SIST EN 60793-1-54:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lichtwellenleiter -- Teil 1-54: Messmethoden und Prüfverfahren - Radioaktive StrahlungFibres optiques -- Partie 1-54: Méthodes de mesure et procédures d'essai - Irradiation gammaOptical fibres -- Part 1-54: Measurement methods and test procedures - Gamma irradiation33.180.10Fibres and cables17.240Merjenje sevanjaRadiation measurementsICS:Ta slovenski standard je istoveten z:EN 60793-1-54:2003SIST EN 60793-1-54:2004en01-september-2004SIST EN 60793-1-54:2004SLOVENSKI
STANDARD



SIST EN 60793-1-54:2004



EUROPEAN STANDARD
EN 60793-1-54 NORME EUROPÉENNE EUROPÄISCHE NORM
November 2003 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-1-54:2003 E
ICS 33.180.10
English version
Optical fibres Part 1-54: Measurement methods and test procedures -
Gamma irradiation (IEC 60793-1-54:2003)
Fibres optiques Partie 1-54: Méthodes de mesure
et procédures d'essai -
Irradiation gamma (CEI 60793-1-54:2003)
Lichtwellenleiter Teil 1-54: Messmethoden
und Prüfverfahren - Radioaktive Strahlung (IEC 60793-1-54:2003)
This European Standard was approved by CENELEC on 2003-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 60793-1-54:2004



EN 60793-1-54:2003 - 2 - Foreword
The text of document 86A/852/FDIS, future edition 1 of IEC 60793-1-54, prepared by SC 86A, Fibres et câbles, du CE 86 de la CEI, Fibres optiques, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60793-1-54 on 2003-09-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop) 2004-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2006-09-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. __________
Endorsement notice
The text of the International Standard IEC 60793-1-54:2003 was approved by CENELEC as a European Standard without any modification. __________
SIST EN 60793-1-54:2004



- 3 - EN 60793-1-54:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60793-1-40 2001 Optical fibres Part 1-40: Measurement methods and test procedures - Attenuation
EN 60793-1-40 2003 IEC 60793-1-44 2001 Part 1-44: Measurement methods and test procedures - Cut-off wavelength EN 60793-1-44 2002
SIST EN 60793-1-54:2004



SIST EN 60793-1-54:2004



NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD60793-1-54Première éditionFirst edition2003-06Fibres optiques –Partie 1-54:Méthodes de mesure et procédures d'essai –Irradiation gammaOptical fibres –Part 1-54:Measurement methods and test procedures –Gamma irradiationPour prix, voir catalogue en vigueurFor price, see current catalogue IEC 2003
Droits de reproduction réservés

Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niutilisée sous quelque forme que ce soit et par aucun procédé,électronique ou mécanique, y compris la photocopie et lesmicrofilms, sans l'accord écrit de l'éditeur.No part of this publication may be reproduced or utilized in anyform or by any means, electronic or mechanical, includingphotocopying and microfilm, without permission in writing fromthe publisher.International Electrotechnical Commission,
3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11
Telefax: +41 22 919 03 00
E-mail: inmail@iec.ch
Web: www.iec.chCODE PRIXPRICE CODEMCommission Electrotechnique InternationaleInternational Electrotechnical Commission
SIST EN 60793-1-54:2004



60793-1-54  IEC:2003– 3 –CONTENTSFOREWORD.5INTRODUCTION.91Scope.112Normative references.113Apparatus.133.1Radiation source.133.1.1Testing of environmental background radiation.133.1.2Testing of adverse nuclear environments.133.2Light source.133.3Optical filters/monochromators.133.4Cladding mode stripper.133.5Fibre support and positioning apparatus.133.6Optical splitter.133.7Input launch simulator.153.7.1Category A1 fibres (graded index multimode fibre).153.7.2Category B fibres (single-mode fibre).153.7.3Categories A2.1 and A2.2 (quasi-step and step index fibres).153.8Detector – Signal detection electronics.153.9Optical power meter.153.10Radiation dosimeter.153.11Temperature-controlled container.153.12Test reel.154Sampling and specimens.174.1Specimens.174.1.1Fibre specimen.174.1.2Cable specimen.174.2Specimen for environmental background radiation test.174.3Specimen for testing adverse nuclear environments.174.4Test reel.174.5Ambient light shielding.175Procedure.175.1Calibration of radiation source.175.2Preparation and conditionning.195.3Attenuation measurement for environmental background radiation.195.4Attenuation measurement for adverse nuclear environment.216Calculations.216.1The change in optical attenuation ∆A (environmental backgroundradiation test).216.2The change in optical transmittance, A (adverse nuclear environmentalradiation test).216.3Normalisation of the results.237Results.237.1Information to be provided with each measurement.237.2Information available upon request.238Specification information.25SIST EN 60793-1-54:2004



60793-1-54  IEC:2003– 5 –INTERNATIONAL ELECTROTECHNICAL COMMISSION____________OPTICAL FIBRES –Part 1-54: Measurement methods and test procedures –Gamma irradiationFOREWORD1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the InternationalOrganization for Standardization (ISO) in accordance with conditions determined by agreement between thetwo organizations.2)The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standards, technical specifications, technical reports or guides and they are accepted by the NationalCommittees in that sense.4)
In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5)
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.6)
Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.International Standard IEC 60793-1-54 has been prepared by subcommittee 86A: Fibres andcables, of IEC technical committee 86: Fibre optics.The text of this standard is based on the following documents:FDISReport on voting86A/852/FDIS86A/866/RVDFull information on the voting for the approval of this standard can be found in the report onvoting indicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directives, Part 2IEC 60793-1-5X consists of the following parts, under the general title Optical fibres:Part 1-50: Measurement methods and test procedures – Damp heat (steady state)Part 1-51: Measurement methods and test procedures – Dry heatPart 1-52: Measurement methods and test procedures – Change of temperaturePart 1-53: Measurement methods and test procedures – Water immersionPart 1-54: Measurement methods and test procedures – Gamma irradiationSIST EN 60793-1-54:2004



60793-1-54  IEC:2003– 7 –The committee has decided that the contents of this publication will remain unchanged until 2008.At this date, the publication will be•reconfirmed;•withdrawn;•replaced by a revised edition, or•amended.SIST EN 60793-1-54:2004



60793-1-54  IEC:2003– 9 –INTRODUCTIONPublications in the IEC 60793-1 series concern measurement methods and test proceduresas they apply to optical fibres.Within the same series several different areas are grouped, as follows:–parts 1-10 to 1-19:General–parts 1-20 to 1-29:Measurement methods and test procedures for dimensions–parts 1-30 to 1-39:Measurement methods and test procedures for mechanical characteristics–parts 1-40 to 1-49:Measurement methods and test procedures for transmission andoptical characteristics–parts 1-50 to 1-59:Measurement methods and test procedures for environmental characteristicsSIST EN 60793-1-54:2004



60793-1-54  IEC:2003– 11 –OPTICAL FIBRES –Part 1-54: Measurement methods and test procedures –Gamma irradiation1 ScopeThis part of IEC 60793 outlines a method for measuring the steady state response of opticalfibres and optical cables exposed to gamma radiation. It can be employed to determine thelevel of radiation-induced attenuation produced in single-mode or multimode optical fibres, ineither cabled or uncabled form, due to exposure to gamma radiation.The attenuation of cabled and uncabled optical fibres generally increases when exposed togamma radiation. This is primarily due to the trapping of radiolytic electrons and holes atdefect sites in the glass (i.e. the formation of “colour centers”). This test procedure focuses ontwo regimes of interest: the low dose rate regime suitable for estimating the effect ofenvironmental background radiation, and the high dose rate regime suitable for estimating theeffect of adverse nuclear environments. The testing of the effects of environmentalbackground radiation is achieved with an attenuation measurement approach similar tomethod IEC 60793-1-40A, cut-back. The effects of adverse nuclear environments are testedby monitoring the power before, during and after exposure of the test sample to gammaradiation. The depo
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