ISO INTERNATIONAL STANDARD 2889 Fourth edition 2023-07 Sampling airborne radioactive materials from the stacks and ducts of nuclear facilities Echantillonnage de substances radioactives en suspension dans I'air dans les émissaires de rejet et les conduits des installations nucleéaires Reference number IS0 2889:2023(E) ISO @IS02023 IS0 2889:2023(E) COPYRIGHT PROTECTED DOCUMENT IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org PublishedinSwitzerland i @ IS0 2023 - All rights reserved IS0 2889:2023(E) Contents Page Foreword .V Introduction .vi 1 Scope. .1 2 Normative references ..1 3 Terms and definitions 1 4 Symbols .10 5 Factors impacting the sampling program. ..14 6 Sample extraction locations .15 6.1 General. .15 6.2 General requirements for sample extraction locations .15 6.3 Criteria for the homogeneity of the air stream at sampling locations 16 6.3.1 General 16 6.3.2 Angular or cyclonic flow. 16 6.3.3 Air velocity profile. 16 6.3.4 Gas concentration profile 16 6.3.5 Particle concentration profile 16 6.3.6 Summary of recommendations for locations to extract samples from a well-mixedairstream 17 7 Sampling system design .17 7.1 General. 17 7.2 Volumetric flow measurement. .18 7.2.1 General 18 7.2.2 Emission stream flow measurement. 18 7.2.3 Sample air flow rate and volume measurement. 18 7.2.4 Leak checks.. 20 7.3 Nozzle design and operation for extracting aerosol particles 20 7.3.1 General 20 7.3.2 Nozzle performance 20 7.3.3 Application and performance considerations 21 7.3.4 Samplingprobeswithmultiple-inletnozzles 21 7.3.5 Materials of construction 22 7.3.6 Maintenance 22 7.3.7 New concepts. 22 7.4 Sample transport for particles 22 7.4.1 General 22 7.4.2 Depositional losses. 22 7.4.3 Corrosion. 23 7.4.4 Electrostatic effects and flexible tubes. 23 7.4.5 Smoothness of internal surfaces 24 7.4.6 Condensation 24 7.4.7 Cleaning transport lines 24 7.5 Gas and vapour sample extraction and transport 24 7.6 Collection of particle samples. 25 7.6.1 General 25 7.6.2 Filtermedia 25 7.7 Collection of gas and vapour samples 26 7.7.1 General 26 7.7.2 Sampling with retention of specific constituents 26 7.7.3 Sampling without constituent separation. 27 7.8 Evaluation and upgrading of existing systems. 27 7.9 Summary of performance criteria and recommendations 28 @ IS0 2023 - All rights reserved ii IS0 2889:2023(E) 8 Quality assurance and quality control .28 Annex A (informative) Techniques for measurement of flow rate through a stack or duct ..30 Annex B (informative) Modelling of particle losses in transport systems .35 Annex C (informative) Special considerations for the extraction, transport and sampling of radioiodine.. .45 Annex D (informative) Optimizing the selection of filters for sampling airborne radioactive particles. 50 Annex E (informative) Evaluating the errors and the uncertainty for the sampling of effluent gases. .55 Annex F (informative) Mixing demonstration and sampling system performance verification. .65 Annex G (informative) Transuranic aerosol particulate characteristics Implications for extractive sampling in nuclear facility effluents. ..73 Annex H (informative) Tritium sampling and detection ..77 Annex I (informative) Action levels ..80 Annex J (informative) Quality assurance ..87 Annex K (informative) Carbon-14 sampling and detection ..91 Annex L (informative) Factors impacting sampling system design ..94 Annex M (informative) Sampling nozzles and probes. .100 Annex N (informative) Stack or duct sampling and analysis for 106Ru .108 Bibliography 109 iv @ IS0 2023 - All rights reserved IS0 2889:2023(E) Foreword I