ISO INTERNATIONAL STANDARD 7503-1 Second edition 2016-01-15 Measurement of radioactivity Measurement and evaluation of surface contamination - Part 1: General principles Mesurage de la radioactivité - Mesurage et évaluation de la contamination de surface- Partie 1: Principes généraux Reference number ISO 7503-1:2016(E) SO International Organization for Standardization @ IS0 2016 vided by IHS under IS0 7503-1:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Intenatinair ganizationforStandardization ensee-ZHEJIANG INSTOF STANDARDIzARoISQ16- All rights reserved Not for Resale, 2016/3/29 02:58:50 etworking permitted without license from IHS IS0 7503-1:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references 3 Terms and definitions, symbols and abbreviations .2 3.1 Terms and definitions. .2 3.2 Symbols and abbreviated terms 4 Objectives of surface contamination measurements ..4 4.1 General. .4 4.2 National and international regulations. ..4 4.3 Definition of the measuring programme. 4 5 Direct and indirect methods of assessing surface contamination .5 5.1 General .5 5.2 Direct method. .6 5.3 Indirect method (wipetests) ..6 5.4 Wipe test uncertainties. ..6 6 Radionuclide identification and spectral analysis .6 7 Monitoring instruments .7 7.1 Selection of monitors 7 7.2 Introduction to the calibration of surface contamination instruments for direct measurement ..7 7.3 Tests before first use (TBFU) ..8 7.4 Periodic calibration. .9 7.5 Function check. .9 8 Estimation of surface contamination monitor response and calibration factors .9 8.1 General .9 8.2 Relationship between surface emission rate and activity ..10 9 Evaluation of measurement data. .12 10 Uncertainties .12 10.1 General .12 10.2 Assessment of uncertainty in the calibration factor ..12 10.3 Assessmentofuncertaintyinthemeasurement .13 10.4 Wipe test uncertainties. .14 11 Test report for a surface contamination instrument. ..14 Annex A (informative) Calibration of surface contamination instruments ..16 Annex B (informative) Example of surface contamination estimation ..21 Annex C (informative) Calibration of dose rate measuring instruments ..23 Bibliography .25 iii withoutlicense from IHS