EN 62598-2013 en Nuclear instrumentation - Constructional requirements and classification of radiometric gauges.pdf

1、BSI Standards PublicationNuclear instrumentation Constructional requirements and classification of radiometric gaugesBS EN 62598:2013National forewordThis British Standard is the UK implementation of EN 62598:2013. It is identical to IEC 62598:2011. It supersedes BS EN 60405:2007 which is withdrawn.

2、The UK participation in its preparation was entrusted to TechnicalCommittee NCE/2, Radiation protection and measurement.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contr

3、act. Users are responsible for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013ISBN 978 0 580 79705 7ICS 27.120Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authorit

4、y of theStandards Policy and Strategy Committee on 31 August 2013.Amendments issued since publicationDate Text affectedBRITISH STANDARDBS EN 62598:2013EUROPEAN STANDARD EN 62598 NORME EUROPENNE EUROPISCHE NORM August 2013CENELEC European Committee for Electrotechnical StandardizationComit Europen de

5、 Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62598:2013 E ICS 27.120 Supersedes EN 6040

6、5:2007 English version Nuclear instrumentation - Constructional requirements and classification of radiometric gauges(IEC 62598:2011) Instrumentation nuclaire - Exigences de construction et classificationpour les jauges radiomtriques (CEI 62598:2011)Strahlungsmessgerte - Konstruktionsanforderungen u

7、ndKlassifikation radiometrischerMessanordnungen (IEC 62598:2011) This European Standard was approved by CENELEC on 2013-07-22. CENELEC members are bound to complywith the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standardthe status of a national standar

8、d without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained onapplication to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in a

9、ny otherlanguage made by translation under the responsibility of a CENELEC member into its own language and notifiedto the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia,

10、Cyprus,the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and t

11、he United Kingdom. BS EN 62598:2013EN 62598:2013 - 2 - Foreword This document (EN 62598:2013) consists of the text of IEC 62598:2011 prepared by IEC/TC 45 “Nuclearinstrumentation“. The following dates are fixed: latest date by which the document has to be implemented at national level bypublication

12、of an identical national standard or by endorsement (dop) 2014-07-22 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-07-22 This document supersedes EN 60405:2007. EN 62598:2013 includes the following significant technical changes with respect

13、 to EN 60405:2007: Introduction of Category C for stand-alone source housings intended for fixed radiometric gauges andassociated test procedures. The system classification code has been amended by one digit indicating the applied revision ofEN 62598 and by a second digit indicating the fire test co

14、nditions. The term dose rate class shall be used instead of radiation protection class. Class 7, or alternatively E,represents the current ICRP regulations. Introduction of fire resistance classes. Revision of the procedure for dose equivalent measurements. Addition of Annex A (informative) “Guideli

15、nes for the installation of radiometric gauges“. Attention is drawn to the possibility that some of the elements of this document may be the subject ofpatent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patentrights. Endorsement notice The text of the Inte

16、rnational Standard IEC 62598:2011 was approved by CENELEC as a EuropeanStandard without any modification. BS EN 62598:2013- 3 - EN 62598:2013 Annex ZA (normative) Normative references to international publicationswith their corresponding European publications The following documents, in whole or in

17、part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been

18、 modified by common modifications, indicated by (mod), the relevant EN/HDapplies. Year Publication EN/HD Title Year IEC 60050-394 2007 International Electrotechnical Vocabulary - Part 394: Nuclear instrumentation - Instruments, systems, equipment anddetectors - - IEC 60476 1993 Nuclear instrumentati

19、on - Electrical measuringsystems and instruments utilizing ionizingradiation sources - General aspects - - IEC 60692 1999 Nuclear instrumentation - Density gaugesutilizing ionizing radiation - Definitions and test methods - - IEC 60846-1 2009 Radiation protection instrumentation - Ambientand/or dire

20、ctional dose equivalent (rate)meters and/or monitors for beta, X andgamma radiation - Part 1: Portable workplace and environmentalmeters and monitors - - IEC 60846-2 2007 Radiation protection instrumentation - Ambientand/or directional dose equivalent (rate)meters and/or monitors for beta, X andgamm

21、a radiation - Part 2: High range beta and photon dose and dose rate portable instruments for emergencyradiation protection purposes - - IEC 60982 1989 Level measuring systems utilizing ionizingradiation with continuous or switching output - - IEC 61005 (mod) 2003 Radiation protection instrumentation

22、 - Neutron ambient dose equivalent (rate)meters EN 61005 2004 IEC 61010-1 + corr. May 20102011Safety requirements for electrical equipmentfor measurement, control and laboratory use -Part 1: General requirements EN 61010-1 2010 IEC 61326 Series Electrical equipment for measurement, control and labor

23、atory use - EMC requirements EN 61326 Series IEC 61336 1996 Nuclear instrumentation - Thicknessmeasurement systems utilizing ionizingradiation - Definitions and tests methods - - ISO 361 1975 Basic ionizing radiation symbol - - ISO 921 1997 Nuclear energy - Vocabulary - - BS EN 62598:2013EN 62598:20

24、13 - 4 - Publication Year Title EN/HD Year ISO 2919 1999 Radiation protection - Sealed radioactivesources - General requirements and classification - - BS EN 62598:2013 2 62598 IEC:2011(E) CONTENTS INTRODUCTION . 6 1 Scope and object . 7 2 Normative references . 7 3 Terms and definitions . 8 4 Class

25、ification of radiometric gauge types . 9 4.1 Category A: Radiometric gauges with restricted beam 9 4.2 Category B: Radiometric gauges with omnidirectional beam . 11 4.3 Category C: Stand alone source housings for fixed radiometric gauges . . 11 4.4 Dose rate classes 12 4.5 Temperature class . 12 5 G

26、eneral requirements . 13 5.1 Measuring gap . . 13 5.2 Source holder . . 13 5.3 Source housing . 13 5.4 Alignment of the useful beam . 13 5.5 Other requirements . . 13 6 Protection against ionizing radiation . . 14 6.1 General requirements . 14 6.2 Requirements for Category A gauges 14 6.3 Requiremen

27、ts for Category B gauges 14 6.4 Requirements for Category C stand alone source housings . 14 6.5 Resistance of the source housing in case of fire 15 6.6 Detector housing . 15 6.7 Measuring head . 15 7 Other safety devices . 15 7.1 General . . 15 7.2 Protection against non-authorized use . 15 7.3 Ind

28、ication of the shutter position . 16 7.4 Additional warning device . . 16 8 Determination of the dose equivalent rate . 16 8.1 General . . 16 8.2 Dose equivalent rate measurements in the case of closed shutters . 18 8.3 Dose equivalent rate measurements in the case of open shutters . . 18 8.4 Proced

29、ure for dose equivalent rate measurements . 18 8.5 Determining the relevant values of the dose equivalent rate . 19 9 Test methods . . 19 9.1 General . 19 9.2 Temperature cycle test on the shutters and the source holder . . 19 9.2.1 Requirements . 19 9.2.2 Procedure 19 9.3 Test for checking the resi

30、stance of the shutter, the source holder and the source container in case of fire . 20 9.3.1 Requirements . 20 9.3.2 Procedure 20 BS EN 62598:201362598 IEC:2011(E) 3 9.4 Test for checking the mechanical resistance of the shutter and the source holder 20 9.4.1 Requirements . 20 9.4.2 Procedure 21 10

31、System classification coding and labelling 21 10.1 Classification code . 21 10.2 Labelling . . 22 11 Accompanying documents . 22 Annex A (informative) Guidelines for the installation of radiometric gauges . . 23 Figure 1 Schematic arrangement of Category A gauges . 10 Figure 2 Schematic arrangement

32、of Category B gauges . 11 Figure 3 Category C stand alone source housing for fixed level or density gauges 11 Figure 4 Schematic representation of isodistance gauging faces in the case of thickness gauges 17 Figure 5 Schematic representation of isodistance gauging faces in the case of level and dens

33、ity gauges and back-scatter gauges . . 17 Figure 6 Schematic representation of isodistance gauging faces in the case of stand alone source housings . 18 Figure A.1 Examples of protection methods and principles . . 24 Table 1 Dose rate classes 12 Table 2 Temperature classes 12 Table 3 Fire resistance

34、 classes . 15 BS EN 62598:2013 6 62598 IEC:2011(E) INTRODUCTION This International Standard is based on the second edition of IEC 60405 which was published in 2003. It modifies or supplements it with additional provisions, where required by current needs. Compared to the second edition of IEC 60405,

35、 the following major changes have been made: Introduction of Category C for stand alone source housings intended for fixed radiometric gauges and associated test procedures. The system classification code has been amended by one digit indicating the applied revision of IEC 62598 and by a second digi

36、t indicating the fire test conditions. The term dose rate class shall be used instead of radiation protection class. Class 7, or alternatively E, represents the current ICRP regulations. Introduction of fire resistance classes. Revision of the procedure for dose equivalent measurements. Addition of

37、Annex A (informative) “Guidelines for the installation of radiometric gauges“. BS EN 62598:201362598 IEC:2011(E) 7 NUCLEAR INSTRUMENTATION CONSTRUCTIONAL REQUIREMENTS AND CLASSIFICATION OF RADIOMETRIC GAUGES 1 Scope and object This International Standard applies to the manufacture and installation o

38、f electrical measuring systems and instruments utilizing radioactive sources (radiometric gauges, hereinafter called gauges). It also applies to source housings intended for use in the aforementioned measuring systems. This standard applies to equipment, which is not related to power production or t

39、o the fuel cycle. It does not apply to portable gauges which, because of their construction and purposes for use, are intended to be operated as mobile equipment and it does not apply to gauges operated with X-ray tubes, but it can be analogously applicable to these gauges. The object of this standa

40、rd is to specify constructional requirements for the design of instruments utilizing radioactive sources in regard of radiation protection. This standard does not take into account mechanical or electrical hazards. 2 Normative references The following referenced documents are indispensable for the a

41、pplication of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-394:2007, International Electrotechnical Vocabulary (IEV) Part 394: Nuclear instrumentation Instrumen

42、ts, systems, equipment and detectors IEC 60476:1993, Nuclear instrumentation Electrical measuring systems and instruments utilizing ionizing radiation sources General aspects IEC 60692:1999, Nuclear instrumentation Density gauges utilizing ionizing radiation Definitions and test methods IEC 60846-1:

43、2009, Radiation protection instrumentation Ambient and/or directional dose equivalent (rate) meters and/or monitors for beta, X and gamma radiation Part 1: Portable workplace and environmental meters and monitors IEC 60846-2:2007, Radiation protection instrumentation Ambient and/or directional dose

44、equivalent (rate) meters and/or monitors for beta, X and gamma radiation Part 2: High range beta and photon dose and dose rate portable instruments for emergency radiation protection purposes IEC 60982:1989, Level measuring systems utilizing ionizing radiation with continuous or switching output IEC

45、 61005:2003, Radiation protection instrumentation Neutron ambient dose equivalent (rate) meters IEC 61010-1:2010, Safety requirements for electrical equipment for measurement, control and laboratory use Part 1: General requirements BS EN 62598:2013 8 62598 IEC:2011(E) IEC 61326 (all parts), Electric

46、al equipment for measurement, control and laboratory use EMC requirements IEC 61336:1996, Nuclear instrumentation Thickness measurement systems utilizing ionizing radiation Definitions and test methods ISO 361:1975, Basic ionizing radiation symbol ISO 921:1997, Nuclear energy Vocabulary ISO 2919:199

47、9, Radiation protection Sealed radioactive sources General requirements and classification 3 Terms and definitions For the purposes of this document, the terms and definitions as specified in ISO 921, IEC 60050-394 and IEC 60476, as well as the following apply. 3.1 collimation device device for rest

48、ricting the radiation in one or more directions 3.2 detector housing that portion of the measuring head that includes the detector NOTE This assembly may be incorporated with the source housing, especially in the case of a back-scatter measurement system. 3.3 measuring head subassembly comprising on

49、e or several radioactive sources and detectors along with compensation sensors, if necessary, and devices that can be used to measure and correct the effects of undesirable influences NOTE The measuring head may consist of separate source-housing and detector-housing subassemblies and it may include electronic devices for signal processing. 3.4 permanently installed radiometric gauge radiometric gauge that is permanently installed at the measuring location