IEC 61563 pdf download Radiation protection instrumentation – Equipment for measuring specific activity of gamma-emitting radionuclides in foodstuffs
This International Standard applies to portable instruments used for measuring the specific orvolumic activity of gamma-emitting radionuclides in food/foodstuffs intended for operationunder field conditions，particularly in case of a post-accidental situation. It does not apply tolow background laboratory instrumentation requiring highly skilled personnel.
The instruments designed for measurement of gamma contamination in foodstuffs under fieldconditions should not require special sample preparation other than machining (cutting,grinding, etc.).
These instruments may be used，in principle，to measure the gamma emitting surfacecontamination and other radiation measurements as well, but these applications are outsidethe scope of this standard.
The same instruments intended for measuring foodstuffs can also be used for the measurement of environmental samples,such as soil, sewage, plant and animal life,etc.These instruments can be used to estimate specific gamma activity for a wide variety of samples according to this standard.
The purpose of this standard is to specify the main performance characteristics ofinstruments，intended for measurement of specific activity of gamma-emitting radionuclides infoodstuffs,their methods of testing and documentation requirements.
2 Normative references
The following normative documents contain provisions which，through reference in this text,constitute provisions of this International Standard. For dated references,subsequentamendments to, or revisions of， any of these publications do not apply. However，parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below.For undatedreferences, the latest edition of the normative document referred to applies. Members of lEC
and lSO maintain registers of currently valid International Standards.
IEC 60050(393):1996,International Electrotechnical Vocabulary (IEV) – Chapter 393:Nuclearinstrumentation:Physical phenomena and basic concepts
IEC 60050(394):1995, International Electrotechnical Vocabulary (IEV) – Chapter 394: Nuclearinstrumentation: lnstruments
IEC 60068-2-27:1987,Environmental testing – Part 2:Tests – Test Ea and guidance: ShockIEC 60086:(all parts) Primary batteries
IEC 61187:1993，Electrical and electronic measuring equipment – Documentation
3 Terminology and units
The general terminology for detection and measurement of ionizing radiation and nuclear instrumentation is given in IEC 60050(393) and IEC 60050(394). For the purpose of this standard the following definitions apply:
instrument intended to measure quantities related to ionizing radiation
[IEV 394-02-01 ]
activity per unit mass (Bq/kg)
[IEV 393-04-1 3 modified]
activity per unit volume (Bq/m 3 )
[IEV 393-04-1 4 modified]
ratio of the number of detected particles to the number of particles of the same type which are incident on the detector in the same time interval
[IEV 394-1 8-21 ]