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 -
...