination of characteristic limits, including the decision threshold, detection limit, and limits of the coverage interval.
Overview
The BS EN ISO 11929-3:2021 standard provides a detailed framework for the determination of characteristic limits in the context of ionizing radiation measurements. Released on , this document is a crucial resource for scientists, engineers, and technicians who require precise and reliable measurement techniques in their work with ionizing radiation.
Key Features
- Standard Number: BS EN ISO 11929-3:2021
- Pages: 48
- ISBN: 978 0 539 14661 5
- Status: Standard
Content and Structure
This standard is meticulously structured to guide users through the fundamental principles and applications of determining characteristic limits. It covers:
- Decision Threshold: The minimum level at which a particular ionizing radiation can be confidently detected.
- Detection Limit: The lowest quantity of radiation that can be reliably measured under specified conditions.
- Limits of the Coverage Interval: The range within which the true value of the measured quantity is expected to lie with a certain probability.
Applications to Unfolding Methods
The standard also delves into the application of these principles to unfolding methods, which are critical in interpreting complex radiation spectra. This section is particularly beneficial for professionals involved in advanced radiation analysis and research.
Why Choose BS EN ISO 11929-3:2021?
Adopting the BS EN ISO 11929-3:2021 standard ensures that your measurements of ionizing radiation are conducted with the highest level of precision and reliability. This standard is indispensable for:
- Ensuring compliance with international measurement standards.
- Enhancing the accuracy of radiation detection and measurement processes.
- Supporting the development of new technologies and methodologies in radiation measurement.
Who Should Use This Standard?
This standard is designed for a wide range of professionals, including:
- Radiation safety officers and health physicists.
- Laboratory technicians and engineers working in nuclear facilities.
- Researchers and academics in the field of nuclear science and engineering.
- Quality assurance professionals in industries dealing with ionizing radiation.
Conclusion
The BS EN ISO 11929-3:2021 standard is a vital tool for anyone involved in the measurement and analysis of ionizing radiation. By providing a clear and comprehensive framework for determining characteristic limits, this standard helps ensure that your measurements are both accurate and reliable. Whether you are working in a laboratory, a nuclear facility, or conducting research, this standard is an essential resource for achieving excellence in radiation measurement.
Embrace the precision and reliability that the BS EN ISO 11929-3:2021 standard offers and elevate your work in the field of ionizing radiation measurements to new heights.
BS EN ISO 11929-3:2021
This standard BS EN ISO 11929-3:2021 Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation. Fundamentals and application is classified in these ICS categories:
- 17.240 Radiation measurements
The ISO 11929 series 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 has been divided into four parts covering elementary applications in ISO 11929‑1, advanced applications on the basis of the ISO/IEC Guide 98‑3‑1 in ISO 11929‑2, applications to unfolding methods in this document, and guidance to the application in ISO 11929‑4.
ISO 11929‑1 covers basic applications of counting measurements frequently used in the field of ionizing radiation metrology. It is restricted to applications for which the uncertainties can be evaluated on the basis of the ISO/IEC Guide 98‑3 (JCGM 2008). In Annex A of ISO 11929‑1:2019, the special case of repeated counting measurements with random influences is covered, while measurements with linear analogous ratemeters, are covered in Annex B of ISO 11929‑1:2019.
ISO 11929‑2 extends the former ISO 11929:2010 to the evaluation of measurement uncertainties according to the ISO/IEC Guide 98‑3‑1. ISO 11929‑2 also presents some explanatory notes regarding general aspects of counting measurements and on Bayesian statistics in measurements.
This document deals with the evaluation of measurements using unfolding methods and counting spectrometric multi-channel measurements if evaluated by unfolding methods, in particular, for alpha- and gamma‑spectrometric measurements. Further, it provides some advice on how to deal with correlations and covariances.
ISO 11929‑4 gives guidance to the application of the ISO 11929 series, summarizes shortly the general procedure and then presents a wide range of numerical examples.
ISO 11929 Standard also applies analogously to other measurements of any kind especially if a similar model of the evaluation is involved. Further practical examples can be found, for example, in ISO 18589[7], ISO 9696[2], ISO 9697[3], ISO 9698[4], ISO 10703[5], ISO 7503[1], ISO 28218[8], and ISO 11665[6].
NOTE A code system, named UncertRadio, is available for calculations according to ISO 11929‑ 1 to ISO 11929‑3. UncertRadio[35][36] can be downloaded for free from https://www.thuenen.de/en/fi/fields-of-activity/marine-environment/coordination-centre-of-radioactivity/uncertradio/. The download contains a setup installation file which copies all files and folders into a folder specified by the user. After installation one has to add information to the PATH of Windows as indicated by a pop‑up window during installation. English language can be chosen and extensive “help” information is available.