International ISO Standard IS024434 First edition Radiological protection - Radiological monitoring for 2024-01 emergency workers and population following nuclear/radiological incidents General principles Radioprotection Surveillance radiologique des intervenants en situation d'urgence et de la population apres des incidents nucléaires/radiologiques Principes généraux Reference number IS0 24434:2024(en) @ ISO 2024 IS0 24434:2024(en) COPYRIGHT PROTECTED DOCUMENT @IS02024 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or Iso's member body in the country ofthe requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @IS02024-Allrightsreserved i IS0 24434:2024(en) Contents Page Foreword. .vi Introduction. .vii 1 Scope. .1 2 Normative references 2 3 Terms and definitions .2 4 Symbols and abbreviated terms. 10 4.1 Symbols.. .10 4.2 Abbreviated terms. .11 5 Collecting Information about the incident 12 5.1 General 12 5.2 Description of the incident. 12 5.3 Source term identification and magnitude. 13 5.4 Weather conditions and modelling results 13 5.5 Potential exposure pathways.. 14 5.6 Affected population and demographic information .14 6 Organizing and managing a population screening centre. 14 6.1 Selecting the site. .14 6.1.1 General considerations .14 6.2 Staffing and organization.. .16 6.2.1 General .16 6.2.2 Modules of a population screening centre. .17 6.3 Scalability and sustainability .18 6.4 Practicalconsiderations 18 6.5 Population with special needs. .19 6.5.1 Main considerations.. 19 6.5.2 Other considerations. .19 6.6 Services (medical and psychological, security and safety, communication, transportation) 19 6.6.1 Medical 19 6.6.2 Mental health (psychosocial) 20 6.6.3 Security and safety. 20 7 Screening and monitoring for potential external contamination 21 7.1 Purpose. .21 7.2 Radiation detection equipment. .21 7.3 Contamination screening during initial sorting. 22 7.4 Contamination screening station 22 7.4.1 General 22 7.4.2 Contamination screening station location 22 7.4.3 Contamination screening station staffing 22 7.4.4 Contamination screening station personal protective equipment (PPE) 22 7.5 Decontamination station. 23 7.5.1 General 23 7.5.2 Decontamination station location 23 7.5.3 Decontamination station staffing[5] 23 7.5.4 Decontamination station personal protective equipment. 23 7.5.5 Clothing and personal belongings 23 7.5.6 Partial-body decontamination. .24 7.6 Post-decontamination screening 24 7.6.1 General 24 7.6.2 Factors affecting the criteria for determining if decontamination is warranted .24 8 Assessing and monitoring internal exposure 25 8.1 Overview.. 25 @ IS0 2024 - All rights reserved iii IS0 24434:2024(en) 8.2 Sample collection. 25 8.3 Monitoring for potential internal contamination. 25 8.3.1 General 25 8.3.2 Monitoring for radionuclides emitting predominantly non-penetrating radiation 26 8.3.3 Penetrating radiation .27 8.3.4 Radionuclide mixture 27 8.4 Method for dose assessment. 28 8.4.1 General 28 8.4.2 Initial dose assessment. 29 8.4.3 Detailed internal dose assessment. 30 9 Assessing and monitoring external exposure 30 9.1 General 30 9.2 Assessing external exposure. .31 9.2.1 Subjects. 31 9.2.2 Guidance 31 9.2.3 Measurement devices 31 9.3 Assessing external exposure for workers .33 9.3.1 Subjects. 33 9.3.2 Procedure 33 9.3.3 Measurements 33 9.3.4 Calculations.. 34 9.3.5 Assessment 35 9.4 Assessing external exposure for emergency workers 36 9.4.1 Subjects 36 9.4.2 Guidance 36 9.4.3 Measurements 37 9.4.4 Calculations. .37 9.4.5 A