STM_51631-13.pdf

ISO/ASTM 51631:2013(E)An American National StandardStandard Practice forUse of Calorimetric Dosimetry Systems for Electron BeamDose Measurements and Routine Dosimetry SystemCalibration1This standard is issued under the fixed designation ISO/ASTM 51631;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.1.Scope1.1 This practice covers the preparation and use of semi-adiabatic calorimetric dosimetry systems for measurement ofabsorbed dose and for calibration of routine dosimetry systemswhen irradiated with electrons for radiation processing appli-cations.The calorimeters are either transported by a conveyorpast a scanned electron beam or are stationary in a broadenedbeam.1.2 This document is one of a set of standards that providesrecommendations for properly implementing dosimetry inradiation processing,and describes a means of achievingcompliance with the requirements ofASTM Practice E2628 fora calorimetric dosimetry system.It is intended to be read inconjunction with ASTM Practice E2628.1.3 The calorimeters described in this practice are classifiedas Type II dosimeters on the basis of the complex effect ofinfluence quantities.See ASTM Practice E2628.1.4 This practice applies to electron beams in the energyrange from 1.5 to 12 MeV.1.5 The absorbed dose range depends on the absorbingmaterial and the irradiation and measurement conditions.Minimum dose is approximately 100 Gy and maximum dose isapproximately 50 kGy.1.6 The average absorbed-dose rate range shall generally begreater than 10 Gys-1.1.7 The temperature range for use of these calorimetricdosimetry systems depends on the thermal resistance of thematerials,on the calibrated range of the temperature sensor,and on the sensitivity of the measurement device.1.8 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E170 Terminology Relating to Radiation Measurements andDosimetryE666 Practice for CalculatingAbsorbed Dose From Gammaor X RadiationE668 Practice for Application of Thermoluminescence-Dosimetry(TLD)Systems for DeterminingAbsorbed Dosein Radiation-Hardness Testing of Electronic DevicesE2628 Practice for Dosimetry in Radiation ProcessingE2701 Guide for Performance Characterization of Dosim-eters and Dosimetry Systems for Use in Radiation Process-ing2.2ISO/ASTM Standards:251261 Practice for Calibration of Routine Dosimetry Sys-tems for Radiation Processing51431 Practice for Dosimetry in Electron and X-Ray(Bremsstrahlung)Irradiation Facilities for Food Process-ing51649 Practice for Dosimetry in an Electron Beam Facilityfor Radiation Processing at Energies Between 300 keVand 25 MeV51707 Guide for Estimating Uncertainties in Dosimetry forRadiation Processing2.3International Commission on Radiation Units andMeasurements(ICRU)Reports:3ICRU Report 34 The Dosimetry of Pulsed RadiationICRU Report 35 Radiation Dosimetry:Electron Beams withEnergies Between 1 and 50 MeVICRU Report 37 Stopping Powers for Electrons and Posi-tronsICRU Report 44 Tissue Substitutes in Radiation Dosimetryand MeasurementsICRU Report 80 Dosimetry Systems for use in RadiationProcessing1This practice is under the jurisdiction of ASTM Committee E61 on RadiationProcessing and is the direct responsibility of Subcommittee E61.02 on DosimetrySystems,and is also under the jurisdiction of ISO/TC 85/WG 3.Current edition approved Aug.16,2012.Published April 2013.Originallypublished as E 1631 94.ASTM E 1631 961was adopted by ISO in 1998 withthe intermediate designation ISO 15568:1998(E).The present International StandardISO/ASTM 51631:2013(E)replaces ISO 15568 and is a major revision of the lastprevious edition ISO/ASTM 516312003(E).2For referenced ASTM and ISO/ASTM standards,visit the ASTM website,www.astm.org,or contact ASTM Customer Service at serviceastm.org.ForAnnual Book of ASTM Standards volume information,refer to the standardsDocument Summary page on the ASTM website.3Available from the Commission on Radiation Units and Measurements,7910Woodmont Ave.,Suite 800,Bethesda,MD 20814,U.S.A.1 ISO/ASTM International 2013 All rights reservedCopyright ASTM International Provided by IHS under license with ASTM Licensee=University of Michigan/5967164002 Not for Resale,08/03/2013 19:38:58 MDTNo reproduction or networking permitted without license from IHS-,-,-ICRU Report 85a Fundamental Quantities and Units forIonizing Radiation2.4Joint Committee for Guides in Metrology(JCGM)Reports:4JCGM 100:2008,GUM 1995,with minor corrections,Evaluation of measurement data Guide to the Expres-sion of Uncertainty in Measurement3.Terminology3.1 Definitions:3.1.1 primary-standard dosimetry systemdosimetry sys-tem that is designated or widely acknowledged as having thehi