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IEC 62303:2008

(Main)

Radiation protection instrumentation - Equipment for monitoring airborne tritium

Radiation protection instrumentation - Equipment for monitoring airborne tritium

IEC 62303:2008 is applicable to equipment used for sampling and continuous measurement of tritium in the workplace, in gaseous effluents discharged into the environment as well as in the environment itself and it is applicable to installed, portable and transportable equipment. The object is to establish mandatory general requirements and to present examples of acceptable methods and equipment for continuously monitoring and/or sampling airborne tritium. Complements IEC 60761-5.

Instrumentation pour la radioprotection - Matériel pour la surveillance du tritium atmosphérique

La CEI 62303:2008 est applicable au matériel utilisé pour les mesures par prélèvement ou en continu du tritium sur les lieux de travail, dans les effluents gazeux rejetés dans l'environnement et dans l'environnement lui-même, et elle est applicable aux matériels installés, portables et transportables. L'objet est d'établir des exigences générales impératives et de présenter des exemples de méthodes acceptables et de matériels de surveillance en continu ou par prélèvement du tritium atmosphérique. Complète la norme CEI 60761-5.

General Information

Status
Published
Publication Date
10-Dec-2008
ICS
01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
13.280 - Radiation protection
Technical Committee
SC 45B - Radiation protection instrumentation
Drafting Committee
WG 13 - TC 45/SC 45B/WG 13
Current Stage
PPUB - Publication issued
Start Date
15-Jan-2009
Completion Date
11-Dec-2008
Ref Project

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IEC 62303:2008 - Radiation protection instrumentation - Equipment for monitoring airborne tritium
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IEC 62303
Edition 1.0 2008-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiation protection instrumentation – Equipment for monitoring airborne
tritium
Instrumentation pour la radioprotection – Matériel pour la surveillance du tritium
atmosphérique
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
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IEC 62303
Edition 1.0 2008-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiation protection instrumentation – Equipment for monitoring airborne
tritium
Instrumentation pour la radioprotection – Matériel pour la surveillance du tritium
atmosphérique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 13.280 ISBN 978-2-88910-666-0
– 2 – 62303 © IEC:2008
CONTENTS
FOREWORD.4
1 Scope and object.6
2 Normative references .6
3 Terms and definitions .7
4 Classification of tritium monitoring equipment.11
4.1 General design considerations .12
4.2 Methods of detection .12
4.3 Ease of decontamination .12
4.4 Considerations for explosive mixtures .12
4.5 Corrosion resistance .12
4.6 Reliability .12
4.7 Capability of operational testing .12
4.8 Adjustment and maintenance facilities.13
4.9 Acoustic noise level of the assembly .13
4.10 Electromagnetic interference .13
4.11 Mechanical shock.13
4.12 Measurement characteristics .13
4.13 Measurement range .13
5 Equipment components .14
5.1 General .14
5.2 Sampling assembly .14
5.3 Detection assembly .16
5.4 Control assembly.16
5.5 Indication facilities.17
5.6 Alarm assembly.17
5.7 Check source .18
5.8 Ambient background shielding or compensation devices .18
5.9 Batteries.18
6 Test conditions .18
6.1 General test procedures .18
6.2 Tests performed under standard test conditions for normal operation
condition .19
6.3 Tests performed with variation of influence quantities.19
6.4 Tests performed under test conditions for emergency conditions .19
6.5 Types of sources.19
6.6 Metrological confirmation system during tests .20
7 Radiation detection tests .20
7.1 General .20
7.2 Reference response .20
7.3 Linearity .21
7.4 Response to other chemical forms of tritium .21
7.5 Response to radioactive gases other than tritium .22
7.6 Response time .22
7.7 Response to ambient gamma radiation.22
7.8 Response to neutron radiation.23
7.9 Overload test.23

62303 © IEC:2008 – 3 –
7.10 Repeatability .24
7.11 Stability of background indication .24
7.12 Reproducibility of the indication.24
8 Electrical and mechanical tests .25
8.1 Alarm trip range .25
8.2 Alarm trip stability .25
8.3 Equipment fault alarms.25
8.4 Warm-up time — detection and measurement assembly.25
8.5 Power supply variations.26
8.6 Battery test.26
8.7 Power supply transient effects.27
9 Air circuit performance test.27
9.1 General .27
9.2 Susceptibility to gaseous retention .28
9.3 Accuracy of the volume and flow rate measurement .28
9.4 Flow rate stability .29
9.5 Effect of filter pressure drop .29
9.6 Effect of power supply voltage on the flow rate.30
9.7 Effect of power supply frequency on flow rate.30
10 Environmental performance tests .30
10.1 Ambient temperature .30
10.2 Temperature shock.31
10.3 Relative humidity.31
10.4 Atmospheric pressure.32
10.5 Sealing.32
10.6 Mechanical shock.32
10.7 External electromagnetic immunity and electrostatic discharge .33
10.8 Electromagnetic emission.33
11 Type test report and certificate .33
12 Operation and maintenance manual .34
Annex A (informative) General information on conditions of operation.40
Annex B (informative) Preparation of tritiated radioactive reference sources.43

Figure B.1 – Calibration loop .
...

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