BS IEC 62463 pdf download – Radiation protection instrumentation – X-ray systems for the screening of persons for security and the carrying of illicit items

BS IEC 62463 pdf download – Radiation protection instrumentation – X-ray systems for the screening of persons for security and the carrying of illicit items
This International Standard is applicable to X-ray systems designed for screening people todetect if they are carrying objects that could be used for criminal purposes,e.g., terrorist use,drug smuggling and theft. These objects include weapons, explosives, chemical and biologicalagents and other concealed items.
Three types of X-ray screening systems are currently in use.These are backscatter systems,transmission systems and combination backscatter/transmission systems. With backscattersystems the X-rays are used to detect objects hidden under or within the person’s clothing.With transmission systems objects swallowed or hidden in body cavities may be detected.Combined devices can be used to get both pieces of information simultaneously.
The object of this standard is to lay down standard requirements and also to specify generalcharacteristics,general test procedures，radiation characteristics,electrical characteristics,environmental influences，mechanical characteristics,safety requirements and to provideexamples of acceptable methods in terms of dose to the whole or part of the body for eachscreening procedure and the time taken for each screening procedure.
ln particular the standard addresses the design requirements as they relate to the radiationprotection of the people being screened, people who are in the vicinity of the equipment andthe operators.The standard does not address the performance requirements for the quality ofthe object detection.
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.
lEC 60038:2009,iEC standard voltages
IEC 60050-393:2003，International Electrotechnical Vocabulary (IEV) – Part 393: Nuclearinstrumentation – Physical phenomena and basic concepts
IEC 60050-394:2007,International Electrotechnical Vocabulary (IEV) – Part 394: Nuclearinstrumentation – Instruments,systems, equipments and detectors
IEC 60068-2-27,Environmental testing – Part 2-27:Tests – Test Ea and guidance: Shock
IEC 60068-2-75:1997,Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 61000-4-2，Electromagnetic compatibility(EMC) – Part 4-2: Testing and measurementtechniques – Electrostatic discharge immunity test
IEC 61000-4-3，Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurementtechniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4，Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurementtechriques – Electric fast fransient/bursf immunify test
IEC 61000-4-5，Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurementfechniques – Surge immunify test
IEC 61000-4-6，Electromagnetic compatibilify (EMC) – Part 4-6: Testing and measurementtechniques – lmmunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-12，Electromagnetic compatibility(EMC) – Part 4-12:Testing and measurementtechniques – Ring wave immunity test
lEC 61187.Electrical and electronic equipment – Documentation
IEC 61508 (all parts)。 Functional safety of electrical/electronic/programmable electronic safetyrelated systems
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
lSO 4037-1:1996,X and gamma reference radiation for calibrating dosemeters and doseratemeters and for determining their response as a function of photon energy -Part 1:Radiationcharacteristics and production method
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.The generalterminology concerning X-ray screening systems is given in IEC 60050-393:2003 andIEC 60050-394:2007.
3.1
ambient dose equivalent, Hx(d)
the ambient dose equivalent at a point in a radiation field, is the dose equivalent that wouldbe produced by the corresponding expanded and aligned field, in the lCRU sphere at a depth,d, on the radius opposing the direction of the aligned field
[ICRu 51]
NOTE 1 The recommended depth, d, for strongly penetrating radiation is 10 mm,and ambient dose equivalent atthis depth may be written as Hx (10,.
NOTE 2Soft tissue means ICRu 4-element，see ICRu 39.
3.2
constant potential x-ray unit
unit in which the ripple of the high voltage does not exceed ±10 %
3.3
exposure beam location
that part of the external surface of the system enclosure through which the collimated X-raybeam passes
3.4
half value layer (air kerma),HvL or HVLx
the thickness of the specified material which attenuates the beam of radiation to an extentsuch that the air kerma rate is reduced to one half of its original value. In this definition, thecontribution of all scattered radiation,other than any which might be present initially in thebeam concerned, is deemed to be excluded.