IEC 61577-4:2009

IEC 61577-4 ®
Edition 1.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiation protection instrumentation – Radon and radon decay product
measuring instruments –
Part 4: Equipment for the production of reference atmospheres containing radon
isotopes and their decay products (STAR)

Instrumentation pour la radioprotection – Instruments de mesure du radon et
des descendants du radon –
Partie 4: Dispositif pour la réalisation d’atmosphères de référence contenant des
isotopes du radon et leurs descendants (STAR)

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IEC 61577-4 ®
Edition 1.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiation protection instrumentation – Radon and radon decay product
measuring instruments –
Part 4: Equipment for the production of reference atmospheres containing
radon isotopes and their decay products (STAR)

Instrumentation pour la radioprotection – Instruments de mesure du radon et
des descendants du radon –
Partie 4: Dispositif pour la réalisation d’atmosphères de référence contenant
des isotopes du radon et leurs descendants (STAR)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 13.280 ISBN 978-2-88910-545-8
– 2 – 61577-4 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope and object.7
2 Normative references .7
3 Terms, definitions and units.8
3.1 General terms and definitions.8
3.2 Specific terms and definitions.9
3.3 Units and conversion factors .12
4 General description of a System for Test Atmospheres with Radon (STAR).13
4.1 General .13
4.2 Mode of operation of a STAR .14
4.2.1 Static mode of operation.14
4.2.2 Dynamic mode of operation .14
5 Characteristics of a STAR .15
5.1 General .15
5.2 STAR for radon .16
5.2.1 General .16
5.2.2 Technical characteristics of STAR containers .16
5.2.3 Radon sources .16
222 220
5.2.4 Rn and Rn analysis and control.17
5.2.5 Analysis and control of climatic parameters .18
5.3 STAR for radon and RnDP .18
5.3.1 General .18
5.3.2 Technical characteristics of STAR containers .18
5.3.3 RnDP sources .18
5.3.4 RnDP analysis and control.19
5.3.5 Sampling flow rate of equipment under test .19
5.3.6 Analysis and control of climatic parameters .20
6 Requirements for the reference atmosphere provided by STAR .20
6.1 General .20
6.2 Reference conditions.20
6.3 Influence quantities .21
6.3.1 General .21
6.3.2 Temperature.22
6.3.3 Relative humidity.22
6.3.4 Atmospheric pressure.22
6.3.5 Ambient gamma field .23
6.3.6 Working range for exposure to RnDP.23
6.3.7 Working range for aerosols.23
6.3.8 Exposure time for the instrument under test.23
7 Calibration and traceability of measurement methods and instruments used in a
STAR .23
7.1 Traceability chains .23
7.2 Quality assurance .24
Annex A (informative) Characteristics of atmospheres that can be simulated in a
STAR.25

61577-4 © IEC:2009 – 3 –
Bibliography.27

Figure 1 – Components of a STAR: general case.13
Figure 2 – Minimum requirements for a STAR.14
Figure 3 – Dynamic mode of operation of a STAR.15

Table 1 – Reference and standard test conditions.21
Table 2 – Tests with variation of the influence quantities .21
Table A.1 – Atmosphere characteristic ranges (typical values).26

– 4 – 61577-4 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RADIATION PROTECTION INSTRUMENTATION –
RADON AND RADON DECAY PRODUCT
MEASURING INSTRUMENTS –
Part 4: Equipment for the production of reference atmospheres
containing radon isotopes and their decay products (STAR)

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