ISO proposal: Measurement of Fluid Flow Rate in Closed Conduits – Radioactive Tracer Methods


ISO proposal: Measurement of Fluid Flow Rate in Closed Conduits – Radioactive Tracer Methods

Jentsch, T.; Thereska, J.; Brisset, P.; Jin, J. H.; Yunos, M. A. S. M.; Masinza, S. A.; Affum, H. A.

Radioactive tracer methods are very competitive and sometimes unique for online measurement of flow rate in single phase flows flowing inside closed conduits. Radioactive tracer methods are already well accepted from industrial end users and established in routine service worldwide.

ISO standards are basic elements of quality control and accreditation for recognition and cooperation in national and international market. There have been proposed several ISO standards dealing with radioactive tracer methods for measurement of water and gas flows in closed conduits during last five decades:

ISO 2975/VII Measurement of water flow in closed conduits -Tracer methods: Transit time method using radioactive tracers
ISO 4053 Measurement of gas flow in conduits -Tracer methods

The ISO standards ISO2975 and ISO4053 issued in 1975-1977 addressed radioactive tracer methods respectively for water and gas flows. The ISO2975 is limited to water phase only, while ISO4053 dealt with gas phase, was withdrawn in 2001 leaving a void on this subject. The proposed ISO standard will replace both of them.

This ISO proposal defines the use of radioactive tracer methods in the measurement of single-phase fluid (gas or liquid) flows in closed conduits. This method of measurement is applicable only to single-phase homogeneous fluid mixtures. This ISO proposal is developed to fill the need for a generalized reference based on fundamental principles to measure fluid flow using radioactive tracer methods. It defines the terms and principles needed for intelligent consideration of radioactive tracer methods for any single-phase fluid flow flowing in closed circuits.

Experts from different countries – so called P member states of ISO TC30 SC5 – will discuss the ISO proposal, and finalize it as new international standard in this field in coming years.

Keywords: ISO standard; radioactive tracer; radiotracer; measurement; fluid flow rate; closed conduits

  • Lecture (Conference)
    NUTECH-2020, 04.-07.10.2020, Warszawa, Polska

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Publ.-Id: 30984