IEC 62438 pdf download – Radiation protection instrumentation – Mobile instrumentation for the measurement of photon and neutron radiation in the environment

IEC 62438 pdf download – Radiation protection instrumentation – Mobile instrumentation for the measurement of photon and neutron radiation in the environment
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1 Scope and object
This International Standard is applicable to mobile radiation detection systems used for thedetection，quantification and identification of photon and/or neutron emitters in theenvironment.This includes point and distributed radiation sources.
The object of this standard is to:
establish definitions;
establish minimum requirements for the instrumentation;establish requirements for deployment and operations;provide test and calibration methods; and
provide guidance to procurement for appropriate equipment.
ln general,mobile instrumentation systems for nuclear radiation measurements in theenvironment are comprised of detectors, detector signal processors, position sensing devices,on-board data recording, operational monitoring,and real time display/alarm capabilities. Inaddition, advanced systems may provide data streams that can be transmitted by telemetry tooperations centres.
2Normative 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 editionof the referenced document (including any amendments) applies.
IEC 60050-393:2003，International Electrotechnical Vocabulary (IEV) – Chapter 393:Nuclearinstrumentation – Physical phenomena and basic concepts
IEC 60050-394:2007，International Electrotechnical Vocabulary (IEV) – Part 394: Nuclearinstrumentation – Instruments,systems,equipment and detectors
IEC 60068-1:1988，Environmental testing -Part 1: General and guidance
IEC 60068-2-6:2007,Environmental testing – Part 2-6:Tests – Test Fc: Vibration (sinusoidal)IEC 60068-2-14:2009，Environmental testing – Part 2-14: Tests – Test N: Change oftemperature
IEC 60068-2-30:2005，Environmental testing – Part 2-30:Tests – Test Db: Damp heat, cyclic(12 h + 12 h cycle)
IEC 60086(all parts), Primary batteries
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)IEC 60973:1989,Test procedures for germanium gamma-ray detectors
IEC 61010-1:2001,Safety requirements for electrical equipment for measurement, control andlaboratory use
IEC 62534,Radiation protection instrumentation – Highly sensitive hand-held instruments forneutron detection of radioacfive material1
ISo 4037 (all parts)、X and gamma reference radiation for calibrating dosemeters anddoserate meters and for determining their response as a function of photon energy
Iso 6980 (all parts), Nuclear energy – Reference befa-particle radiafion
Terms, definitions and nomenclature
3.1 Definitions
For the purposes of this document,the following terms and definitions apply.Except asspecified below,all technical terms are as defined in IEC 60050，particularly for radiationquantities and dosimetric terms defined in lEC 60050-393 and lEC 60050-394.
3.1.1mobile detection system
mobile detection systems consist of a suitable number of radiation detectors mounted on antransportable platform，which are capable of making measurements while moving (seeFigure 1)
NOTEThis may include but is not limited to fixed and rotary winged aircraft， surface vehicles,ocean towing, andamphibious vehicles.
3.1.2energy resolution
the full width in percent or keV at half maximum at a defined total absorption peak (see AnnexA)
3.1.3background (intrinsic, platform and cosmic)
the measured count rate from photons in an energy spectrum or a given energy window or themeasured count rate from neutrons from the detection system，platform and cosmic radiation(see Annex A)
3.1.4positional reference
the spatial reference which defines the location of the detection system in terms of acoordinate system and where necessary,altitude and the height above the surface
3.1.5area of investigation
the area from which 90 % of the detected photons and neutrons of interest are emitted,assuming a planar surface of uniform activity
3.1.6sampling interval
the time in seconds between the start of consecutive data samples or measurements.This isalso known as the integration time