SIST EN 62244:2011

SLOVENSKI STANDARD
01-oktober-2011
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Radiation protection instrumentation - Installed radiation monitors for the detection of
radioactive and special nuclear materials at national borders
Strahlenschutz-Messgeräte - Fest installierte Strahlungsmonitore für den Nachweis von
radioaktiven Stoffen und spaltbarem Nuklearmaterial an Staatsgrenzen
Instrumentation pour la radioprotection - Moniteurs de rayonnement installés pour la
détection des matériaux nucléaires radioactifs et spéciaux aux frontières nationales
Ta slovenski standard je istoveten z: EN 62244:2011
ICS:
13.280 Varstvo pred sevanjem Radiation protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62244
NORME EUROPÉENNE
July 2011
EUROPÄISCHE NORM
ICS 13.280
English version
Radiation protection instrumentation -
Installed radiation monitors for the detection of radioactive and special
nuclear materials at national borders
(IEC 62244:2006, modified)
Instrumentation pour la radioprotection -  Strahlenschutz-Messgeräte -
Moniteurs de rayonnement installés pour Fest installierte Strahlungsmonitore für
la détection des matériaux nucléaires den Nachweis von radioaktiven Stoffen
radioactifs et spéciaux aux frontières und spaltbarem Nuklearmaterial an
nationales Staatsgrenzen
(CEI 62244:2006, modifiée) (IEC 62244:2006, modifiziert)

This European Standard was approved by CENELEC on 2011-06-27. 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, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62244:2011 E
Foreword
The text of the International Standard IEC 62244:2006, prepared by SC 45B, “Radiation protection
instrumentation”, of IEC TC 45, “Nuclear instrumentation”, together with the common modifications prepared
by the Technical Committee CENELEC TC 45B, Radiation protection instrumentation, was submitted to the
CENELEC formal vote and was approved by CENELEC as EN 62244 on 2011-06-27.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.

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) 2012-06-27

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-06-27
Annex ZA has been added by CENELEC.
Subclauses which are additional to those in IEC 62244 are prefixed “Z”.
____________
- 3 - EN 62244:2011
Endorsement notice
The text of the International Standard IEC 62244:2006 was approved by CENELEC as a European Standard
with agreed common modifications as given below.

COMMON MODIFICATIONS
3 Terms and definitions
3.1 alarm assembly
Change text to “component that provides audio or visual signals, or both, when an alarm level is
exceeded or a malfunction occurs”.
3.2 detection assembly
Change text to “component of the installed radiation monitor system that contains the detector(s)
and associated electronic devices”.
3.3 detection zone
Insert “being monitored” between “person” and “may”.
3.6 reference point of the detector zone
Delete “that” at start of definition.
Add a new definition
“3.Z1 special nuclear materials
plutonium except that with isotopic concentration exceeding 80 % in plutonium-238; uranium-233;
uranium enriched in the isotope 235 or 233; uranium containing the mixture of isotopes as occurring
in nature other than in the form of ore or ore-residue; any material containing one or more of the
foregoing.
(IAEA-TECDOC-1311)”
4 General Characteristics
4.1 Overview
Replace the last paragraph with “Figure 1 shows an example of the detection zone dimensions for a
monitor that uses two detection assemblies. The following detection zone widths, W, are applicable
to the above four types of monitors.
- pedestrian: Single detector assembly, 1,0 m.
Two detector assemblies, 1,0 m;
- road vehicle: not exceeding 5,0 m;
- rail vehicles: not exceeding 6,0 m;
- conveyor: See 4.5.”.
4.2 Pedestrian
Delete last sentence of paragraph 1.
nd nd
2 paragraph, delete 2 sentence.
Replace last sentence with “For dynamic monitors, the range of passage speeds shall be specified
by the manufacturer, this range shall include 1,2 m/s for pedestrian monitors.”

4.3 Road vehicles (includes road transported containers)
Replace last sentence with “For dynamic monitors, the range of passage speeds shall be specified
by the manufacturer, this range shall include 8 km/h for road vehicle monitors.”
4.4 Rail vehicles (includes rail transported containers)
Replace last sentence with “For dynamic monitors, the range of passage speeds shall be specified
by the manufacturer, this range shall include 8 km/h for rail vehicle monitors.”
4.5 Conveyor
Replace last sentence with “For dynamic monitors, the range of passage speeds shall be specified
by the manufacturer, this range shall include 1 m/s for conveyor monitors.”
4.6 Configuration
nd
Replace 2 paragraph with “A detection assembly may consist of a single detector or multiple
detectors contained within a protective cabinet. A monitor may consist of a single detector assembly
or multiple detector assemblies.”
Start the last two paragraphs with “The monitor shall …”.
4.8 Speed control
Replace the section with “The performance of the monitor is dependent on the speed at which the
object being monitored passes through the detection zone. Therefore the monitors, with the
exception of the pedestrian and conveyor monitors, shall include a device for measuring the average
speed of the object passing through the detection zone. An excessive speed alarm shall be provided
that would indicate if the passage speed exceeds the upper speed of the range stated by the
manufacturer. The speed alarm set point shall be adjustable up to a manufacturer-defined maximum
speed.”
5 General test procedures
5.6 Alarm probability for gamma and neutron radiation
Change in line two “detection probability” to “alarm probability”
5.7 Reference radiation
5.7.1 Gamma
First NOTE: Change “NOTE” to “NOTE 1”.
First line of new NOTE 1: Change “0,1 µSv/h” to “0,1 µGy/h”.
Line 3 of third paragraph: After “if not encapsulated” insert “in 0,25 mm stainless steel”.
Last NOTE: Change “NOTE” to “NOTE 2”.
5.7.2 Neutron
Replace whole section with “ Cf shall be used for neutron tests. The source should have an activity
-2 -1
that would produce an unscattered neutron fluence rate of 0,04 cm s at the closest point of the
-1
detector. This fluence rate is approximately equivalent to a neutron emission rate of 20 000 s at 2 m
source to detection surface distance.”.

- 5 - EN 62244:2011
5.7.3 SNM
Replace heading with “Special nuclear material (SNM)”
Replace whole section with “Standardized SNM test sources given in Annex A may be used by
agreement between manufacturer and user. Test should be performed using the acceptance
requirements given in 6.3 or 6.4 (i.e. 49 successes out of 50 trials).”.
6 Radiation characteristics
Change title to “Radiation characteristics (applicable to all types of monitors)”.
6.1 False alarm test
6.1.1 Requirements
Replace whole section with “No more than one alarm shall occur over a period of 100 h with the
monitor operating in a stable background with a level below the set alarm level.”.
6.1.2 Method of tests
Replace first sentence with “With the monitor operating normally in a stable background initiate a
monitoring cycle as per the manufacturer’s specification at 5 min intervals for a period of 100 h.”.
6.2 Background effects
6.2.1 Requirement
Insert new sentence between first and second paragraph. “The instrument shall alarm when
exposed at 1,5 times the manufacturer’s stated instrument’s maximum background level.”.
6.2.2 Method of tests
Number first paragraph a).
nd
Replace 2 paragraph with the following two paragraphs:
“b) Place the monitor for 100 s in a background level equal to the manufacturer’s stated maximum
background plus 50 %. During this 100 s the monitor shall indicate “non operational”.
c) Place the monitor in a background level equal to the manufacturer’s stated maximum background.
Then perform a gamma detection test as stated in step 6.3.2 for Cs only. The monitor shall meet
the requirements given in 6.3.1.”.
6.3 Gamma radiation detection
6.3.2 Method of test
Replace first sentence with “For a dynamic monitor, the source shall be moved through the detection
zone at the passage velocity stated for that particular monitor type, 1,2 m/s for pedestrian monitors,
8 km/h for road and rail vehicle monitors and 1 m/s for conveyor monitors.”.

6.4 Neutron radiation detection
6.4.2 Method of test
Change NOTE to “This fluence rate is approximately equivalent to a neutron emission rate of
-1
20 000 s at 2 m source to detection surface distance.”.
Add at the end of second paragraph “, 1,2 m/s for pedestrian monitors, 8 km/h for road and rail
vehicle monitors and 1 m/s for conveyor monitors.”
6.5 Overload characteristics
6.5.2 Method of test
Remove in line 2 “ambient”.
Add at the end of this section “This shall be demonstrated using a Cs source with the test method
described in 6.3 but with a reduced number of trials.”.
7 Electrical characteristics
7.1 Mains operation
7.1.2 Method of test
Replace in the first line “defined in 6.3” with “defined in 5.7”.
8 Electromagnetic compatibility
8.1 External magnetic fields
8.1.1 Requirements
Insert at the end of the paragraph “When exposed to external magnetic fields the count rate shall not
vary by more than ± 15 % from the rate under standard test conditions.”.
8.1.2 Method of test
Add at the end of the last sentence “due to the magnetic field.”
8.2 Radiated electromagnetic fields
8.2.2 Method of test
Add at the end of the penultimate sentence “with maximum of ±15 % of count rate change”
Change in the last line “setting” to “status”.
8.3 Conducted disturbances by bursts and radio frequencies
8.3.2 Method of test
Change in test c) “decades” to “order of magnitude”.
Add in the last sentence at the end “due to the conducted disturbances”.

- 7 - EN 62244:2011
9 Mechanical characteristics
9.3 Vibration test
9.3.2 Method of test
Add at the end of section a) “(IEC 60068-2-6)”.
9.4 Microphonics/impact
9.4.1 Requirements
Insert between “unaffected” and “by” “(remain within ± 15 % of the pre-test values)”.
9.4.2 Method of test
Delete second paragraph.
10 Environmental characteristics
10.1 Ambient temperature
10.1.2 Method of test
Add at the end of second paragraph “and in 10.1.1”.
10.2 Relative humidity
10.2.2 Method of test
Add in line 5 between ‘Table 3” and “is” “and in 10.2.1”.
10.3 Sealing
10.3.2 Method of test
Change in line 2 “10 l/m” to “10 l/m “.
11 Documentation
11.2 Certificate
Add at the end another bullet “– maximum operational background, see 6.2.1.”.
Table 1 – Reference conditions and standard test conditions
Add a new row below “Reference Gamma radiation source”: “Reference Neutron radiation source”
and add in both new columns 2 and 3 “ Cf“.
Table 3 – Tests performed with variations of influence quantities
Add in row 3 (External magnetic fields) in column 3 at the end “by more than ± 15 % of the rate
under standard test conditions”.
Insert in row 8 (Mechanical characteristics) in column 2, “Shock” before first paragraph and
“Vibration” before second paragraph.
Replace in the last row the content of column 2 with “Rain of 10 l/m “.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

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 60038 - IEC standard voltages EN 60038 -

IEC 60050-393 - International Electrotechnology Vocabulary - - -
Part 393: Nuclear instrumentation - Physical
phenomena and basic concepts
IEC 60050-394 1995 International Electrotechnical Vocabulary - - -
+ A1 1996 Chapter 394: Nuclear instrumentation: - -
+ A2 2000 Instruments - -
IEC 60068-2-18 - Environmental testing - EN 60068-2-18 -
Part 2-18: Tests - Tests R and guidance: Water

IEC 60068-2-27 Environmental testing - EN 60068-2-27 -
Part 2-27: Tests - Test Ea and guidance: Shock

IEC 60068-2-75 - Environmental testing - EN 60068-2-75 -
Part 2-75: Tests - Test Eh: Hammer tests

IEC 60359 - Electrical and electronic measurement EN 60359 -
equipment - Expression of performance

IEC 61000-4-2 - Electromagnetic compatibility (EMC) - EN 61000-4-2 -
Part 4-2: Testing and measurement techniques
- Electrostatic discharge immunity test

IEC 61000-4-3 - Electromagnetic compatibility (EMC) - EN 61000-4-3 -
Part 4-3: Testing and measurement techniques
- Radiated, radio-frequency, electromagnetic
field immunity test
IEC 61000-4-4 - Electromagnetic compatibility (EMC) - EN 61000-4-4 -
Part 4-4: Testing and measurement techniques
- Electrical fast transient/burst immunity test

IEC 61000-4-5 - Electromagnetic compatibility (EMC) - EN 61000-4-5 -
Part 4-5: Testing and measurement techniques
- Surge immunity test
IEC 61000-4-6 - Electromagnetic compatibility (EMC) - EN 61000-4-6 -
Part 4-6: Testing and measurement techniques
- Immunity to conducted disturbances, induced
by radio-frequency fields
IEC 61000-4-12 - Electromagnetic compatibility (EMC) - EN 61000-4-12 -
Part 4-12: Testing and measurement
techniques - Ring wave immunity test

IEC 61187 - Electrical and electronic measuring equipment -EN 61187 -
Documentation
At draft stage.
NORME CEI
INTERNATIONALE
IEC
INTERNATIONAL
Première édition
STANDARD
First edition
2006-06
Instrumentation pour la radioprotection –
Moniteurs de rayonnement installés pour la
détection des matériaux nucléaires radioactifs
et spéciaux aux frontières nationales

Radiation protection instrumentation –
Installed radiation monitors for the detection
of radioactive and special nuclear materials
at national borders
 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

62244  IEC:2006 – 3 –
CONTENTS
FOREWORD.7

1 Scope and object.11
2 Normative references .11
3 Terms and definitions .13
4 General characteristics.17
4.1 Overview .17
4.2 Pedestrian.17
4.3 Road vehicles (includes road transported containers).19
4.4 Rail vehicles (includes rail transported containers) .19
4.5 Conveyor.19
4.6 Configuration.19
4.7 Indication features.21
4.8 Speed control.21
5 General test procedures .21
5.1 Nature of tests.21
5.2 Reference conditions and standard test conditions .23
5.3 Tests performed under standard test conditions .23
5.4 Tests performed with variation of influence quantities.23
5.5 Statistical fluctuations .23
5.6 Alarm probability for gamma and neutron radiation.23
5.7 Reference radiation .23
6 Radiation characteristics .25
6.1 False alarm test .25
6.2 Background effects.25
6.3 Gamma radiation detection.27
6.4 Neutron radiation detection .27
6.5 Overload characteristics .29
7 Electrical characteristics.29
7.1 Mains operation.29
7.2 Occupancy sensor.31
8 Electromagnetic compatibility .31
8.1 External magnetic fields .31
8.2 Radiated electromagnetic fields.31
8.3 Conducted disturbances induced by bursts and radio frequencies .33
8.4 Surges and oscillatory waves .33
8.5 Electrostatic discharge .35
9 Mechanical characteristics.37
9.1 Areas of application.37
9.2 Mechanical shocks .37
9.3 Vibration test.37
9.4 Microphonics/impact.39

62244  IEC:2006 – 5 –
10 Environmental characteristics .39
10.1 Ambient temperature .39
10.2 Relative humidity.41
10.3 Sealing.41
11 Documentation .43
11.1 Type test report.43
11.2 Certificate .43
11.3 Operation and maintenance manual .43

Annex A (informative) Standardized special nuclear materials test sources for type
testing of installed radiation monitors at national borders.51

Figure 1 – Example of a two-sided system .49

Table 1 – Reference conditions and standard test conditions .45
Table 2 – Tests performed under standard test conditions .45
Table 3 – Tests performed with variations of influence quantities.47
Table A.1 – Minimum SNM test sources.53

62244  IEC:2006 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RADIATION PROTECTION INSTRUMENTATION –
INSTALLED RADIATION MONITORS FOR THE DETECTION
OF RADIOACTIVE AND SPECIAL NUCLEAR MATERIALS
AT NATIONAL BORDERS
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 and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 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 may be the subject of patent rights.
IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62244 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/497/FDIS 45B/509/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.

62244  IEC:2006 – 9 –
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
62244  IEC:2006 – 11 –
RADIATION PROTECTION INSTRUMENTATION –
INSTALLED RADIATION MONITORS FOR THE DETECTION
OF RADIOACTIVE AND SPECIAL NUCLEAR MATERIALS
AT NATIONAL BORDERS
1 Scope and object
The scope of this International Standard is to define the performance of installed monitors
used for the detection of gamma and neutron radiation emitters contained in objects/
containers or vehicles, general characteristics, mechanical characteristics, environmental
requirements, test procedures and documentation.
This standard is applicable to installed monitors designed to detect special nuclear and other
radioactive materials by their emitted gamma and/or neutron radiation. They are used to
monitor vehicles, cargo containers, people, or packages and are typically located at national
and international borders, but may be used at any location where there is a need for this type
of monitoring. This standard does not apply to hand-held monitors.
Information regarding the detection of special nuclear material (SNM) is contained in Annex A.
This standard provides the purchaser with information that may be used to determine the
performance of the monitor in detecting the presence of radioactive sources. This standard
does not provide the data needed to determine the performance of the monitor in measuring
the quantity of the radioactive material.
In this standard, the term radioactive material includes both special nuclear and radioactive
material unless otherwise specifically noted. The radioactive material may be transported by
vehicle, carried by person, or concealed in a cargo container or in a package moved by
conveyor belt, such as international mail parcels.
Conformance with the requirements of this standard does not guarantee that a radioactive
source will always be discovered.
The selection of the location and the configuration of the monitoring system on each site
needs to be optimised to achieve the best performance, however, this is outside the scope of
this standard.
2 Normative references
The following referenced documents are relevant to 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 60038, IEC standard voltages
IEC 60050-393, International Electrotechnical Vocabulary (IEV) – Part 393: Nuclear
instrumentation – Physical phenomena and basic concepts

62244  IEC:2006 – 13 –
IEC 60050-394:1995, International Electrotechnical Vocabulary (IEV) – Chapter 394: Nuclear
instrumentation: Instruments
Amendment 1 (1996)
Amendment 2 (2000)
IEC 60068-2-18, Environmental testing – Part 2-18: Tests – Test R and guidance: Water
IEC 60068-2-27, Environmental testing – Part 2: Tests – Test Ea and guidance: Shock
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60359, Electrical and electronic measurement equipment – Expression of performance
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test.
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances induced by radio-frequency fields
IEC 61000-4-12, Electromagnetic compatibility (EMC) – Part 4-12: Oscillatory waves immunity
test
IEC 61187, Electrical and electronic equipment – Documentation
3 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those given
in IEC 60050-393, IEC 60050-394 and IEC 60359, apply.
3.1
alarm assembly
component that provides audio or visual signals or both to call attention
3.2
detection assembly
that component of the installed radiation monitor system that contains the detectors and
associated electronic devices
62244  IEC:2006 – 15 –
3.3
detection zone
location where radiation emitted by an object or person may be detected by the detection
assembly(s). For two-sided monitors, the detection zone is located between opposing
detection assemblies; for single-sided monitors, the detection zone is adjacent to the
detection assembly surface
3.4
radioactive material
both special nuclear and radioactive material, unless otherwise specifically noted
3.5
reference point of an assembly
physical mark on a piece of equipment or assembly to be used in order to position it at a point
where the conventionally true value of the quantity to be measured is known
NOTE For this standard, the physical mark may be used to identify where a source is positioned.
3.6
reference point of the detection zone
that point that is at the geometrical center of the detection zone for two-sided monitors, or at
the geometric center point of the detection zone that is adjacent to a single-sided detector at
a distance from the detection assembly surface that is based on the monitor type
3.7
units
units of the International System (SI)
3.8 Test nomenclature
3.8.1
qualification tests
tests performed on a representative sample of equipment to verify the adequacy of the design
and that the equipment meets the specifications agreed upon between manufacturer and user
under normal, operational conditions and anticipated operation occurrences
NOTE Qualification tests are performed in order to verify that the requirements of a specification are fulfilled.
3.8.2
type test
conformity test made of one or more items representative of the production
[IEV 394-20-28, modified]
3.8.3
routine test
test to which every device is subjected by the manufacturer or by the user to confirm
compliance with certain criteria.
[IEV 394-20-08, modified]
62244  IEC:2006 – 17 –
3.8.4
acceptance test
contractual test to prove to the customer that the device meets certain conditions of its
specification
[IEV 394-20-09]
3.8.5
supplementary tests
tests intended to provide supplementary information on certain characteristics of the assemblies
4 General characteristics
4.1 Overview
Monitors addressed by this standard are designed to detect radiation from gamma and/or
neutron emitters contained in objects, containers, or vehicles, or carried by a pedestrian.
They issue a visual and/or audible alarm when the signal from the detection system exceeds
an alarm threshold. Measurement occurs when the object passes through the detection zone
(dynamic mode) or is placed for some period of time within the detection zone (static mode).
Alarms are activated when the measured gamma or neutron emissions are statistically greater
than the photon and/or neutron count rate detected in the absence of radioactive material.
According to their use, monitors are classified as
– pedestrian,
– road vehicle,
– rail vehicle,
– conveyor.
If a monitor is designed for use in two or more classifications, its associated detection zone
shall be appropriate for each classification.
The detection zone shall be equivalent in width to the width of the entire detector assembly.
The height shall be as required for its specific use and is described in the following
subclauses. For example, if the detector assembly for a pedestrian monitor is 1 m wide by 2 m
high, the detection zone will be 1 m wide and from 0,1 m to 2 m from the floor or ground
surface.
4.2 Pedestrian
Pedestrian monitors shall provide a detection zone to ensure that people are monitored
properly. As a minimum, the height of the detection zone shall be from 0,1 m to 2 m from the
base surface. The width shall be based on the width of the detection assembly.
Monitors may use a single detection assembly (single-sided) or multiple opposing detection
assemblies (two-sided). The maximum distance of the detection zone shall be no more than
1 m from the surface of the detection assembly for single-sided monitors. The detection zone
of two-sided monitors is located between the detection assemblies. For evaluation purposes,
the distance between each opposing detection assembly is 1 m.
For dynamic monitors, the passage speed shall not exceed 1,2 m/s.

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4.3 Road vehicles (includes road transported containers)
Road vehicle monitors shall provide a detection zone that ensures that the entire vehicle is
monitored during passage. The monitoring system should be two-sided. Single-side monitors
are discouraged. The detection zone of two-sided monitors is located between the detection
assemblies, which should not be greater than 5 m apart. The height of the detection zone
shall be from 0,2 m to 4,5 m from the base surface.
For dynamic monitors, the passage speed shall not exceed 8 km/h.
NOTE The height of the detection zone may be changed on the basis of national requirements.
4.4 Rail vehicles (includes rail transported containers)
Rail vehicle monitors shall be two-sided. The detection zone shall be located between the
opposing detection assemblies, which should not be more than 6 m apart. The height of the
detection zone shall be from 0,3 m (from the rail) to 6 m.
For dynamic monitors, the passage speed shall not exceed 8 km/h.
NOTE The height of the detection zone may be changed on the basis of national requirements.
4.5 Conveyor
Conveyor monitors shall provide a detection zone that ensures that items moving through the
detection zone are monitored properly. Conveyor monitors may use a single detection
assembly or multiple detection assemblies with detectors across the top, bottom, and/or
side(s) of the detection zone. The detection zone should be located no more than 1 m from
the detection assembly surface and be equivalent to the width of the conveyor, or for side
mounted detection assemblies, the detection zone shall be equivalent in height to the
maximum height of the objects being monitored.
The passage speed shall not exceed 1 m/s.
4.6 Configuration
A monitor may be designed as a measurement assembly connected to one or several
detection assemblies that are contiguous to the measurement assembly or placed at a
distance from it.
A detection assembly may consist of a single detector or multiple detectors contained within a
protective cabinet. The cabinet may also contain radiation shielding to reduce background
radiation levels. A monitor system may consist of a single detection assembly or multiple
assemblies. A monitor containing several detection assemblies placed around the detection
zone may be named the “detection system”.
The design shall be such that operation is possible with the detection and measurement
assemblies separated by at least 100 m.
The detection assemblies shall be designed to operate under all weather conditions expected
at the point of installation. Enclosure(s) provided for assemblies intended for outdoor use
shall not deteriorate during prolonged installation under these conditions.

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The detection assembly for vehicle monitoring both road and rail may be subjected to
vibration due to the heavy vehicles being monitored. Mounting techniques (i.e.: concrete
pads) that are not addressed by this standard shall be designed to minimize the transfer of
vibrations and shocks to the detection system.
Controls and adjustments which affect calibration and alarm settings shall be so designed that
access to them is limited to authorised persons.
Provisions shall be made to permit testing of visual and/or audible warning indicators without
the use of radiation sources.
The monitoring system shall have the ability to display signals from each detector or detector
assembly as appropriate.
The monitoring system shall provide state of health information. State of health monitoring
shall include fault detection such as loss of high voltage, low count rate, high-count rate, or
other electronic failures as a minimum.
4.7 Indication features
The monitor shall have the capability to store and display time history data including
background readings both prior to and after a measurement, and alarm information. Storage
and display capabilities may be accomplished, for example, by providing outputs for recorders
or computers, or be internal to the measurement assembly. Data transfer techniques and
format methods shall be fully described by the manufacturer and should be based on
available technology. The monitor shall provide records containing results of vehicle or
pedestrian scans. The record format should be agreed between the manufacturer and the
purchaser, but as a minimum shall contain time, date, pre-count background count rate, and
count rate of alarm. The term "manufacturer" includes the designer of the equipment. The
term "purchaser" includes the user of the equipment
The monitor shall be capable of providing a local indication and alarm signal and of providing
these signals to an additional remote station at a distance of up to 100 m. This additional
remote station may be a portable computer or processing and display unit. The monitor shall
be unaffected by, and completely independent of, any operational mode or malfunction of the
remote station.
4.8 Speed control
The performance of the monitor is dependent on the speed at which the object being
monitored passes through the detection zone. Therefore, the monitor shall include a device
for measuring the average speed of the object passing through the detection zone. An
excessive speed alarm shall be provided that would indicate if the passage speed exceeds
that required to attain the detection levels needed.
The speed alarm set point shall be adjustable up to a user-defined maximum speed setting.
The manufacturer shall indicate the passage speed at which the detection levels provided in
the monitor’s specifications were obtained.
5 General test procedures
5.1 Nature of tests
Unless otherwise specified in the individual subclauses, all tests enumerated in this standard
are to be considered as "type tests".

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5.2 Reference conditions and standard test conditions
Reference and standard test conditions are given in Table 1. Reference conditions are those
conditions to which the performance of the instrument is referred and standard test conditions
indicate the necessary tolerances in practical testing. Except where otherwise specified, the
tests in this standard shall be performed under the standard test conditions given in the third
column of Table 1.
5.3 Tests performed under standard test conditions
Tests performed under standard test conditions are listed in Table 2, which indicates
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