Norm

ISO 6980-1:2006 en

Kernenergie - Referentiestraling van Bètadeeltjes - Deel 1: Productiemethoden

73,12

Over deze norm

Status Definitief
Aantal pagina's 13
Commissie Radioactiviteit - Toepassing en meten
Gepubliceerd op 01-08-2006
Taal Engels
This part of ISO 6980 specifies the requirements for reference beta radiation fields produced by radionuclide sources to be used for the calibration of personal and area dosemeters and dose-rate meters to be used for the determination of the quantities Hp(0,07) and H 0,07 )? ), and for the determination of their response as a function of beta particle energy and angle of incidence. It gives the characteristics of radionuclides that have been used to produce reference beta radiation fields, gives examples of suitable source constructions and describes methods for the measurement of the residual maximum beta particle energy and the dose equivalent rate at a depth of 0,07 mm in the International Commission on radiation units and measurements (ICRU) sphere. The energy range involved lies between 66 keV1) and 3,6 MeV and the dose equivalent rates are in the range from about 10 ?Sv h 1 to at least 10 Sv h 1. In addition, for some sources variations of the dose equivalent rate as a function of the angle of incidence are given. This part of ISO 6980 proposes two series of beta reference radiation fields, from which the radiation necessary for determining the characteristics (calibration and energy and angular dependence of response) of an instrument can be selected. Series 1 reference radiation fields are produced by radionuclide sources used with beam flattening filters designed to give uniform dose equivalent rates over a large area at a specified distance. The proposed sources of 90Sr 90Y, 85Kr, 204Tl and 147Pm produce maximum dose equivalent rates of approximately 200 mSv h 1. Series 2 reference radiation fields are produced without the use of beam-flattening filters, which allows large area planar sources and a range of source-to-calibration plane distances to be used. Close to the sources, only relatively small areas of uniform dose rate are produced, but this series has the advantage of extending the energy and dose rate ranges beyond those of Series 1. The radionuclides used are those of series 1 with the addition of the radionuclides 14C and 106Ru 106Rh; these sources produce dose equivalent rates of up to 10 Sv h 1.

Details

ICS-code 17.240
Nederlandse titel Kernenergie - Referentiestraling van Bètadeeltjes - Deel 1: Productiemethoden
Engelse titel Nuclear energy - Reference beta-particle radiation - Part 1: Methods of production
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