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ISO

ISO 23548

(Main)

Measurement of radioactivity — Alpha emitting radionuclides — Generic test method using alpha spectrometry

Measurement of radioactivity — Alpha emitting radionuclides — Generic test method using alpha spectrometry

Mesurage de la radioactivité — Radionucléides émetteurs alpha — Méthode d’essai générique par spectrométrie alpha

General Information

Status
Not Published
ICS
17.240 - Radiation measurements
Technical Committee
ISO/TC 85/SC 2 - Radiological protection
Drafting Committee
ISO/TC 85/SC 2/WG 17 - Radioactivity measurements
Current Stage
6000 - International Standard under publication
Completion Date
02-Jul-2024
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ISO/FDIS 23548 - Measurement of radioactivity — Alpha emitting radionuclides — Generic test method using alpha spectrometry Released:22. 04. 2024ISO/FDIS 23548 - Measurement of radioactivity — Alpha emitting radionuclides — Generic test method using alpha spectrometry Released:22. 04. 2024
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REDLINE ISO/FDIS 23548 - Measurement of radioactivity — Alpha emitting radionuclides — Generic test method using alpha spectrometry Released:22. 04. 2024REDLINE ISO/FDIS 23548 - Measurement of radioactivity — Alpha emitting radionuclides — Generic test method using alpha spectrometry Released:22. 04. 2024
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Standards Content (Sample)


FINAL DRAFT
International
Standard
ISO/FDIS 23548
ISO/TC 85/SC 2
Measurement of radioactivity —
Secretariat: AFNOR
Alpha emitting radionuclides —
Voting begins on:
Generic test method using alpha
2024-05-06
spectrometry
Voting terminates on:
2024-07-01
Mesurage de la radioactivité — Radionucléides émetteurs alpha
— Méthode d’essai générique par spectrométrie alpha
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 23548:2024(en) © ISO 2024

FINAL DRAFT
ISO/FDIS 23548:2024(en)
International
Standard
ISO/FDIS 23548
ISO/TC 85/SC 2
Measurement of radioactivity —
Secretariat: AFNOR
Alpha emitting radionuclides —
Voting begins on:
Generic test method using alpha
spectrometry
Voting terminates on:
Mesurage de la radioactivité — Radionucléides émetteurs alpha
— Méthode d’essai générique par spectrométrie alpha
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 23548:2024(en) © ISO 2024

ii
ISO/FDIS 23548:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and units. 3
5 Principle . 4
6 Chemical reagents and equipment . 5
6.1 General .5
6.2 Chemical reagents .5
6.2.1 Water quality .5
6.2.2 Tracer solution.5
6.3 Equipment .6
7 Sampling and samples . . 9
8 Procedure . 9
8.1 General .9
8.2 Calcination .10
8.3 Sample dissolution processes.10
8.4 Specific radiochemical separation procedures .11
8.5 Methods of deposition . 12
8.5.1 Direct deposition . 12
8.5.2 Spontaneous deposition of polonium. 12
8.5.3 Microprecipitation . 13
8.5.4 Electrodeposition . 13
8.6 Measurement .14
8.6.1 Measurement geometry .14
8.6.2 Spectrum exploitation .14
8.6.3 Energy calibration.16
8.6.4 Efficiency calibration .16
8.6.5 Global Background .17
8.6.6 Chemical yield and total efficiency .17
8.6.7 Quality control sources .18
8.7 Recommended nuclear decay data .18
9 Expression of results . 19
9.1 Calculation of activity .19
9.1.1 General .19
9.1.2 Alpha activity .19
9.1.3 Uncertainty .19
9.1.4 Decision threshold . 20
9.1.5 Detection limit . 20
9.2 Calculation of sample activity .21
9.2.1 General .21
9.2.2 Calculation of derived alpha activity.21
9.2.3 Relative uncertainty . .21
9.2.4 Decision threshold .21
9.2.5 Detection limit . 22
9.2.6 Coverage intervals limits . 22
10 Test report .23
Annex A (informative) Generic alpha test method processes .24
Annex B (informative) Examples of melting flux .25

iii
ISO/FDIS 23548:2024(en)
Annex C (informative) Preparation of the source by coprecipitation .26
Annex D (informative) Preparation of the source by electrodeposition .30
Annex E (informative) Alpha peak integration with minimized uncertainty.33
Bibliography .35

iv
ISO/FDIS 23548:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO take
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ISO /TC 85/SC 2/WG 17
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Secretariat: AFNOR .
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Date: 2024-03-29xx
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Measurement of radioactivity — Alpha emitting radionuclides —
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Generic test method using alpha spectrometry .
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St l D fi iti
ISO/FDIS 23548:2024(Een) Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Formatted: HeaderCentered, Space After: 0 pt, Line
spacing: single, Tab stops: Not at 17 cm
Formatted: Right: 1.5 cm, Bottom: 1 cm, Gutter: 0 cm,
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
Header distance from edge: 1.27 cm, Footer distance
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
from edge: 0.5 cm
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 of the requester. Commented [eXtyles1]: The reference "ISO 2024" is to a
withdrawn standard
ISO copyright office
Formatted: Default Paragraph Font
CP 401 • Ch. de Blandonnet 8
Formatted: Default Paragraph Font
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: French (France)
EmailE-mail: copyright@iso.org
Formatted: French (France)
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Published in Switzerland
Formatted: FooterPageRomanNumber
ii © ISO 2024 – All rights reserved
ii
ISO/FDIS 23548: 2024(en) Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Contents
Formatted: HeaderCentered, Left, Space After: 0 pt,
Line spacing: single, Tab stops: Not at 17.2 cm
Foreword . vi
Formatted: Adjust space between Latin and Asian text,
Introduction . vii Adjust space between Asian text and numbers
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and units . 4
5 Principle . 6
6 Chemical reagents and equipment . 7
6.1 General. 7
6.2 Chemical reagents . 7
6.2.1 Water quality . 7
6.2.2 Tracer solution . 7
6.3 Equipment . 8
7 Sampling and samples . 10
8 Procedure . 11
8.1 General. 11
8.2 Calcination . 12
8.3 Sample dissolution processes . 12
8.4 Specific radiochemical separation procedures. 13
8.5 Methods of deposition . 14
8.5.1 Direct deposition . 14
8.5.2 Spontaneous deposition of polonium . 15
8.5.3 Microprecipitation . 15
8.5.4 Electrodeposition. 16
8.6 Measurement . 16
8.6.1 Measurement geometry . 16
8.6.2 Spectrum exploitation . 17
8.6.3 Energy calibration . 18
8.6.4 Efficiency calibration . 18
8.6.5 Global Background . 20
8.6.6 Chemical yield and total efficiency . 20
8.6.7 Quality control sources . 21
8.7 Recommended nuclear decay data . 22
9 Expression of results . 22
9.1 Calculation of activity . 22
9.1.1 General. 22
9.1.2 Alpha activity . 22
9.1.3 Uncertainty. 23
9.1.4 Decision threshold . 24
9.1.5 Detection limit . 24 Formatted: Font: 10 pt
9.2 Calculation of sample activity . 25
Formatted: Font: 10 pt
9.2.1 General. 25
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9.2.2 Calculation of derived alpha activity . 25
9.2.3 Relative uncertainty . 26
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9.2.4 Decision threshold . 26
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9.2.5 Detection limit . 26
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9.2.6 Coverage intervals limits . 26
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© ISO 2024 – All rights reserved
iii
ISO/FDIS 23548:2024(Een) Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Formatted: HeaderCentered, Space After: 0 pt, Line
10 Test report . 27
spacing: single, Tab stops: Not at 17 cm
Annex A (informative) Generic alpha test method processes . 29
Annex B (informative) Examples of melting flux . 30
Annex C (informative) Preparation of the source by coprecipitation . 31
Annex D (informative) Preparation of the source by electrodeposition . 35
Annex E (informative) Alpha peak integration with minimized uncertainty . 38
Bibliography . 40

Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and units . 3
5 Principle . 4
6 Chemical reagents and equipment . 5
6.1 General. 5
6.2 Chemical reagents . 5
6.2.1 Water quality . 5
6.3 Equipment . 6
6.3.1 Detector . 6
6.3.2 Pipette . 7
6.3.3 Scale .
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