SIST EN 62533:2016
(Main)Radiation protection instrumentation - Highly sensitive hand-held instruments for photon detection of radioactive material
Radiation protection instrumentation - Highly sensitive hand-held instruments for photon detection of radioactive material
This International Standard applies to hand-held instruments used for the detection and
localization of radioactive photon emitting materials. These instruments are highly sensitive
meaning that they are designed to detect slight variations in the range of usual photon
background caused mainly by illicit trafficking or inadvertent movement of radioactive
material. Compared to pocket devices (see IEC 62401), this highly sensitive instrument allows
the scanning of larger volume items such as vehicles or containers. They may also be used in
fixed or temporarily fixed unattended mode to monitor check points or critical areas.
These instruments also provide an indication of the ambient dose equivalent rate from photon
radiation. However, this standard does not apply to the performance of radiation protection
instrumentation which is covered in IEC 60846-1 and IEC 61526.
These instruments may provide additional functions as described below without including all
features of specialized portable identification devices as defined by IEC 62327:
• rejecting natural background variation encountered when used in movement;
• sorting alarms of interest from naturally occurring radioactive material (NORM) or medical
radionuclides originated alarms;
• provide source categorization data (including limited photon spectra) to a remote location.
The object of this standard is to establish performance requirements including physical
characteristics, general test conditions, radiation characteristics, electrical safety, and
environmental conditions. This standard provides examples of acceptable test methods to
determine if an instrument meets the requirements of this standard. The results of tests
performed provide information to users on the capability of radiation detection instruments for
reliably detecting photon sources.
Obtaining operating performance that meets or exceeds the specifications as stated in this
standard depends upon properly establishing appropriate operating parameters, maintaining
calibration, implementing a suitable response testing and maintenance program, providing
proper training for operating personnel and developing operating procedures that address the
instrument limitations and capabilities.
Strahlenschutz-Messgeräte - Hochempfindliche Handgeräte zur Detektion von Photonenstrahlung emittierendem radioaktivem Material
Instrumentation pour la radioprotection - Instruments portables de haute sensibilité pour la détection photonique de matières radioactives
La présente Norme internationale s'applique aux instruments portables utilisés pour la détection et la localisation des substances radioactives émettant des photons. Ces instruments sont très sensibles, ce qui signifie qu'ils sont conçus pour détecter de faibles variations dans le domaine du bruit de fond photonique habituel, qui peuvent avoir pour origine principale un transport illicite ou des mouvements involontaires de substances radioactives. En comparaison avec les dispositifs de poche (voir la CEI 62401), ces instruments à haute sensibilité permettent le balayage d'objets de plus grand volume tels que des véhicules ou des conteneurs. Ces instruments peuvent aussi être utilisés de manière fixe ou temporairement fixe pour surveiller des points de contrôle ou des emplacements critiques.
Ces instruments fournissent aussi une indication du débit d’équivalent de dose ambiant d'un rayonnement photonique. Cependant, la présente norme ne s'applique pas aux performances de l'instrumentation de radioprotection, qui est couverte par les CEI 60846-1 et CEI 61526.
Ces instruments peuvent fournir des fonctions supplémentaires telles que décrites ci-dessous, sans posséder toutes les caractéristiques des dispositifs d'identification portables et spécialisés, tels que définis dans la CEI 62327:
– élimination des variations du bruit de fond naturel, rencontrées lors d'une utilisation pendant un déplacement;
– discrimination des alarmes selon leur intérêt, entre alarmes provoquées par une matière radioactive présente dans la nature (NORM, en anglais naturally occurring radioactive material), ou alarmes provoquées par un radionucléide d'origine médicale;
– fourniture de données de catégorisation de source (y compris des spectres photoniques limités) à un emplacement éloigné.
L'objet de la présente norme est d'établir des exigences d'aptitude à la fonction incluant les caractéristiques physiques, les conditions générales d'essai, les caractéristiques de rayonnement, les caractéristiques de sécurité électrique et les conditions environnementales. La présente norme fournit des exemples de méthodes d'essai acceptables, permettant de déterminer si un instrument est conforme aux exigences de la présente norme. Les résultats des essais donnent des informations aux utilisateurs sur l'aptitude des instruments de détection de rayonnement à détecter de manière fiable des sources photoniques.
L'obtention de performances opérationnelles qui répondent ou dépassent les spécifications établies dans la présente norme dépend de l'établissement correct des paramètres opérationnels appropriés, d'un étalonnage maintenu, de la mise en œuvre d'un programme adéquat d'essai de réponse et d'un programme de maintenance, de la formation pertinente des opérateurs et du développement de procédures opératoires établissant les limitations et l'aptitude de l'instrument.
Oprema za varstvo pred sevanjem - Zelo občutljivi ročni instrumenti za zaznavanje fotonskega sevanja radioaktivnega materiala
Ta mednarodni standard velja za ročne instrumente za zaznavanje in lokalizacijo materialov, ki oddajajo nevtronsko sevanje. Ti instrumenti so visoko občutljivi, kar pomeni, da so namenjeni zaznavanju rahlih variacij v razponu običajnega stanja, ki jih večinoma povzroči ilegalni promet ali nenameren premik radioaktivnega materiala. V primerjavi z žepnimi napravami (glej IEC 62401) ta zelo občutljivi instrument omogoča skeniranje predmetov večjega obsega, kot so vozila ali zabojniki. Te instrumente se lahko uporabi tudi tako, da se jih pritrdi ali začasno pritrdi za namen spremljanja kontrolnih točk ali kritičnih območij brez nadzora osebja.
Ti instrumenti upoštevajo tudi stopnjo okoljsko ekvivalentnih odmerkov fotonskega sevanja. Vendar pa ta standard ne velja za učinkovitost instrumentov zaščite pred sevanji, ki je zajeta v standardih IEC 60846-1 in IEC 61526.
Ti instrumenti lahko zagotovijo dodatne funkcije, kot je opisano spodaj, pri čemer ne vključujejo vseh funkcij specializiranih prenosnih naprav, kot določa standard IEC 62327:
• zavrnitev naravnih sprememb ozadja, s katerimi se srečujejo pri uporabi v gibanju;
• razvrščanje alarmov, ki nastanejo zaradi naravno prisotnega radioaktivnega materiala (NORM) ali alarmov, ki izvirajo iz medicinskih radionuklidov;
• zagotavljanje podatkov za kategorizacijo virov (vključno z omejenimi spektri fotonov) na oddaljeni lokaciji.
Cilj tega standarda je določiti zahteve glede učinkovitosti, vključno s fizikalnimi lastnostmi, splošnimi pogoji preskušanja, značilnostmi sevanja, električno varnostjo in okoljskimi pogoji. Ta standard določa primere sprejemljivih preskusnih metod za ugotavljanje, ali instrument ustreza zahtevam tega standarda. Rezultati opravljenih preskusov zagotovijo uporabnikom informacije o zmogljivosti instrumentov za odkrivanje sevanja, s katerimi zanesljivo odkrivajo vire fotonov.
Zmogljivost delovanja, ki dosega ali presega specifikacije, kot je navedeno v tem standardu, je odvisna od pravilne nastavitve ustreznih delovnih parametrov, rednega umerjanja, izvajanja ustreznega odzivnega preskušanja in programa vzdrževanja, ustreznega usposabljanja osebja in razvoja delovnih postopkov, ki upoštevajo omejitve in zmogljivosti instrumentov.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 62533:2016
01-april-2016
2SUHPD]DYDUVWYRSUHGVHYDQMHP=HORREþXWOMLYLURþQLLQVWUXPHQWL]D]D]QDYDQMH
IRWRQVNHJDVHYDQMDUDGLRDNWLYQHJDPDWHULDOD
Radiation protection instrumentation - Highly sensitive hand-held instruments for photon
detection of radioactive material
Strahlenschutz-Messgeräte - Hochempfindliche Handgeräte zur Detektion von
Photonenstrahlung emittierendem radioaktivem Material
Instrumentation pour la radioprotection - Instruments portables de haute sensibilité pour
la détection photonique de matières radioactives
Ta slovenski standard je istoveten z: EN 62533:2016
ICS:
13.280 Varstvo pred sevanjem Radiation protection
SIST EN 62533:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 62533:2016
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SIST EN 62533:2016
EUROPEAN STANDARD EN 62533
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2016
ICS 13.280
English Version
Radiation protection instrumentation - Highly sensitive hand-held
instruments for photon detection of radioactive material
(IEC 62533:2010 , modified)
Instrumentation pour la radioprotection - Instruments Strahlenschutz-Messgeräte - Hochempfindliche Handgeräte
portables de haute sensibilité pour la détection photonique zur Detektion von Photonenstrahlung emittierendem
de matières radioactives radioaktivem Material
(IEC 62533:2010 , modifiée) (IEC 62533:2010 , modifiziert)
This European Standard was approved by CENELEC on 2015-12-28. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, 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 the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62533:2016 E
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SIST EN 62533:2016
EN 62533:2016
European foreword
This document (EN 62533:2016) consists of the text of IEC 62533:2010 prepared by SC 45B
"Radiation protection instrumentation" of IEC/TC 45 "Nuclear instrumentation", together with the
common modifications prepared by CLC/TC 45B "Radiation protection instrumentation".
The following dates are fixed:
(dop) 2016-12-28
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-12-28
• latest date by which the national standards conflicting with
the document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
2
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SIST EN 62533:2016
EN 62533:2016
Endorsement notice
The text of the International Standard IEC 62533:2010 was approved by CENELEC as a European
Standard with agreed common modifications.
COMMON MODIFICATIONS
Modification to 8.6.3.2 Test method
Add the following after the first paragraph:
Instead of Cs-137, an alternate source (e.g. Ba-133 or NORM) may be used in case the required
activity of Cs-137 cannot be transported to or handled at the site of RF measurement due to legal
national restrictions.
3
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SIST EN 62533:2016
EN 62533:2016
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in 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 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-393 2003 International Electrotechnical Vocabulary - - -
Part 393: Nuclear instrumentation -
Physical phenomena and basic concepts
IEC 60050-394 2007 International Electrotechnical Vocabulary - - -
Part 394: Nuclear instrumentation -
Instruments, systems, equipment and
detectors
IEC 60068-2-75 1997 Environmental testing - EN 60068-2-75 1997
Part 2-75: Tests - Test Eh: Hammer tests
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- - + corrigendum May 1993
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-6 2008 Electromagnetic compatibility (EMC) - EN 61000-4-6 2009
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
ISO 4037-1 1996 X and gamma reference radiation for - -
calibrating dosemeters and doserate
meters and for determining their response
as a function of photon energy -
Part 1: Radiation characteristics and
production methods
4
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EN 62533:2016
Publication Year Title EN/HD Year
ISO 4037-2 1997 X and gamma reference radiation for - -
calibrating dosemeters and doserate
meters and for determining their response
as a function of photon energy -
Part 2: Dosimetry for radiation protection
over the energy ranges from 8 keV to
1,3 MeV and 4 MeV to 9 MeV
ISO 4037-3 1999 X and gamma reference radiation for - -
calibrating dosemeters and doserate
meters and for determining their response
as a function of photon energy -
Part 3: Calibration of area and personal
dosemeters and the measurement of their
response as a function of energy and angle
of incidence
5
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SIST EN 62533:2016
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SIST EN 62533:2016
IEC 62533
®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiation protection instrumentation – Highly sensitive hand-held instruments
for photon detection of radioactive material
Instrumentation pour la radioprotection – Instruments portables de haute
sensibilité pour la détection photonique de matières radioactives
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 13.280 ISBN 978-2-88912-003-1
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 62533:2016
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CONTENTS
FOREWORD.4
1 Scope and object.6
2 Normative references .6
3 Terms, definitions, abbreviations, quantities and units .7
3.1 Terms and definitions .7
3.2 Abbreviations .10
3.3 Quantities and units .10
4 General requirements .11
4.1 General characteristics.11
4.2 Physical configuration .11
4.3 Basic information.11
4.4 Communication interface .11
4.5 User interface.11
4.6 Warm-up time.12
4.7 Markings .12
4.8 Power supply.12
4.9 Protection of controls .13
4.10 Photon ambient dose equivalent rate indication.13
4.11 Alarms.13
4.12 Effective range of measurement .13
4.13 Angular dependence .13
4.14 Explosive atmospheres .13
4.15 Indication features.13
5 General test procedure.14
5.1 Nature of test .14
5.2 Reference conditions and standard test conditions .14
5.3 Reference gamma radiation background.14
5.4 Statistical fluctuations .15
6 Radiation tests .15
6.1 Rate of false alarms (source indication).15
6.2 Source alarm and response time .15
6.3 Personal protection alarm and response time .16
6.4 Ambient dose equivalent rate indication .16
6.5 Over range characteristics for ambient dose equivalent rate indication.16
7 Additional functions .17
7.1 General .17
7.2 Rejecting natural background variation encountered when used in movement .17
7.3 Source categorization.17
8 Environmental, mechanical and electrical performance requirements .18
8.1 Temperature tests .18
8.2 Humidity tests .19
8.3 Dust and moisture resistance tests.19
8.4 Mechanical tests .20
8.5 Impact (microphonics) tests.21
8.6 Electrical tests.22
8.7 Radiated emissions .23
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62533 © IEC:2010 – 3 –
8.8 Conducted disturbances .24
8.9 Magnetic fields .24
9 Documentation .25
9.1 General .25
9.2 Type test report.25
9.3 Certificate .25
9.4 Operation and maintenance manual .25
Bibliography.26
Table 1 – Reference conditions and standard test conditions .14
Table 2 – Radiated RF emission limits .24
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SIST EN 62533:2016
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RADIATION PROTECTION INSTRUMENTATION –
HIGHLY SENSITIVE HAND-HELD INSTRUMENTS
FOR PHOTON DETECTION OF RADIOACTIVE MATERIAL
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62533 has been prepared by subcommittee 45B: Radiation
protection instrumentation, of IEC technical committee 45: Nuclear instrumentation.
The text of this standard is based on the following documents:
FDIS Report on voting
45B/640/FDIS 45B/654/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
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SIST EN 62533:2016
62533 © IEC:2010 – 5 –
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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RADIATION PROTECTION INSTRUMENTATION –
HIGHLY SENSITIVE HAND-HELD INSTRUMENTS
FOR PHOTON DETECTION OF RADIOACTIVE MATERIAL
1 Scope and object
This International Standard applies to hand-held instruments used for the detection and
localization of radioactive photon emitting materials. These instruments are highly sensitive
meaning that they are designed to detect slight variations in the range of usual photon
background caused mainly by illicit trafficking or inadvertent movement of radioactive
material. Compared to pocket devices (see IEC 62401), this highly sensitive instrument allows
the scanning of larger volume items such as vehicles or containers. They may also be used in
fixed or temporarily fixed unattended mode to monitor check points or critical areas.
These instruments also provide an indication of the ambient dose equivalent rate from photon
radiation. However, this standard does not apply to the performance of radiation protection
instrumentation which is covered in IEC 60846-1 and IEC 61526.
These instruments may provide additional functions as described below without including all
features of specialized portable identification devices as defined by IEC 62327:
• rejecting natural background variation encountered when used in movement;
• sorting alarms of interest from naturally occurring radioactive material (NORM) or medical
radionuclides originated alarms;
• provide source categorization data (including limited photon spectra) to a remote location.
The object of this standard is to establish performance requirements including physical
characteristics, general test conditions, radiation characteristics, electrical safety, and
environmental conditions. This standard provides examples of acceptable test methods to
determine if an instrument meets the requirements of this standard. The results of tests
performed provide information to users on the capability of radiation detection instruments for
reliably detecting photon sources.
Obtaining operating performance that meets or exceeds the specifications as stated in this
standard depends upon properly establishing appropriate operating parameters, maintaining
calibration, implementing a suitable response testing and maintenance program, providing
proper training for operating personnel and developing operating procedures that address the
instrument limitations and capabilities.
2 Normative references
The following referenced documents are indispensable for the application 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 60050-393:2003, International Electrotechnical Vocabulary (IEV) – Part 393: Nuclear
instrumentation – Physical phenomena and basic concepts
IEC 60050-394:2007, International Electrotechnical Vocabulary (IEV) – Part 394: Nuclear
Instrumentation – Instruments, systems, equipment and detectors
IEC 60068-2-75:1997, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
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SIST EN 62533:2016
62533 © IEC:2010 – 7 –
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 2: Electrostatic discharge immunity test. Basic EMC Publication
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances induced by radio-frequency
fields
ISO 4037-1:1996, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 1: Radiation
characteristics and production methods
ISO 4037-2:1997, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 2: Dosimetry
for radiation protection over the energy ranges from 8 keV to 1,3 MeV and 4 MeV to 9 MeV
ISO 4037-3:1999, X and gamma reference radiation for calibrating dosemeters and doserate
meters and for determining their response as a function of photon energy – Part 3: Calibration
of area and personal dosemeters and the measurement of their response as a function of
energy and angle of incidence
International Bureau of Weights and Measures: The international System of Units (SI), 8th
edition, 2006
3 Terms, definitions, abbreviations, quantities and units
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those given
in IEC 60050-393 and IEC 60050-394 apply.
3.1.1
A-weighted sound level
the frequency weighting of an acoustic spectrum according to a standardized frequency
response curve based on the frequency response of the human ear
3.1.2
alarm
an audible, visual, or other signal activated when the instrument reading exceeds a preset
value or falls outside of a preset range
[IEV 393-18-03, modified]
3.1.3
ambient dose equivalent, Hx(10)
dose equivalent at a point in a radiation field, produced by the corresponding aligned and
expanded field, in the ICRU sphere at a depth of 10 mm, on the radius opposing the direction
of the aligned field
[ICRU Report 39]
NOTE 1 In defining these quantities, it is useful to stipulate certain radiation fields that are derived from the
actual radiation field. The terms "expanded" and "aligned" are used to characterise these derived radiation fields.
In the expanded field, the fluence and its angular and energy distribution have the same values throughout the
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volume of interest as in the actual field at the point of reference. In the aligned and expanded field, the fluence and
its energy distribution are the same as in the expanded field but the fluence is unidirectional.
NOTE 2 The ICRU sphere (see ICRU Report 33) is a 30 cm diameter, tissue-equivalent sphere with a density of
3
1 g/cm and a mass composition of tissue equivalent material (see IEV 393-14-78).
NOTE 3 The recommended depth d, for environmental monitoring in terms of Hx(d) is 10 mm, and Hx(d) may then
be written as Hx(10).
NOTE 4 An instrument that has an isotropic response and is calibrated in terms of Hx(d) will measure Hx(d) in
radiation fields that are uniform over the dimensions of the instrument.
NOTE 5 The definition of Hx(d) requires the design of the instrument to take account of backscatter.
[IEV 393-14-95]
3.1.4
&
ambient dose equivalent rate, Hx()10
the quotient of the ambient dose equivalent at the recommended depth for environmental
monitoring of 10 mm dHx(10) by dt, where dHx(10) is the increment of ambient dose equivalent
in the time interval dt
dHx()10
&
Hx()10 =
dt
3.1.5
background level
radiation field in which the instrument is intended to operate, including background produced
by naturally occurring radioactive material
3.1.6
conventionally true value of a quantity
value attributed to a particular quantity and accepted, sometimes by convention, as having an
uncertainty appropriate for a given purpose
NOTE 1 "Conventionally true value of a quantity" is sometimes called assigned value, best estimate of the value,
conventional value or reference value.
NOTE 2 A conventionally true value is, in general, regarded as sufficiently close to the true value for the
difference to be insignificant for the given purpose. For example, a value determined from a primary or secondary
standard or by a reference instrument, may be taken as the conventionally true value.
[IEV 394-40-10, modified]
3.1.7
effective range of measurement
absolute value of the difference between the two limits of a nominal range
NOTE In some fields of knowledge, the difference between the greatest and smallest values is called range.
[IEV 394-40-16]
3.1.8
false alarm
alarm not caused by an increase in radiation level over background conditions
3.1.9
functionality test
test performed to verify that alarm activation and radiation detection are acceptable
3.1.10
influence quantity
quantity that may have a bearing on the result of a measurement without being the subject of
the measurement
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SIST EN 62533:2016
62533 © IEC:2010 – 9 –
3.1.11
manufacturer
includes the designer of the equipment
3.1.12
point of measurement
place at which the conventionally true values are determined and at which the reference point
of the instrument is placed for test purposes
3.1.13
purchaser
includes the user of the equipment
3.1.14
radioactive material
in this standard, radioactive material includes special nuclear material, unless otherwise
specifically noted
3.1.15
readout
displayed value, with units, displayed and/or recorded by the instrument as a result of the
instrument’s response to some influence quantity
3.1.16
reference point of an instrument
mark on the equipment that represents the position of the instrument for the purpose of
calibration and testing
NOTE The point from which the distance to the source is measured.
[IEV 394-40-15, modified]
3.1.17
relative error, ε (%)
REL
error of measurement divided by a true value of the measurand
NOTE Since a true value cannot be determined, in practice a conventionally true value is used.
[IEV 394-40-11]
3.1.18
response, R
ratio of the instrument reading to the conventionally true value of the measured quantity
3.1.19
restricted (or expert) mode
advanced operating mode used by an expert user to access and control the parameters that
can affect the result of a measurement (for example alarm thresholds). Access to this mode
should be limited through password protection or other similar metho
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