ISO INTERNATIONAL STANDARD 7503-3 Second edition 2016-01-15 Measurement of radioactivity Measurement and evaluation of surface contamination - Part 3: Apparatus calibration Mesurage de la radioactivité - Mesurage et évaluation de la contamination de surface- Partie 3: Etalonnage de I'appareillage Reference number ISO 7503-3:2016(E) SO International Organization for Standardization @ IS0 2016 vided by IHS under ted without license from IHS IS0 7503-3:2016(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 [email protected] www.iso.org Intenatinair PrganizationforStandardization icensee-ZHEJIANG INSTOF STANDARDIZAoISQ06- All rights reserved Not for Resale, 2016/3/29 02:59:06 etworking permitted without license from IHS IS0 7503-3:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms, definitions, symbols, and abbreviated terms ..2 3.1 Terms and definitions .2 3.2 Symbols and abbreviated terms. .2 4 Surface contamination evaluation methods .3 5 Principal direct calibration methodology including summation correction ..4 5.1 General .4 5.2 Calibration for radionuclides with single emission decay schemes ..4 5.3 P-factor for radionuclides with uncomplex decay schemes .6 5.4 P-factors for radionuclides with complex decay schemes. .7 5.5 Generic estimation of instrument response. .8 5.5.1 Determination oftheenergy response oftheinstrument .8 5.5.2 Modelling of the decay paths of the radionuclide of interest .9 5.5.3 Determination of the overall instrument response ..12 5.5.4 Alternativedeterminationoftheoverallinstrumentresponse .12 5.6 Conclusion. .12 6 Test report ..12 Annex A (normative) Alternative calibration methodology .14 Annex B (informative) Direct surface contamination evaluation: Numeric calibration examples..25 AnnexC(informative)Surfacecontaminationevaluationforradionuclidemixtures .37 Annex D (informative) Calibration for the indirect evaluation of surface contaminations ...40 Annex E (informative) Application of Is0 11929 for the direct evaluation of surface contaminations. ..44 Annex F (informative) Application of Is0 11929 for the indirect evaluation of surface contaminations ..55 Bibliography .63 iii HEJIANG INST OF STANDARDIZATION C1 5956617 lout license from IHS