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BS ISO 24460:2023

BS ISO 24460:2023

$167.15

Measurement of fluid flow rate in closed conduits. Radioactive tracer methods

Published By Publication Date Number of Pages
BSI 2023 40
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principles of radioactive tracer methods
4.1 General
4.2 Transit time method
4.2.1 Principle
11 4.2.2 Special recommendation for the transit time method
4.2.3 Advantages of transit time method
4.3 Constant rate injection method
4.3.1 Principle
12 4.3.2 Duration of injection
13 4.3.3 Advantage of the constant rate injection method
14 4.4 Integration method
4.4.1 Principle
4.4.2 Advantages of the integration method
15 5 Choice of radioactive tracer
5.1 General
5.1.1 Requirements
5.1.2 Radioactive tracers
16 5.2 Advantages of radioactive tracers
5.3 Particular advantages of radionuclide generators
5.4 Selection of radioactive tracer
5.4.1 Type of emitted radiations
5.4.2 Half-life
17 6 Choice of adequate mixing length
6.1 General
6.2 Consideration on the mixing length
6.2.1 General
6.2.2 Examples of injection techniques for reducing mixing length
19 7 Detection of radioactive tracer
7.1 General
7.2 Gamma radiation detector
7.3 Detector arrangement
20 7.4 Data acquisition system
8 Procedures for applying radioactive tracer methods
8.1 Transit time method
8.1.1 Location of injection cross-section
21 8.1.2 Pulse injection of radioactive tracer
22 8.1.3 Estimation of the activity to be injected
23 8.1.4 Choice of measuring length
8.1.5 Calculation of transit time
24 8.2 Constant rate injection method
8.2.1 Preparation of the radioactive tracer to be injected
25 8.2.2 Injection of the radioactive tracer
8.2.3 Measurement of injection rate
8.3 Integration method
9 Uncertainty
9.1 General
9.1.1 ​Evaluation of uncertainty
26 9.1.2 Procedures for evaluating the uncertainty of a measured flow rate
9.1.3 Uncertainty propagation formula
9.2 Uncertainty of flow rate measured using the transit time method
27 9.3 Uncertainty of flow rate measured using the constant rate injection method
30 9.4 Uncertainty of flow rate measured using the integration method
32 Annex A (informative) Calculation of transit time and its standard uncertainty
38 Annex B (informative) Radiation dose considerations
39 Bibliography

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BS ISO 24460:2023
$167.15