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BSI 22/30404754 DC 2022

BSI 22/30404754 DC 2022

$13.70

BS ISO 24460. Measurement of fluid flow rate in closed conduits. Radioactive Tracer Methods

Published By Publication Date Number of Pages
BSI 2022 41
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PDF Catalog

PDF Pages PDF Title
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principles of radioactive tracer methods
4.1 Introduction
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 Dilution methods
4.3.1 Constant rate injection method
14 4.3.2 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 Advantages of radionuclide generators
17 5.4 Selection of radioactive tracer
5.4.1 Type of emitted radiations
5.4.2 Half-life
6 Choice of adequate mixing length
6.1 Introduction
6.2 Consideration on the mixing length
6.2.1 General
18 6.2.2 Examples of injection techniques for reducing mixing length
20 7 Detection of radioactive tracer
7.1 General
7.2 Gamma radiation detector
7.3 Detector arrangement
21 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
8.1.2 Pulse injection of radioactive tracer
23 8.1.3 Estimation of the activity to be injected
24 8.1.4 Choice of measuring length
8.1.5 Calculation of transit time
25 8.2 Constant rate injection method
8.2.1 Preparation of the radioactive tracer to be injected
26 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
27 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
29 9.3 Uncertainty of flow rate measured using the constant rate injection method
31 9.4 Uncertainty of flow rate measured using the integration method
34 Annex€A (normative) Calculation of transit time and its standard uncertainty
40 Annex€B (informative) Consideration on radiation dose
41 Bibliography

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BSI 22/30404754 DC 2022
$13.70